TBD Meeting (3177-20)

It’s important for clinicians to ask women whether they are experiencing symptoms of genitourinary syndrome of menopause (GSM) before and after menopause, according to a new statement from the North American Menopause Society.

Stephanie Faubion, MD, MBA, medical director of NAMS, presented the updated statement at the virtual annual meeting of the North American Menopause Society.

“The one thing we tried to emphasize is proactive counseling and proactive inquiry, educating women when they hit perimenopause that this is a thing and that there are treatments,” Dr. Faubion said in an interview.

“I think women sometimes think there’s nothing they can do, which is not true. There’s the misperception that it’s just part of getting old, which it’s not,” said Dr. Faubion, who is also director of the Mayo Clinic Center for Women’s Health in Rochester, Minn., and chair of the department of medicine at the Mayo Clinic in Jacksonville, Fla.
 

Changes from previous statement

The GSM statement describes the symptoms and signs resulting from estrogen deficiency on the genitourinary tract, Dr. Faubion explained. The biggest change from the earlier version, published in 2013, is the condition’s new name. Formerly known as vulvovaginal atrophy, the condition’s new term was developed in 2014 and is now preferred by NAMS and the American College of Obstetricians and Gynecologists because it’s more comprehensive. Rather than just a physical description of the condition, GSM encompasses the many related symptoms and the urinary tract changes that occur, and it clearly associates the condition with menopause.

“Women don’t always associate these changes with menopause and don’t recognize that there’s something that can be done about it,” Dr. Faubion said. “We like to emphasize that sex should never be painful, but it’s not just about sex. It’s about comfort.”

Other changes include a review of evidence related to vaginal laser therapy for GSM and the availability of Imvexxy vaginal inserts with lower doses (4 mcg and 10 mpg) of estrogen.
 

Etiology and diagnosis of GSM

The presence of endogenous estrogen keeps the vaginal lining thick, rugated, well vascularized, and lubricated. As estrogen levels decline during postmenopause, the epithelial lining becomes thinner, with reduced blood supply and loss of glycogen.

The most common symptoms of GSM include irritation of the vulva, inadequate vaginal lubrication, burning, dysuria, dyspareunia, and vaginal discharge, but the symptoms may not always correlate with physical findings. In women with surgical menopause, the symptoms tend to be more severe. The most distressing symptoms to women are often those that affect sexual function.

“Clinicians must be proactive in asking menopausal women if GSM symptoms are present, even before menopause begins,” Dr. Faubion said.

Taking a women’s history during evaluation may help identify contributing factors, other causes, or potentially effective treatments based on what has worked in the past. History should include a description of symptoms, their onset and duration, how distressing they are, and their effect on the woman’s quality of life. A sexual history, such as lubricants the woman has used, can also be useful in determining management strategies.

Signs of GSM include labial atrophy, vaginal dryness, introital stenosis, clitoral atrophy, phimosis of the prepuce, reduced mons pubis and labia majora bulk, reduced labia minora tissue and pigmentation, and changes in the urethra, including erythema of the urethral meatus and commonly a urethral caruncle, a benign outgrown of inflammatory tissue that likely results from low estrogen levels and can be treated effectively with topical hormonal therapies.

A diagnosis of GSM requires both physical findings and bothersome symptoms, though not necessarily specific vaginal maturation index or vaginal pH values. The differential diagnosis speaks to the importance of taking a good history: allergic or inflammatory conditions, infection, trauma, presence of a foreign body, malignancy, vulvodynia, chronic pelvic pain, or provoked pelvic floor hypertonia.

If first-line therapies of over-the-counter lubricants do not sufficiently treat GSM, other effective treatments include low-dose vaginal estrogen therapy, systemic estrogen therapy if other menopause symptoms are present, vaginal dehydroepiandrosterone (DHEA), and ospemifene.
 

Management of GSM

First-line therapy of GSM involves over-the-counter lubricants and moisturizers, which are often adequate to alleviate or eliminate women’s symptoms. However, the panel that developed the statement found no evidence that hyaluronic acid was any more effective than other lubricants or moisturizers, and no herbal products were found to effectively treat GSM.

While emerging evidence suggests that energy-based therapies, such as treatments with vaginal laser or radiofrequency devices, show some promise, more evidence is needed to show safety and efficacy before the panel can recommend routine use.

When over-the-counter therapies are not effective, vaginal estrogen usually relieves GSM with little absorption and is preferred over systemic therapy if GSM is the only bothersome menopausal symptom. Options include topical creams, a slow-release estradiol intravaginal ring, and estradiol vaginal tablets and inserts.

“However, when systemic hormone therapy is needed to treat other menopause symptoms, usually a woman will derive benefit and resolution of the GSM at the same time,” Dr. Faubion said. “However, for some women, additional low-dose vaginal estrogen may be added to systemic estrogen if needed, and that could include vaginal DHEA.”

All the approved vaginal products have shown efficacy, compared with placebo in clinical trials, and a Cochrane review comparing the different therapies found them to be similarly efficacious in treating vaginal dryness and dyspareunia with no significant differences in adverse events.
 

Preparing patients for the boxed warning

As vaginal estrogen doses are significantly lower than systemic estrogen, their safety profile is better, with serum estrogen levels remaining within the postmenopausal range when low-dose vaginal estrogen therapy is used. That said, some studies have shown that vaginal estrogen cream can be a large enough dose to involve systemic absorption and lead to symptoms such as vaginal bleeding, breast pain, and nausea.

However, package inserts for vaginal estrogen have the same boxed warning as seen in systemic hormone therapy inserts regarding risk of endometrial cancer, breast cancer, cardiovascular disorders, and “probable dementia” despite these conditions not being linked to vaginal estrogen in trials. Neither has venous thromboembolism been linked to vaginal estrogen.

“The panel felt it was very important that women be educated about the differences between low-dose vaginal estrogen and systemic estrogen therapy and be prepared for this boxed warning,” Dr. Faubion told attendees. “It’s really important to say: ‘You’re going to get this, it’s going to look scary, and there’s no evidence these same warnings apply to the low-dose vaginal estrogen products.’ ”

This point particularly resonated with NAMS attendee Juliana (Jewel) Kling, MD, MPH, an associate professor of medicine at the Mayo Clinic Arizona, Scottsdale.

“The point about educating women about the differences between low-dose vaginal estrogen products and systemic treatments and being prepared for the boxed warning is important and I hope reaches many practitioners,” Dr. Kling said in an interview.

The panel did not recommend using progestogen with low-dose vaginal estrogen therapy or doing routine endometrial surveillance in women using vaginal estrogen. But endometrial surveillance may be worth considering in women with increased risk of endometrial cancer.

Estrogen insufficiency from premature menopause or primary ovarian insufficiency is linked to more severe sexual dysfunction, which can be particularly upsetting for younger women with vaginal atrophy and dyspareunia. A meta-analysis showed that vaginal estrogen appeared to slightly outperform over-the-counter lubricants in bringing back sexual function.

Undiagnosed vaginal or uterine bleeding is a contraindication for vaginal estrogen until the cause has been determined, and providers should use caution in prescribing vaginal estrogen to women with estrogen-dependent neoplasia. Dr. Faubion noted that GSM is common in women with breast cancer, especially if they are receiving endocrine treatments or aromatase inhibitors.

“For women with a hormone-dependent cancer, GSM management depends on each woman’s preference in consultants with her oncologist,” she said. GSM management in women with a nonhormone-dependent cancer, however, is no different than in women without cancer.

DHEA is a steroid that effectively improves vaginal maturation index, vaginal pH, dyspareunia, and vaginal dryness. The most common side effect is vaginal discharge.

Ospemifene, an estrogen agonist available in the United States but not in Canada, is the only oral product approved to treat vaginal dryness and dyspareunia. An observational study also found it effective in reducing recurrent UTIs. The most common side effect is vasomotor symptoms, and it should not be used in patients with breast cancer because it hasn’t been studied in this population.

“This updated information and position statement was needed and will be very clinically relevant in treating midlife women,” Dr. Kling said in an interview. “Dr. Faubion presented a high-level overview of the position statement with clinically relevant points, including treatment for sexual dysfunction related to GSM, GSM treatment in cancer patients, and emphasized the efficacy and low-risk safety profile of low-dose vaginal estrogen, compared to systemic [hormone therapy], for treatment of GSM.”

Dr. Faubion and Dr. Kling disclosed no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

It’s important for clinicians to ask women whether they are experiencing symptoms of genitourinary syndrome of menopause (GSM) before and after menopause, according to a new statement from the North American Menopause Society.

Stephanie Faubion, MD, MBA, medical director of NAMS, presented the updated statement at the virtual annual meeting of the North American Menopause Society.

“The one thing we tried to emphasize is proactive counseling and proactive inquiry, educating women when they hit perimenopause that this is a thing and that there are treatments,” Dr. Faubion said in an interview.

“I think women sometimes think there’s nothing they can do, which is not true. There’s the misperception that it’s just part of getting old, which it’s not,” said Dr. Faubion, who is also director of the Mayo Clinic Center for Women’s Health in Rochester, Minn., and chair of the department of medicine at the Mayo Clinic in Jacksonville, Fla.
 

Changes from previous statement

The GSM statement describes the symptoms and signs resulting from estrogen deficiency on the genitourinary tract, Dr. Faubion explained. The biggest change from the earlier version, published in 2013, is the condition’s new name. Formerly known as vulvovaginal atrophy, the condition’s new term was developed in 2014 and is now preferred by NAMS and the American College of Obstetricians and Gynecologists because it’s more comprehensive. Rather than just a physical description of the condition, GSM encompasses the many related symptoms and the urinary tract changes that occur, and it clearly associates the condition with menopause.

“Women don’t always associate these changes with menopause and don’t recognize that there’s something that can be done about it,” Dr. Faubion said. “We like to emphasize that sex should never be painful, but it’s not just about sex. It’s about comfort.”

Other changes include a review of evidence related to vaginal laser therapy for GSM and the availability of Imvexxy vaginal inserts with lower doses (4 mcg and 10 mpg) of estrogen.
 

Etiology and diagnosis of GSM

The presence of endogenous estrogen keeps the vaginal lining thick, rugated, well vascularized, and lubricated. As estrogen levels decline during postmenopause, the epithelial lining becomes thinner, with reduced blood supply and loss of glycogen.

The most common symptoms of GSM include irritation of the vulva, inadequate vaginal lubrication, burning, dysuria, dyspareunia, and vaginal discharge, but the symptoms may not always correlate with physical findings. In women with surgical menopause, the symptoms tend to be more severe. The most distressing symptoms to women are often those that affect sexual function.

“Clinicians must be proactive in asking menopausal women if GSM symptoms are present, even before menopause begins,” Dr. Faubion said.

Taking a women’s history during evaluation may help identify contributing factors, other causes, or potentially effective treatments based on what has worked in the past. History should include a description of symptoms, their onset and duration, how distressing they are, and their effect on the woman’s quality of life. A sexual history, such as lubricants the woman has used, can also be useful in determining management strategies.

Signs of GSM include labial atrophy, vaginal dryness, introital stenosis, clitoral atrophy, phimosis of the prepuce, reduced mons pubis and labia majora bulk, reduced labia minora tissue and pigmentation, and changes in the urethra, including erythema of the urethral meatus and commonly a urethral caruncle, a benign outgrown of inflammatory tissue that likely results from low estrogen levels and can be treated effectively with topical hormonal therapies.

A diagnosis of GSM requires both physical findings and bothersome symptoms, though not necessarily specific vaginal maturation index or vaginal pH values. The differential diagnosis speaks to the importance of taking a good history: allergic or inflammatory conditions, infection, trauma, presence of a foreign body, malignancy, vulvodynia, chronic pelvic pain, or provoked pelvic floor hypertonia.

If first-line therapies of over-the-counter lubricants do not sufficiently treat GSM, other effective treatments include low-dose vaginal estrogen therapy, systemic estrogen therapy if other menopause symptoms are present, vaginal dehydroepiandrosterone (DHEA), and ospemifene.
 

Management of GSM

First-line therapy of GSM involves over-the-counter lubricants and moisturizers, which are often adequate to alleviate or eliminate women’s symptoms. However, the panel that developed the statement found no evidence that hyaluronic acid was any more effective than other lubricants or moisturizers, and no herbal products were found to effectively treat GSM.

While emerging evidence suggests that energy-based therapies, such as treatments with vaginal laser or radiofrequency devices, show some promise, more evidence is needed to show safety and efficacy before the panel can recommend routine use.

When over-the-counter therapies are not effective, vaginal estrogen usually relieves GSM with little absorption and is preferred over systemic therapy if GSM is the only bothersome menopausal symptom. Options include topical creams, a slow-release estradiol intravaginal ring, and estradiol vaginal tablets and inserts.

“However, when systemic hormone therapy is needed to treat other menopause symptoms, usually a woman will derive benefit and resolution of the GSM at the same time,” Dr. Faubion said. “However, for some women, additional low-dose vaginal estrogen may be added to systemic estrogen if needed, and that could include vaginal DHEA.”

All the approved vaginal products have shown efficacy, compared with placebo in clinical trials, and a Cochrane review comparing the different therapies found them to be similarly efficacious in treating vaginal dryness and dyspareunia with no significant differences in adverse events.
 

Preparing patients for the boxed warning

As vaginal estrogen doses are significantly lower than systemic estrogen, their safety profile is better, with serum estrogen levels remaining within the postmenopausal range when low-dose vaginal estrogen therapy is used. That said, some studies have shown that vaginal estrogen cream can be a large enough dose to involve systemic absorption and lead to symptoms such as vaginal bleeding, breast pain, and nausea.

However, package inserts for vaginal estrogen have the same boxed warning as seen in systemic hormone therapy inserts regarding risk of endometrial cancer, breast cancer, cardiovascular disorders, and “probable dementia” despite these conditions not being linked to vaginal estrogen in trials. Neither has venous thromboembolism been linked to vaginal estrogen.

“The panel felt it was very important that women be educated about the differences between low-dose vaginal estrogen and systemic estrogen therapy and be prepared for this boxed warning,” Dr. Faubion told attendees. “It’s really important to say: ‘You’re going to get this, it’s going to look scary, and there’s no evidence these same warnings apply to the low-dose vaginal estrogen products.’ ”

This point particularly resonated with NAMS attendee Juliana (Jewel) Kling, MD, MPH, an associate professor of medicine at the Mayo Clinic Arizona, Scottsdale.

“The point about educating women about the differences between low-dose vaginal estrogen products and systemic treatments and being prepared for the boxed warning is important and I hope reaches many practitioners,” Dr. Kling said in an interview.

The panel did not recommend using progestogen with low-dose vaginal estrogen therapy or doing routine endometrial surveillance in women using vaginal estrogen. But endometrial surveillance may be worth considering in women with increased risk of endometrial cancer.

Estrogen insufficiency from premature menopause or primary ovarian insufficiency is linked to more severe sexual dysfunction, which can be particularly upsetting for younger women with vaginal atrophy and dyspareunia. A meta-analysis showed that vaginal estrogen appeared to slightly outperform over-the-counter lubricants in bringing back sexual function.

Undiagnosed vaginal or uterine bleeding is a contraindication for vaginal estrogen until the cause has been determined, and providers should use caution in prescribing vaginal estrogen to women with estrogen-dependent neoplasia. Dr. Faubion noted that GSM is common in women with breast cancer, especially if they are receiving endocrine treatments or aromatase inhibitors.

“For women with a hormone-dependent cancer, GSM management depends on each woman’s preference in consultants with her oncologist,” she said. GSM management in women with a nonhormone-dependent cancer, however, is no different than in women without cancer.

DHEA is a steroid that effectively improves vaginal maturation index, vaginal pH, dyspareunia, and vaginal dryness. The most common side effect is vaginal discharge.

Ospemifene, an estrogen agonist available in the United States but not in Canada, is the only oral product approved to treat vaginal dryness and dyspareunia. An observational study also found it effective in reducing recurrent UTIs. The most common side effect is vasomotor symptoms, and it should not be used in patients with breast cancer because it hasn’t been studied in this population.

“This updated information and position statement was needed and will be very clinically relevant in treating midlife women,” Dr. Kling said in an interview. “Dr. Faubion presented a high-level overview of the position statement with clinically relevant points, including treatment for sexual dysfunction related to GSM, GSM treatment in cancer patients, and emphasized the efficacy and low-risk safety profile of low-dose vaginal estrogen, compared to systemic [hormone therapy], for treatment of GSM.”

Dr. Faubion and Dr. Kling disclosed no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

It’s important for clinicians to ask women whether they are experiencing symptoms of genitourinary syndrome of menopause (GSM) before and after menopause, according to a new statement from the North American Menopause Society.

Stephanie Faubion, MD, MBA, medical director of NAMS, presented the updated statement at the virtual annual meeting of the North American Menopause Society.

“The one thing we tried to emphasize is proactive counseling and proactive inquiry, educating women when they hit perimenopause that this is a thing and that there are treatments,” Dr. Faubion said in an interview.

“I think women sometimes think there’s nothing they can do, which is not true. There’s the misperception that it’s just part of getting old, which it’s not,” said Dr. Faubion, who is also director of the Mayo Clinic Center for Women’s Health in Rochester, Minn., and chair of the department of medicine at the Mayo Clinic in Jacksonville, Fla.
 

Changes from previous statement

The GSM statement describes the symptoms and signs resulting from estrogen deficiency on the genitourinary tract, Dr. Faubion explained. The biggest change from the earlier version, published in 2013, is the condition’s new name. Formerly known as vulvovaginal atrophy, the condition’s new term was developed in 2014 and is now preferred by NAMS and the American College of Obstetricians and Gynecologists because it’s more comprehensive. Rather than just a physical description of the condition, GSM encompasses the many related symptoms and the urinary tract changes that occur, and it clearly associates the condition with menopause.

“Women don’t always associate these changes with menopause and don’t recognize that there’s something that can be done about it,” Dr. Faubion said. “We like to emphasize that sex should never be painful, but it’s not just about sex. It’s about comfort.”

Other changes include a review of evidence related to vaginal laser therapy for GSM and the availability of Imvexxy vaginal inserts with lower doses (4 mcg and 10 mpg) of estrogen.
 

Etiology and diagnosis of GSM

The presence of endogenous estrogen keeps the vaginal lining thick, rugated, well vascularized, and lubricated. As estrogen levels decline during postmenopause, the epithelial lining becomes thinner, with reduced blood supply and loss of glycogen.

The most common symptoms of GSM include irritation of the vulva, inadequate vaginal lubrication, burning, dysuria, dyspareunia, and vaginal discharge, but the symptoms may not always correlate with physical findings. In women with surgical menopause, the symptoms tend to be more severe. The most distressing symptoms to women are often those that affect sexual function.

“Clinicians must be proactive in asking menopausal women if GSM symptoms are present, even before menopause begins,” Dr. Faubion said.

Taking a women’s history during evaluation may help identify contributing factors, other causes, or potentially effective treatments based on what has worked in the past. History should include a description of symptoms, their onset and duration, how distressing they are, and their effect on the woman’s quality of life. A sexual history, such as lubricants the woman has used, can also be useful in determining management strategies.

Signs of GSM include labial atrophy, vaginal dryness, introital stenosis, clitoral atrophy, phimosis of the prepuce, reduced mons pubis and labia majora bulk, reduced labia minora tissue and pigmentation, and changes in the urethra, including erythema of the urethral meatus and commonly a urethral caruncle, a benign outgrown of inflammatory tissue that likely results from low estrogen levels and can be treated effectively with topical hormonal therapies.

A diagnosis of GSM requires both physical findings and bothersome symptoms, though not necessarily specific vaginal maturation index or vaginal pH values. The differential diagnosis speaks to the importance of taking a good history: allergic or inflammatory conditions, infection, trauma, presence of a foreign body, malignancy, vulvodynia, chronic pelvic pain, or provoked pelvic floor hypertonia.

If first-line therapies of over-the-counter lubricants do not sufficiently treat GSM, other effective treatments include low-dose vaginal estrogen therapy, systemic estrogen therapy if other menopause symptoms are present, vaginal dehydroepiandrosterone (DHEA), and ospemifene.
 

Management of GSM

First-line therapy of GSM involves over-the-counter lubricants and moisturizers, which are often adequate to alleviate or eliminate women’s symptoms. However, the panel that developed the statement found no evidence that hyaluronic acid was any more effective than other lubricants or moisturizers, and no herbal products were found to effectively treat GSM.

While emerging evidence suggests that energy-based therapies, such as treatments with vaginal laser or radiofrequency devices, show some promise, more evidence is needed to show safety and efficacy before the panel can recommend routine use.

When over-the-counter therapies are not effective, vaginal estrogen usually relieves GSM with little absorption and is preferred over systemic therapy if GSM is the only bothersome menopausal symptom. Options include topical creams, a slow-release estradiol intravaginal ring, and estradiol vaginal tablets and inserts.

“However, when systemic hormone therapy is needed to treat other menopause symptoms, usually a woman will derive benefit and resolution of the GSM at the same time,” Dr. Faubion said. “However, for some women, additional low-dose vaginal estrogen may be added to systemic estrogen if needed, and that could include vaginal DHEA.”

All the approved vaginal products have shown efficacy, compared with placebo in clinical trials, and a Cochrane review comparing the different therapies found them to be similarly efficacious in treating vaginal dryness and dyspareunia with no significant differences in adverse events.
 

Preparing patients for the boxed warning

As vaginal estrogen doses are significantly lower than systemic estrogen, their safety profile is better, with serum estrogen levels remaining within the postmenopausal range when low-dose vaginal estrogen therapy is used. That said, some studies have shown that vaginal estrogen cream can be a large enough dose to involve systemic absorption and lead to symptoms such as vaginal bleeding, breast pain, and nausea.

However, package inserts for vaginal estrogen have the same boxed warning as seen in systemic hormone therapy inserts regarding risk of endometrial cancer, breast cancer, cardiovascular disorders, and “probable dementia” despite these conditions not being linked to vaginal estrogen in trials. Neither has venous thromboembolism been linked to vaginal estrogen.

“The panel felt it was very important that women be educated about the differences between low-dose vaginal estrogen and systemic estrogen therapy and be prepared for this boxed warning,” Dr. Faubion told attendees. “It’s really important to say: ‘You’re going to get this, it’s going to look scary, and there’s no evidence these same warnings apply to the low-dose vaginal estrogen products.’ ”

This point particularly resonated with NAMS attendee Juliana (Jewel) Kling, MD, MPH, an associate professor of medicine at the Mayo Clinic Arizona, Scottsdale.

“The point about educating women about the differences between low-dose vaginal estrogen products and systemic treatments and being prepared for the boxed warning is important and I hope reaches many practitioners,” Dr. Kling said in an interview.

The panel did not recommend using progestogen with low-dose vaginal estrogen therapy or doing routine endometrial surveillance in women using vaginal estrogen. But endometrial surveillance may be worth considering in women with increased risk of endometrial cancer.

Estrogen insufficiency from premature menopause or primary ovarian insufficiency is linked to more severe sexual dysfunction, which can be particularly upsetting for younger women with vaginal atrophy and dyspareunia. A meta-analysis showed that vaginal estrogen appeared to slightly outperform over-the-counter lubricants in bringing back sexual function.

Undiagnosed vaginal or uterine bleeding is a contraindication for vaginal estrogen until the cause has been determined, and providers should use caution in prescribing vaginal estrogen to women with estrogen-dependent neoplasia. Dr. Faubion noted that GSM is common in women with breast cancer, especially if they are receiving endocrine treatments or aromatase inhibitors.

“For women with a hormone-dependent cancer, GSM management depends on each woman’s preference in consultants with her oncologist,” she said. GSM management in women with a nonhormone-dependent cancer, however, is no different than in women without cancer.

DHEA is a steroid that effectively improves vaginal maturation index, vaginal pH, dyspareunia, and vaginal dryness. The most common side effect is vaginal discharge.

Ospemifene, an estrogen agonist available in the United States but not in Canada, is the only oral product approved to treat vaginal dryness and dyspareunia. An observational study also found it effective in reducing recurrent UTIs. The most common side effect is vasomotor symptoms, and it should not be used in patients with breast cancer because it hasn’t been studied in this population.

“This updated information and position statement was needed and will be very clinically relevant in treating midlife women,” Dr. Kling said in an interview. “Dr. Faubion presented a high-level overview of the position statement with clinically relevant points, including treatment for sexual dysfunction related to GSM, GSM treatment in cancer patients, and emphasized the efficacy and low-risk safety profile of low-dose vaginal estrogen, compared to systemic [hormone therapy], for treatment of GSM.”

Dr. Faubion and Dr. Kling disclosed no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

Hormone therapy for menopausal symptoms has come a long way in the past decade, but some low risks remain, particularly for certain groups of women. But new naturally occurring estrogens are on the horizon and may provide safer options with similar efficacy for treating hot flashes and other symptoms, researchers report.

“Unfortunately, there is no such thing as the perfect estrogen that has all the things that makes it favorable and none of the negative,” Hugh S. Taylor, MD, told attendees at the virtual annual meeting of the North American Menopause Society. “It probably doesn’t exist. But there’s an opportunity for us to design better estrogens or take advantage of other naturally occurring estrogens that come closer to that goal of the ideal estrogen,” said Dr. Taylor, professor and chair of ob.gyn. and reproductive sciences at Yale University, New Haven, Conn.

Those naturally occurring estrogens are the fetal estrogens, estetrol and estriol, which are produced almost exclusively during pregnancy. Only estetrol has been investigated in clinical trials, and it does show some promise, Dr. Taylor said.

“If there’s a better cardiovascular effect without the breast cancer risk, this could be something everyone would want to take,” Dr. Taylor said in an interview. “It’s the first new estrogen we’ve had in many years, and it makes so much sense that we go back to a naturally occurring estrogen. We’ve never really been able to get a synthetic estrogen [that works].”
 

Hormone therapy still most effective for vasomotor symptoms

The primary benefits of hormone therapy for postmenopausal women are decreased hot flashes and night sweats and the prevention of bone loss, vaginal dryness, and vaginal atrophy. But as women age, particularly past age 70 years, the risks for stroke, heart disease, and breast cancer associated with hormone therapy begin to outweigh the benefits.

That leaves women who are still experiencing those symptoms in a quandary.

“Some people will take on substantial risks because they want to continue taking hormones,” Nanette F. Santoro, MD, a professor of ob.gyn. at the University of Colorado at Denver, Aurora, said in an interview. “If they understand what they’re doing and they tell me that they are that miserable, then I will continue their hormones.”

Dr. Santoro, who was not involved in Taylor’s work, said some patients have seen her because their primary care providers refused to continue prescribing them hormones at their age, despite serious vasomotor symptoms that interfered with their daily life.

“Women are sometimes not taken seriously, and I think that’s a problem,” Dr. Santoro said. “Women need to be able to make an informed choice about what kinds of risk they’re taking on. Many physicians’ rationales are that hot flashes never killed anybody. Well, they can sure make you miserable.”

Dr. Taylor echoed the importance of taking women’s symptoms seriously and helping them choose the most effective treatments to manage their symptoms.

“The rush of adrenaline, the anxiety, the palpitations, the heart racing, the sweating, all the night sweats [that mean] you can’t sleep at night, and the lack of adequate REM sleep – all these things add up and can really be disruptive to someone’s life,” Dr. Taylor said in an interview. “I think it’s important that we raise awareness of how severe it can be, about just how low the risks [of hormone therapy] are, and get people more comfortable using hormone therapy, but also continue to search for safer, better products that will eliminate even those low risks.”

A major development toward that goal in the past decade has been therapies that combine an estrogen with a selective estrogen receptor modulator (SERM), which have antiestrogen effects in the endometrium and breast without blocking estrogen in the bones and brain.

One such tissue-selective estrogen complex (TSEC) is the combination of bazedoxifene (20 mg) and conjugated estrogens (0.45 mg). Clinical trials showed that this TSEC reduced the frequency of hot flashes by 74%, compared with 47% with placebo. In addition, TSEC reduced the severity of hot flashes by 39%, compared with 13% with placebo. The combination also improved bone density at the spine and hip without promoting endometrial hyperplasia.

“It looks like it does exactly what we want,” Dr. Taylor told NAMS attendees. “The SERM is antagonizing the effects of the estrogens in the endometrium but not in the bone or brain.” It also led to a decrease in total cholesterol, and there was no increase in breast stimulation or density.

Another advance in recent years has been more choices and more precision with dosing, Dr. Santoro said.

“Where inroads have been made is in having women be aware of all the options they have and in getting the most convenient compounds to people,” she said, despite the confusion and misinformation that have arisen from the proliferation of bioidenticals. “You can dial in a dose for just about anybody.”
 

New estrogens in the pipeline

Neither of these developments, however, have eliminated the risks associated with hormone therapy for women of older age or for women at high risk for breast cancer. Although total elimination of risk may not be possible, recent research suggests that the naturally occurring fetal estrogens estriol and estetrol appear to have SERM-like properties, Dr. Taylor said. These estrogens are made only in pregnancy and appear to have evolved for a purpose different from that of estrone and estradiol.

“While both are weak estrogens by traditional standards, both have unique properties that make them very interesting for therapeutic use,” Dr. Taylor said. In particular, estetrol has a much longer half-life than estriol, making it more appropriate for therapeutic investigation.

A study of estetrol that was published in Menopause in August 2020 showed encouraging results. Despite a fairly sizable placebo effect, there was also a dose-response effect from estetrol on vasomotor symptoms. Low doses did not have much effect, but with higher doses (15 mg), there was a robust, significant improvement in the frequency and severity of hot flashes. So far, Dr. Taylor said, it looks like estetrol can be a highly effective treatment for vasomotor symptoms.

In addition, preclinical research suggests that estetrol may have a better safety profile than currently available therapies, though much more work is needed to know for sure. For example, a 2015 study found that it requires extremely high doses – well above therapeutic levels – for tumor growth to occur. Similarly, a 2019 study found that very high doses of estetrol or estriol were needed before it would stimulate breast cancer cell growth, likely because these are such weak estrogens, compared with estradiol, Dr. Taylor said.

There is currently less information on estetrol’s potential cardiovascular effects, but an animal model suggests positive effects, he said. Giving a mouse estetrol led to an increase in blood vessel dilation with increased blood flow.

The reason these estrogens appear to pose less risk yet still show therapeutic effects appears related to how they bind to the estrogen receptor and what their purpose is, Dr. Taylor told attendees.

“These fetal estrogens are really there probably for developmental programming,” he said. “It’s no wonder they may have some unique and favorable properties for therapeutic use. I’m really enthusiastic to see this explored further as a potential new hormonal therapy.”

Dr. Taylor disclosed no relevant financial relationships. Dr. Santoro reported stock ownership in Menogenix and consulting or advising for Ansh Labs, Menogenix, and Ogeda/Astellas.

A version of this article originally appeared on Medscape.com.

Hormone therapy for menopausal symptoms has come a long way in the past decade, but some low risks remain, particularly for certain groups of women. But new naturally occurring estrogens are on the horizon and may provide safer options with similar efficacy for treating hot flashes and other symptoms, researchers report.

“Unfortunately, there is no such thing as the perfect estrogen that has all the things that makes it favorable and none of the negative,” Hugh S. Taylor, MD, told attendees at the virtual annual meeting of the North American Menopause Society. “It probably doesn’t exist. But there’s an opportunity for us to design better estrogens or take advantage of other naturally occurring estrogens that come closer to that goal of the ideal estrogen,” said Dr. Taylor, professor and chair of ob.gyn. and reproductive sciences at Yale University, New Haven, Conn.

Those naturally occurring estrogens are the fetal estrogens, estetrol and estriol, which are produced almost exclusively during pregnancy. Only estetrol has been investigated in clinical trials, and it does show some promise, Dr. Taylor said.

“If there’s a better cardiovascular effect without the breast cancer risk, this could be something everyone would want to take,” Dr. Taylor said in an interview. “It’s the first new estrogen we’ve had in many years, and it makes so much sense that we go back to a naturally occurring estrogen. We’ve never really been able to get a synthetic estrogen [that works].”
 

Hormone therapy still most effective for vasomotor symptoms

The primary benefits of hormone therapy for postmenopausal women are decreased hot flashes and night sweats and the prevention of bone loss, vaginal dryness, and vaginal atrophy. But as women age, particularly past age 70 years, the risks for stroke, heart disease, and breast cancer associated with hormone therapy begin to outweigh the benefits.

That leaves women who are still experiencing those symptoms in a quandary.

“Some people will take on substantial risks because they want to continue taking hormones,” Nanette F. Santoro, MD, a professor of ob.gyn. at the University of Colorado at Denver, Aurora, said in an interview. “If they understand what they’re doing and they tell me that they are that miserable, then I will continue their hormones.”

Dr. Santoro, who was not involved in Taylor’s work, said some patients have seen her because their primary care providers refused to continue prescribing them hormones at their age, despite serious vasomotor symptoms that interfered with their daily life.

“Women are sometimes not taken seriously, and I think that’s a problem,” Dr. Santoro said. “Women need to be able to make an informed choice about what kinds of risk they’re taking on. Many physicians’ rationales are that hot flashes never killed anybody. Well, they can sure make you miserable.”

Dr. Taylor echoed the importance of taking women’s symptoms seriously and helping them choose the most effective treatments to manage their symptoms.

“The rush of adrenaline, the anxiety, the palpitations, the heart racing, the sweating, all the night sweats [that mean] you can’t sleep at night, and the lack of adequate REM sleep – all these things add up and can really be disruptive to someone’s life,” Dr. Taylor said in an interview. “I think it’s important that we raise awareness of how severe it can be, about just how low the risks [of hormone therapy] are, and get people more comfortable using hormone therapy, but also continue to search for safer, better products that will eliminate even those low risks.”

A major development toward that goal in the past decade has been therapies that combine an estrogen with a selective estrogen receptor modulator (SERM), which have antiestrogen effects in the endometrium and breast without blocking estrogen in the bones and brain.

One such tissue-selective estrogen complex (TSEC) is the combination of bazedoxifene (20 mg) and conjugated estrogens (0.45 mg). Clinical trials showed that this TSEC reduced the frequency of hot flashes by 74%, compared with 47% with placebo. In addition, TSEC reduced the severity of hot flashes by 39%, compared with 13% with placebo. The combination also improved bone density at the spine and hip without promoting endometrial hyperplasia.

“It looks like it does exactly what we want,” Dr. Taylor told NAMS attendees. “The SERM is antagonizing the effects of the estrogens in the endometrium but not in the bone or brain.” It also led to a decrease in total cholesterol, and there was no increase in breast stimulation or density.

Another advance in recent years has been more choices and more precision with dosing, Dr. Santoro said.

“Where inroads have been made is in having women be aware of all the options they have and in getting the most convenient compounds to people,” she said, despite the confusion and misinformation that have arisen from the proliferation of bioidenticals. “You can dial in a dose for just about anybody.”
 

New estrogens in the pipeline

Neither of these developments, however, have eliminated the risks associated with hormone therapy for women of older age or for women at high risk for breast cancer. Although total elimination of risk may not be possible, recent research suggests that the naturally occurring fetal estrogens estriol and estetrol appear to have SERM-like properties, Dr. Taylor said. These estrogens are made only in pregnancy and appear to have evolved for a purpose different from that of estrone and estradiol.

“While both are weak estrogens by traditional standards, both have unique properties that make them very interesting for therapeutic use,” Dr. Taylor said. In particular, estetrol has a much longer half-life than estriol, making it more appropriate for therapeutic investigation.

A study of estetrol that was published in Menopause in August 2020 showed encouraging results. Despite a fairly sizable placebo effect, there was also a dose-response effect from estetrol on vasomotor symptoms. Low doses did not have much effect, but with higher doses (15 mg), there was a robust, significant improvement in the frequency and severity of hot flashes. So far, Dr. Taylor said, it looks like estetrol can be a highly effective treatment for vasomotor symptoms.

In addition, preclinical research suggests that estetrol may have a better safety profile than currently available therapies, though much more work is needed to know for sure. For example, a 2015 study found that it requires extremely high doses – well above therapeutic levels – for tumor growth to occur. Similarly, a 2019 study found that very high doses of estetrol or estriol were needed before it would stimulate breast cancer cell growth, likely because these are such weak estrogens, compared with estradiol, Dr. Taylor said.

There is currently less information on estetrol’s potential cardiovascular effects, but an animal model suggests positive effects, he said. Giving a mouse estetrol led to an increase in blood vessel dilation with increased blood flow.

The reason these estrogens appear to pose less risk yet still show therapeutic effects appears related to how they bind to the estrogen receptor and what their purpose is, Dr. Taylor told attendees.

“These fetal estrogens are really there probably for developmental programming,” he said. “It’s no wonder they may have some unique and favorable properties for therapeutic use. I’m really enthusiastic to see this explored further as a potential new hormonal therapy.”

Dr. Taylor disclosed no relevant financial relationships. Dr. Santoro reported stock ownership in Menogenix and consulting or advising for Ansh Labs, Menogenix, and Ogeda/Astellas.

A version of this article originally appeared on Medscape.com.

Hormone therapy for menopausal symptoms has come a long way in the past decade, but some low risks remain, particularly for certain groups of women. But new naturally occurring estrogens are on the horizon and may provide safer options with similar efficacy for treating hot flashes and other symptoms, researchers report.

“Unfortunately, there is no such thing as the perfect estrogen that has all the things that makes it favorable and none of the negative,” Hugh S. Taylor, MD, told attendees at the virtual annual meeting of the North American Menopause Society. “It probably doesn’t exist. But there’s an opportunity for us to design better estrogens or take advantage of other naturally occurring estrogens that come closer to that goal of the ideal estrogen,” said Dr. Taylor, professor and chair of ob.gyn. and reproductive sciences at Yale University, New Haven, Conn.

Those naturally occurring estrogens are the fetal estrogens, estetrol and estriol, which are produced almost exclusively during pregnancy. Only estetrol has been investigated in clinical trials, and it does show some promise, Dr. Taylor said.

“If there’s a better cardiovascular effect without the breast cancer risk, this could be something everyone would want to take,” Dr. Taylor said in an interview. “It’s the first new estrogen we’ve had in many years, and it makes so much sense that we go back to a naturally occurring estrogen. We’ve never really been able to get a synthetic estrogen [that works].”
 

Hormone therapy still most effective for vasomotor symptoms

The primary benefits of hormone therapy for postmenopausal women are decreased hot flashes and night sweats and the prevention of bone loss, vaginal dryness, and vaginal atrophy. But as women age, particularly past age 70 years, the risks for stroke, heart disease, and breast cancer associated with hormone therapy begin to outweigh the benefits.

That leaves women who are still experiencing those symptoms in a quandary.

“Some people will take on substantial risks because they want to continue taking hormones,” Nanette F. Santoro, MD, a professor of ob.gyn. at the University of Colorado at Denver, Aurora, said in an interview. “If they understand what they’re doing and they tell me that they are that miserable, then I will continue their hormones.”

Dr. Santoro, who was not involved in Taylor’s work, said some patients have seen her because their primary care providers refused to continue prescribing them hormones at their age, despite serious vasomotor symptoms that interfered with their daily life.

“Women are sometimes not taken seriously, and I think that’s a problem,” Dr. Santoro said. “Women need to be able to make an informed choice about what kinds of risk they’re taking on. Many physicians’ rationales are that hot flashes never killed anybody. Well, they can sure make you miserable.”

Dr. Taylor echoed the importance of taking women’s symptoms seriously and helping them choose the most effective treatments to manage their symptoms.

“The rush of adrenaline, the anxiety, the palpitations, the heart racing, the sweating, all the night sweats [that mean] you can’t sleep at night, and the lack of adequate REM sleep – all these things add up and can really be disruptive to someone’s life,” Dr. Taylor said in an interview. “I think it’s important that we raise awareness of how severe it can be, about just how low the risks [of hormone therapy] are, and get people more comfortable using hormone therapy, but also continue to search for safer, better products that will eliminate even those low risks.”

A major development toward that goal in the past decade has been therapies that combine an estrogen with a selective estrogen receptor modulator (SERM), which have antiestrogen effects in the endometrium and breast without blocking estrogen in the bones and brain.

One such tissue-selective estrogen complex (TSEC) is the combination of bazedoxifene (20 mg) and conjugated estrogens (0.45 mg). Clinical trials showed that this TSEC reduced the frequency of hot flashes by 74%, compared with 47% with placebo. In addition, TSEC reduced the severity of hot flashes by 39%, compared with 13% with placebo. The combination also improved bone density at the spine and hip without promoting endometrial hyperplasia.

“It looks like it does exactly what we want,” Dr. Taylor told NAMS attendees. “The SERM is antagonizing the effects of the estrogens in the endometrium but not in the bone or brain.” It also led to a decrease in total cholesterol, and there was no increase in breast stimulation or density.

Another advance in recent years has been more choices and more precision with dosing, Dr. Santoro said.

“Where inroads have been made is in having women be aware of all the options they have and in getting the most convenient compounds to people,” she said, despite the confusion and misinformation that have arisen from the proliferation of bioidenticals. “You can dial in a dose for just about anybody.”
 

New estrogens in the pipeline

Neither of these developments, however, have eliminated the risks associated with hormone therapy for women of older age or for women at high risk for breast cancer. Although total elimination of risk may not be possible, recent research suggests that the naturally occurring fetal estrogens estriol and estetrol appear to have SERM-like properties, Dr. Taylor said. These estrogens are made only in pregnancy and appear to have evolved for a purpose different from that of estrone and estradiol.

“While both are weak estrogens by traditional standards, both have unique properties that make them very interesting for therapeutic use,” Dr. Taylor said. In particular, estetrol has a much longer half-life than estriol, making it more appropriate for therapeutic investigation.

A study of estetrol that was published in Menopause in August 2020 showed encouraging results. Despite a fairly sizable placebo effect, there was also a dose-response effect from estetrol on vasomotor symptoms. Low doses did not have much effect, but with higher doses (15 mg), there was a robust, significant improvement in the frequency and severity of hot flashes. So far, Dr. Taylor said, it looks like estetrol can be a highly effective treatment for vasomotor symptoms.

In addition, preclinical research suggests that estetrol may have a better safety profile than currently available therapies, though much more work is needed to know for sure. For example, a 2015 study found that it requires extremely high doses – well above therapeutic levels – for tumor growth to occur. Similarly, a 2019 study found that very high doses of estetrol or estriol were needed before it would stimulate breast cancer cell growth, likely because these are such weak estrogens, compared with estradiol, Dr. Taylor said.

There is currently less information on estetrol’s potential cardiovascular effects, but an animal model suggests positive effects, he said. Giving a mouse estetrol led to an increase in blood vessel dilation with increased blood flow.

The reason these estrogens appear to pose less risk yet still show therapeutic effects appears related to how they bind to the estrogen receptor and what their purpose is, Dr. Taylor told attendees.

“These fetal estrogens are really there probably for developmental programming,” he said. “It’s no wonder they may have some unique and favorable properties for therapeutic use. I’m really enthusiastic to see this explored further as a potential new hormonal therapy.”

Dr. Taylor disclosed no relevant financial relationships. Dr. Santoro reported stock ownership in Menogenix and consulting or advising for Ansh Labs, Menogenix, and Ogeda/Astellas.

A version of this article originally appeared on Medscape.com.

A new group of nonhormonal drugs currently in clinical trials shows strong promise for treating menopausal hot flashes as effectively as hormones, researchers told attendees at the virtual North American Menopause Society 2020 Annual Meeting.

“The KNDy [kisspeptin/neurokinin B/dynorphin] neuron manipulation is really exciting and holds great promise for rapid and highly effective amelioration of hot flashes, up to 80%, and improvement in other menopausal symptoms, though we’re still looking at the safety in phase 3 trials,” reported Susan D. Reed, MD, MPH, director of the Women’s Reproductive Health Research Program at the University of Washington, Seattle.

“If we continue to see good safety data, these are going to be the greatest things since sliced bread,” Dr. Reed said in an interview. “I don’t think we’ve seen anything like this in menopause therapeutics in a long time.”

While several nonhormonal drugs are already used to treat vasomotor symptoms in menopausal women with and without breast cancer, none are as effective as hormone treatments.

“For now, the SSRIs, SNRIs [serotonin norepinephrine reuptake inhibitors], and GABAergics are the best frontline nonhormonal options with a moderate effect, and clonidine and oxybutynin are effective, but we see more side effects with these,” Dr. Reed said. She noted the importance of considering patients’ mood, sleep, pain, sexual function, weight gain, overactive bladder, blood pressure, and individual quality of life (QOL) goals in tailoring those therapies.

But women still need more nonhormonal options that are at least as effective as hormonal options, Dr. Reed said. Some women are unable to take hormonal options because they are at risk for blood clots or breast cancer.

“Then there’s preference,” she said. “Sometimes people don’t like the way they feel when they take hormones, or they just don’t want hormones in their body. It’s absolutely critical to have these options available for women.”

Nanette F. Santoro, MD, a professor of ob.gyn. at the University of Colorado at Denver, Aurora, who was not involved in the presentation, said in an interview that physicians may not always realize the extent to which vasomotor symptoms interfere with women’s daily lives.

“They have an eroding effect on QOL that is not appreciated sometimes,” she said. Though hot flashes eventually subside in most women, others may continue to experience them into their 70s, when hormonal therapies can begin causing more harm than benefit.

“It goes underappreciated that, for a proportion of women, hot flashes will never go away, and they’re just as bad [as] when they were in their 50s,” Dr. Santoro said. “They need to be treated, and the nonhormonal treatments do not work for everybody.”
 

Promising KNDy therapeutics

Autopsy studies of postmenopausal women revealed that a complex of neurons in the hypothalamus was “massively hypertrophied” and sits right next to the thermoregulatory center of the brain, Dr. Reed explained.

The complex produces three types of molecules: kisspeptin (a neuropeptide), neurokinin B (a neuropeptide), and dynorphin (a kappa opioid), collectively referred to as the KNDy. The KNDy neural complex is located in the same place as the majority of hormone receptors in the arcuate nucleus, a collection of nerve cells in the hypothalamus.

The current hypothesis is that the KNDy neurons, which communicate with each other, become hyperactivated and cause hot flashes by spilling over to and triggering the thermoregulatory center next door. NKB (kisspeptin and neurokinin B) agonists activate KNDy neurons and dynorphin agonists inactivate KNDy, so the expectation is that NKB antagonists or dynorphin agonists would stop hot flashes.

Indeed, research published in 2015 showed that women taking kappa agonists experienced fewer hot flashes than women in the placebo group. However, no peripherally restricted kappa agonists are currently in clinical trials, so their future as therapeutics is unclear.

Right now, three different NK antagonists are in the pipeline for reducing vasomotor symptoms: MLE 4901 (pavinetant) and ESN364 (fezolinetant) are both NK3R antagonists, and NT-814 is a dual NK1R/NK3R antagonist. All three of these drugs were originally developed to treat schizophrenia.

Phase 2 clinical trials of pavinetant were discontinued in November 2017 by Millendo Therapeutics because 3 of 28 women experienced abnormal liver function, which normalized within 90 days. However, the study had shown an 80% decrease in hot flashes in women taking pavinetant, compared with a 30% decrease in the placebo group.

Fezolinetant, currently in phase 3 trials with Astellas, showed a dose response effect on reproductive hormones in phase 1 studies and a short half-life (4-6 hours) in women. It also showed no concerning side effects.

“There was, in fact, a decrease in the endometrial thickness, a delayed or impeded ovulation and a prolonged cycle duration,” Reed said.

The subsequent phase 2a study showed a reduction of five hot flashes a day (93% decrease), compared with placebo (54% decrease, P <.001) “with an abrupt return to baseline hot flash frequency after cessation,” she said. Improvements also occurred in sleep quality, quality of life, disability, and interference of hot flashes in daily life.

The phase 2b study found no difference in effects between once-daily versus twice-daily doses. However, two severe adverse events occurred: a drug-induced liver injury in one woman and cholelithiasis in another, both on the 60-mg, once-daily dose. Additionally, five women on varying doses had transient increases (above 1000 U/L) in creatinine kinase, though apparently without dose response.

A 52-week, three-arm, phase 3 trial of fezolinetant is currently under way with a goal of enrolling 1,740 participants, and plans to be completed by December 2021. Participants will undergo regular adverse event screening first biweekly, then monthly, with vital signs, blood, and urine monitoring.

Meanwhile, NT-814 from KaNDy Therapeutics, has completed phase 2a and phase 2b trials with phase 3 slated to begin in 2021. Adverse events in phase 1 included sleepiness and headache, and it had a long half-life (about 26 hours) and rapid absorption (an hour).

The phase 2a trial found a reduction of five hot flashes a day, compared with placebo, with main side effects again being sleepiness and headache. No events of abnormal liver function occurred. Phase 2b results have not been published.

So far, existing research suggests that KNDy interventions will involve a single daily oral dose that begins taking effect within 3 days and is fully in effect within 1-2 weeks. The reduction in hot flashes, about five fewer a day, is more effective than any other currently used nonhormonal medications for vasomotor symptoms. SSRIs and SNRIs tend to result in 1.5-2 fewer hot flashes a day, and gabapentin results in about 3 fewer per day. It will take longer-term studies, however, and paying attention to liver concerns for the NK3R antagonists to move into clinic.

“We want to keep our eye on the [luteinizing hormone] because if it decreases too much, it could adversely affect sexual function, and this does appear to be a dose-response finding,” Dr. Reed said. It would also be ideal, she said, to target only the KNDy neurons with NK3 antagonists without effects on the NK3 receptors in the liver.
 

Other nonhormonal options

Oxybutynin is another a nonhormonal agent under investigation for vasomotor symptoms. It’s an anticholinergic that resulted in 80% fewer hot flashes, compared with 30% with placebo in a 2016 trial, but 52% of women complained of dry mouth. A more recent study similarly found high efficacy – a 60%-80% drop in hot flashes, compared with 30% with placebo – but also side effects of dry mouth, difficulty urinating, and abdominal pain.

Finally, Dr. Reed mentioned three other agents under investigation as possible nonhormonal therapeutics, though she has little information about them. They include MT-8554 by Mitsubishi Tanabe; FP-101 by Fervent Pharmaceuticals; and Q-122 by QUE Oncology with Emory University, Atlanta, and the University of Queensland, Brisbane, Australia. 

None of the currently available nonhormonal options provide as high efficacy as hormones, but they do reduce symptoms:

Clonidine is an off-label option some physicians already use as a nonhormonal treatment for vasomotor symptoms, but again, the side effects are problematic: dry mouth, constipation, drowsiness, postural hypotension, and poor sleep.

Paroxetine, at 7.5-10 mg, is the only FDA-approved nonhormonal treatment for vasomotor symptoms, but she listed other off-label options found effective in evidence reviews: gabapentin (100-2,400 mg), venlafaxine (37.5-75 mg), citalopram (10 mg), desvenlafaxine (150 mg), and escitalopram (10 mg).

“I want you to take note of the lower doses in all of these products that are efficacious above those doses that might be used for mood,” Dr. Reed added.

Dr. Reed receives royalties from UpToDate and research funding from Bayer. Dr. Santoro owns stock in MenoGeniX and serves as a consultant or advisor to Ansh Labs, MenoGeniX, and Ogeda/Astellas.

A version of this article originally appeared on Medscape.com.

A new group of nonhormonal drugs currently in clinical trials shows strong promise for treating menopausal hot flashes as effectively as hormones, researchers told attendees at the virtual North American Menopause Society 2020 Annual Meeting.

“The KNDy [kisspeptin/neurokinin B/dynorphin] neuron manipulation is really exciting and holds great promise for rapid and highly effective amelioration of hot flashes, up to 80%, and improvement in other menopausal symptoms, though we’re still looking at the safety in phase 3 trials,” reported Susan D. Reed, MD, MPH, director of the Women’s Reproductive Health Research Program at the University of Washington, Seattle.

“If we continue to see good safety data, these are going to be the greatest things since sliced bread,” Dr. Reed said in an interview. “I don’t think we’ve seen anything like this in menopause therapeutics in a long time.”

While several nonhormonal drugs are already used to treat vasomotor symptoms in menopausal women with and without breast cancer, none are as effective as hormone treatments.

“For now, the SSRIs, SNRIs [serotonin norepinephrine reuptake inhibitors], and GABAergics are the best frontline nonhormonal options with a moderate effect, and clonidine and oxybutynin are effective, but we see more side effects with these,” Dr. Reed said. She noted the importance of considering patients’ mood, sleep, pain, sexual function, weight gain, overactive bladder, blood pressure, and individual quality of life (QOL) goals in tailoring those therapies.

But women still need more nonhormonal options that are at least as effective as hormonal options, Dr. Reed said. Some women are unable to take hormonal options because they are at risk for blood clots or breast cancer.

“Then there’s preference,” she said. “Sometimes people don’t like the way they feel when they take hormones, or they just don’t want hormones in their body. It’s absolutely critical to have these options available for women.”

Nanette F. Santoro, MD, a professor of ob.gyn. at the University of Colorado at Denver, Aurora, who was not involved in the presentation, said in an interview that physicians may not always realize the extent to which vasomotor symptoms interfere with women’s daily lives.

“They have an eroding effect on QOL that is not appreciated sometimes,” she said. Though hot flashes eventually subside in most women, others may continue to experience them into their 70s, when hormonal therapies can begin causing more harm than benefit.

“It goes underappreciated that, for a proportion of women, hot flashes will never go away, and they’re just as bad [as] when they were in their 50s,” Dr. Santoro said. “They need to be treated, and the nonhormonal treatments do not work for everybody.”
 

Promising KNDy therapeutics

Autopsy studies of postmenopausal women revealed that a complex of neurons in the hypothalamus was “massively hypertrophied” and sits right next to the thermoregulatory center of the brain, Dr. Reed explained.

The complex produces three types of molecules: kisspeptin (a neuropeptide), neurokinin B (a neuropeptide), and dynorphin (a kappa opioid), collectively referred to as the KNDy. The KNDy neural complex is located in the same place as the majority of hormone receptors in the arcuate nucleus, a collection of nerve cells in the hypothalamus.

The current hypothesis is that the KNDy neurons, which communicate with each other, become hyperactivated and cause hot flashes by spilling over to and triggering the thermoregulatory center next door. NKB (kisspeptin and neurokinin B) agonists activate KNDy neurons and dynorphin agonists inactivate KNDy, so the expectation is that NKB antagonists or dynorphin agonists would stop hot flashes.

Indeed, research published in 2015 showed that women taking kappa agonists experienced fewer hot flashes than women in the placebo group. However, no peripherally restricted kappa agonists are currently in clinical trials, so their future as therapeutics is unclear.

Right now, three different NK antagonists are in the pipeline for reducing vasomotor symptoms: MLE 4901 (pavinetant) and ESN364 (fezolinetant) are both NK3R antagonists, and NT-814 is a dual NK1R/NK3R antagonist. All three of these drugs were originally developed to treat schizophrenia.

Phase 2 clinical trials of pavinetant were discontinued in November 2017 by Millendo Therapeutics because 3 of 28 women experienced abnormal liver function, which normalized within 90 days. However, the study had shown an 80% decrease in hot flashes in women taking pavinetant, compared with a 30% decrease in the placebo group.

Fezolinetant, currently in phase 3 trials with Astellas, showed a dose response effect on reproductive hormones in phase 1 studies and a short half-life (4-6 hours) in women. It also showed no concerning side effects.

“There was, in fact, a decrease in the endometrial thickness, a delayed or impeded ovulation and a prolonged cycle duration,” Reed said.

The subsequent phase 2a study showed a reduction of five hot flashes a day (93% decrease), compared with placebo (54% decrease, P <.001) “with an abrupt return to baseline hot flash frequency after cessation,” she said. Improvements also occurred in sleep quality, quality of life, disability, and interference of hot flashes in daily life.

The phase 2b study found no difference in effects between once-daily versus twice-daily doses. However, two severe adverse events occurred: a drug-induced liver injury in one woman and cholelithiasis in another, both on the 60-mg, once-daily dose. Additionally, five women on varying doses had transient increases (above 1000 U/L) in creatinine kinase, though apparently without dose response.

A 52-week, three-arm, phase 3 trial of fezolinetant is currently under way with a goal of enrolling 1,740 participants, and plans to be completed by December 2021. Participants will undergo regular adverse event screening first biweekly, then monthly, with vital signs, blood, and urine monitoring.

Meanwhile, NT-814 from KaNDy Therapeutics, has completed phase 2a and phase 2b trials with phase 3 slated to begin in 2021. Adverse events in phase 1 included sleepiness and headache, and it had a long half-life (about 26 hours) and rapid absorption (an hour).

The phase 2a trial found a reduction of five hot flashes a day, compared with placebo, with main side effects again being sleepiness and headache. No events of abnormal liver function occurred. Phase 2b results have not been published.

So far, existing research suggests that KNDy interventions will involve a single daily oral dose that begins taking effect within 3 days and is fully in effect within 1-2 weeks. The reduction in hot flashes, about five fewer a day, is more effective than any other currently used nonhormonal medications for vasomotor symptoms. SSRIs and SNRIs tend to result in 1.5-2 fewer hot flashes a day, and gabapentin results in about 3 fewer per day. It will take longer-term studies, however, and paying attention to liver concerns for the NK3R antagonists to move into clinic.

“We want to keep our eye on the [luteinizing hormone] because if it decreases too much, it could adversely affect sexual function, and this does appear to be a dose-response finding,” Dr. Reed said. It would also be ideal, she said, to target only the KNDy neurons with NK3 antagonists without effects on the NK3 receptors in the liver.
 

Other nonhormonal options

Oxybutynin is another a nonhormonal agent under investigation for vasomotor symptoms. It’s an anticholinergic that resulted in 80% fewer hot flashes, compared with 30% with placebo in a 2016 trial, but 52% of women complained of dry mouth. A more recent study similarly found high efficacy – a 60%-80% drop in hot flashes, compared with 30% with placebo – but also side effects of dry mouth, difficulty urinating, and abdominal pain.

Finally, Dr. Reed mentioned three other agents under investigation as possible nonhormonal therapeutics, though she has little information about them. They include MT-8554 by Mitsubishi Tanabe; FP-101 by Fervent Pharmaceuticals; and Q-122 by QUE Oncology with Emory University, Atlanta, and the University of Queensland, Brisbane, Australia. 

None of the currently available nonhormonal options provide as high efficacy as hormones, but they do reduce symptoms:

Clonidine is an off-label option some physicians already use as a nonhormonal treatment for vasomotor symptoms, but again, the side effects are problematic: dry mouth, constipation, drowsiness, postural hypotension, and poor sleep.

Paroxetine, at 7.5-10 mg, is the only FDA-approved nonhormonal treatment for vasomotor symptoms, but she listed other off-label options found effective in evidence reviews: gabapentin (100-2,400 mg), venlafaxine (37.5-75 mg), citalopram (10 mg), desvenlafaxine (150 mg), and escitalopram (10 mg).

“I want you to take note of the lower doses in all of these products that are efficacious above those doses that might be used for mood,” Dr. Reed added.

Dr. Reed receives royalties from UpToDate and research funding from Bayer. Dr. Santoro owns stock in MenoGeniX and serves as a consultant or advisor to Ansh Labs, MenoGeniX, and Ogeda/Astellas.

A version of this article originally appeared on Medscape.com.

A new group of nonhormonal drugs currently in clinical trials shows strong promise for treating menopausal hot flashes as effectively as hormones, researchers told attendees at the virtual North American Menopause Society 2020 Annual Meeting.

“The KNDy [kisspeptin/neurokinin B/dynorphin] neuron manipulation is really exciting and holds great promise for rapid and highly effective amelioration of hot flashes, up to 80%, and improvement in other menopausal symptoms, though we’re still looking at the safety in phase 3 trials,” reported Susan D. Reed, MD, MPH, director of the Women’s Reproductive Health Research Program at the University of Washington, Seattle.

“If we continue to see good safety data, these are going to be the greatest things since sliced bread,” Dr. Reed said in an interview. “I don’t think we’ve seen anything like this in menopause therapeutics in a long time.”

While several nonhormonal drugs are already used to treat vasomotor symptoms in menopausal women with and without breast cancer, none are as effective as hormone treatments.

“For now, the SSRIs, SNRIs [serotonin norepinephrine reuptake inhibitors], and GABAergics are the best frontline nonhormonal options with a moderate effect, and clonidine and oxybutynin are effective, but we see more side effects with these,” Dr. Reed said. She noted the importance of considering patients’ mood, sleep, pain, sexual function, weight gain, overactive bladder, blood pressure, and individual quality of life (QOL) goals in tailoring those therapies.

But women still need more nonhormonal options that are at least as effective as hormonal options, Dr. Reed said. Some women are unable to take hormonal options because they are at risk for blood clots or breast cancer.

“Then there’s preference,” she said. “Sometimes people don’t like the way they feel when they take hormones, or they just don’t want hormones in their body. It’s absolutely critical to have these options available for women.”

Nanette F. Santoro, MD, a professor of ob.gyn. at the University of Colorado at Denver, Aurora, who was not involved in the presentation, said in an interview that physicians may not always realize the extent to which vasomotor symptoms interfere with women’s daily lives.

“They have an eroding effect on QOL that is not appreciated sometimes,” she said. Though hot flashes eventually subside in most women, others may continue to experience them into their 70s, when hormonal therapies can begin causing more harm than benefit.

“It goes underappreciated that, for a proportion of women, hot flashes will never go away, and they’re just as bad [as] when they were in their 50s,” Dr. Santoro said. “They need to be treated, and the nonhormonal treatments do not work for everybody.”
 

Promising KNDy therapeutics

Autopsy studies of postmenopausal women revealed that a complex of neurons in the hypothalamus was “massively hypertrophied” and sits right next to the thermoregulatory center of the brain, Dr. Reed explained.

The complex produces three types of molecules: kisspeptin (a neuropeptide), neurokinin B (a neuropeptide), and dynorphin (a kappa opioid), collectively referred to as the KNDy. The KNDy neural complex is located in the same place as the majority of hormone receptors in the arcuate nucleus, a collection of nerve cells in the hypothalamus.

The current hypothesis is that the KNDy neurons, which communicate with each other, become hyperactivated and cause hot flashes by spilling over to and triggering the thermoregulatory center next door. NKB (kisspeptin and neurokinin B) agonists activate KNDy neurons and dynorphin agonists inactivate KNDy, so the expectation is that NKB antagonists or dynorphin agonists would stop hot flashes.

Indeed, research published in 2015 showed that women taking kappa agonists experienced fewer hot flashes than women in the placebo group. However, no peripherally restricted kappa agonists are currently in clinical trials, so their future as therapeutics is unclear.

Right now, three different NK antagonists are in the pipeline for reducing vasomotor symptoms: MLE 4901 (pavinetant) and ESN364 (fezolinetant) are both NK3R antagonists, and NT-814 is a dual NK1R/NK3R antagonist. All three of these drugs were originally developed to treat schizophrenia.

Phase 2 clinical trials of pavinetant were discontinued in November 2017 by Millendo Therapeutics because 3 of 28 women experienced abnormal liver function, which normalized within 90 days. However, the study had shown an 80% decrease in hot flashes in women taking pavinetant, compared with a 30% decrease in the placebo group.

Fezolinetant, currently in phase 3 trials with Astellas, showed a dose response effect on reproductive hormones in phase 1 studies and a short half-life (4-6 hours) in women. It also showed no concerning side effects.

“There was, in fact, a decrease in the endometrial thickness, a delayed or impeded ovulation and a prolonged cycle duration,” Reed said.

The subsequent phase 2a study showed a reduction of five hot flashes a day (93% decrease), compared with placebo (54% decrease, P <.001) “with an abrupt return to baseline hot flash frequency after cessation,” she said. Improvements also occurred in sleep quality, quality of life, disability, and interference of hot flashes in daily life.

The phase 2b study found no difference in effects between once-daily versus twice-daily doses. However, two severe adverse events occurred: a drug-induced liver injury in one woman and cholelithiasis in another, both on the 60-mg, once-daily dose. Additionally, five women on varying doses had transient increases (above 1000 U/L) in creatinine kinase, though apparently without dose response.

A 52-week, three-arm, phase 3 trial of fezolinetant is currently under way with a goal of enrolling 1,740 participants, and plans to be completed by December 2021. Participants will undergo regular adverse event screening first biweekly, then monthly, with vital signs, blood, and urine monitoring.

Meanwhile, NT-814 from KaNDy Therapeutics, has completed phase 2a and phase 2b trials with phase 3 slated to begin in 2021. Adverse events in phase 1 included sleepiness and headache, and it had a long half-life (about 26 hours) and rapid absorption (an hour).

The phase 2a trial found a reduction of five hot flashes a day, compared with placebo, with main side effects again being sleepiness and headache. No events of abnormal liver function occurred. Phase 2b results have not been published.

So far, existing research suggests that KNDy interventions will involve a single daily oral dose that begins taking effect within 3 days and is fully in effect within 1-2 weeks. The reduction in hot flashes, about five fewer a day, is more effective than any other currently used nonhormonal medications for vasomotor symptoms. SSRIs and SNRIs tend to result in 1.5-2 fewer hot flashes a day, and gabapentin results in about 3 fewer per day. It will take longer-term studies, however, and paying attention to liver concerns for the NK3R antagonists to move into clinic.

“We want to keep our eye on the [luteinizing hormone] because if it decreases too much, it could adversely affect sexual function, and this does appear to be a dose-response finding,” Dr. Reed said. It would also be ideal, she said, to target only the KNDy neurons with NK3 antagonists without effects on the NK3 receptors in the liver.
 

Other nonhormonal options

Oxybutynin is another a nonhormonal agent under investigation for vasomotor symptoms. It’s an anticholinergic that resulted in 80% fewer hot flashes, compared with 30% with placebo in a 2016 trial, but 52% of women complained of dry mouth. A more recent study similarly found high efficacy – a 60%-80% drop in hot flashes, compared with 30% with placebo – but also side effects of dry mouth, difficulty urinating, and abdominal pain.

Finally, Dr. Reed mentioned three other agents under investigation as possible nonhormonal therapeutics, though she has little information about them. They include MT-8554 by Mitsubishi Tanabe; FP-101 by Fervent Pharmaceuticals; and Q-122 by QUE Oncology with Emory University, Atlanta, and the University of Queensland, Brisbane, Australia. 

None of the currently available nonhormonal options provide as high efficacy as hormones, but they do reduce symptoms:

Clonidine is an off-label option some physicians already use as a nonhormonal treatment for vasomotor symptoms, but again, the side effects are problematic: dry mouth, constipation, drowsiness, postural hypotension, and poor sleep.

Paroxetine, at 7.5-10 mg, is the only FDA-approved nonhormonal treatment for vasomotor symptoms, but she listed other off-label options found effective in evidence reviews: gabapentin (100-2,400 mg), venlafaxine (37.5-75 mg), citalopram (10 mg), desvenlafaxine (150 mg), and escitalopram (10 mg).

“I want you to take note of the lower doses in all of these products that are efficacious above those doses that might be used for mood,” Dr. Reed added.

Dr. Reed receives royalties from UpToDate and research funding from Bayer. Dr. Santoro owns stock in MenoGeniX and serves as a consultant or advisor to Ansh Labs, MenoGeniX, and Ogeda/Astellas.

A version of this article originally appeared on Medscape.com.