Influence of treatment of vulvovaginal atrophy with intravaginal prasterone on the male partner

Swiss consensus on the role of DHEA in the management of genitourinary syndrome of menopause

Genitourinary syndrome of menopause (GSM) has a significantly negative impact on affected women's lives. However, despite the increasing number of GSM treatment options (e.g. non-hormonal vaginal products, vaginal hormones [estrogens], dehydroepiandrosterone [DHEA; prasterone], vaginal laser therapy, oral ospemifene), many women remain untreated. The goal of the Swiss interdisciplinary GSM consensus meeting was to develop tools for GSM management in daily practice: a GSM management algorithm (personalized medicine); a communication tool for vaginal DHEA (drug facts box); and a communication tool for understanding regulatory authorities and the discrepancy between scientific data and package inserts. The acceptance and applicability of such tools will be further investigated.

The therapeutic effect of dehydroepiandrosterone (DHEA) on vulvovaginal atrophy

Vulvovaginal atrophy (VVA) is a chronic disease that mostly occurs in postmenopausal women. After menopause, insufficient sex hormones affect the anatomy of the vagina and cause drastic physiological changes. The main histopathological studies of VVA show that postmenopausal estrogen deficiency can lead to the increase of intermediate/parabasal cells, resulting in the loss of lactobacillus, elasticity and lubricity, vaginal epithelial atrophy, pain, dryness. Although the role of estrogen hormones in the treatment of VVA has always been in the past, it is now widely accepted that it also depends on androgens. Estrogen drugs have many side effects. So, Dehydroepiandrosterone（DHEA）is promising for the treatment of VVA, especially when women with contraindications to estrogen have symptoms. This review is expected to understand the latest developments in VVA and the efficacy of DHEA.

Treatment of genitourinary syndrome of menopause: the potential effects of intravaginal ultralow-concentration oestriol and intravaginal dehydroepiandrosterone on quality of life and sexual function

The climacteric is considered a natural phase in a woman's aging process and is defined as the period starting from the decline in ovarian activity until after the end of ovarian function. Genitourinary syndrome of menopause (GSM) is commonly observed in menopausal women and is characterised by a collection of symptoms resulting from changes to the internal and external genitalia as well as the lower urinary tract. Several studies have demonstrated the close association between sexual dysfunction and symptoms related to GSM. Many medications, at different doses, have been studied over the years for the treatment of the symptoms of GSM. More specifically, ultralow-dose intravaginal oestriol and intravaginal dehydroepiandrosterone (DHEA) are reported to improve symptoms, signs, and quality of life of women with GSM, and they are safe owing to their specific local effect. While the dosage and the administration of intravaginal DHEA are well defined, the literature on intravaginal oestriol is less uniform: different doses and times of administration are proposed with different possible combinations with other non-pharmacological therapies, although a more standardised treatment may be necessary. The aim of this review is to summarise the available data about the effects of ultralow-concentration oestriol and intravaginal DHEA on the menopause-related symptoms, quality of life, and sexual function of women affected by GSM.

Efficacy of intravaginal dehydroepiandrosterone (DHEA) for symptomatic women in the peri- or postmenopausal phase

OBJECTIVE

There is uncertainty whether treatment with dehydroepiandrosterone (DHEA) decreases menopausal symptoms for women in the peri- or postmenopausal phase. A previous systematic review considering this subject suggested that DHEA may slightly improve sexual function compared with placebo (CS. Scheffers, S. Armstrong, AEP. Cantineau, C. Farquhar, V. Jordan Dehydroepiandrosterone for women in the peri- or postmenopausal phase. Cochrane Database of Systematic Reviews 2015, Issue 1. Art. No.: CD011066. DOI: https://doi.org/10.1002/14651858.CD011066.pub2). The purpose of this article is to review recent research investigating whether the use of DHEA, and in particular intravaginal DHEA (Prasterone^®), improves sexual function.

METHODS

We conducted an online search using Medline OVID for recent articles related to DHEA and menopause. We found 48 relevant publications, out of which 14 papers were original research, all related to the development and licensing of intravaginal DHEA. We critically analysed these 14 articles in relation to sexual function.

RESULTS

All the randomised controlled trials assessed the efficacy of vaginal DHEA in women with vulvovaginal atrophy and showed that sexual dysfunction improved with treatment regardless of the level of dyspareunia at baseline. Treatment with DHEA was found to be superior to placebo and at least as efficacious as vaginal oestrogens in improving symptoms.

CONCLUSION

Intravaginal DHEA appears to be a safe and effective treatment for menopausal vulvovaginal atrophy and dyspareunia in most women. Further studies are required before it can be recommended for women with a history of thrombosis, cardiovascular disease or hormone-sensitive neoplasms.

Combined data of intravaginal prasterone against vulvovaginal atrophy of menopause

OBJECTIVE

To analyze the effects of intravaginal prasterone obtained in the three randomized clinical studies performed in postmenopausal women suffering from moderate to severe (MS) dyspareunia due to vulvovaginal atrophy (VVA).

METHODS

In three independent 12-week prospective, randomized, double-blind, and placebo-controlled clinical studies, the effect of daily intravaginal 0.50% (6.5 mg) prasterone was examined on four co-primary objectives in women having MS pain during sexual activity (dyspareunia), identified as their most bothersome symptom (MBS) of VVA at baseline.

RESULTS

In 436 women treated with 0.50% prasterone and 260 women who received placebo, an average 35.1% decrease over placebo in the percentage of parabasal cells (P < 0.0001), an average 7.7% increase in the percentage of superficial cells (P < 0.0001), and a mean 0.72 pH unit decrease in vaginal pH (P < 0.0001) were observed. The severity score of most bothersome symptom dyspareunia was decreased by a 0.46 unit (49%) (P < 0.0001 over placebo), whereas the severity score of MS vaginal dryness decreased by 0.31 unit (P < 0.0001 over placebo). A very positive evaluation was obtained on the acceptability of the technique of administration of the insert, whereas the male partners reported a very positive evaluation of the changes observed in their sexual partner.

CONCLUSION

The efficacy data demonstrate highly positive effects on all the symptoms and signs of vulvovaginal atrophy with no significant drug-related side effects in line with the physiology of menopause and intracrinology.

The effects of dehydroepiandrosterone on sexual function: a systematic review

OBJECTIVE

Faced with the growing interest about the action of dehydroepiandrosterone (DHEA) and its benefits, as well as the negative impacts that sexual dysfunctions have on people's quality of life, this systematic review was undertaken with the objective of evaluating the effect of DHEA use on aspects of sexual function.

METHOD

An electronic search was conducted in the databases of PubMed, ISI Web of Science and Virtual Health Library (VHL) combining the terms 'DHEA treatment' and 'DHEA use' with terms such as 'sexual dysfunction', 'sexual frequency' and 'libido'. No limits on time and language were imposed. Clinical studies were considered eligible where individuals for any reason made use of DHEA and if they had any aspect of sexual function assessed. Preclinical studies and systematic reviews were considered ineligible.

RESULTS

The search identified 183 references and 38 were considered eligible. DHEA improved aspects such as sexual interest, lubrication, pain, arousal, orgasm and sexual frequency. Its effect was better in populations with sexual dysfunction, especially in perimenopausal and postmenopausal women.

CONCLUSION

Considering the studies currently published, DHEA is effective in improving several aspects of sexual function, but this effect did not reach all the populations studied.

Serum steroid concentrations remain within normal postmenopausal values in women receiving daily 6.5mg intravaginal prasterone for 12 weeks

This study integrates all data obtained in women aged 40-80years enrolled with moderate to severe symptoms of vulvovaginal atrophy (VVA) who received daily intravaginal administration of 0.50% (6.5mg) dehydroepiandrosterone (DHEA; prasterone) for 12weeks (n=723; ITT-S population) as compared with placebo (n=266; ITT-S population). To this end, serum steroid levels (DHEA, DHEA-sulfate (DHEA-S), androst-5-ene-3β, 17β-diol (5-diol), testosterone, dihydrotestosterone (DHT), androstenedione (4-dione), estrone (E1), estradiol (E2), estrone sulfate (E1-S), androsterone glucuronide (ADT-G), and androstane-3α, 17β-diol 17-glucuronide (3α-diol-17G)) were measured at Day 1 and Week 12 by liquid chromatography-tandem mass spectrometry (LC-MS/MS) following validation performed according to the FDA guidelines [1-6]. In agreement with the mechanisms of intracrinology where DHEA is exclusively transformed intracellularly into active sex steroids which act and are inactivated locally before being released as glucuronided or sulfated metabolites for elimination by the kidneys and liver, all sex steroids remained well within normal postmenopausal values following administration of intravaginal DHEA. Serum estradiol, the most relevant sex steroid, was measured after 12weeks of treatment at 3.36pg/ml (cITT-S population) or 19% below the normal postmenopausal value of 4.17pg/ml. On the other hand, serum E1-S, the best recognized marker of global estrogenic activity, shows an average value of 209pg/ml at 12 weeks compared to 220pg/ml in normal postmenopausal women. Moreover, serum ADT-G, the main metabolite of androgens, also remains well within normal postmenopausal values. The present data shows that a low daily intravaginal dose (6.5mg) of DHEA (prasterone) which is efficacious on the symptoms and signs of VVA, permits to achieve the desired local efficacy without systemic exposure, in agreement with the stringent mechanisms of menopause established after 500 million years of evolution where each cell in each tissue is the master of its sex steroid exposure.

Serum levels of sex steroids and metabolites following 12 weeks of intravaginal 0.50% DHEA administration

The objective of the present phase III, placebo-controlled, double-blind, prospective and randomized study was to confirm the efficacy of daily intravaginal administration of 0.50% dehydroepiandrosterone (DHEA; prasterone) ovules for 12 weeks on moderate to severe dyspareunia (or pain at sexual activity) as most bothersome symptom of vulvovaginal atrophy (VVA) while having serum steroid concentrations within normal postmenopausal values. To this end, serum levels of DHEA, DHEA-sulfate (DHEA-S), Androst-5-ene-diol-3β, 17β-diol (5-diol), testosterone, dihydrotestosterone (DHT), androstenedione (4-dione), estrone (E1), estradiol (E2), estrone sulfate (E1-S), androsterone glucuronide (ADT-G), and androstane-3α, 17β-diol 17-glucuronide (3α-diol-17G) were measured by validated liquid chromatography-tandem mass spectrometry (LC-MS/MS). In agreement with the mechanisms of intracrinology, all serum sex steroids and metabolites concentrations after 12 weeks of daily intravaginal administration of 0.50% DHEA remain well within the limits of normal postmenopausal women. More specifically, the 12-week serum E2 concentration was measured at 22% below the average normal postmenopausal value (3.26 versus 4.17 pg/ml), thus eliminating any fear of E2 exposure outside the vagina. In addition, serum E1-S, a particularly reliable indicator of global estrogenic activity, shows serum levels practically superimposable to the value observed in normal postmenopausal women (219 versus 220 pg/ml). Similarly, serum ADT-G, the major metabolite of androgens, remains within normal postmenopausal values. The present data confirm the intracellular transformation of DHEA in the vagina resulting in local efficacy without any systemic exposure to sex steroids, observations which are in agreement with the physiological mechanisms of menopause.