Objective: To determine whether bisphenol S (BPS), a common substitute for bisphenol A (BPA), induces cell proliferation and migration in human endometrial epithelial cells (Ishikawa) and adult mouse uterine tissues. Methodology: Human endometrial Ishikawa cells were exposed to low doses of BPS (1 nM and 100 nM) for 72 hours. Cell proliferation was assessed through the viability assays MTT and CellTiter-Glo®. Wound healing assays were also used to evaluate the migration potential of the cell line. The expression of genes related to proliferation and migration was also determined. Similarly, adult mice were exposed to BPS at a dose of 30 mg/kg body weight/day for 21 days, after which, the uterus was sent for histopathologic assessment. Results: BPS increased cell number and stimulated migration in Ishikawa cells, in association with the upregulation of estrogen receptor beta (ESR2) and vimentin (VIM). In addition, mice exposed to BPS showed a significantly higher mean number of endometrial glands within the endometrium. Conclusion Overall, in vitro and in vivo results obtained in this study showed that BPS could significantly promote endometrial epithelial cell proliferation and migration, a phenotype also observed with BPA exposure. Hence, the use of BPS in BPA-free products must be reassessed, as it may pose adverse reproductive health effects to humans.
endocrine-disrupting chemicals ; uterus ; hyperplasia

Background and Objective: Endocrine Disrupting Chemicals (EDCs) are ubiquitously found as low-level contaminants and pose serious threat to women’s health. EDCs may result in various reproductive disorders, fetal birth and developmental abnormalities, and endocrine and metabolic disorders. EDCs can be detected in body fluids of exposed individuals including blood and urine. This study aimed to detect four EDCs — Methyl Paraben (MP), 2,4-Dichlorophenoxyacetic acid (2,4-D), Monobutyl Phthalate (MBP), and Bisphenol A (BPA) in urine samples of women using Ultra-Performance Liquid Chromatography – Quadrupole Time-of-Flight (UPLC-QTOF) mass spectrometry. Methods: Sequential steps of enzymatic deconjugation, liquid-liquid extraction, solid phase extraction, and liquid chromatography separation and mass spectrometry detection were optimized in urine samples. The method was used to analyze 70 urine samples from women of reproductive age. Results: The sample preparation method showed a recovery ranging from 86.6% (MBP) to 100 % (2,4-D). The method demonstrated limits of quantitation ranging from 1.52 ng/m(MP) to 6.46 ng/mL(2,4D). Intra-day precisions expressed as relative standard deviation were all below 15% while accuracy was shown to range from 67.10% (2,4-D) to 102.39% (MBP). MP was detected in nine samples (12.86%) with a geometric mean value of 10.15 ng/ml (range: 3.62-52.39 ng/ml). MBP was detected in 68 samples (97.14%) with a geometric mean value of 97.62 ng/ml (range: 15.32-698.18 ng/ml). BPA was detected only once (9.58 ng/ml) while 2, 4-D was not detected in all samples. Conclusion A UPLC-QTOF mass spectrometry method to detect four EDCs at parts per billion level (ng/ml) was adapted and applied for analysis of urine samples. This method can find applicability in routine testing of clinical specimens as well as surveillance and other epidemiological studies.
Endocrine Disruptors

BACKGROUND: Polycystic ovarian syndrome (PCOS) is a prevalent condition affecting women of reproductive age, characterized by metabolic, endocrine, and reproductive disturbances including insulin resistance, abnormal uterine bleeding, infertility, and hyperandrogenism, and is associated with diabetes and cardiovascular disease. The etiology of PCOS is unclear and exposure to endocrine-disrupting chemicals (EDCs) present in everyday products may play a role by disrupting hormonal pathways. OBJECTIVES: To determine the association between exposure to EDC-containing products, sociodemographic factors, and PCOS diagnosis among nonpregnant reproductive-aged women. MATERIALS AND METHODS: A survey assessed the frequency of EDC exposure in homes and workplaces. The Rotterdam Criteria were used for the diagnosis of PCO features with clinical history and ultrasound. The association between PCOS and EDC exposure was determined using Chi-square and logistic regression analysis. RESULTS: The study identified significant sociodemographic factors associated with PCOS (P < 0.001) including age, civil status, and household income. Increased likelihood of PCOS was linked to frequent use of scented candles (odds ratio [OR] = 2.07), cleaning sprays (OR = 2.28), and floor polish (OR = 2.07), exposure to new upholstered furniture (OR = 4.00), thermal receipts (OR = 2.16), and consumption of microwaved and processed foods (OR = 2.60), as well as water sourced from wells (OR = 7.69). Additional associations were found with access to public markets (OR = 0.26) and the use of paper food wrappers (OR = 1.72). CONCLUSION These findings suggest that frequent exposure to EDC-containing products and certain sociodemographic factors may contribute to the development of PCOS among women of reproductive age. Results underscore the importance of reducing exposure to EDCs to prevent or mitigate the development of PCOS and other reproductive consequences.
Female