Progesterone Signaling and Uterine Fibroid Pathogenesis; Molecular Mechanisms and Potential Therapeutics

Uterine fibroids (UFs) are the most important benign neoplastic threat to women's health worldwide, with a prevalence of up to 80% in premenopausal women, and can cause heavy menstrual bleeding, pain, and infertility. Progesterone signaling plays a crucial role in the development and growth of UFs. Progesterone promotes the proliferation of UF cells by activating several signaling pathways genetically and epigenetically. In this review article, we reviewed the literature covering progesterone signaling in UF pathogenesis and further discussed the therapeutic potential of compounds that modulate progesterone signaling against UFs, including selective progesterone receptor modulator (SPRM) drugs and natural compounds. Further studies are needed to confirm the safety of SPRMs as well as their exact molecular mechanisms. The consumption of natural compounds as a potential anti-UFs treatment seems promising, since these compounds can be used on a long-term basis-especially for women pursuing concurrent pregnancy, unlike SPRMs. However, further clinical trials are needed to confirm their effectiveness.

Knowledge and counseling preferences of the public and pharmacy staff on emergency contraception: results of a cross-sectional study in Belgium

OBJECTIVE

To assess the knowledge and counseling preferences of the public ('individuals') and pharmacy staff ('professionals') in Belgium on emergency contraceptive pills (ECPs).

STUDY DESIGN

Cross-sectional study using two different anonymous, online surveys (one addressing the public and one professionals).

RESULTS

Overall, 1518 individuals and 1118 professionals participated, obtaining a mean knowledge score of 6.3(±1.8)/10 and 5.0(± 1.6)/10, respectively. For the public, a lower level of knowledge was found among men, non-healthcare workers and low educated individuals with no prior ECP use/purchase. For professionals, a lower level of knowledge was observed among pharmacy-technicians, French-speaking persons, and professionals with ≥5 years of experience and poorly involved in continuous education.

CONCLUSIONS

Limited knowledge on ECPs was observed among the public and pharmacy staff in Belgium, underscoring educational and counseling opportunities on ECPs.

Effects of ulipristal acetate in patients with symptomatic uterine fibroids

Introduction

Uterine fibroids are frequently encountered in gynecology and are a therapeutic challenge. New therapies, such as ulipristal acetate, could help with symptomatic relief, improve quality of life, and decrease uterine fibroid size. Notwithstanding, there is controversy about adverse effects, especially for hepatotoxicity.

Methods

We searched in Epistemonikos, the largest database of systematic reviews in health, which is maintained by screening multiple information sources, including MEDLINE, EMBASE, Cochrane, among others. We extracted data from the systematic reviews, reanalyzed data of primary studies, conducted a meta-analysis, and generated a summary of findings table using the GRADE approach.

Results and conclusions

We identified nine systematic reviews and included ten studies overall, of which five were randomized trials. We conclude that ulipristal increases the likelihood of amenorrhea, improves the quality of life, and decreases menstrual bleeding. However, there is also a likely increase in the risk of adverse effects. Furthermore, ulipristal could decrease the size of fibroids.

Emergency Contraception Access and Counseling in Urban Pharmacies: A Comparison between States with and without Pharmacist Prescribing

Pharmacists are often the primary source of emergency contraception (EC) access and patient information. This study aims to identify differences in pharmacist-reported EC access and counseling between states which do or do not permit pharmacist-prescribed EC. This prospective, mystery caller study was completed in California (CA), which permits pharmacist-prescribed EC after completion of continuing education, and Georgia (GA), which does not. All community pharmacies that were open to the public in San Diego and San Francisco, CA, and Atlanta, GA were called by researchers who posed as adult females inquiring about EC via a structured script. Primary endpoints were EC availability and counseling. Statistical analyses completed with SPSS. Researchers called 395 pharmacies, 98.2% were reached and included. Regarding levonorgestrel (LNG), CA pharmacists more frequently discussed (CA 90.4% vs. GA 81.2%, p = 0.02), stocked (CA 89.5% vs. GA 67.8%, p < 0.01), and correctly indicated it “will work” or “will work but may be less effective” 4 days after intercourse (CA 67.5% vs. GA 17.5%, p < 0.01). Ulipristal was infrequently discussed (CA 22.6% vs. GA 3.4%, p < 0.01) and rarely stocked (CA 9.6% vs. GA 0.7%, p < 0.01). Pharmacists practicing in states which permit pharmacist-prescribed EC with completion of required continuing education may be associated with improved patient access to oral EC and more accurate patient counseling.

1,25 Dihydroxyvitamin D3 Enhances the Antifibroid Effects of Ulipristal Acetate in Human Uterine Fibroids

BACKGROUND

Both European and American trials showed superior effect of ulipristal acetate (UPA) to placebo. However, the latter, which included black patients with known higher vitaminD3 deficiency risk, showed lower rate of amenorrhea responders and insignificant uterine fibroid (UF) size reduction. Our objective is to investigate whether adding vitamin D₃ to UPA can enhance UPA potency on UF phenotype in vitro.

METHODS

We screened the antiproliferative effect of different (UPA/vitaminD3) combinations on UF cell proliferation using dimethylthiazolyl diphenyltetrazolium bromide assay. Cells then were treated with UPA 100 nM in the presence or absence of vitamin D₃ 100 nM, and expression level of several markers related to proliferation, apoptosis, fibrosis, inflammation, and angiogenesis was measured on RNA or at protein level using quantitative real-time polymerase chain reaction, Western blot, immunofluorescence, or multiplex enzyme-linked immunosorbent assay techniques.

RESULTS

Significant dose- and time-dependent growth inhibitory effects of UPA/vitamin D₃ combinations were observed compared to untreated cells at 2 and 4 days (P < .05). Importantly, vitamin D₃/UPA combination significantly reduced cell proliferation as compared to UPA at 2, 4, 6, and 8 days (P < .05). Combination treatment significantly decreased protein expression of proliferation markers Ki-67, PCNA, and CyclinD1 by more than 50% compared to UPA (P < .05) along with a significant increase in apoptosis induction. Combination treatment resulted in a 2-fold decrease in protein levels of extracellular matrix markers collagen-1 and fibronectin besides pro-fibrogenic cytokine transforming growth factor β3 (P < .05). Moreover, it significantly decreased the production of pro-inflammatory cytokines interleukins 6, 8, 1α, and 1β compared to UPA (P < .05).

CONCLUSION

Combination of vitamin D₃ with UPA exhibits additional and orchestrated anti-UF effects, therefore might offer a more favorable clinical option.

Treatment of endometriosis-related chronic pelvic pain with Ulipristal Acetate and associated endometrial changes

Background

Aberrant progesterone signaling has been demonstrated in mechanistic studies to be a shared common pathway in fibroids and endometriosis. Progesterone receptor modulation with the selective progesterone receptor modulator (SPRM) ulipristal may decrease pain associated with endometriosis.

Case

A 25-year-old nulligravidae with endometriosis-related pelvic pain refractory to medical and surgical intervention was administered 15mg ulipristal every other day for 3 months. Daily pain scores and bleeding diary were recorded and serum chemistries and hormone levels were checked prior to, during, and after treatment. Pre-treatment and surveillance endometrial biopsy specimens were examined for histology and stained for estrogen and progesterone receptor status. During therapy, pain scores decreased to a median of 0 (P<0.05) and the patient became amenorrheic. Surveillance endometrial biopsy demonstrated SPRM-associated endometrial changes that appeared strikingly similar to simple hyperplasia and resolved with ulipristal discontinuation. Immunohistochemical evaluation demonstrated the presence of estrogen and progesterone receptors before and during ulipristal treatment.

Conclusions

Progesterone receptor modulation with ulipristal substantially improved pain symptoms in a patient with treatment-refractory endometriosis. SPRM-associated changes in the endometrium closely mimicked hyperplasia, developed after less than three months of treatment, and resolved after discontinuation of ulipristal and induction of withdrawal bleed.

Pregnancy Outcomes Following Ulipristal Acetate Emergency Contraception Failure: A Report of Five Cases

INTRODUCTION

The emergency contraceptive ulipristal acetate (UPA) 30 mg is increasingly used by women, but there is no published data on UPA exposure in pregnancy.

CASE REPORT

Here we describe five cases of unintended pregnancies following the use of UPA for emergency contraception. Of five pregnant women exposed to UPA, one decided to terminate the pregnancy for personal reasons. Two of them experienced premature rupture of membranes and the babies were born large for gestational age (LGA). The other two women experienced gestational diabetes, and one of them also delivered a LGA baby. The blood glucose levels of the mothers were normal after delivery and at six weeks postpartum. No birth defects and no growth or developmental abnormalities for the infants were reported during 6 months follow-up.

CONCLUSION

Pregnant women inadvertently exposed to UPA should be monitored carefully, unless further data are available.

Ulipristal acetate for uterine fibroids: a systematic review and meta-analysis

Ulipristal acetate (UA), a selective progesterone modulator, has been approved for short-term therapy for symptomatic fibroids. We decided to undertake a systematic review of the best available evidence and draw a more definitive conclusion regarding the efficacy of UA for the management of uterine fibroids. The outcomes included symptomatic relief, quality of life-related parameters, reduction in fibroid size, side effects and recurrence rate. We included four randomised controlled trials which consisted of three trials which compared UA with placebo, and one trial compared it with gonadotropin-releasing hormone analogues for symptomatic relief. The three trials comparing UA with placebo reported significant improvement in symptoms related to excessive uterine bleeding as evidenced by the attainment of amenorrhea or reduction in pictorial blood assessment chart. However, due to the heterogeneity of the available data, a meta-analysis was possible only for one the outcomes - attainment of amenorrhea which indicated improvement in symptoms [57.88 (19.81-169.16); p < 0.00001]. The improved quality of life parameters and reduction in fibroid size was noted in the UA group. With regards to adverse events, even though the three included studies reported increased non-physiological endometrial-related changes following UA, these changes reverted back to normal within 6 months. Short-term use of UA seems to be an effective and safe method of treating uterine fibroids.

Current Opinion of Obstetricians on the Prescription of Emergency Contraception: A German-American Comparison

Background: There are no current studies on the opinions of obstetricians and gynaecologists in Germany about emergency contraception (or post-coital contraception, morning-after pill). The opinions of a large group of physicians were collected using of a questionnaire and compared with the results of an American survey (n = 1154). Methods: A two-part questionnaire was used - part 1: sociodemographic data, part 2: 4 scenarios to illustrate the possible advantages and disadvantages of free access to emergency contraception as well as 4 indications and situations for which emergency contraception can be prescribed. Results: The response rate was 91.7 % (165/180 questionnaires). 63.9 % (103/161) of the German responding physicians were of the opinion that women with access to emergency contraception experienced unwanted pregnancies less frequently than those without access. Merely 26.2 % of the responding physicians supported the prescription-free availability of emergency contraception in apothecaries. The German-American comparison ultimately revealed only a few major differences, e.g., in answers to the question whether or not access to emergency contraception could reduce the number of unwanted pregnancies (89 vs. 64 %). Conclusions: The high rejection rate of free access to emergency contraception of almost 70 % in our surveyed group supports the current position published by the German Society for Gynaecology and Obstetrics (Deutsche Gesellschaft für Gynäkologie und Geburtshilfe) and the German Professional Union of Gynaecologists (deutscher Berufsverband der Frauenärzte). Since other medical organisations, e.g., WHO, supported the prescription-free access to levonorgestrel formulations as emergency contraception a few years ago, it would be interesting to ask a larger sample of German gynaecologists and obstetricians about their opinions on emergency contraception.