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Inflammatory breast carcinoma (IBC) is a special type of breast cancer with a poor survival rate. Though several IBC cell lines have been established, recently a first IMC cell line was established. The aims of this study were: (1) to validate a highly sensitive, reliable, accurate and direct amplified enzyme immunoassay (EIA) to measure several cell-secreted steroid hormones: progesterone (P4), androstenedione (A4), testosterone (T), 17β-estradiol (E2) and estrone sulfate (SO4E1) in the culture medium. (2) To assess whether hormone production profile by IPC-366 cells validates the IMC model for human IBC. We validated a non-competitive amplified EIA for inflammatory breast cancer cell lines based on the results of accuracy, precision, sensitivity and parallelism. The low detection limits of the technique were: P4=13.2 pg/well, A4=2.3 pg/well, T=11.4 pg/well, E2=1.9 pg/well and SO4E1=4.5 pg/well. Intra- and inter-assay coefficient of variation percentages were 90%. In all hormones studied SUM149 have higher levels (1.4 times, but not significant) than IPC-366, and the correlation index between SUM149 and IPC-366 concentrations were >97%. We can coclude that cells of both cell lines, IPC-366 and SUM149, are capable to produce steroid hormone in culture media. The presented EIA methodology is very valuable for the detection of steroid production in culture media and could be used in hormone regulation studies and therapeutic agents in cell lines of inflammatory and non-inflammatory mammary carcinoma or other cancer cell lines in preclinical studies. testosterone.

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Exposure to benzo[a]pyrene (B[a]P) is well reported to be associated with neurological and reproductive dysfunctions. The present study investigated the influence of kolaviron, an isolated biflavonoid from the seed of Garcinia kola, on functional alterations along the brain-pituitary-gonadal axis in male rats exposed to B[a]P. Benzo[a]pyrene was orally administered at a dose of 10mg/kg alone or orally co-administered with kolaviron at 100 and 200mg/kg for 15 consecutive days. Administration of B[a]P significantly (p<0.05) decreased plasma levels of pituitary hormones namely follicle-stimulating hormone (FSH) and prolactin but increased luteinizing hormone (LH) by 47%, 55% and 20.9%, respectively, when compared with the control. The significant decrease in gonadosomatic index (GSI) was accompanied by significant decrease in testosterone production and sperm functional parameters in the B[a]P-treated rats. Moreover, B[a]P-treated rats showed significant elevation in the circulatory concentrations of pro-inflammatory cytokines and oxidative stress indices in the brain, testes and sperm of B[a]P-treated rats. Light microscopy revealed severe necrosis of the Purkinje cells in the cerebellum, neuronal degeneration of the cerebral cortex, neuronal necrosis of the hippocampus and testicular atrophy in B[a]P-treated rats. Kolaviron co-treatment significantly ameliorated B[a]P mediated damages by suppressing pro-inflammatory mediators and enhancing the antioxidant status, neuroendocrine function, sperm characteristics and improving the architecture of the brain and testes in B[a]P-treated rats. The findings in the present investigation highlight that kolaviron may be developed to novel therapeutic agent against toxicity resulting from B[a]P exposure. testosterone.

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The purpose of this study was to observe the clinical utility and the possible determinants in predicting sperm retrieval of salvage microdissection testicular sperm extraction (mTESE) for nonobstructive azoospermia (NOA) patients with failed conventional TESE at their first attempts. A total of 52 NOA males underwent salvage mTESE were recruited in this study. Related data, including age, BMI, the presence of Klinefelter’s syndrome and varicocele, cryptorchidism, mean testicular volume, hormonal profile (total testosterone (TT), follicle-stimulating hormone (FSH), luteinising hormone (LH), inhibin B (INHB)), testicular histology and surgical duration, were collected and analysed. A multivariate logistic regression with likelihood ratio test revealed the following predictors of sperm retrieval: TT and testicular histology (chi-square of likelihood ratio = 26.42, df = 4, p < .005). A formula was also established using multivariate regression analysis in predicting sperm retrieval probability. A predicted probability of more than 71% was determined of the formula as the cut-off value in predicting sperm retrieval using receiver operating characteristics (ROC) analysis with a sensitivity and specificity 78.0% and 72.4% respectively. In conclusion, salvage mTESE is of clinical value in NOA males with failed TESE attempts, whereas the established formula could be useful in determining the proper salvage mTESE candidates. testosterone.

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The results of the present study have revealed that kisspeptin levels were significantly lower in all infertile males as compared to the fertile males. Significantly low LH and testosterone levels were observed in all infertile groups as compared to fertile group. FSH levels were significantly lower in normozoospermic and azoospermic as compared to fertile males, while no significant difference was observed between the other infertile and fertile group. testosterone.

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The zebra finch is a common model organism in neuroscience, endocrinology, and ethology. Zebra finches are generally considered opportunistic breeders, but the extent of their opportunism depends on the predictability of their habitat. This plasticity in the timing of breeding raises the question of how domestication, a process that increases environmental predictability, has affected their reproductive physiology. Here, we compared circulating steroid levels in various “strains” of zebra finches. In Study 1, using radioimmunoassay, we examined circulating testosterone levels in several strains of zebra finches (males and females). Subjects were wild or captive (Captive Wild-Caught, Wild-Derived, or Domesticated). In Study 2, using liquid chromatography-tandem mass spectrometry (LC-MS/MS), we examined circulating sex steroid profiles in wild and domesticated zebra finches (males and females). In Study 1, circulating testosterone levels in males differed across strains. In Study 2, six steroids were detectable in plasma from wild zebra finches (pregnenolone, progesterone, dehydroepiandrosterone (DHEA), testosterone, androsterone, and 5α-dihydrotestosterone (5α-DHT)). Only pregnenolone and progesterone levels changed across reproductive states in wild finches. Compared to wild zebra finches, domesticated zebra finches had elevated levels of circulating pregnenolone, progesterone, DHEA, testosterone, androstenedione, and androsterone. These data suggest that domestication has profoundly altered the endocrinology of this common model organism. These results have implications for interpreting studies of domesticated zebra finches, as well as studies of other domesticated species. testosterone.

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