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https://www.readbyqxmd.com/read/28637041/the-effects-of-fungicides-on-human-3%C3%AE-hydroxysteroid-dehydrogenase-1-and-aromatase-in-human-placental-cell-line-jeg-3
#1
Shuyan Cao, Leping Ye, Ying Wu, Baiping Mao, Lanlan Chen, Xiudi Wang, Ping Huang, Ying Su, Ren-Shan Ge
Placenta secretes a large amount of progesterone and estradiol, which are critical for maintaining pregnancy. In human placenta, 3β-hydroxysteroid dehydrogenase 1 (HSD3B1) catalyzes pregnenolone to form progesterone, and aromatase (CYP19A1) catalyzes testosterone into estradiol. Fungicides display antifungal activities and are widely used to prevent fungal infections in agricultural plants. These chemicals include azoles, such as tebuconazole (TEB), triadimefon (TRI), and vinclozolin (VCZ) or organotins, such as tributyltin (TBT) and tetrabutyltin (TTBT)...
June 22, 2017: Pharmacology
https://www.readbyqxmd.com/read/28624767/effects-of-nrf1-on-steroidogenesis-and-apoptosis-in-goat-luteinized-granulosa-cells
#2
Guo-Min Zhang, Ming-Tian Deng, Zhi-Hai Lei, Yong-Jie Wan, Hai-Tao Nie, Zi-Yu Wang, Yi-Xuan Fan, Feng Wang, Yan-Li Zhang
During goat follicular development, abnormal expression of nuclear respiratory factor 1 (NRF1) in granulosa cells may drive follicular atresia with unknown regulatory mechanisms. In this study, we investigated the effects of NRF1 on steroidogenesis and cell apoptosis by overexpressing or silencing it in goat luteinized granulosa cells (LGCs). Results showed that knockdown of NRF1 expression significantly inhibited the expression of STAR and CYP19A1, which are involved in sex steroid hormones synthesis, and led to lower estrogen levels...
August 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28614857/combined-effect-of-the-pgr-331c%C3%A2-%C3%A2-t-cyp17a1-34a%C3%A2-%C3%A2-g-and-cyp19a1-1531g%C3%A2-%C3%A2-a-polymorphisms-on-the-risk-of-developing-endometriosis
#3
Jéssica Vilarinho Cardoso, Daniel Escorsim Machado, Renato Ferrari, Mayara Calixto da Silva, Plínio Tostes Berardo, Jamila Alessandra Perini
Purpose To evaluate the magnitude of the association of the polymorphisms of the genes PGR, CYP17A1 and CYP19A1 in the development of endometriosis. Methods This is a retrospective case-control study involving 161 women with endometriosis (cases) and 179 controls. The polymorphisms were genotyped by real-time polymerase chain reaction using the TaqMan system. The association of the polymorphisms with endometriosis was evaluated using the multivariate logistic regression. Results The endometriosis patients were significantly younger than the controls (36...
June 14, 2017: Revista Brasileira de Ginecologia e Obstetrícia
https://www.readbyqxmd.com/read/28611384/the-correlation-between-the-expression-of-genes-involved-in-drug-metabolism-and-the-blood-level-of-tacrolimus-in-liver-transplant-receipts
#4
Jianhai Wang, Keqiu Li, Xiaoning Zhang, Dahong Teng, Mingyan Ju, Yaqing Jing, Yuxia Zhao, Guang Li
Immunosuppressive medications, such as tacrolimus and mycophenolate mofetil, are commonly used for reducing the risk of organ rejection in receipts of allogeneic organ transplant. The optimal dosages of these drugs are required for preventing rejection and avoiding toxicity to receipts. This study aimed to identify the correlation between the expression profiling of genes involved in drug metabolism and the blood level of tacrolimus in liver transplant receipts. Sixty-four liver transplant receipts were enrolled in this retrospective study...
June 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28610873/williams-syndrome-transcription-factor-wstf-acts-as-an-activator-of-estrogen-receptor-signaling-in-breast-cancer-cells-and-the-effect-can-be-abrogated-by-1%C3%AE-25-dihydroxyvitamin-d3
#5
Johan Lundqvist, Tove Kirkegaard, Anne-Vibeke Laenkholm, Anne Katrine Duun-Henriksen, Martin Bak, David Feldman, Anne E Lykkesfeldt
A majority of estrogen receptor positive (ER+) breast cancers are growth stimulated by estrogens. The ability to inhibit the ER signaling pathway is therefore of critical importance in the current treatment of ER+ breast cancers. It has been reported that 1α,25-dihydroxyvitamin D3 down-regulates the expression of the CYP19A1 gene, encoding the aromatase enzyme that catalyzes the synthesis of estradiol. Furthermore, 1α,25-dihydroxyvitamin D3 has also been reported to down-regulate the expression of estrogen receptor α (ERα), the main mediator of ER signaling...
June 10, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28607476/zinc-finger-gene-217-znf217-promoted-ovarian-hyperstimulation-syndrome-ohss-through-regulating-e2-synthesis-and-inhibiting-thrombospondin-1-tsp-1
#6
Junyu Zhai, Jiansheng Liu, Xiaoyue Cheng, Shang Li, Yan Hong, Kang Sun, Zi-Jiang Chen, Yanzhi Du, Weiping Li
Zinc finger gene 217 (ZNF217) is a candidate gene of polycystic ovary syndrome (PCOS) which is vulnerable to ovarian hyperstimulation syndrome (OHSS). However, the relationship between ZNF217 and OHSS is largely unknown. Our study demonstrated that ZNF217 was mainly distributed in the granulosa cells of rat ovary. Significantly higher expression of ovarian ZNF217 was detected in OHSS rats, being consistent with serum 17β-estradiol concentration and ovarian aromatase. Moreover, OHSS rats also showed decreased ovarian TSP-1 mRNA, an acknowledged VEGF signaling suppressor...
June 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28606561/stat5-deletion-in-macrophages-alters-ductal-elongation-and-branching-during-mammary-gland-development
#7
Nicholas J Brady, Michael A Farrar, Kathryn L Schwertfeger
Macrophages are required for proper mammary gland development and maintaining tissue homeostasis. However, the mechanisms by which macrophages regulate this process remain unclear. Here, we identify STAT5 as an important regulator of macrophage function in the developing mammary gland. Analysis of mammary glands from mice with STAT5-deficient macrophages demonstrates delayed ductal elongation, enhanced ductal branching and increased epithelial proliferation. Further analysis reveals that STAT5 deletion in macrophages leads to enhanced expression of proliferative factors such as Cyp19a1/aromatase and IL-6...
June 9, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28603632/exemestane-potency-is-unchanged-by-common-nonsynonymous-polymorphisms-in-cyp19a1-results-of-a-novel-anti-aromatase-activity-assay-examining-exemestane-and-its-derivatives
#8
Amity Peterson, Zuping Xia, Gang Chen, Philip Lazarus
Exemestane (EXE) treats estrogen receptor positive (ER+) breast cancer in postmenopausal women by inhibiting the estrogen-synthesizing cytochrome P450 CYP19A1. Variability in the severity and incidence of side effects as well as overall drug efficacy may be partially explained by genetic factors, including nonsynonymous variation in CYP19A1, also known as aromatase. The present study identified phase I EXE metabolites in human liver microsomes (HLM) and investigated mechanisms that may alter the extent of systemic estrogen deprivation in EXE-treated women with breast cancer, including whether functional polymorphisms in aromatase cause differential inhibition by EXE and whether EXE metabolites possess anti-aromatase activity...
June 2017: Pharmacology Research & Perspectives
https://www.readbyqxmd.com/read/28595109/effects-of-nonglycosylated-and-glycosylated-prolactin-on-basal-and-gonadotropin-stimulated-steroidogenesis-in-chicken-ovarian-follicles
#9
S Q Hu, D Zadworny
In galliformes, the circulating isoform of prolactin (PRL) significantly changes during different reproductive states. However, the role of the major isoform (glycosylated PRL [G-PRL]) in ovarian steroidogenesis is unknown. The present study aimed to compare the effects of nonglycosylated (NG-) and G-PRL on basal and gonadotropin-stimulated estradiol (E2) and progesterone (P4) production in granulosa cells or follicular walls of chicken of different size class follicles. In the initial experiment, granulosa cells of preovulatory F3-F1 and prehierarchical 6- to 8-mm follicles were incubated for 24 h with different concentrations of NG- or G-PRL (0, 1, 10, 100, or 1,000 ng/mL)...
May 10, 2017: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/28592202/pharmacogenetics-and-aromatase-inhibitor-induced-side-effects-in-breast-cancer-patients
#10
Valentina Sini, Andrea Botticelli, Gianluigi Lunardi, Stefania Gori, Paolo Marchetti
This paper reviews genetic variations mainly related to the onset of adverse events during aromatase inhibitors in early breast cancer. Genetic variability could occur at different steps. The analysis included studies that involved breast cancer patients, treated with an aromatase inhibitor, genotyped for CYP19A1 and/or CYP17A1 and/or CYP27B1 and/or TCLA1, and/or RANK/RANKL/OPG and/or ESR1/ESR2, and assessed for toxicity profile. Twenty-two articles were included for the analysis. Three studies evaluated outcomes and adverse events; 19 studies assessed only side effects...
June 8, 2017: Pharmacogenomics
https://www.readbyqxmd.com/read/28579582/steroidogenic-enzyme-expression-in-estrogen-production-in-the-goat-gastrointestinal-gi-tract-and-the-effect-of-castration
#11
Hadi Mohibbi, Mohammad Ibrahim Qasimi, Kentaro Nagaoka, Gen Watanabe
Extragonadal tissues are known to produce estrogens. At these sites, the C19 precursor is important for aromatase expression for the production of estrogen. Aromatase expression is tissue-specific and is controlled by hormones. Recent studies have shown that rat gastric parietal cells expressed aromatase. Our first objective was to investigate steroidogenic enzyme expression in estrogen biosynthesis; the second objective was to investigate which site(s) of the GI tract expressed steroidogenic enzymes; and the third objective was to assess the effects of castration on steroidogenic enzyme expression...
June 2, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28573719/n-nitrosamines-induced-infertility-and-hepatotoxicity-in-male-rabbits
#12
S A Sheweita, Y Y El Banna, M Balbaa, I A Abdullah, H E Hassan
N-nitrosamines are widely spread environmental pollutants of well-known toxicity and carcinogenicity in various animal species. These compounds are metabolically activated by cytochrome P450 system predominantly in the liver and in other tissues into more active metabolites leading to generation of both alkylating agents that alkylate DNA and reactive oxygen species. In the current study, we investigated the influence of four types of N-nitrosamines that are commonly present in the environment [methyethylnitrosamine, (MEN), diethylnitrosamine (DEN), diphenylnitroasamine (DPN) and dimethylnitrosamine (DMN)] on both livers and testes of male rabbits through assessment of 17 β-hydroxysteroid dehydrogenase (17 β-HSD) activity...
June 2, 2017: Environmental Toxicology
https://www.readbyqxmd.com/read/28572510/the-bmp4-smad-signaling-pathway-regulates-hyperandrogenism-development-in-a-female-mouse-model
#13
Yang Liu, Shao-Yue Du, Meng Ding, Xin Dou, Fei-Fei Zhang, Zhi-Yong Wu, Shu-Wen Qian, Wei Zhang, Qi-Qun Tang, Cong-Jian Xu
Polycystic ovary syndrome (PCOS) is a common endocrine disorder and a major cause of anovulatory sterility in women at reproductive age. Most patients with PCOS have hyperandrogenism, caused by excess androgen synthesis. Bone morphogenetic protein 4 (BMP4) is an essential regulator of embryonic development and organ formation, and recent studies have also shown that BMP4 may be involved in female steroidogenesis process. However, effect of BMP4 on hyperandrogenism remains unknown. Here, using a female mouse model of hyperandrogenism, we found that ovarian BMP4 levels were significantly decreased in hyperandrogenism...
June 1, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28555054/knockdown-of-xbp1-by-rnai-in-mouse-granulosa-cells-promotes-apoptosis-inhibits-cell-cycle-and-decreases-estradiol-synthesis
#14
Nan Wang, Fan Zhao, Pengfei Lin, Guangle Zhang, Keqiong Tang, Aihua Wang, Yaping Jin
Granulosa cells are crucial for follicular growth, development, and follicular atresia. X-box binding protein 1 (XBP1), a basic region-leucine zipper protein, is widely involved in cell differentiation, proliferation, apoptosis, cellular stress response, and other signaling pathways. In this study, RNA interference, flow cytometry, western blot, real-time PCR, Cell Counting Kit (CCK8), and ELISA were used to investigate the effect of XBP1 on steroidogenesis, apoptosis, cell cycle, and proliferation of mouse granulosa cells...
May 29, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28546573/corrigendum-acquired-cyp19a1-amplification-is-an-early-specific-mechanism-of-aromatase-inhibitor-resistance-in-er%C3%AE-metastatic-breast-cancer
#15
Luca Magnani, Gianmaria Frigè, Raffaella Maria Gadaleta, Giacomo Corleone, Sonia Fabris, Mannus H Kempe, Pernette J Vershure, Iros Barozzi, Valentina Vircillo, Sung-Pil Hong, Ylenia Perone, Massimo Saini, Andreas Trumpp, Giuseppe Viale, Antonino Neri, Simak Ali, Marco Angelo Colleoni, Giancarlo Pruneri, Saverio Minucci
No abstract text is available yet for this article.
May 26, 2017: Nature Genetics
https://www.readbyqxmd.com/read/28532828/expression-of-apelin-and-apelin-receptor-apj-in-porcine-ovarian-follicles-and-in%C3%A2-vitro-effect-of-apelin-on-steroidogenesis-and-proliferation-through-apj-activation-and-different-signaling-pathways
#16
A Rak, E Drwal, Ch Rame, K Knapczyk-Stwora, M Słomczyńska, J Dupont, E L Gregoraszczuk
Apelin was thought to be an adipocyte-specific hormone, but recent studies indicate a link between apelin and female reproductive function. Using real-time PCR, immunoblotting, immunohistochemistry and ELISA, we demonstrated expression of apelin and its receptor (APJ) in ovarian follicles of different sizes from mature pigs. Apelin concentration in the follicular fluid, and expression of both apelin and APJ, increased with follicular growth; greatest values were found in large follicles. Immunohistochemistry revealed the positive staining for apelin and APJ in membranes of granulosa, than theca cells...
July 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28532823/effects-of-rumen-protected-methionine-and-choline-supplementation-on-steroidogenic-potential-of-the-first-postpartum-dominant-follicle-and-expression-of-immune-mediators-in-holstein-cows
#17
D A V Acosta, M I Rivelli, C Skenandore, Z Zhou, D H Keisler, D Luchini, M N Corrêa, F C Cardoso
Multiparous Holstein cows were assigned in a randomized complete block design into four treatments from 21 d before calving to 30 d in milk (DIM). Treatments were: MET [n = 19, fed the basal diet + rumen-protected methionine at a rate of 0.08% (w/w) of the dry matter, Smartamine(®) M], CHO (n = 17, fed the basal diet + choline 60 g/d, Reashure(®)), MIX (n = 21, fed the basal diet + Smartamine(®) M at a rate of 0.08% (w/w) of the dry matter and 60 g/d Reashure(®)), and CON (n = 20, no supplementation, fed the close-up and fresh cow diets)...
July 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28522306/the-effects-of-chronic-testosterone-administration-on-body-weight-food-intake-and-adipose-tissue-are-changed-by-estrogen-treatment-in-female-rats
#18
Takeshi Iwasa, Toshiya Matsuzaki, Kiyohito Yano, Rie Yanagihara, Altankhuu Tungalagsuvd, Munkhsaikhan Munkhzaya, Yiliyasi Mayila, Akira Kuwahara, Minoru Irahara
In females, estrogens play pivotal roles in preventing excess body weight (BW) gain. On the other hand, the roles of androgens in female BW, appetite, and energy metabolism have not been fully examined. We hypothesized that androgens' effects on food intake (FI) and BW regulation change according to the estrogens' levels. To evaluate this hypothesis, the effects of chronic testosterone administration in ovariectomized (OVX) female rats with or without estradiol supplementation were examined in this study. Chronic testosterone administration decreased BW, FI, white adipose tissue (WAT) weight, and adipocyte size in OVX rats, whereas it increased BW, WAT weight, and adipocyte size in OVX with estradiol-administered rats...
May 17, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28521442/mrna-expression-of-steroidogenic-enzymes-steroid-hormone-receptors-and-their-coregulators-in-gastric-cancer
#19
Bartosz Adam Frycz, Dawid Murawa, Maciej Borejsza-Wysocki, Mateusz Wichtowski, Arkadiusz Spychała, Ryszard Marciniak, Paweł Murawa, Michał Drews, Paweł Piotr Jagodziński
Epidemiological and experimental findings suggest that the development of gastric cancer (GC) is regulated by steroid hormones. In postmenopausal women and older men, the majority of steroid hormones are produced locally in peripheral tissue through the enzymatic conversion of steroid precursors. Therefore, using reverse transcription-quantitative polymerase chain reaction analysis, the mRNA expression of genes encoding steroidogenic enzymes, including steroid sulfatase (STS), hydroxy-delta-5-steroid dehydrogenase 3 beta- and steroid delta-isomerase 1 (HSD3B1), 17β-hydroxysteroid dehydrogenase type 7 and aromatase (CYP19A1), was investigated in primary tumoral and adjacent healthy gastric mucosa from 60 patients with GC...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28487654/the-association-of-cyp19a1-variation-with-circulating-estradiol-and-aromatase-inhibitor-outcome-can-cyp19a1-variants-be-used-to-predict-treatment-efficacy
#20
REVIEW
Dylan M Glubb, Tracy A O'Mara, Jannah Shamsani, Amanda B Spurdle
After menopause, estradiol is primarily synthesized in peripheral tissues by the enzyme aromatase, encoded by CYP19A1. CYP19A1 variation associates with circulating estradiol in postmenopausal women and this variation is best represented by the intronic variant rs727479. This variation appears to have pleiotropic effects as it also associates with endometrial cancer risk. Indeed, estradiol plays an important role in the development of breast and endometrial cancer. Aromatase inhibitor (AI) drugs are used in the treatment of both diseases, however, response rates for AIs are low and there is currently no way to identify breast or endometrial cancer patients who are more likely to receive a clinical benefit...
2017: Frontiers in Pharmacology
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