PHILADELPHIA – presented at the annual meeting of the Menopause Society (formerly The North American Menopause Society).
Dr. Wulf Utian
Participants taking estetrol experienced a decrease in hemoglobin A1c, fasting plasma glucose, total cholesterol, LDL and lipoprotein as well as an increase in HDL cholesterol, according to the findings presented by Wolf Utian, MD, PhD, DSC, a professor emeritus of reproductive biology at Case Western Reserve University, Cleveland, and medical director emeritus of the Menopause Society.
A separate poster at the conference from the same trial also reported significant improvements from estetrol in quality of life, including that related to vasomotor symptoms, and several psychosocial and sexual functioning areas.
Mayo Clinic
Dr. Chrisandra L. Shufelt
E4 is already available as combination oral contraception and is now being considered for treating vasomotor symptoms, explained Chrisandra Shufelt, MD, professor and chair of general internal of medicine and associate director of the Women’s Health Research Center at Mayo Clinic Florida, who was not involved in the study.
Background on estetrol
E4 is a human fetal liver estrogen produced during pregnancy that’s synthesized from plants for pharmaceutical use, including as the oral contraceptive drospirenone, Dr. Utian told attendees. It’s classified as a native estrogen with selective tissue activity (NEST), he said.
“E4 is a completely different native estrogen with oral administration mimicking the benefits of transdermals and hence safe and effective,” Dr. Utian said in an interview. “It would be a significant new addition to the pharmaceutical armamentarium.”
Two phase 3 trials presented by Dr. Utian at the same conference last year found estetrol reduced the frequency and severity of moderate to severe vasomotor symptoms, and a previous phase 2 trial finding vasomotor and genitourinary symptom benefits suggested it had potential benefits for lipids, carbohydrate metabolism, and bone turnover.
“In summary, E4 at a daily dose of 15 mg exhibited estrogenic effects in the vagina, leading to improved vaginal health and reduced signs of atrophy, emerging as a promising treatment option not only for vasomotor symptoms but also for other significant menopausal symptoms,” Dr. Utian said. “E4 could offer comprehensive relief for women experiencing a range of menopause-related discomforts.”
Dr. Utian also referenced a 2017 trial in which estetrol positively impacted lipid profiles, “lowering low-density lipoprotein cholesterol, increasing high-density lipoprotein cholesterol, and showing minimal influence on triglycerides,” he said. “Importantly, estetrol was associated with a significant decrease in osteocalcin levels in the higher dose groups, suggesting a potential preventive effect on bone loss,” he added. A recent review of the overall evidence on estetrol suggests its use is “promising,” Dr. Utian noted.