Impact of new systemic oral and local, hormonal and non-hormonal treatments on genitourinary syndrome and Vulvo-Vaginal-Atrophy (VVA) through the menopausal transition: the right therapy in patients at risk

Abstract

During the menopausal transition, women experience a number of symptoms due to declining estrogen levels, including vasomotor symptoms and vulvar and vaginal atrophy (VVA). Unlike vasomotor symptoms, vaginal dryness and dyspareunia, the main symptoms of VVA, typically worsen without treatment and can significantly impact the quality of life. Up to 60% of postmenopausal women may be affected by VVA, but many women unfortunately do not seek treatment due to embarrassment, cardiovascular and oncologic risk factor, or other factors. Therefore, local estrogen treatment is still controversial due to the systemic absorption of estradiol and its potential effects on the breast and endometrium.The fact that up to 26% of women using systemic hormonal therapy continue to experience symptoms of urogenital atrophy is sufficient reason to justify not recommending systemic hormonal therapy in women with vaginal symptoms only; many women initially require a combination of systemic and local estrogen therapy, especially when it is used at low doses.Intravaginal application of DHEA as an alternative treatment compared to local estrogen therapy. Intravaginal DHEA does not increase serum E2 levels and may be a better option for long term treatment of VVA as there is no increase in serum E2 levels with DHEA. Previous data have shown that intravaginal dehydroepiandrosterone (DHEA, prasterone) improved all the domains of sexual function, an effect most likely related to the local formation of androgens from DHEA.As the first non-hormonal alternative to estrogen-based products for this indication, the approval of ospemifene represents a significant milestone in postmenopausal women's health. Ospemifene is a non-steroidal estrogen receptor agonist/antagonist, also known as a selective estrogen receptor modulator (SERM), which seems to be effective in genitourinary symptoms.There is now a new alternative to systemic hormone therapy with estrogen/gestagens. The tissue-selective estrogen complex (TSEC) which combines a SERM (bazedoxifene, BZA) with conjugated equine estrogens (CEE) is designed not only to improve menopausal symptoms but to prevent osteoporosis, while maintaining the benefits of estrogen therapy on vasomotor symptoms and vulvovaginal atrophy, but antagonizing stimulatory effects on the endometrium and mammary gland. The two studied doses of BZA/CEE (20 mg BZA + 0.425 mg CEE and 20 mg BZA + 0.625 mg CEE) have been shown to improve the percentage of superficial cells, reducing the percentage of basal cells. Thus, 20 mg BZA + 0.625 mg CEE reduces the severity of symptoms caused by atrophic vulvovaginitis by 56% and normalizes vaginal histology and pH. This efficacy persists for 2 years.Here we aim to evaluate current experimental and actual clinical strategies to achieve the main therapeutic goal for genitourinary syndrome and VVA in menopause which is the relief of symptoms, a better quality of life and women’ s health in menopausal women not eligible for Hormonal Replacement Therapy (HRT).