Progestogens as a component of menopausal hormone therapy: the right molecule makes the difference

Ultra-low-dose continuous combined estradiol and dydrogesterone in postmenopausal women: A pooled safety and tolerability analysis

Objective: To assess the safety and tolerability of ultra-low dose estradiol and dydrogesterone (E0.5 mg/D2.5 mg) among postmenopausal women. Methods: This pooled analysis of data from three clinical studies assessed the effects of continuous combined ultra-low-dose estradiol and dydrogesterone among postmenopausal women. Participants received E0.5 mg/D2.5 mg or placebo for 13 weeks (double-blind, randomized, European study), E0.5 mg/D2.5 mg or placebo for 12 weeks (double-blind, randomized, Chinese study), or E0.5 mg/D2.5 mg for 52 weeks (open-label, European study). Safety outcomes included treatment-emergent adverse events (TEAEs), treatment-emergent serious adverse events (TESAEs), treatment discontinuation due to a TEAE, and adverse events of special interest (AESIs). Results: Overall, 1027 women were included in the pooled analysis (E0.5 mg/D2.5 mg, n = 736; placebo, n = 291). Mean treatment exposure was 288.9 days in the E0.5 mg/D2.5 mg group and 86.6 days in the placebo group. The proportion of women experiencing ≥1 TEAE was similar in the E0.5 mg/D2.5 mg and placebo groups (50.1% vs 49.5%, respectively). TESAEs occurred in 12 (1.6%) women receiving E0.5 mg/D2.5 mg and 9 (3.1%) women receiving placebo. Discontinuation of study treatment was infrequent in both groups (E0.5 mg/D2.5 mg: 1.5%; placebo: 2.4%). The occurrence of breast pain was more common in the E0.5 mg/D2.5 mg group than in the placebo group (2.0% vs 0.3%) as was uterine hemorrhage (6.5% vs 2.4%). The incidence of acne, hypertrichoses and weight increased was similar between groups. Conclusions: Across three studies, ultra-low-dose estradiol plus dydrogesterone was well tolerated among postmenopausal women, with no increase in TEAEs or TESAEs compared with placebo.

Ultra-low dose estradiol and dydrogesterone for the treatment of menopausal symptoms in a pooled, multi-ethnic population

OBJECTIVES

Evidence suggests ethnicity-specific differences in postmenopausal symptoms, highlighting the need for therapies that are efficacious across different ethnicities. We evaluated the efficacy of an ultra-low dose combination of 0.5 mg estradiol and 0.25 mg dydrogesterone (E 0.5 mg/D 2.5 mg) in alleviating vasomotor symptoms across a multi-ethnic population.

STUDY DESIGN

Data from two controlled trials were pooled to form a dataset of 583 postmenopausal women from across Europe and China. Participants were randomized to receive treatment with E 0.5 mg/D 2.5 mg or placebo for 12 weeks.

MAIN OUTCOME MEASURES

The main efficacy variable was absolute change in the number of hot flushes from baseline to end of treatment. Health-related quality of life and safety were also assessed.

RESULTS

Change in the number of hot flushes per day was greater with E 0.5 mg/D 2.5 mg versus placebo (mean difference - 1.5, 95 % confidence interval - 2.1, -1.0; p < 0.001). Participants treated with E 0.5 mg/D 2.5 mg reported improvement in health-related quality of life (including psychological symptoms, vaginal dryness), and high amenorrhea rates. Combined E 0.5 mg/D 2.5 mg was well tolerated: there were no differences between groups in the percentage of participants with at least one serious adverse event or treatment-emergent serious adverse events. Analysis of change in body weight indicated no differences between groups.

CONCLUSIONS

This pooled analysis demonstrates the consistent efficacy of E 0.5 mg/D 2.5 mg in the treatment of menopause-related symptoms across a multi-ethnic population of postmenopausal women.

Portable smartphone-enabled dydrogesterone sensors based on biomimetic polymers for personalized gynecological care

Dydrogesterone, a frequently prescribed synthetic hormone integral to the treatment of diverse gynecological conditions, necessitates precise quantification in complex human plasma. In this study, the development of a portable, smartphone-based electrochemical sensor employing screen-printed gold electrodes (SPAuEs) modified with a biomimetic, molecularly imprinted poly(methacrylic acid-co-methyl methacrylate) (MIP) is presented for dydrogesterone detection in human plasma. FTIR spectroscopy illustrates the transformation of a pre-polymer mixture into a polymerized matrix, while SEM reveals a uniform MIP/SPAuE surface morphology. The sensor fabrication protocol, encompassing MIP/SPAuE composition, polymerization solvent, incubation time, and scan rate, is optimized to achieve enhanced sensitivity. The MIP/SPAuEs sensor exhibits a linear sensor response to dydrogesterone within the concentration range of 1-500 nM, as evidenced by cyclic and differential pulse voltammetry. The MIP/SPAuE sensor demonstrates exceptional sensitivity, recording 8.2 × 10-3 μA nM-1, with a sub-nanomolar limit of detection (LOD = 370 pM), and low limit of quantification (LOQ = 1.12 nM), along with appreciable selectivity over common interferents. In real-world clinical applications, the designed sensor is effectively employed for the rapid and precise determination of dydrogesterone in human blood plasma, achieving a remarkable recovery of 81%. Furthermore, MIP/SPAuE coatings possess suitable stability over 15 days, indicating the robustness of the sensor material for multiple rounds of analysis. The developed sensor provides a sensitive, selective, and cost-effective solution for monitoring dydrogesterone in plasma during various gynecological disorders, allowing for personalized healthcare applications.

Exploring the potential for a set of UK hormone replacement therapy eligibility guidelines: A suggested proposal on the topic of venous thromboembolism

OBJECTIVE

To explore the feasibility for a set of hormone replacement therapy (HRT) eligibility guidelines that follow a similar structure and appearance to the UKMEC guidance for contraception. To enable non-specialists to feel confident in safely prescribing HRT and to aid selection of the most appropriate first line treatment.

METHODS

A literature review was undertaken with evidence summarised on the topic of venous thromboembolism (VTE) which is an area frequently considered a barrier to prescribing. Medical eligibility tables which separated HRT by type were then produced for a set of VTE-related topics.

RESULTS

The literature search confirmed the importance of distinguishing between different types and routes of administration when considering the suitability of HRT. Much of the evidence has been based on older synthetic types of HRT and whilst they still have a role in management, these medications carry different risks to the now more accepted use of body identical types. The search also highlighted the nuances involved, increasing the complexity of forming guidelines, with the need for consideration to be given to an individual's own perception of risks and benefits.

CONCLUSION

The demand for HRT has risen in recent years and there is a need for this to be managed effectively, particularly for patients in primary care. The production of this type of guidance will enable the non-specialist to feel confident in safe and evidence-based prescribing. The guidelines are also designed to demonstrate to prescribers which complex patients should be referred onto menopause specialists.

Navigating a plethora of progesterone receptors: Comments on the safety/risk of progesterone supplementation in women with a history of breast cancer or at high-risk for developing breast cancer

Progesterone and progestin agonists are potent steroid hormones. There are at least three major types of progesterone receptor (PR) families that interact with and respond to progesterone or progestin ligands. These receptors include ligand-activated transcription factor isoforms (PR-A and PR-B) encoded by the PGR gene, often termed classical or nuclear progesterone receptor (nPR), membrane-spanning progesterone receptor membrane component proteins known as PGRMC1/2, and a large family of progestin/adipoQreceptors or PAQRs (also called membrane PRs or mPRs). Cross-talk between mPRs and nPRs has also been reported. The complexity of progesterone actions via a plethora of diverse receptors warrants careful consideration of the clinical applications of progesterone, which primarily include birth control formulations in young women and hormone replacement therapy following menopause. Herein, we focus on the benefits and risk of progesterone/progestin supplementation. We conclude that progesterone-only supplementation is considered safe for most reproductive-age women. However, women who currently have ER + breast cancer or have had such cancer in the past should not take sex hormones, including progesterone. Women at high-risk for developing breast or ovarian cancer, either due to their family history or known genetic factors (such as BRCA1/2 mutation) or hormonal conditions, should avoid exogenous sex hormones and proceed with caution when considering using natural hormones to mitigate menopausal symptoms and/or improve quality of life after menopause. These individuals are urged to consult with a qualified OB-GYN physician to thoroughly assess the risks and benefits of sex hormone supplementation. As new insights into the homeostatic roles and specificity of highly integrated rapid signaling and nPR actions are revealed, we are hopeful that the benefits of using progesterone use may be fully realized without an increased risk of women's cancer.

Ameliorative effects of Kyung-Ok-Ko and its mixture with Pueraria lobata Ohwi on postmenopausal osteoporosis by promoting phytoestrogenic activity in rats

Introduction

Kyung-Ok-Ko (KOK) is a popular traditional medicine used as a natural alternative to hormone replacement therapy for treating postmenopausal symptoms in Asia. Pueraria lobata Ohwi (P. lobata) is rich in isoflavones and has been traditionally used in combination with other herbs to produce synergistic and pharmaceutical effects via a multi-target approach for disease treatment. We aimed to investigate the phytoestrogenic effects of KOK extract against postmenopausal symptoms in ovariectomized (OVX) rats and confirm its efficacy by mixing KOK and P. lobata extracts.

Methods

OVX rats were daily oral administrated with KOK and KOK + P. lobata mixture extracts (300-400 mg/kg) and their body weight and tail temperature were monitored for 12 weeks. The biochemical parameters, estradiol levels, and bone turnover markers were measured in the serum samples. Moreover, the estrogen receptor, ER-α and ER-β expression in the uterus and the uterus morphology were evaluated. AMPK, ATG1/ULK1, and mTOR protein expression in the liver were assessed.

Results

The 12-week treatment with KOK and KOK + P. lobata mixture extracts did not cause liver damage or hormonal changes in the OVX rats. The treatments reduced the high lipid accumulation-related body weight gain and the tail temperature increase that was induced by ovariectomy. Further, it exhibited protective effects against hyperlipidemia and osteoporosis. No significant difference was observed in uterine weight compared to the OVX-treated group, while endometrial thickness reduction inhibition was observed due to ovariectomy. Bone mineral density (BMD) and serum osteocalcin levels, which decreased in OVX rats, increased with both treatments. Western blotting analysis showed that ER-α and ER-β were not expressed in the treated rats, whereas these proteins were expressed in Sham-operated rats. No significant differences in the phosphorylation of AMPK were observed; however, the ATG1/ULK1 and mTOR protein phosphorylation levels were upregulated and downregulated in the treated rats compared to those of OVX rats, respectively.

Conclusion

This is the first in vivo study observing the efficacy and synergistic effects of the mixture of KOK and P. lobata. Our results suggest the potential of KOK and KOK + P. lobata mixture as an alternative therapy for alleviating menopausal symptoms.

What is there to know about the effects of progestins on the human brain and cognition?

Progestins are an important component of hormonal contraceptives (HCs) and hormone replacement therapies (HRTs). Despite an increasing number of studies elucidating the effects of HCs and HRTs, little is known about the effects of different types of progestins included in these medications on the brain. Animal studies suggest that various progestins interact differently with sex steroid, mineralocorticoid and glucocorticoid receptors and have specific modulatory effects on neurotransmitter systems and on the expression of neuropeptides, suggesting differential impacts on cognition and behavior. This review focuses on the currently available knowledge from human behavioral and neuroimaging studies pooled with evidence from animal research regarding the effects of progestins on the brain. The reviewed information is highly relevant for improving women's mental health and making informed choices regarding specific types of contraception or treatment.

Risk of venous thromboembolism during the use of oral estrogen-progestogen hormone therapies in light of most recent research findings

Two important studies evaluating the safety profile of oral estrogen-progestogen hormonal therapies conducted in standard clinical practice with respect to the venous system were recently published. A large prospective controlled cohort study (PRO-E2) based on the non-inferiority design has shown that the relative risk of developing venous thrombosis (VTE) in women using combined oral hormonal contraceptives (COHC) containing 17β-estradiol (1.5 mg) and nomegestrol acetate (2.5 mg) (E2/NOMAC) was not statistically different from that in users of COHC containing ethinylestradiol and levonorgestrel (EE/LNG). The aim of the recently presented study was to compare the risk of VTE in patients treated with a product for oral continuous combined menopausal hormone therapy containing 1 mg of 17ß-estradiol and 100 mg of micronized progesterone (1 mgE2/100 mgP4) with patients taking conjugated equine estrogens and medroxyprogesterone acetate (CEE/MPA). The study was based on an analysis of records retrieved from a US health insurance database, and was therefore concerned the real-life clinical practice. The hazard ratio of VTE when comparing 1 mgE2/100 mgP4 with CEE/MPA was 0.70 (95% CI: 0.53-0.92). The difference was found to be statistically significant (p < 0.05). The rewieved studies provide further evidence that the use of hormones bioidentical with endogenous steroids in oral contraception and menopausal hormone therapy creates an opportunity to combine high efficacy with a favorable safety profile.

Progesterone receptors in normal breast development and breast cancer

Progesterone receptors (PR) play a pivotal role in many female reproductive tissues such as the uterus, the ovary, and the mammary gland (MG). Moreover, PR play a key role in breast cancer growth and progression. This has led to the development and study of different progestins and antiprogestins, many of which are currently being tested in clinical trials for cancer treatment. Recent reviews have addressed the role of PR in MG development, carcinogenesis, and breast cancer growth. Thus, in this review, in addition to making an overview on PR action in normal and tumor breast, the focus has been put on highlighting the still unresolved topics on hormone treatment involving PR isoforms and breast cancer prognosis.