Key clinical point: In patients with human epidermal growth factor receptor 2-negative (HER2−) inflammatory breast cancer (BC), the estrogen receptor-positive (ER+)/progesterone receptor-negative (PR−) vs ER+/PR+ phenotype was associated with significantly worse survival outcomes.

Major finding: Patients with ER+/PR‒ vs ER+/PR+ phenotype had significantly worse BC-specific survival (hazard ratio [HR] 1.764; P < .001) and overall survival (HR 1.675; P < .001) outcomes.

Study details: This retrospective study analyzed the data of 1553 women with ER+/HER2− inflammatory BC from the Surveillance, Epidemiology, and End Results (SEER) database, of whom 25.5% and 74.5% of patients presented with ER+/PR− and ER+/PR+ phenotypes, respectively.

Disclosures: This study was supported by grants from the North Sichuan Medical College Scientific Research and Development Project and Guigang Science and Technology Project. The authors declared no conflicts of interest.

Source: Luo Y et al. ER+/PR− phenotype exhibits more aggressive biological features and worse outcome compared with ER+/PR+ phenotype in HER2-negative inflammatory breast cancer. Sci Rep. 2024;14:197 (Jan 2). doi: 10.1038/s41598-023-50755-4

Key clinical point: In patients with human epidermal growth factor receptor 2-negative (HER2−) inflammatory breast cancer (BC), the estrogen receptor-positive (ER+)/progesterone receptor-negative (PR−) vs ER+/PR+ phenotype was associated with significantly worse survival outcomes.

Major finding: Patients with ER+/PR‒ vs ER+/PR+ phenotype had significantly worse BC-specific survival (hazard ratio [HR] 1.764; P < .001) and overall survival (HR 1.675; P < .001) outcomes.

Study details: This retrospective study analyzed the data of 1553 women with ER+/HER2− inflammatory BC from the Surveillance, Epidemiology, and End Results (SEER) database, of whom 25.5% and 74.5% of patients presented with ER+/PR− and ER+/PR+ phenotypes, respectively.

Disclosures: This study was supported by grants from the North Sichuan Medical College Scientific Research and Development Project and Guigang Science and Technology Project. The authors declared no conflicts of interest.

Source: Luo Y et al. ER+/PR− phenotype exhibits more aggressive biological features and worse outcome compared with ER+/PR+ phenotype in HER2-negative inflammatory breast cancer. Sci Rep. 2024;14:197 (Jan 2). doi: 10.1038/s41598-023-50755-4

Key clinical point: In patients with human epidermal growth factor receptor 2-negative (HER2−) inflammatory breast cancer (BC), the estrogen receptor-positive (ER+)/progesterone receptor-negative (PR−) vs ER+/PR+ phenotype was associated with significantly worse survival outcomes.

Major finding: Patients with ER+/PR‒ vs ER+/PR+ phenotype had significantly worse BC-specific survival (hazard ratio [HR] 1.764; P < .001) and overall survival (HR 1.675; P < .001) outcomes.

Study details: This retrospective study analyzed the data of 1553 women with ER+/HER2− inflammatory BC from the Surveillance, Epidemiology, and End Results (SEER) database, of whom 25.5% and 74.5% of patients presented with ER+/PR− and ER+/PR+ phenotypes, respectively.

Disclosures: This study was supported by grants from the North Sichuan Medical College Scientific Research and Development Project and Guigang Science and Technology Project. The authors declared no conflicts of interest.

Source: Luo Y et al. ER+/PR− phenotype exhibits more aggressive biological features and worse outcome compared with ER+/PR+ phenotype in HER2-negative inflammatory breast cancer. Sci Rep. 2024;14:197 (Jan 2). doi: 10.1038/s41598-023-50755-4

Key clinical point: Combining radiotherapy with pyrotinib and capecitabine led to improved intracranial survival outcomes and an acceptable radiation necrosis rate in patients with human epidermal growth factor receptor 2-positive (ERBB2+) breast cancer (BC) with brain metastases.

Major finding: The 1-year central nervous system (CNS) progression-free survival (PFS) rate was 74.9% (95% CI 61.9%-90.7%), and the median CNS PFS was 18.0 months (95% CI 15.5-not reached). Diarrhea (7.5%) was the most common grade ≥ 3 treatment-related adverse event. Asymptomatic radiation necrosis was identified in only 6% of the 67 lesions treated with fractionated stereotactic radiotherapy.

Study details: Findings are from a phase 2 trial that included 40 women with ERBB2+ BC and brain metastases who received fractionated stereotactic or whole-brain radiotherapy and initiated treatment with pyrotinib and capecitabine.

Disclosures: This study was supported by the National Natural Science Foundation of China (NSFC). Three authors declared receiving grants or personal fees from various sources, including the NSFC.

Source: Yang Z et al. Brain radiotherapy with pyrotinib and capecitabine in patients with ERBB2-positive advanced breast cancer and brain metastases: A nonrandomized phase 2 trial. JAMA Oncol. 2024 (Jan 4). doi: 10.1001/jamaoncol.2023.5791

Key clinical point: Combining radiotherapy with pyrotinib and capecitabine led to improved intracranial survival outcomes and an acceptable radiation necrosis rate in patients with human epidermal growth factor receptor 2-positive (ERBB2+) breast cancer (BC) with brain metastases.

Major finding: The 1-year central nervous system (CNS) progression-free survival (PFS) rate was 74.9% (95% CI 61.9%-90.7%), and the median CNS PFS was 18.0 months (95% CI 15.5-not reached). Diarrhea (7.5%) was the most common grade ≥ 3 treatment-related adverse event. Asymptomatic radiation necrosis was identified in only 6% of the 67 lesions treated with fractionated stereotactic radiotherapy.

Study details: Findings are from a phase 2 trial that included 40 women with ERBB2+ BC and brain metastases who received fractionated stereotactic or whole-brain radiotherapy and initiated treatment with pyrotinib and capecitabine.

Disclosures: This study was supported by the National Natural Science Foundation of China (NSFC). Three authors declared receiving grants or personal fees from various sources, including the NSFC.

Source: Yang Z et al. Brain radiotherapy with pyrotinib and capecitabine in patients with ERBB2-positive advanced breast cancer and brain metastases: A nonrandomized phase 2 trial. JAMA Oncol. 2024 (Jan 4). doi: 10.1001/jamaoncol.2023.5791

Key clinical point: Combining radiotherapy with pyrotinib and capecitabine led to improved intracranial survival outcomes and an acceptable radiation necrosis rate in patients with human epidermal growth factor receptor 2-positive (ERBB2+) breast cancer (BC) with brain metastases.

Major finding: The 1-year central nervous system (CNS) progression-free survival (PFS) rate was 74.9% (95% CI 61.9%-90.7%), and the median CNS PFS was 18.0 months (95% CI 15.5-not reached). Diarrhea (7.5%) was the most common grade ≥ 3 treatment-related adverse event. Asymptomatic radiation necrosis was identified in only 6% of the 67 lesions treated with fractionated stereotactic radiotherapy.

Study details: Findings are from a phase 2 trial that included 40 women with ERBB2+ BC and brain metastases who received fractionated stereotactic or whole-brain radiotherapy and initiated treatment with pyrotinib and capecitabine.

Disclosures: This study was supported by the National Natural Science Foundation of China (NSFC). Three authors declared receiving grants or personal fees from various sources, including the NSFC.

Source: Yang Z et al. Brain radiotherapy with pyrotinib and capecitabine in patients with ERBB2-positive advanced breast cancer and brain metastases: A nonrandomized phase 2 trial. JAMA Oncol. 2024 (Jan 4). doi: 10.1001/jamaoncol.2023.5791

Key clinical point: In patients with early breast cancer (BC) who were undergoing breast-conserving surgery and sentinel lymph node detection (SLND), a combination of paramagnetic seed + superparamagnetic iron oxide (SPIO) led to comparable rates of re-excision and resection ratios as the more standard approach with guidewire + SPIO.

Major finding: Paramagnetic seed + SPIO and guidewire + SPIO showed comparable re-excision rates (2.87% vs 2.84%; P = .99) and median resection ratios (2.01 vs 1.93; P = .70). The rate of failed breast lesion localizations was significantly more in the guidewire vs paramagnetic seed group (10.1% vs 1.9%; P < .001).

Study details: Findings are from the phase 3 MAGTOTAL trial that included 426 patients with early BC scheduled to undergo breast-conserving surgery and SLND who were randomly assigned to either lesion localization using paramagnetic seed + SPIO or guidewire + SPIO.

Disclosures: This study was supported partly by Uppsala University Hospital. Sweden, and institutional grants from Uppsala University and other sources. A Karakatsanis declared receiving grants and honoraria from various sources outside the study.

Source: Pantiora E et al. Magnetic seed vs guidewire breast cancer localization with magnetic lymph node detection: A randomized clinical trial. JAMA Surg. 2023 (Dec 27). doi: 10.1001/jamasurg.2023.6520

Key clinical point: In patients with early breast cancer (BC) who were undergoing breast-conserving surgery and sentinel lymph node detection (SLND), a combination of paramagnetic seed + superparamagnetic iron oxide (SPIO) led to comparable rates of re-excision and resection ratios as the more standard approach with guidewire + SPIO.

Major finding: Paramagnetic seed + SPIO and guidewire + SPIO showed comparable re-excision rates (2.87% vs 2.84%; P = .99) and median resection ratios (2.01 vs 1.93; P = .70). The rate of failed breast lesion localizations was significantly more in the guidewire vs paramagnetic seed group (10.1% vs 1.9%; P < .001).

Study details: Findings are from the phase 3 MAGTOTAL trial that included 426 patients with early BC scheduled to undergo breast-conserving surgery and SLND who were randomly assigned to either lesion localization using paramagnetic seed + SPIO or guidewire + SPIO.

Disclosures: This study was supported partly by Uppsala University Hospital. Sweden, and institutional grants from Uppsala University and other sources. A Karakatsanis declared receiving grants and honoraria from various sources outside the study.

Source: Pantiora E et al. Magnetic seed vs guidewire breast cancer localization with magnetic lymph node detection: A randomized clinical trial. JAMA Surg. 2023 (Dec 27). doi: 10.1001/jamasurg.2023.6520

Key clinical point: In patients with early breast cancer (BC) who were undergoing breast-conserving surgery and sentinel lymph node detection (SLND), a combination of paramagnetic seed + superparamagnetic iron oxide (SPIO) led to comparable rates of re-excision and resection ratios as the more standard approach with guidewire + SPIO.

Major finding: Paramagnetic seed + SPIO and guidewire + SPIO showed comparable re-excision rates (2.87% vs 2.84%; P = .99) and median resection ratios (2.01 vs 1.93; P = .70). The rate of failed breast lesion localizations was significantly more in the guidewire vs paramagnetic seed group (10.1% vs 1.9%; P < .001).

Study details: Findings are from the phase 3 MAGTOTAL trial that included 426 patients with early BC scheduled to undergo breast-conserving surgery and SLND who were randomly assigned to either lesion localization using paramagnetic seed + SPIO or guidewire + SPIO.

Disclosures: This study was supported partly by Uppsala University Hospital. Sweden, and institutional grants from Uppsala University and other sources. A Karakatsanis declared receiving grants and honoraria from various sources outside the study.

Source: Pantiora E et al. Magnetic seed vs guidewire breast cancer localization with magnetic lymph node detection: A randomized clinical trial. JAMA Surg. 2023 (Dec 27). doi: 10.1001/jamasurg.2023.6520

Key clinical point: Induction treatment with bevacizumab, etoposide, and cisplatin (BEEP) before whole-brain radiotherapy (WBRT) vs WBRT alone improved brain-specific progression-free survival (PFS) outcomes in patients with brain metastases from breast cancer (BMBC).

Major finding: Patients who received BEEP + WBRT vs WBRT alone had significantly longer median brain-specific PFS based on a predefined α level of ≤0.20 (8.1 vs 6.5 months; hazard ratio 0.71; P = .15) and higher 8-month brain-specific PFS rate (48.7% vs 26.3%; P = .03). Neutropenia, nausea, anemia, and leukopenia were the most common adverse events in the BEEP induction arm.

Study details: Findings are from the phase 2 A-PLUS trial that included 118 WBRT-naive patients with invasive breast cancer who had ≥1 metastatic brain tumors and were randomly assigned to receive BEEP induction followed by WBRT or only WBRT.

Disclosures: This study received investigational product support and grants funding from Roche Taiwan, Chugai Pharma Taiwan, and other sources. Four authors declared receiving personal fees, lecture fees, consulting or speakers’ bureau fees, travel support, or grants from Roche and other sources.

Source: Chen TW et al. Whole-brain radiotherapy alone vs preceded by bevacizumab, etoposide, and cisplatin for untreated brain metastases from breast cancer: A randomized clinical trial. JAMA Oncol. 2023 (Dec 21). doi: 10.1001/jamaoncol.2023.5456

Key clinical point: Induction treatment with bevacizumab, etoposide, and cisplatin (BEEP) before whole-brain radiotherapy (WBRT) vs WBRT alone improved brain-specific progression-free survival (PFS) outcomes in patients with brain metastases from breast cancer (BMBC).

Major finding: Patients who received BEEP + WBRT vs WBRT alone had significantly longer median brain-specific PFS based on a predefined α level of ≤0.20 (8.1 vs 6.5 months; hazard ratio 0.71; P = .15) and higher 8-month brain-specific PFS rate (48.7% vs 26.3%; P = .03). Neutropenia, nausea, anemia, and leukopenia were the most common adverse events in the BEEP induction arm.

Study details: Findings are from the phase 2 A-PLUS trial that included 118 WBRT-naive patients with invasive breast cancer who had ≥1 metastatic brain tumors and were randomly assigned to receive BEEP induction followed by WBRT or only WBRT.

Disclosures: This study received investigational product support and grants funding from Roche Taiwan, Chugai Pharma Taiwan, and other sources. Four authors declared receiving personal fees, lecture fees, consulting or speakers’ bureau fees, travel support, or grants from Roche and other sources.

Source: Chen TW et al. Whole-brain radiotherapy alone vs preceded by bevacizumab, etoposide, and cisplatin for untreated brain metastases from breast cancer: A randomized clinical trial. JAMA Oncol. 2023 (Dec 21). doi: 10.1001/jamaoncol.2023.5456

Key clinical point: Induction treatment with bevacizumab, etoposide, and cisplatin (BEEP) before whole-brain radiotherapy (WBRT) vs WBRT alone improved brain-specific progression-free survival (PFS) outcomes in patients with brain metastases from breast cancer (BMBC).

Major finding: Patients who received BEEP + WBRT vs WBRT alone had significantly longer median brain-specific PFS based on a predefined α level of ≤0.20 (8.1 vs 6.5 months; hazard ratio 0.71; P = .15) and higher 8-month brain-specific PFS rate (48.7% vs 26.3%; P = .03). Neutropenia, nausea, anemia, and leukopenia were the most common adverse events in the BEEP induction arm.

Study details: Findings are from the phase 2 A-PLUS trial that included 118 WBRT-naive patients with invasive breast cancer who had ≥1 metastatic brain tumors and were randomly assigned to receive BEEP induction followed by WBRT or only WBRT.

Disclosures: This study received investigational product support and grants funding from Roche Taiwan, Chugai Pharma Taiwan, and other sources. Four authors declared receiving personal fees, lecture fees, consulting or speakers’ bureau fees, travel support, or grants from Roche and other sources.

Source: Chen TW et al. Whole-brain radiotherapy alone vs preceded by bevacizumab, etoposide, and cisplatin for untreated brain metastases from breast cancer: A randomized clinical trial. JAMA Oncol. 2023 (Dec 21). doi: 10.1001/jamaoncol.2023.5456

Key clinical point: Adding atezolizumab to carboplatin improved overall survival (OS) outcomes in patients with metastatic triple-negative breast cancer (TNBC).

Major finding: Compared with carboplatin alone, carboplatin + atezolizumab demonstrated significant improvement in OS outcomes (hazard ratio [HR] 0.60; log-rank P = .03) even though the improvement in the primary endpoint of progression-free survival was not statistically significant (HR 0.66; log-rank P = .05). The prevalence of grade 3/4 serious adverse events was higher with carboplatin + atezolizumab vs carboplatin alone (41% vs 8%).

Study details: Findings are from the phase 2 TBCRC 043 trial that included 106 patients with metastatic TNBC who were randomly assigned to receive either carboplatin alone or in combination with atezolizumab.

Disclosures: This study was supported by a US National Cancer Institute grant, Susan G. Komen grants, and other sources. Some authors declared receiving grants or personal fees from or having other ties with various sources, including the funding agencies.

Source: Lehmann BD et al. Atezolizumab in combination with carboplatin and survival outcomes in patients with metastatic triple-negative breast cancer: The TBCRC 043 phase 2 randomized clinical trial. JAMA Oncol. 2023 (Dec 14). doi: 10.1001/jamaoncol.2023.5424

Key clinical point: Adding atezolizumab to carboplatin improved overall survival (OS) outcomes in patients with metastatic triple-negative breast cancer (TNBC).

Major finding: Compared with carboplatin alone, carboplatin + atezolizumab demonstrated significant improvement in OS outcomes (hazard ratio [HR] 0.60; log-rank P = .03) even though the improvement in the primary endpoint of progression-free survival was not statistically significant (HR 0.66; log-rank P = .05). The prevalence of grade 3/4 serious adverse events was higher with carboplatin + atezolizumab vs carboplatin alone (41% vs 8%).

Study details: Findings are from the phase 2 TBCRC 043 trial that included 106 patients with metastatic TNBC who were randomly assigned to receive either carboplatin alone or in combination with atezolizumab.

Disclosures: This study was supported by a US National Cancer Institute grant, Susan G. Komen grants, and other sources. Some authors declared receiving grants or personal fees from or having other ties with various sources, including the funding agencies.

Source: Lehmann BD et al. Atezolizumab in combination with carboplatin and survival outcomes in patients with metastatic triple-negative breast cancer: The TBCRC 043 phase 2 randomized clinical trial. JAMA Oncol. 2023 (Dec 14). doi: 10.1001/jamaoncol.2023.5424

Key clinical point: Adding atezolizumab to carboplatin improved overall survival (OS) outcomes in patients with metastatic triple-negative breast cancer (TNBC).

Major finding: Compared with carboplatin alone, carboplatin + atezolizumab demonstrated significant improvement in OS outcomes (hazard ratio [HR] 0.60; log-rank P = .03) even though the improvement in the primary endpoint of progression-free survival was not statistically significant (HR 0.66; log-rank P = .05). The prevalence of grade 3/4 serious adverse events was higher with carboplatin + atezolizumab vs carboplatin alone (41% vs 8%).

Study details: Findings are from the phase 2 TBCRC 043 trial that included 106 patients with metastatic TNBC who were randomly assigned to receive either carboplatin alone or in combination with atezolizumab.

Disclosures: This study was supported by a US National Cancer Institute grant, Susan G. Komen grants, and other sources. Some authors declared receiving grants or personal fees from or having other ties with various sources, including the funding agencies.

Source: Lehmann BD et al. Atezolizumab in combination with carboplatin and survival outcomes in patients with metastatic triple-negative breast cancer: The TBCRC 043 phase 2 randomized clinical trial. JAMA Oncol. 2023 (Dec 14). doi: 10.1001/jamaoncol.2023.5424

Key clinical point: Compared with the general population, the risk for overall breast cancer (BC) was nearly double in women with benign breast disease (BBD) diagnosed by percutaneous biopsies.

Major finding: Patients with BBD vs the general population were at a significantly higher risk for overall BC (standard incidence ratio [SIR] 1.95; 95% CI 1.76-2.17), including invasive BC (SIR 1.56; 95% CI 1.37-1.78) and ductal carcinoma in situ (SIR 3.10; 95% CI 2.54-3.77). The SIR for overall BC increased progressively with increasing BBD severity (nonproliferative 1.42; 95% CI 1.19-1.71; proliferative disease without atypia 2.19; 95% CI 1.88-2.54; atypical hyperplasia 3.91; 95% CI 2.97-5.14).

Study details: Findings are from a retrospective cohort study including 4819 female patients who underwent a BBD biopsy, of whom 338 patients had incident BC.

Disclosures: This study was supported by a grant from the US National Institutes of Health (NIH). Four authors declared receiving grants, research support, or personal fees from NIH and other sources.

Source: Sherman ME et al. Benign breast disease and breast cancer risk in the percutaneous biopsy era. JAMA Surg. 2023 (Dec 13). doi: 10.1001/jamasurg.2023.6382

Key clinical point: Compared with the general population, the risk for overall breast cancer (BC) was nearly double in women with benign breast disease (BBD) diagnosed by percutaneous biopsies.

Major finding: Patients with BBD vs the general population were at a significantly higher risk for overall BC (standard incidence ratio [SIR] 1.95; 95% CI 1.76-2.17), including invasive BC (SIR 1.56; 95% CI 1.37-1.78) and ductal carcinoma in situ (SIR 3.10; 95% CI 2.54-3.77). The SIR for overall BC increased progressively with increasing BBD severity (nonproliferative 1.42; 95% CI 1.19-1.71; proliferative disease without atypia 2.19; 95% CI 1.88-2.54; atypical hyperplasia 3.91; 95% CI 2.97-5.14).

Study details: Findings are from a retrospective cohort study including 4819 female patients who underwent a BBD biopsy, of whom 338 patients had incident BC.

Disclosures: This study was supported by a grant from the US National Institutes of Health (NIH). Four authors declared receiving grants, research support, or personal fees from NIH and other sources.

Source: Sherman ME et al. Benign breast disease and breast cancer risk in the percutaneous biopsy era. JAMA Surg. 2023 (Dec 13). doi: 10.1001/jamasurg.2023.6382

Key clinical point: Compared with the general population, the risk for overall breast cancer (BC) was nearly double in women with benign breast disease (BBD) diagnosed by percutaneous biopsies.

Major finding: Patients with BBD vs the general population were at a significantly higher risk for overall BC (standard incidence ratio [SIR] 1.95; 95% CI 1.76-2.17), including invasive BC (SIR 1.56; 95% CI 1.37-1.78) and ductal carcinoma in situ (SIR 3.10; 95% CI 2.54-3.77). The SIR for overall BC increased progressively with increasing BBD severity (nonproliferative 1.42; 95% CI 1.19-1.71; proliferative disease without atypia 2.19; 95% CI 1.88-2.54; atypical hyperplasia 3.91; 95% CI 2.97-5.14).

Study details: Findings are from a retrospective cohort study including 4819 female patients who underwent a BBD biopsy, of whom 338 patients had incident BC.

Disclosures: This study was supported by a grant from the US National Institutes of Health (NIH). Four authors declared receiving grants, research support, or personal fees from NIH and other sources.

Source: Sherman ME et al. Benign breast disease and breast cancer risk in the percutaneous biopsy era. JAMA Surg. 2023 (Dec 13). doi: 10.1001/jamasurg.2023.6382

A recent article in Cell & Bioscience suggested that regular coffee consumption can reduce the risk of COVID infections.

The study does make some interesting points about the benefits of coffee’s different polyphenols and antioxidants and their effects on different COVID variants. Most of it is based on lab data, although one section, using serum from coffee versus water drinkers, did find that it was more effective at inhibiting the virions. Caffeinated versus decaffeinated didn’t matter.

I’m not saying coffee doesn’t impair the virus. The data are worth looking at. But the majority of adults in North America, Europe, and pretty much the entire planet drink coffee on a regular basis. A large number of them still caught COVID. Would they have had worse cases if they didn’t drink coffee? Maybe, maybe not.

The problem here is that, as always, preliminary data like this get pushed into mass media, making it sound like “COFFEE CURES COVID!!!” Never mind that that’s not what the article said, but it sure gets clicks and retweets and FaceBook “likes.”

Suddenly fringe groups are claiming the coffee cure was there all along, and hidden from them by the evil government-pharma-medical cartel. Others claim the research is flawed because of this or that. The signal gets drowned out by the noise.

Definitely, food can be a medicine. Look at all the benefits proven of the Mediterranean diet. Coffee may help, especially if we can identify and isolate the specific components that reduce COVID risk. But, as they always say at the end, the study is preliminary and further research is needed.

Once or twice a year, an adult with epilepsy comes in, waving a copy of the ketogenic diet around and upset that I never tried it on them — again proof of the evil government-pharma-medical cartel that I’m in league with. I calm them down and explain the diet in detail. Maybe 50% of them decide to go ahead with it. In 25 years of practice, my record for an otherwise normal adult sticking with it is 5 days.

You don’t have to go too far back to remember Linus Pauling, an absolutely brilliant scientist, but not the best of nutritionists. With two Nobel prizes behind him, he took a stab at medicine in the 1970s, arguing that megadoses of vitamin C worked for the common cold. While it may be good for us, and certainly most people like orange juice, but those claims about the common cold never panned out. In fact, we’re no closer to curing it now than we were then.

Just because something seems promising in early studies doesn’t mean it will pan out. It might, but this doesn’t mean the “truth” is being maliciously hidden by an evil cartel. It just means we have (as always) more to learn.

I’ll still drink my single cup of coffee every weekday morning. I’m a creature of habit, and heaven knows I need the caffeine. If it also boosts my immune system, so much the better.

Besides, we still have that universal antimicrobial called chicken soup.
 

Dr. Block has a solo neurology practice in Scottsdale, Ariz.

A recent article in Cell & Bioscience suggested that regular coffee consumption can reduce the risk of COVID infections.

The study does make some interesting points about the benefits of coffee’s different polyphenols and antioxidants and their effects on different COVID variants. Most of it is based on lab data, although one section, using serum from coffee versus water drinkers, did find that it was more effective at inhibiting the virions. Caffeinated versus decaffeinated didn’t matter.

I’m not saying coffee doesn’t impair the virus. The data are worth looking at. But the majority of adults in North America, Europe, and pretty much the entire planet drink coffee on a regular basis. A large number of them still caught COVID. Would they have had worse cases if they didn’t drink coffee? Maybe, maybe not.

The problem here is that, as always, preliminary data like this get pushed into mass media, making it sound like “COFFEE CURES COVID!!!” Never mind that that’s not what the article said, but it sure gets clicks and retweets and FaceBook “likes.”

Suddenly fringe groups are claiming the coffee cure was there all along, and hidden from them by the evil government-pharma-medical cartel. Others claim the research is flawed because of this or that. The signal gets drowned out by the noise.

Definitely, food can be a medicine. Look at all the benefits proven of the Mediterranean diet. Coffee may help, especially if we can identify and isolate the specific components that reduce COVID risk. But, as they always say at the end, the study is preliminary and further research is needed.

Once or twice a year, an adult with epilepsy comes in, waving a copy of the ketogenic diet around and upset that I never tried it on them — again proof of the evil government-pharma-medical cartel that I’m in league with. I calm them down and explain the diet in detail. Maybe 50% of them decide to go ahead with it. In 25 years of practice, my record for an otherwise normal adult sticking with it is 5 days.

You don’t have to go too far back to remember Linus Pauling, an absolutely brilliant scientist, but not the best of nutritionists. With two Nobel prizes behind him, he took a stab at medicine in the 1970s, arguing that megadoses of vitamin C worked for the common cold. While it may be good for us, and certainly most people like orange juice, but those claims about the common cold never panned out. In fact, we’re no closer to curing it now than we were then.

Just because something seems promising in early studies doesn’t mean it will pan out. It might, but this doesn’t mean the “truth” is being maliciously hidden by an evil cartel. It just means we have (as always) more to learn.

I’ll still drink my single cup of coffee every weekday morning. I’m a creature of habit, and heaven knows I need the caffeine. If it also boosts my immune system, so much the better.

Besides, we still have that universal antimicrobial called chicken soup.
 

Dr. Block has a solo neurology practice in Scottsdale, Ariz.

A recent article in Cell & Bioscience suggested that regular coffee consumption can reduce the risk of COVID infections.

The study does make some interesting points about the benefits of coffee’s different polyphenols and antioxidants and their effects on different COVID variants. Most of it is based on lab data, although one section, using serum from coffee versus water drinkers, did find that it was more effective at inhibiting the virions. Caffeinated versus decaffeinated didn’t matter.

I’m not saying coffee doesn’t impair the virus. The data are worth looking at. But the majority of adults in North America, Europe, and pretty much the entire planet drink coffee on a regular basis. A large number of them still caught COVID. Would they have had worse cases if they didn’t drink coffee? Maybe, maybe not.

The problem here is that, as always, preliminary data like this get pushed into mass media, making it sound like “COFFEE CURES COVID!!!” Never mind that that’s not what the article said, but it sure gets clicks and retweets and FaceBook “likes.”

Suddenly fringe groups are claiming the coffee cure was there all along, and hidden from them by the evil government-pharma-medical cartel. Others claim the research is flawed because of this or that. The signal gets drowned out by the noise.

Definitely, food can be a medicine. Look at all the benefits proven of the Mediterranean diet. Coffee may help, especially if we can identify and isolate the specific components that reduce COVID risk. But, as they always say at the end, the study is preliminary and further research is needed.

Once or twice a year, an adult with epilepsy comes in, waving a copy of the ketogenic diet around and upset that I never tried it on them — again proof of the evil government-pharma-medical cartel that I’m in league with. I calm them down and explain the diet in detail. Maybe 50% of them decide to go ahead with it. In 25 years of practice, my record for an otherwise normal adult sticking with it is 5 days.

You don’t have to go too far back to remember Linus Pauling, an absolutely brilliant scientist, but not the best of nutritionists. With two Nobel prizes behind him, he took a stab at medicine in the 1970s, arguing that megadoses of vitamin C worked for the common cold. While it may be good for us, and certainly most people like orange juice, but those claims about the common cold never panned out. In fact, we’re no closer to curing it now than we were then.

Just because something seems promising in early studies doesn’t mean it will pan out. It might, but this doesn’t mean the “truth” is being maliciously hidden by an evil cartel. It just means we have (as always) more to learn.

I’ll still drink my single cup of coffee every weekday morning. I’m a creature of habit, and heaven knows I need the caffeine. If it also boosts my immune system, so much the better.

Besides, we still have that universal antimicrobial called chicken soup.
 

Dr. Block has a solo neurology practice in Scottsdale, Ariz.

Introduction: The Many Lanes of Research on Magnesium Sulfate

The research that improves human health in the most expedient and most impactful ways is multitiered, with basic or fundamental research, translational research, interventional studies, and retrospective research often occurring simultaneously. There should be no “single lane” of research and one type of research does not preclude the other.

Too often, we fall short in one of these lanes. While we have achieved many moonshots in obstetrics and maternal-fetal medicine, we have tended not to place a high priority on basic research, which can provide a strong understanding of the biology of major diseases and conditions affecting women and their offspring. When conducted with proper commitment and funding, such research can lead to biologically directed therapy.

Within our specialty, research on how we can effectively prevent preterm birth, prematurity, and preeclampsia has taken a long road, with various types of therapies being tried, but none being overwhelmingly effective — with an ongoing need for more basic or fundamental research. Nevertheless, we can benefit and gain great insights from retrospective and interventional studies associated with clinical therapies used to treat premature labor and preeclampsia when these therapies have an unanticipated and important secondary benefit.

This month our Master Class is focused on the neuroprotection of prematurity. Magnesium sulfate is a valuable tool for the treatment of both premature labor and preeclampsia, and more recently, also for neuroprotection of the fetus. Interestingly, this use stemmed from researchers looking retrospectively at outcomes in women who received the compound for other reasons. It took many years for researchers to prove its neuroprotective value through interventional trials, while researchers simultaneously strove to understand on a basic biologic level how magnesium sulfate works to prevent outcomes such as cerebral palsy.

Basic research underway today continues to improve our understanding of its precise mechanisms of action. Combined with other tiers of research — including more interventional studies and more translational research — we can improve its utility for the neuroprotection of prematurity. Alternatively, ongoing research may lead to different, even more effective treatments.

Our guest author is Irina Burd, MD, PhD, Sylvan Freiman, MD Endowed Professor and Chair of the department of obstetrics, gynecology, and reproductive sciences at the University of Maryland School of Medicine.* Dr. Burd is also a physician-scientist. She recounts the important story of magnesium sulfate and what is currently known about its biologic plausibility in neuroprotection — including through her own studies – as well as what may be coming in the future.

E. Albert Reece, MD, PhD, MBA, a maternal-fetal medicine specialist, is dean emeritus of the University of Maryland School of Medicine, former university executive vice president; currently the endowed professor and director of the Center for Advanced Research Training and Innovation (CARTI), and senior scientist in the Center for Birth Defects Research. Dr. Reece reported no relevant disclosures. He is the medical editor of this column. Contact him at [email protected].
 

Magnesium Sulfate for Fetal Neuroprotection in Preterm Birth

Without a doubt, magnesium sulfate (MgSO₄) given before anticipated preterm birth reduces the risk of cerebral palsy. It is a valuable tool for fetal neuroprotection at a time when there are no proven alternatives. Yet without the persistent research that occurred over more than 20 years, it may not have won the endorsement of the American College of Obstetrics and Gynecologists in 2010 and worked its way into routine practice.

Its history is worthy of reflection. It took years of observational trials (not all of which showed neuroprotective effects), six randomized controlled trials (none of which met their primary endpoint), three meta-analyses, and a Cochrane Database Systematic Review to arrive at the conclusion that antenatal magnesium sulfate therapy given to women at risk of preterm birth has definitive neuroprotective benefit.

Origins and Biologic Plausibility

The MgSO₄ story is rooted in the late seventeenth century discovery by physician Nehemiah Grew that the compound was the key component of the then-famous medicinal spring waters in Epsom, England.¹ MgSO₄ was first used for eclampsia in 1906,² and was first reported in the American literature for eclampsia in 1925.³ In 1959, its effect as a tocolytic agent was reported.⁴

More than 30 years later, in 1995, an observational study coauthored by Karin B. Nelson, MD, and Judith K. Grether, PhD of the National Institutes of Health, showed a reduced risk of cerebral palsy in very-low-birth-weight infants (VLBW).⁵ The report marked a turning point in research interest on neuroprotection for anticipated preterm birth.

The precise molecular mechanisms of action of MgSO₄ for neuroprotection are still not well understood. However, research findings from the University of Maryland and other institutions have provided biologic plausibility for its use to prevent cerebral palsy. Our current thinking is that it involves the prevention of periventricular white matter injury and/or the prevention of oxidative stress and a neuronal injury mechanism called excitotoxicity.

Periventricular white matter injury involving injury to preoligodendrocytes before 32 weeks’ gestation is the most prevalent injury seen in cerebral palsy; preoligodendrocytes are precursors of myelinating oligodendrocytes, which constitute a major glial population in the white matter. Our research in a mouse model demonstrated that the intrauterine inflammation frequently associated with preterm birth can lead to neuronal injury as well as white matter damage, and that MgSO₄ may ameliorate both.^6,7

Excitotoxicity results from excessive stimulation of N-methyl-D-aspartate (NMDA) glutamatergic receptors on preoligodendrocytes and a rush of calcium through the voltage-gated channels. This calcium influx leads to the production of nitric oxide, oxidative stress, and subsequent mitochondrial damage and cell death. As a bivalent ion, MgSO₄ sits in the voltage-gated channels of the NMDA receptors and reduces glutamatergic signaling, thus serving as a calcium antagonist and modulating calcium influx (See Figure).

The Long Route of Research

The 1995 Nelson-Grether study compared VLBW (< 1500 g) infants who survived and developed moderate/severe cerebral palsy within 3 years to randomly selected VLBW controls with respect to whether their mothers had received MgSO₄ to prevent seizures in preeclampsia or as a tocolytic agent.⁵ In a population of more than 155,000 children born between 1983 and 1985, in utero exposure to MgSO₄ was reported in 7.1% of 42 VLBW infants with cerebral palsy and 36% of 75 VLBW controls (odds ratio [OR], 0.14; 95% CI, 0.05-0.51). In women without preeclampsia the OR increased to 0.25.

This motivating study had been preceded by several observational studies showing that infants born to women with preeclampsia who received MgSO₄ had significantly lower risks of developing intraventricular hemorrhage (IVH) and germinal matrix hemorrhage (GMH). In one of these studies, published in 1992, Karl C. Kuban, MD, and coauthors reported that “maternal receipt of magnesium sulfate was associated with diminished risk of GMH-IVH even in those babies born to mothers who apparently did not have preeclampsia.”⁹

In the several years following the 1995 Nelson-Grether study, several other case-control/observational studies were reported, with conflicting conclusions, and investigators around the world began designing and conducting needed randomized controlled trials.

The six published randomized controlled trials looking at MgSO₄ and neuroprotection varied in their inclusion and exclusion criteria, their recruitment and enrollment style, the gestational ages for MgSO₄ administration, loading and maintenance doses, how cerebral palsy or neuroprotection was assessed, and other factors (See Table for RCT characteristics and main outcomes).^10-14 One of the trials aimed primarily at evaluating the efficacy of MgSO₄ for preventing preeclampsia.

Moving Forward

The NNTs calculated in these reviews — ranging from 44 to 63 — are convincing, and are comparable with evidence-based medicine data for prevention of other common diseases.¹⁹ For instance, the NNT for a life saved when aspirin is given immediately after a heart attack is 42. Statins given for 5 years in people with known heart disease have an NNT of 83 to save one life, an NNT of 39 to prevent one nonfatal heart attack, and an NNT of 125 to prevent one stroke. For oral anticoagulants used in nonvalvular atrial fibrillation for primary stroke prevention, the NNTs to prevent one stroke, and one death, are 22 and 42, respectively.¹⁹

In its 2010 Committee Opinion on Magnesium Sulfate Before Anticipated Preterm Birth for Neuroprotection (reaffirmed in 2020), the American College of Obstetricians and Gynecologists left it to institutions to develop their own guidelines “regarding inclusion criteria, treatment regimens, concurrent tocolysis, and monitoring in accordance with one of the larger trials.”²⁰

Not surprisingly, most if not all hospitals have chosen a higher dose of MgSO₄ administered up to 31 weeks’ gestation in keeping with the protocols employed in the NICHD-sponsored BEAM trial (See Table).

The hope moving forward is to expand treatment options for neuroprotection in cases of imminent preterm birth. Researchers have been assessing the ability of melatonin to provide neuroprotection in cases of growth restriction and neonatal asphyxia. Melatonin has anti-inflammatory and antioxidant properties and is known to mediate neuronal generation and synaptic plasticity.²¹

N-acetyl-L-cysteine is another potential neuroprotective agent. It acts as an antioxidant, a precursor to glutathione, and a modulator of the glutamate system and has been studied as a neuroprotective agent in cases of maternal chorioamnionitis.²¹ Both melatonin and N-acetyl-L-cysteine are regarded as safe in pregnancy, but much more clinical study is needed to prove their neuroprotective potential when given shortly before birth or earlier.

Dr. Burd is the Sylvan Freiman, MD Endowed Professor and Chair of the department of obstetrics, gynecology, and reproductive sciences at the University of Maryland School of Medicine, Baltimore. She has no conflicts of interest.  
 

References

1. Clio Med. 1984;19(1-2):1-21.

2. Medicinsk Rev. (Bergen) 1906;32:264-272.

3. Am J Obstet Gynecol. 1996;174(4):1390-1391.

4. Am J Obstet Gynecol. 1959;78(1):27-32.

5. Pediatrics. 1995;95(2):263-269.

6. Am J Obstet Gynecol. 2009;201(3):279.e1-279.e8.

7. Am J Obstet Gynecol. 2010;202(3):292.e1-292.e9.

8. Pediatr Res. 2020;87(3):463-471.

9. J Child Neurol. 1992;7(1):70-76.

10. Lancet. 1997;350:1517-1518.

11. JAMA. 2003;290:2669-2676.

12. BJOG. 2007;114(3):310-318.

13. Lancet. 2002;359(9321):1877-1890.

14. N Engl J Med. 2008;359:895-905.

15. Obstet Gynecol. 2009;113(6):1327-1333.

16. Am J Obstet Gynecol. 2009;200(6):595-609.

17. Obstet Gynecol 2009;114:354-364.

18. Cochrane Database Syst Rev. 2009 Jan 21:(1):CD004661.

19. www.thennt.com.

20. Obstet Gynecol. 2010;115:669-671.

21. Front Synaptic Neurosci. 2012;13:680899.

*This story was corrected on June 10, 2024.

Introduction: The Many Lanes of Research on Magnesium Sulfate

The research that improves human health in the most expedient and most impactful ways is multitiered, with basic or fundamental research, translational research, interventional studies, and retrospective research often occurring simultaneously. There should be no “single lane” of research and one type of research does not preclude the other.

Too often, we fall short in one of these lanes. While we have achieved many moonshots in obstetrics and maternal-fetal medicine, we have tended not to place a high priority on basic research, which can provide a strong understanding of the biology of major diseases and conditions affecting women and their offspring. When conducted with proper commitment and funding, such research can lead to biologically directed therapy.

Within our specialty, research on how we can effectively prevent preterm birth, prematurity, and preeclampsia has taken a long road, with various types of therapies being tried, but none being overwhelmingly effective — with an ongoing need for more basic or fundamental research. Nevertheless, we can benefit and gain great insights from retrospective and interventional studies associated with clinical therapies used to treat premature labor and preeclampsia when these therapies have an unanticipated and important secondary benefit.

This month our Master Class is focused on the neuroprotection of prematurity. Magnesium sulfate is a valuable tool for the treatment of both premature labor and preeclampsia, and more recently, also for neuroprotection of the fetus. Interestingly, this use stemmed from researchers looking retrospectively at outcomes in women who received the compound for other reasons. It took many years for researchers to prove its neuroprotective value through interventional trials, while researchers simultaneously strove to understand on a basic biologic level how magnesium sulfate works to prevent outcomes such as cerebral palsy.

Basic research underway today continues to improve our understanding of its precise mechanisms of action. Combined with other tiers of research — including more interventional studies and more translational research — we can improve its utility for the neuroprotection of prematurity. Alternatively, ongoing research may lead to different, even more effective treatments.

Our guest author is Irina Burd, MD, PhD, Sylvan Freiman, MD Endowed Professor and Chair of the department of obstetrics, gynecology, and reproductive sciences at the University of Maryland School of Medicine.* Dr. Burd is also a physician-scientist. She recounts the important story of magnesium sulfate and what is currently known about its biologic plausibility in neuroprotection — including through her own studies – as well as what may be coming in the future.

E. Albert Reece, MD, PhD, MBA, a maternal-fetal medicine specialist, is dean emeritus of the University of Maryland School of Medicine, former university executive vice president; currently the endowed professor and director of the Center for Advanced Research Training and Innovation (CARTI), and senior scientist in the Center for Birth Defects Research. Dr. Reece reported no relevant disclosures. He is the medical editor of this column. Contact him at [email protected].
 

Magnesium Sulfate for Fetal Neuroprotection in Preterm Birth

Without a doubt, magnesium sulfate (MgSO₄) given before anticipated preterm birth reduces the risk of cerebral palsy. It is a valuable tool for fetal neuroprotection at a time when there are no proven alternatives. Yet without the persistent research that occurred over more than 20 years, it may not have won the endorsement of the American College of Obstetrics and Gynecologists in 2010 and worked its way into routine practice.

Its history is worthy of reflection. It took years of observational trials (not all of which showed neuroprotective effects), six randomized controlled trials (none of which met their primary endpoint), three meta-analyses, and a Cochrane Database Systematic Review to arrive at the conclusion that antenatal magnesium sulfate therapy given to women at risk of preterm birth has definitive neuroprotective benefit.

Origins and Biologic Plausibility

The MgSO₄ story is rooted in the late seventeenth century discovery by physician Nehemiah Grew that the compound was the key component of the then-famous medicinal spring waters in Epsom, England.¹ MgSO₄ was first used for eclampsia in 1906,² and was first reported in the American literature for eclampsia in 1925.³ In 1959, its effect as a tocolytic agent was reported.⁴

More than 30 years later, in 1995, an observational study coauthored by Karin B. Nelson, MD, and Judith K. Grether, PhD of the National Institutes of Health, showed a reduced risk of cerebral palsy in very-low-birth-weight infants (VLBW).⁵ The report marked a turning point in research interest on neuroprotection for anticipated preterm birth.

The precise molecular mechanisms of action of MgSO₄ for neuroprotection are still not well understood. However, research findings from the University of Maryland and other institutions have provided biologic plausibility for its use to prevent cerebral palsy. Our current thinking is that it involves the prevention of periventricular white matter injury and/or the prevention of oxidative stress and a neuronal injury mechanism called excitotoxicity.

Periventricular white matter injury involving injury to preoligodendrocytes before 32 weeks’ gestation is the most prevalent injury seen in cerebral palsy; preoligodendrocytes are precursors of myelinating oligodendrocytes, which constitute a major glial population in the white matter. Our research in a mouse model demonstrated that the intrauterine inflammation frequently associated with preterm birth can lead to neuronal injury as well as white matter damage, and that MgSO₄ may ameliorate both.^6,7

Excitotoxicity results from excessive stimulation of N-methyl-D-aspartate (NMDA) glutamatergic receptors on preoligodendrocytes and a rush of calcium through the voltage-gated channels. This calcium influx leads to the production of nitric oxide, oxidative stress, and subsequent mitochondrial damage and cell death. As a bivalent ion, MgSO₄ sits in the voltage-gated channels of the NMDA receptors and reduces glutamatergic signaling, thus serving as a calcium antagonist and modulating calcium influx (See Figure).

The Long Route of Research

The 1995 Nelson-Grether study compared VLBW (< 1500 g) infants who survived and developed moderate/severe cerebral palsy within 3 years to randomly selected VLBW controls with respect to whether their mothers had received MgSO₄ to prevent seizures in preeclampsia or as a tocolytic agent.⁵ In a population of more than 155,000 children born between 1983 and 1985, in utero exposure to MgSO₄ was reported in 7.1% of 42 VLBW infants with cerebral palsy and 36% of 75 VLBW controls (odds ratio [OR], 0.14; 95% CI, 0.05-0.51). In women without preeclampsia the OR increased to 0.25.

This motivating study had been preceded by several observational studies showing that infants born to women with preeclampsia who received MgSO₄ had significantly lower risks of developing intraventricular hemorrhage (IVH) and germinal matrix hemorrhage (GMH). In one of these studies, published in 1992, Karl C. Kuban, MD, and coauthors reported that “maternal receipt of magnesium sulfate was associated with diminished risk of GMH-IVH even in those babies born to mothers who apparently did not have preeclampsia.”⁹

In the several years following the 1995 Nelson-Grether study, several other case-control/observational studies were reported, with conflicting conclusions, and investigators around the world began designing and conducting needed randomized controlled trials.

The six published randomized controlled trials looking at MgSO₄ and neuroprotection varied in their inclusion and exclusion criteria, their recruitment and enrollment style, the gestational ages for MgSO₄ administration, loading and maintenance doses, how cerebral palsy or neuroprotection was assessed, and other factors (See Table for RCT characteristics and main outcomes).^10-14 One of the trials aimed primarily at evaluating the efficacy of MgSO₄ for preventing preeclampsia.

Moving Forward

The NNTs calculated in these reviews — ranging from 44 to 63 — are convincing, and are comparable with evidence-based medicine data for prevention of other common diseases.¹⁹ For instance, the NNT for a life saved when aspirin is given immediately after a heart attack is 42. Statins given for 5 years in people with known heart disease have an NNT of 83 to save one life, an NNT of 39 to prevent one nonfatal heart attack, and an NNT of 125 to prevent one stroke. For oral anticoagulants used in nonvalvular atrial fibrillation for primary stroke prevention, the NNTs to prevent one stroke, and one death, are 22 and 42, respectively.¹⁹

In its 2010 Committee Opinion on Magnesium Sulfate Before Anticipated Preterm Birth for Neuroprotection (reaffirmed in 2020), the American College of Obstetricians and Gynecologists left it to institutions to develop their own guidelines “regarding inclusion criteria, treatment regimens, concurrent tocolysis, and monitoring in accordance with one of the larger trials.”²⁰

Not surprisingly, most if not all hospitals have chosen a higher dose of MgSO₄ administered up to 31 weeks’ gestation in keeping with the protocols employed in the NICHD-sponsored BEAM trial (See Table).

The hope moving forward is to expand treatment options for neuroprotection in cases of imminent preterm birth. Researchers have been assessing the ability of melatonin to provide neuroprotection in cases of growth restriction and neonatal asphyxia. Melatonin has anti-inflammatory and antioxidant properties and is known to mediate neuronal generation and synaptic plasticity.²¹

N-acetyl-L-cysteine is another potential neuroprotective agent. It acts as an antioxidant, a precursor to glutathione, and a modulator of the glutamate system and has been studied as a neuroprotective agent in cases of maternal chorioamnionitis.²¹ Both melatonin and N-acetyl-L-cysteine are regarded as safe in pregnancy, but much more clinical study is needed to prove their neuroprotective potential when given shortly before birth or earlier.

Dr. Burd is the Sylvan Freiman, MD Endowed Professor and Chair of the department of obstetrics, gynecology, and reproductive sciences at the University of Maryland School of Medicine, Baltimore. She has no conflicts of interest.  
 

References

1. Clio Med. 1984;19(1-2):1-21.

2. Medicinsk Rev. (Bergen) 1906;32:264-272.

3. Am J Obstet Gynecol. 1996;174(4):1390-1391.

4. Am J Obstet Gynecol. 1959;78(1):27-32.

5. Pediatrics. 1995;95(2):263-269.

6. Am J Obstet Gynecol. 2009;201(3):279.e1-279.e8.

7. Am J Obstet Gynecol. 2010;202(3):292.e1-292.e9.

8. Pediatr Res. 2020;87(3):463-471.

9. J Child Neurol. 1992;7(1):70-76.

10. Lancet. 1997;350:1517-1518.

11. JAMA. 2003;290:2669-2676.

12. BJOG. 2007;114(3):310-318.

13. Lancet. 2002;359(9321):1877-1890.

14. N Engl J Med. 2008;359:895-905.

15. Obstet Gynecol. 2009;113(6):1327-1333.

16. Am J Obstet Gynecol. 2009;200(6):595-609.

17. Obstet Gynecol 2009;114:354-364.

18. Cochrane Database Syst Rev. 2009 Jan 21:(1):CD004661.

19. www.thennt.com.

20. Obstet Gynecol. 2010;115:669-671.

21. Front Synaptic Neurosci. 2012;13:680899.

*This story was corrected on June 10, 2024.

Introduction: The Many Lanes of Research on Magnesium Sulfate

The research that improves human health in the most expedient and most impactful ways is multitiered, with basic or fundamental research, translational research, interventional studies, and retrospective research often occurring simultaneously. There should be no “single lane” of research and one type of research does not preclude the other.

Too often, we fall short in one of these lanes. While we have achieved many moonshots in obstetrics and maternal-fetal medicine, we have tended not to place a high priority on basic research, which can provide a strong understanding of the biology of major diseases and conditions affecting women and their offspring. When conducted with proper commitment and funding, such research can lead to biologically directed therapy.

Within our specialty, research on how we can effectively prevent preterm birth, prematurity, and preeclampsia has taken a long road, with various types of therapies being tried, but none being overwhelmingly effective — with an ongoing need for more basic or fundamental research. Nevertheless, we can benefit and gain great insights from retrospective and interventional studies associated with clinical therapies used to treat premature labor and preeclampsia when these therapies have an unanticipated and important secondary benefit.

This month our Master Class is focused on the neuroprotection of prematurity. Magnesium sulfate is a valuable tool for the treatment of both premature labor and preeclampsia, and more recently, also for neuroprotection of the fetus. Interestingly, this use stemmed from researchers looking retrospectively at outcomes in women who received the compound for other reasons. It took many years for researchers to prove its neuroprotective value through interventional trials, while researchers simultaneously strove to understand on a basic biologic level how magnesium sulfate works to prevent outcomes such as cerebral palsy.

Basic research underway today continues to improve our understanding of its precise mechanisms of action. Combined with other tiers of research — including more interventional studies and more translational research — we can improve its utility for the neuroprotection of prematurity. Alternatively, ongoing research may lead to different, even more effective treatments.

Our guest author is Irina Burd, MD, PhD, Sylvan Freiman, MD Endowed Professor and Chair of the department of obstetrics, gynecology, and reproductive sciences at the University of Maryland School of Medicine.* Dr. Burd is also a physician-scientist. She recounts the important story of magnesium sulfate and what is currently known about its biologic plausibility in neuroprotection — including through her own studies – as well as what may be coming in the future.

E. Albert Reece, MD, PhD, MBA, a maternal-fetal medicine specialist, is dean emeritus of the University of Maryland School of Medicine, former university executive vice president; currently the endowed professor and director of the Center for Advanced Research Training and Innovation (CARTI), and senior scientist in the Center for Birth Defects Research. Dr. Reece reported no relevant disclosures. He is the medical editor of this column. Contact him at [email protected].
 

Magnesium Sulfate for Fetal Neuroprotection in Preterm Birth

Without a doubt, magnesium sulfate (MgSO₄) given before anticipated preterm birth reduces the risk of cerebral palsy. It is a valuable tool for fetal neuroprotection at a time when there are no proven alternatives. Yet without the persistent research that occurred over more than 20 years, it may not have won the endorsement of the American College of Obstetrics and Gynecologists in 2010 and worked its way into routine practice.

Its history is worthy of reflection. It took years of observational trials (not all of which showed neuroprotective effects), six randomized controlled trials (none of which met their primary endpoint), three meta-analyses, and a Cochrane Database Systematic Review to arrive at the conclusion that antenatal magnesium sulfate therapy given to women at risk of preterm birth has definitive neuroprotective benefit.

Origins and Biologic Plausibility

The MgSO₄ story is rooted in the late seventeenth century discovery by physician Nehemiah Grew that the compound was the key component of the then-famous medicinal spring waters in Epsom, England.¹ MgSO₄ was first used for eclampsia in 1906,² and was first reported in the American literature for eclampsia in 1925.³ In 1959, its effect as a tocolytic agent was reported.⁴

More than 30 years later, in 1995, an observational study coauthored by Karin B. Nelson, MD, and Judith K. Grether, PhD of the National Institutes of Health, showed a reduced risk of cerebral palsy in very-low-birth-weight infants (VLBW).⁵ The report marked a turning point in research interest on neuroprotection for anticipated preterm birth.

The precise molecular mechanisms of action of MgSO₄ for neuroprotection are still not well understood. However, research findings from the University of Maryland and other institutions have provided biologic plausibility for its use to prevent cerebral palsy. Our current thinking is that it involves the prevention of periventricular white matter injury and/or the prevention of oxidative stress and a neuronal injury mechanism called excitotoxicity.

Periventricular white matter injury involving injury to preoligodendrocytes before 32 weeks’ gestation is the most prevalent injury seen in cerebral palsy; preoligodendrocytes are precursors of myelinating oligodendrocytes, which constitute a major glial population in the white matter. Our research in a mouse model demonstrated that the intrauterine inflammation frequently associated with preterm birth can lead to neuronal injury as well as white matter damage, and that MgSO₄ may ameliorate both.^6,7

Excitotoxicity results from excessive stimulation of N-methyl-D-aspartate (NMDA) glutamatergic receptors on preoligodendrocytes and a rush of calcium through the voltage-gated channels. This calcium influx leads to the production of nitric oxide, oxidative stress, and subsequent mitochondrial damage and cell death. As a bivalent ion, MgSO₄ sits in the voltage-gated channels of the NMDA receptors and reduces glutamatergic signaling, thus serving as a calcium antagonist and modulating calcium influx (See Figure).

The Long Route of Research

The 1995 Nelson-Grether study compared VLBW (< 1500 g) infants who survived and developed moderate/severe cerebral palsy within 3 years to randomly selected VLBW controls with respect to whether their mothers had received MgSO₄ to prevent seizures in preeclampsia or as a tocolytic agent.⁵ In a population of more than 155,000 children born between 1983 and 1985, in utero exposure to MgSO₄ was reported in 7.1% of 42 VLBW infants with cerebral palsy and 36% of 75 VLBW controls (odds ratio [OR], 0.14; 95% CI, 0.05-0.51). In women without preeclampsia the OR increased to 0.25.

This motivating study had been preceded by several observational studies showing that infants born to women with preeclampsia who received MgSO₄ had significantly lower risks of developing intraventricular hemorrhage (IVH) and germinal matrix hemorrhage (GMH). In one of these studies, published in 1992, Karl C. Kuban, MD, and coauthors reported that “maternal receipt of magnesium sulfate was associated with diminished risk of GMH-IVH even in those babies born to mothers who apparently did not have preeclampsia.”⁹

In the several years following the 1995 Nelson-Grether study, several other case-control/observational studies were reported, with conflicting conclusions, and investigators around the world began designing and conducting needed randomized controlled trials.

The six published randomized controlled trials looking at MgSO₄ and neuroprotection varied in their inclusion and exclusion criteria, their recruitment and enrollment style, the gestational ages for MgSO₄ administration, loading and maintenance doses, how cerebral palsy or neuroprotection was assessed, and other factors (See Table for RCT characteristics and main outcomes).^10-14 One of the trials aimed primarily at evaluating the efficacy of MgSO₄ for preventing preeclampsia.

Moving Forward

The NNTs calculated in these reviews — ranging from 44 to 63 — are convincing, and are comparable with evidence-based medicine data for prevention of other common diseases.¹⁹ For instance, the NNT for a life saved when aspirin is given immediately after a heart attack is 42. Statins given for 5 years in people with known heart disease have an NNT of 83 to save one life, an NNT of 39 to prevent one nonfatal heart attack, and an NNT of 125 to prevent one stroke. For oral anticoagulants used in nonvalvular atrial fibrillation for primary stroke prevention, the NNTs to prevent one stroke, and one death, are 22 and 42, respectively.¹⁹

In its 2010 Committee Opinion on Magnesium Sulfate Before Anticipated Preterm Birth for Neuroprotection (reaffirmed in 2020), the American College of Obstetricians and Gynecologists left it to institutions to develop their own guidelines “regarding inclusion criteria, treatment regimens, concurrent tocolysis, and monitoring in accordance with one of the larger trials.”²⁰

Not surprisingly, most if not all hospitals have chosen a higher dose of MgSO₄ administered up to 31 weeks’ gestation in keeping with the protocols employed in the NICHD-sponsored BEAM trial (See Table).

The hope moving forward is to expand treatment options for neuroprotection in cases of imminent preterm birth. Researchers have been assessing the ability of melatonin to provide neuroprotection in cases of growth restriction and neonatal asphyxia. Melatonin has anti-inflammatory and antioxidant properties and is known to mediate neuronal generation and synaptic plasticity.²¹

N-acetyl-L-cysteine is another potential neuroprotective agent. It acts as an antioxidant, a precursor to glutathione, and a modulator of the glutamate system and has been studied as a neuroprotective agent in cases of maternal chorioamnionitis.²¹ Both melatonin and N-acetyl-L-cysteine are regarded as safe in pregnancy, but much more clinical study is needed to prove their neuroprotective potential when given shortly before birth or earlier.

Dr. Burd is the Sylvan Freiman, MD Endowed Professor and Chair of the department of obstetrics, gynecology, and reproductive sciences at the University of Maryland School of Medicine, Baltimore. She has no conflicts of interest.  
 

References

1. Clio Med. 1984;19(1-2):1-21.

2. Medicinsk Rev. (Bergen) 1906;32:264-272.

3. Am J Obstet Gynecol. 1996;174(4):1390-1391.

4. Am J Obstet Gynecol. 1959;78(1):27-32.

5. Pediatrics. 1995;95(2):263-269.

6. Am J Obstet Gynecol. 2009;201(3):279.e1-279.e8.

7. Am J Obstet Gynecol. 2010;202(3):292.e1-292.e9.

8. Pediatr Res. 2020;87(3):463-471.

9. J Child Neurol. 1992;7(1):70-76.

10. Lancet. 1997;350:1517-1518.

11. JAMA. 2003;290:2669-2676.

12. BJOG. 2007;114(3):310-318.

13. Lancet. 2002;359(9321):1877-1890.

14. N Engl J Med. 2008;359:895-905.

15. Obstet Gynecol. 2009;113(6):1327-1333.

16. Am J Obstet Gynecol. 2009;200(6):595-609.

17. Obstet Gynecol 2009;114:354-364.

18. Cochrane Database Syst Rev. 2009 Jan 21:(1):CD004661.

19. www.thennt.com.

20. Obstet Gynecol. 2010;115:669-671.

21. Front Synaptic Neurosci. 2012;13:680899.

*This story was corrected on June 10, 2024.

To assess thyroid function, clinicians typically determine blood levels of thyroid-stimulating hormone (TSH) and thyroxine (T4) and do not directly measure triiodothyronine (T3).

However, findings from a large observational study of a US sample of adults with normal thyroid function suggested that subclinical variation in the hypothalamic-pituitary-thyroid (HPT)–axis effector hormone T3 “is an important and overlooked factor linking socioeconomic forces, human biology, and aging,” researchers reported.

The study, with lead author Ralph I. Lawton, an MD-PhD student at Harvard Medical School, Boston, was published online on January 4, 2024, in Proceedings of the National Academy of Sciences. In this national sample of healthy adults older than 20, free T3 was negatively related to household income. At age 40 and older, free T3 was significantly linked to being employed. Among adults from age 51 to 80, free T3 levels were inversely related to mortality.

“It is important to note that the more typically measured biomarkers for thyroid function (T4 and TSH) are poorly linked to free T3 levels,” Dr. Lawton and colleagues wrote.

The ratio of TSH:T4 explained only 1.7% of variation in T3 levels, they noted, which suggested that TSH and T4 may not be accurate surrogates of free T3. Thus, “direct measurement of free T3 is likely vital to properly stratify the effects of HPT-axis variation,” they maintained. “Improved methods for measurement [of T3] and further investigation of the role of free T3 in clinical conditions may be high yield,” according to the researchers.

Further studies of the relationship between the action of deiodinase in converting T4 to T3 and social forces and aging could elucidate critical biology. “New therapeutics targeting T3/T4 ratios,” they suggested, “may be more beneficial for a significant cohort of older individuals [with hypothyroidism] currently treated with levothyroxine [(LT4)].”
 

‘Cherry on Top’

“I think this is a really important paper,” thyroidology expert Antonio Bianco, MD, PhD, professor of medicine, The University of Chicago, who was not involved with this research, told this news organization.

His research group and others “have slowly been providing evidence of the relevance of measuring T3 levels,” he said. “This paper is sort of a cherry on top. It is really the most recent strong evidence that looking at T3 levels in plasma is really important. We need to do a better job at developing a much more precise assay for T3,” he said, “because now we know T3 is a very important parameter that endocrinologists should be looking for. We know that about 20 million Americans have hypothyroidism, and are being treated with T4 (levothyroxine),” Dr. Bianco continued.

“As endocrinologists, we believe that if you treat someone with levothyroxine, you normalize T3 levels. However, many times, with standard of care with levothyroxine, T3 levels are not normalized.”
 

Larger Variations in T3

Thyroid hormones (TSH, free T4, and free T3) influence many aspects of human physiology and behavior, but it is not known how variations in these levels in a population free of thyroid disease are associated with mortality and socioeconomic factors.

The researchers analyzed data from 7626 adults over age 20 up to age 80 who participated in the National Health and Nutrition Examination Survey during 2007-2012 and had blood tests to determine TSH, free T4, and free T3 and were not being actively treated for thyroid conditions. Among the 3603 older adults (over age 50), there were 981 deaths up until the end of 2019. TSH levels were not linked to mortality, but increasing levels of free T3 and decreasing levels of free T4 were protective for mortality (hazard ratios, 0.88 and 1.26, respectively; P < .01).

There was a robust negative relationship between household income and employment and free T3 but no relationship between these factors and T4. There was a much larger variation across age in levels of free T3 than in levels of TSH or free T4. Free T4 and free T3 diverged at older ages, when free T4 increased and free T3 continually decreased.

Older adults with symptoms of hypothyroidism may have high free T4 levels despite low free T3, the researchers noted.

“In a nonclinical sample representative of the US population,” they summarized, “we find that free T3 is much more strongly related to all domains studied — age, sex, seasonality, household income, employment, and longevity — than the other molecules of the HPT axis.”

This work was supported by the Burroughs Wellcome Fund Career at Scientific Interface award, a Brain and Behavior Research Foundation young investigator award, the Howard Hughes Medical Institute, the National Institute of Aging, and the National Institute of General Medical Sciences. Dr. Bianco served as a consultant for AbbVie, Avion Pharmaceuticals, Synthonics, Synthion, and Thyron and recently published the book Rethinking Hypothyroidism: Why Treatment Must Change and What Patients Can Do.
 

A version of this article appeared on Medscape.com.

To assess thyroid function, clinicians typically determine blood levels of thyroid-stimulating hormone (TSH) and thyroxine (T4) and do not directly measure triiodothyronine (T3).

However, findings from a large observational study of a US sample of adults with normal thyroid function suggested that subclinical variation in the hypothalamic-pituitary-thyroid (HPT)–axis effector hormone T3 “is an important and overlooked factor linking socioeconomic forces, human biology, and aging,” researchers reported.

The study, with lead author Ralph I. Lawton, an MD-PhD student at Harvard Medical School, Boston, was published online on January 4, 2024, in Proceedings of the National Academy of Sciences. In this national sample of healthy adults older than 20, free T3 was negatively related to household income. At age 40 and older, free T3 was significantly linked to being employed. Among adults from age 51 to 80, free T3 levels were inversely related to mortality.

“It is important to note that the more typically measured biomarkers for thyroid function (T4 and TSH) are poorly linked to free T3 levels,” Dr. Lawton and colleagues wrote.

The ratio of TSH:T4 explained only 1.7% of variation in T3 levels, they noted, which suggested that TSH and T4 may not be accurate surrogates of free T3. Thus, “direct measurement of free T3 is likely vital to properly stratify the effects of HPT-axis variation,” they maintained. “Improved methods for measurement [of T3] and further investigation of the role of free T3 in clinical conditions may be high yield,” according to the researchers.

Further studies of the relationship between the action of deiodinase in converting T4 to T3 and social forces and aging could elucidate critical biology. “New therapeutics targeting T3/T4 ratios,” they suggested, “may be more beneficial for a significant cohort of older individuals [with hypothyroidism] currently treated with levothyroxine [(LT4)].”
 

‘Cherry on Top’

“I think this is a really important paper,” thyroidology expert Antonio Bianco, MD, PhD, professor of medicine, The University of Chicago, who was not involved with this research, told this news organization.

His research group and others “have slowly been providing evidence of the relevance of measuring T3 levels,” he said. “This paper is sort of a cherry on top. It is really the most recent strong evidence that looking at T3 levels in plasma is really important. We need to do a better job at developing a much more precise assay for T3,” he said, “because now we know T3 is a very important parameter that endocrinologists should be looking for. We know that about 20 million Americans have hypothyroidism, and are being treated with T4 (levothyroxine),” Dr. Bianco continued.

“As endocrinologists, we believe that if you treat someone with levothyroxine, you normalize T3 levels. However, many times, with standard of care with levothyroxine, T3 levels are not normalized.”
 

Larger Variations in T3

Thyroid hormones (TSH, free T4, and free T3) influence many aspects of human physiology and behavior, but it is not known how variations in these levels in a population free of thyroid disease are associated with mortality and socioeconomic factors.

The researchers analyzed data from 7626 adults over age 20 up to age 80 who participated in the National Health and Nutrition Examination Survey during 2007-2012 and had blood tests to determine TSH, free T4, and free T3 and were not being actively treated for thyroid conditions. Among the 3603 older adults (over age 50), there were 981 deaths up until the end of 2019. TSH levels were not linked to mortality, but increasing levels of free T3 and decreasing levels of free T4 were protective for mortality (hazard ratios, 0.88 and 1.26, respectively; P < .01).

There was a robust negative relationship between household income and employment and free T3 but no relationship between these factors and T4. There was a much larger variation across age in levels of free T3 than in levels of TSH or free T4. Free T4 and free T3 diverged at older ages, when free T4 increased and free T3 continually decreased.

Older adults with symptoms of hypothyroidism may have high free T4 levels despite low free T3, the researchers noted.

“In a nonclinical sample representative of the US population,” they summarized, “we find that free T3 is much more strongly related to all domains studied — age, sex, seasonality, household income, employment, and longevity — than the other molecules of the HPT axis.”

This work was supported by the Burroughs Wellcome Fund Career at Scientific Interface award, a Brain and Behavior Research Foundation young investigator award, the Howard Hughes Medical Institute, the National Institute of Aging, and the National Institute of General Medical Sciences. Dr. Bianco served as a consultant for AbbVie, Avion Pharmaceuticals, Synthonics, Synthion, and Thyron and recently published the book Rethinking Hypothyroidism: Why Treatment Must Change and What Patients Can Do.
 

A version of this article appeared on Medscape.com.

To assess thyroid function, clinicians typically determine blood levels of thyroid-stimulating hormone (TSH) and thyroxine (T4) and do not directly measure triiodothyronine (T3).

However, findings from a large observational study of a US sample of adults with normal thyroid function suggested that subclinical variation in the hypothalamic-pituitary-thyroid (HPT)–axis effector hormone T3 “is an important and overlooked factor linking socioeconomic forces, human biology, and aging,” researchers reported.

The study, with lead author Ralph I. Lawton, an MD-PhD student at Harvard Medical School, Boston, was published online on January 4, 2024, in Proceedings of the National Academy of Sciences. In this national sample of healthy adults older than 20, free T3 was negatively related to household income. At age 40 and older, free T3 was significantly linked to being employed. Among adults from age 51 to 80, free T3 levels were inversely related to mortality.

“It is important to note that the more typically measured biomarkers for thyroid function (T4 and TSH) are poorly linked to free T3 levels,” Dr. Lawton and colleagues wrote.

The ratio of TSH:T4 explained only 1.7% of variation in T3 levels, they noted, which suggested that TSH and T4 may not be accurate surrogates of free T3. Thus, “direct measurement of free T3 is likely vital to properly stratify the effects of HPT-axis variation,” they maintained. “Improved methods for measurement [of T3] and further investigation of the role of free T3 in clinical conditions may be high yield,” according to the researchers.

Further studies of the relationship between the action of deiodinase in converting T4 to T3 and social forces and aging could elucidate critical biology. “New therapeutics targeting T3/T4 ratios,” they suggested, “may be more beneficial for a significant cohort of older individuals [with hypothyroidism] currently treated with levothyroxine [(LT4)].”
 

‘Cherry on Top’

“I think this is a really important paper,” thyroidology expert Antonio Bianco, MD, PhD, professor of medicine, The University of Chicago, who was not involved with this research, told this news organization.

His research group and others “have slowly been providing evidence of the relevance of measuring T3 levels,” he said. “This paper is sort of a cherry on top. It is really the most recent strong evidence that looking at T3 levels in plasma is really important. We need to do a better job at developing a much more precise assay for T3,” he said, “because now we know T3 is a very important parameter that endocrinologists should be looking for. We know that about 20 million Americans have hypothyroidism, and are being treated with T4 (levothyroxine),” Dr. Bianco continued.

“As endocrinologists, we believe that if you treat someone with levothyroxine, you normalize T3 levels. However, many times, with standard of care with levothyroxine, T3 levels are not normalized.”
 

Larger Variations in T3

Thyroid hormones (TSH, free T4, and free T3) influence many aspects of human physiology and behavior, but it is not known how variations in these levels in a population free of thyroid disease are associated with mortality and socioeconomic factors.

The researchers analyzed data from 7626 adults over age 20 up to age 80 who participated in the National Health and Nutrition Examination Survey during 2007-2012 and had blood tests to determine TSH, free T4, and free T3 and were not being actively treated for thyroid conditions. Among the 3603 older adults (over age 50), there were 981 deaths up until the end of 2019. TSH levels were not linked to mortality, but increasing levels of free T3 and decreasing levels of free T4 were protective for mortality (hazard ratios, 0.88 and 1.26, respectively; P < .01).

There was a robust negative relationship between household income and employment and free T3 but no relationship between these factors and T4. There was a much larger variation across age in levels of free T3 than in levels of TSH or free T4. Free T4 and free T3 diverged at older ages, when free T4 increased and free T3 continually decreased.

Older adults with symptoms of hypothyroidism may have high free T4 levels despite low free T3, the researchers noted.

“In a nonclinical sample representative of the US population,” they summarized, “we find that free T3 is much more strongly related to all domains studied — age, sex, seasonality, household income, employment, and longevity — than the other molecules of the HPT axis.”

This work was supported by the Burroughs Wellcome Fund Career at Scientific Interface award, a Brain and Behavior Research Foundation young investigator award, the Howard Hughes Medical Institute, the National Institute of Aging, and the National Institute of General Medical Sciences. Dr. Bianco served as a consultant for AbbVie, Avion Pharmaceuticals, Synthonics, Synthion, and Thyron and recently published the book Rethinking Hypothyroidism: Why Treatment Must Change and What Patients Can Do.
 

A version of this article appeared on Medscape.com.

Unnecessary or incorrect use of topical antifungal medications is driving the spread of fungal infections like ringworm, which are becoming more difficult to treat, according to a January 11 study published in Morbidity and Mortality Weekly Report. 

If a patient’s condition is not caused by a fungus but is treated as such, treatment will be ineffective.

The authors strongly advise primary care clinicians to confirm ringworm diagnoses through lab testing before prescribing treatments such as clotrimazole or combinations of antifungals and corticosteroids. And because many topical treatments are also available over-the-counter, doctors should advise patients about how to use them correctly.

“In the last few years, there have been many antifungal resistant cases of tinea corporisand onychomycosisreported,” or ringworm and finger or toenail infections, respectively, said Shari Lipner, MD, PhD, a dermatologist at Weill Cornell Medicine in New York, and an author of the study.

Many of these cases originated in South Asia and have also been reported in Europe and Canada. In 2023, the first cases of a new strain of antifungal-resistant ringworm were reported in the United States. This species, Trichophyton indotineae, does not respond to topical medications, requiring oral treatment instead.

“It’s really a serious problem and a huge public health concern,” Dr. Lipner said. 

For the new study, Dr. Lipner and colleagues examined prescription patterns from 2021 Medicare Part D claims of topical antifungals. They report that 6.5 million topical antifungal prescriptions were filled that year, some of which included steroids in the formulation. Primary care clinicians wrote 40% of these prescriptions, the most for any clinician group. The estimate is almost certainly an undercount of topical antifungal use because the database did not include over-the-counter purchases or data from other insurance payers.

The number of prescriptions equate to 1 in every 8 Medicare Part D beneficiary receiving an antifungal, the researchers reported. 

“If I think about the patients that come into my office, I’m certainly not giving an antifungal to 1 in 8 of them, and I see a lot of fungal infections,” Dr. Lipner said. The findings suggest to Dr. Lipner that some clinicians are diagnosing ringworm by eyesight alone rather than confirming the diagnosis with techniques such as microscopy, fungal culture testing, or polymerase chain reaction testing. 

Sometimes what looks like ringworm may actually be eczema, in which case, the topical antifungal would not be appropriate, according to Avrom Caplan, MD, a dermatologist at NYU Langone Health in New York.

“If you’re prescribing something to somebody that they don’t need, you’re basically exposing them to the side effects without the benefit,” Dr. Caplan, who was not part of the study, said. 

Dr. Caplan, who reported the first cases of ringworm that only responded to oral medications in the United States, stressed that topical treatments work fine for many ringworm cases today. But if indiscriminate prescribing spurs the development of more resilient fungi, more situations may arise in which only oral medications work in the future, Dr. Caplan said. In addition, oral medications are inherently more demanding on a patient than something they can rub on their skin, Dr. Caplan added.

“We hope that physicians will really think hard about this study and change their practices if they’re not confirming the diagnosis,” Dr. Lipner said.

Dr. Lipner and Dr. Caplan report no relevant financial relationships.

A version of this article appeared on Medscape.com.

Unnecessary or incorrect use of topical antifungal medications is driving the spread of fungal infections like ringworm, which are becoming more difficult to treat, according to a January 11 study published in Morbidity and Mortality Weekly Report. 

If a patient’s condition is not caused by a fungus but is treated as such, treatment will be ineffective.

The authors strongly advise primary care clinicians to confirm ringworm diagnoses through lab testing before prescribing treatments such as clotrimazole or combinations of antifungals and corticosteroids. And because many topical treatments are also available over-the-counter, doctors should advise patients about how to use them correctly.

“In the last few years, there have been many antifungal resistant cases of tinea corporisand onychomycosisreported,” or ringworm and finger or toenail infections, respectively, said Shari Lipner, MD, PhD, a dermatologist at Weill Cornell Medicine in New York, and an author of the study.

Many of these cases originated in South Asia and have also been reported in Europe and Canada. In 2023, the first cases of a new strain of antifungal-resistant ringworm were reported in the United States. This species, Trichophyton indotineae, does not respond to topical medications, requiring oral treatment instead.

“It’s really a serious problem and a huge public health concern,” Dr. Lipner said. 

For the new study, Dr. Lipner and colleagues examined prescription patterns from 2021 Medicare Part D claims of topical antifungals. They report that 6.5 million topical antifungal prescriptions were filled that year, some of which included steroids in the formulation. Primary care clinicians wrote 40% of these prescriptions, the most for any clinician group. The estimate is almost certainly an undercount of topical antifungal use because the database did not include over-the-counter purchases or data from other insurance payers.

The number of prescriptions equate to 1 in every 8 Medicare Part D beneficiary receiving an antifungal, the researchers reported. 

“If I think about the patients that come into my office, I’m certainly not giving an antifungal to 1 in 8 of them, and I see a lot of fungal infections,” Dr. Lipner said. The findings suggest to Dr. Lipner that some clinicians are diagnosing ringworm by eyesight alone rather than confirming the diagnosis with techniques such as microscopy, fungal culture testing, or polymerase chain reaction testing. 

Sometimes what looks like ringworm may actually be eczema, in which case, the topical antifungal would not be appropriate, according to Avrom Caplan, MD, a dermatologist at NYU Langone Health in New York.

“If you’re prescribing something to somebody that they don’t need, you’re basically exposing them to the side effects without the benefit,” Dr. Caplan, who was not part of the study, said. 

Dr. Caplan, who reported the first cases of ringworm that only responded to oral medications in the United States, stressed that topical treatments work fine for many ringworm cases today. But if indiscriminate prescribing spurs the development of more resilient fungi, more situations may arise in which only oral medications work in the future, Dr. Caplan said. In addition, oral medications are inherently more demanding on a patient than something they can rub on their skin, Dr. Caplan added.

“We hope that physicians will really think hard about this study and change their practices if they’re not confirming the diagnosis,” Dr. Lipner said.

Dr. Lipner and Dr. Caplan report no relevant financial relationships.

A version of this article appeared on Medscape.com.

Unnecessary or incorrect use of topical antifungal medications is driving the spread of fungal infections like ringworm, which are becoming more difficult to treat, according to a January 11 study published in Morbidity and Mortality Weekly Report. 

If a patient’s condition is not caused by a fungus but is treated as such, treatment will be ineffective.

The authors strongly advise primary care clinicians to confirm ringworm diagnoses through lab testing before prescribing treatments such as clotrimazole or combinations of antifungals and corticosteroids. And because many topical treatments are also available over-the-counter, doctors should advise patients about how to use them correctly.

“In the last few years, there have been many antifungal resistant cases of tinea corporisand onychomycosisreported,” or ringworm and finger or toenail infections, respectively, said Shari Lipner, MD, PhD, a dermatologist at Weill Cornell Medicine in New York, and an author of the study.

Many of these cases originated in South Asia and have also been reported in Europe and Canada. In 2023, the first cases of a new strain of antifungal-resistant ringworm were reported in the United States. This species, Trichophyton indotineae, does not respond to topical medications, requiring oral treatment instead.

“It’s really a serious problem and a huge public health concern,” Dr. Lipner said. 

For the new study, Dr. Lipner and colleagues examined prescription patterns from 2021 Medicare Part D claims of topical antifungals. They report that 6.5 million topical antifungal prescriptions were filled that year, some of which included steroids in the formulation. Primary care clinicians wrote 40% of these prescriptions, the most for any clinician group. The estimate is almost certainly an undercount of topical antifungal use because the database did not include over-the-counter purchases or data from other insurance payers.

The number of prescriptions equate to 1 in every 8 Medicare Part D beneficiary receiving an antifungal, the researchers reported. 

“If I think about the patients that come into my office, I’m certainly not giving an antifungal to 1 in 8 of them, and I see a lot of fungal infections,” Dr. Lipner said. The findings suggest to Dr. Lipner that some clinicians are diagnosing ringworm by eyesight alone rather than confirming the diagnosis with techniques such as microscopy, fungal culture testing, or polymerase chain reaction testing. 

Sometimes what looks like ringworm may actually be eczema, in which case, the topical antifungal would not be appropriate, according to Avrom Caplan, MD, a dermatologist at NYU Langone Health in New York.

“If you’re prescribing something to somebody that they don’t need, you’re basically exposing them to the side effects without the benefit,” Dr. Caplan, who was not part of the study, said. 

Dr. Caplan, who reported the first cases of ringworm that only responded to oral medications in the United States, stressed that topical treatments work fine for many ringworm cases today. But if indiscriminate prescribing spurs the development of more resilient fungi, more situations may arise in which only oral medications work in the future, Dr. Caplan said. In addition, oral medications are inherently more demanding on a patient than something they can rub on their skin, Dr. Caplan added.

“We hope that physicians will really think hard about this study and change their practices if they’re not confirming the diagnosis,” Dr. Lipner said.

Dr. Lipner and Dr. Caplan report no relevant financial relationships.

A version of this article appeared on Medscape.com.