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• W4381892928 abstract "Abstract Study question Investigating estradiol in relation with other sperm parameters might reveal new correlations which would help our understanding of male idiopathic infertility Summary answer Statistical significance was found in a series of correlations of E2 levels and sperm, hormonal and health parameters What is known already Male infertility is a rising major health concern, with sperm counts decreasing by 50-60% in the recent decades. The causes for male infertility are very different (genetic, systemic, neurological, infections, trauma, etc.), but at least 44% of cases are idiopathic. Estradiol (E2) regulates spermatogenesis by binding to classical intracellular estrogen receptors or membrane estrogen receptors to trigger genomic and nongenomic signal transduction pathways. Although E2 doesn’t carry any prognostic value by itself, as its levels don’t vary significantly between infertile and fertile men, its association with other parameters may lead to a better understanding of male infertility Study design, size, duration the design of cross-sectional study comprising 111 subjects- 87 infertile patients (median: 34 years, range 20–55 years) and 24 control (median: 33 years, range 20–45 years). The subjects were included in this study during 3 years (between October 2019- September2022). Inclusion criteria: spermatic parameters according to WHO 2010 Standards Exclusion criteria: Radiotherapy and/or pelvic chemotherapy (over the last 6 months), known genetic aberrations, endocrine diseases, urogenital infections, bilateral orchiectomy, vasectomy and occupational exposure. Participants/materials, setting, methods Infertile men were grouped in azoospermia (AZOO), oligoasthenoteratozoospermia (OATS/OATSS) and oligoasthenozoospermia (OAS/OASS). Blood and semen samples were collected and E2 levels were measured in both seminal and blood samples, along with sperm parameters (sperm count, motility, morphology) and other factors (BMI, hormone and vitamin D levels, BsmI polymorphism in the vitamin D receptor gene) were evaluated. E2 levels were assayed using the electrochemiluminescence method with the RocheCobas E601 autoanalyzer. Main results and the role of chance E2 varies slightly between the different patients’ groups, the highest values being found in the OAT/OATSS group. BMI is higher in the infertile group; significant higher values were found for the OAS/OASS (p = 0.002) and OATS/OATS (p = 0.017) groups. Statistical analysis has revealed a significant difference between serum and seminal E2 levels in each group (AZOO p = 0.0355; OATS/OATSS p = 0.0156; control p = 0.0009), but also between OATS/OATSS seminal group and control seminal group (p = 0.0366). The E2/Inhibin ratio presented higher values in patients with OATS/OATSS (p = 0.0031) and azoospermia (p = 0.0059). The lowest values of E2/Vitamin D ratio were detected in the OAS/OASS and OATS/OATSS groups (p = 0.0254), A significant increase of E2 serum level was observed in patients from the OATS/OATSS group in the case of homozygous for mutant allele of BsmI polymorphism (p = 0.0419). The results bring new evidence regarding the role of E2 in male infertility. The obtained data indicates an interplay between E2 and Inhibin B and vitamin D serum levels, highlighting it’s the role in male infertility. Limitations, reasons for caution The study could be extended to a larger population sample, in order to further validate the obtained results Wider implications of the findings Estradiol activity plays an important role in male fertility and along with the investigated parameters could serve as potential markers in the diagnosis and management of male infertility. Trial registration number PN-III-P2-2.1-PED-2019-4402" @default.
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• W4381892928 date "2023-06-01" @default.
• W4381892928 modified "2023-10-16" @default.
• W4381892928 title "P-082 Estradiol levels in idiopathic male infertility" @default.
• W4381892928 doi "https://doi.org/10.1093/humrep/dead093.447" @default.
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