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https://www.readbyqxmd.com/read/29339197/differential-insulin-and-steroidogenic-signaling-in-insulin-resistant-and-non-insulin-resistant-human-luteinized-granulosa-cells-a-study-in-pcos-patients
#1
Muskaan Belani, Abhilash Deo, Preeti Shah, Manish Banker, Pawan Singal, Sarita Gupta
Insulin resistance (IR) is one of the significant aberrations in polycystic ovarian syndrome (PCOS), however is only observed in 70%-80% of obese PCOS and 20%-25% of lean PCOS. Hyperinsulinemia accompanies PCOS-IR along with hyperandrogenemia against normal insulin and androgen levels in PCOS-non insulin resistance (NIR). This could possibly be due to defects in the downstream signaling pathways. The study thus aims to unravel insulin and steroidogenic signaling pathways in luteinized granulosa cells isolated from PCOS -IR and NIR vs matched controls...
January 12, 2018: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29325096/genetic-determinants-of-circulating-estrogen-levels-and-evidence-of-a-causal-effect-of-estradiol-on-bone-density-in-men
#2
Anna L Eriksson, John R B Perry, Andrea D Coviello, Graciela E Delgado, Luigi Ferrucci, Andrew R Hoffman, Ilpo T Huhtaniemi, M Arfan Ikram, Magnus K Karlsson, Marcus E Kleber, Gail A Laughlin, Yongmei Liu, Mattias Lorentzon, Kathryn L Lunetta, Dan Mellström, Joanne M Murabito, Anna Murray, Maria Nethander, Carrie M Nielson, Inga Prokopenko, Stephen R Pye, Leslie J Raffel, Fernando Rivadeneira, Priya Srikanth, Lisette Stolk, Alexander Teumer, Thomas G Travison, André G Uitterlinden, Dhananjay Vaidya, Dirk Vanderschueren, Joseph M Zmuda, Winfried März, Eric S Orwoll, Pamela Ouyang, Liesbeth Vandenput, Frederick C W Wu, Frank H de Jong, Shalender Bhasin, Douglas P Kiel, Claes Ohlsson
Context: Serum estradiol (E2) and estrone (E1) levels exhibit substantial heritability. No genome-wide association study (GWAS) of estrogen levels has been performed in men of European origin. Objective: To investigate the genetic regulation of serum E2 and E1 in men. Design, setting and participants: GWAS in 11,097 men of European origin from nine epidemiological cohorts. Main Outcome Measures: Genetic determinants of serum E2 and E1 levels...
January 9, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29324451/aromatase-deficiency-due-to-a-homozygous-cyp19a1-mutation-in-a-46-xx-egyptian-patient-with-ambiguous-genitalia
#3
Inas Mazen, Ken McElreavey, Aya Elaidy, Alaa K Kamel, Mohamed S Abdel-Hamid
Aromatase deficiency (AD) is a very rare disorder resulting from mutations in the CYP19A1 gene encoding aromatase, a cytochrome P450 enzyme that plays a pivotal role in androgen conversion to estrogens. AD is inherited in an autosomal recessive trait, and to date only 35 cases have been described in the literature. Herein, we depict a new patient reared as a male, who presented at the age of 21 years with no palpable testis, hypoplastic scrotum, penis-like phallus (3 cm), and penoscrotal hypospadias. The patient was born to consanguineous parents, his karyotype was 46,XX, and SRY was negative...
January 12, 2018: Sexual Development: Genetics, Molecular Biology, Evolution, Endocrinology, Embryology, and Pathology of Sex Determination and Differentiation
https://www.readbyqxmd.com/read/29300862/reproductive-alterations-in-chronically-exposed-female-mice-to-environmentally-relevant-doses-of-a-mixture-of-phthalates-and-alkylphenols
#4
Daniel Patiño-García, Leonor Cruz-Fernandes, Julio Buñay, Jaime Palomino, Ricardo D Moreno
Endocrine-disrupting chemicals (EDCs) are exogenous compounds that modify hormone biosynthesis, causing adverse effects to human health. Among them, phthalates, and alkylphenols are important due to their wide use in plastics, detergents, personal care products, cosmetics and food packaging. However, their conjoint effects over reproductive female health have not been addressed. The aim of this work was to test the effect of chronically exposed female mice to a mixture of three phthalates [bis (2-ethylhexyl), dibutyl and benzyl butyl] and two alkylphenols [4-nonylphenol and 4-tert-octylphenol], from conception to adulthood at environmentally relevant doses...
December 28, 2017: Endocrinology
https://www.readbyqxmd.com/read/29282806/gene-expression-profiling-in-embryonic-chicken-ovary-during-asymmetric-development
#5
Amir Hossan Shaikat, Shoko Namekawa, Sadequllah Ahmadi, Misa Takeda, Takeshi Ohkubo
The reproductive system in female birds arises as bilateral asymmetrical anlagen, excluding the birds of prey. Earlier, histological and messenger RNA (mRNA) expression profile studies of several genes related to gonadal sex differentiation in chicken embryos tried to elucidate the query of this asymmetry in a scattered manner. To understand the matter precisely, we have focused on mRNA expression of a cohort of genes (FSHR, CYP19A1, caspase 3, caspase 8) in second half of the embryonic days (E10-E18). The established role of leptin in development of the embryo and its expression in the embryonic ovary also drove us to check leptin receptor (LEPR) expression in the ovary...
December 28, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/29248761/low-dose-metformin-exposure-causes-changes-in-expression-of-endocrine-disruption-associated-genes
#6
Nicholas J Niemuth, Rebecca D Klaper
The presence of intersex fish in watersheds around the world is a warning of the presence of anthropogenic endocrine-disrupting compounds (EDCs) being deposited into the aquatic environment. The anti-diabetic drug metformin is among the most prevalent and ubiquitous of the myriad pharmaceuticals found in wastewater effluent and watersheds worldwide. In addition to its prescription for type-2 diabetes, metformin is indicated as a treatment in cancers and the endocrine disorder polycystic ovarian syndrome (PCOS)...
December 8, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/29233229/effects-of-pi3k-and-fsh-on-steroidogenesis-viability-and-embryo-development-of-the-cumulus-oocyte-complex-after-in-vitro-culture
#7
Danielle Kaiser de Souza, Loise Pedrosa Salles, Ricardo Camargo, Laura Vanessa Mourão Gulart, Suellen Costa E Silva, Beatriz Dolabela de Lima, Fernando Araripe Gonçalves Torres, Alzira Amélia Martins Rosa E Silva
The purpose of this study was to evaluate the effects of FSH and PI3K on the nuclear maturation, viability, steroidogenesis and embryo development of bovine cumulus-oocyte complexes (COCs). Oocyte maturation was achieved with MIV B, MIV B+100 µM LY294002, MIV B+10 ng/mL follicle stimulating hormone (FSH), or MIV B+10 ng/mL FSH+100 µM LY294002 treatments for 22-24 h. After the cultured COCs were denuded, oocytes were separated into those that extruded polar bodies (mature) and those that did not, and real-time polymerase chain reaction (PCR) for BAX, BCL2, LHR, FSHR, CYP11A1, CYP19A1 and HSD17B1 genes was performed...
December 13, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/29228596/cyp19a1-polymorphisms-associated-with-coronary-artery-disease-and-circulating-sex-hormone-levels-in-a-chinese-population
#8
Yajie Meng, Dilare Adi, Yun Wu, Yongtao Wang, Mayila Abudoukelimu, Ding Huang, Xiang Ma, Cheng Liu, Ting Wang, Fen Liu, Bangdang Chen, Mintao Gai, Xiaocui Chen, Zhenyan Fu, Yitong Ma
Background: The relationship between CYP19A1 genetic polymorphisms and coronary artery disease (CAD) remains unclear. Thus, the aim of the present study was to investigate the association of CYP19A1 genetic polymorphisms with CAD in Han and Uygur populations and to characterize the association between the levels of sex hormones and aromatase with single-nucleotide polymorphisms (SNPs) in CYP19A1 genes in Chinese women. Results: There were significant differences in the genotype distributions of rs2236722 and rs4646 between CAD patients and control subjects in the Uygur population...
November 14, 2017: Oncotarget
https://www.readbyqxmd.com/read/29228205/associations-between-polymorphisms-in-genes-related-to-estrogen-metabolism-and-function-and-prostate-cancer-risk-results-from-the-prostate-cancer-prevention-trial
#9
Li Tang, Mary E Platek, Song Yao, Cathee Till, Phyllis J Goodman, Catherine M Tangen, Yue Wu, Elizabeth A Platz, Marian L Neuhouser, Frank Z Stanczyk, Juergen K V Reichardt, Regina M Santella, Ann Hsing, William D Figg, Scott M Lippman, Ian M Thompson, Christine B Ambrosone
Substantial preclinical data suggest estrogen's carcinogenic role in prostate cancer development; however, epidemiological evidence based on circulating estrogen levels is largely null. Compared with circulating estrogen, the intraprostatic estrogen milieu may play a more important role in prostate carcinogenesis. Using a nested case-control design in the Prostate Cancer Prevention Trial (PCPT), we examined associations of genetic variants of genes that are involved in estrogen synthesis, metabolism and function with prostate cancer risk...
December 8, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/29208485/lactational-exposure-of-polychlorinated-biphenyls-impairs-leydig-cellular-steroidogenesis-in-f1-progeny-rats
#10
Sathish Kumar Thangavelu, Sugantha Priya Elaiyapillai, Ilangovan Ramachandran, Ravi Sankar Bhaskaran, Arunakaran Jagadeesan
The present study was aimed to determine the effects of lactational exposure of PCBs (Aroclor 1254) on Leydig cellular steroidogenesis in F1 progeny rats. Lactating dams were orally treated by gavage with different doses of PCBs (1, 2 and 5mg/kg b.wt./day). Male progenies were sacrificed on PND60. Our results demonstrated that exposure to PCBs decreased the body weight, testis weight and anogenital distance (AGD) index in the F1 progeny rats. Importantly, PCBs exposure reduced the serum levels of LH, testosterone and estradiol...
December 2, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/29207342/accelerated-skin-wound-healing-by-selective-11%C3%AE-hydroxylase-cyp11b1-inhibitors
#11
Juliette Emmerich, Chris J van Koppen, Jens L Burkhart, Roger T Engeli, Qingzhong Hu, Alex Odermatt, Rolf W Hartmann
Previous studies have shown that inhibition of cortisol biosynthesis in skin leads to accelerated wound healing. Here, pyridylmethyl pyridine type 11β-hydroxylase (CYP11B1) inhibitors were optimized for topical application to avoid systemic side effects. The resulting very potent, non-toxic CYP11B1 inhibitor 14 (IC50 = 0.8 nM) exhibited good selectivity over 11β-HSD1, CYP17A1 and CYP19A1. The compound showed high stability toward human plasma (t1/2= > 150 min, as a substitute for wound fluid) and low stability toward HLS9 (t1/2 = 19 min) for rapid metabolic clearance after absorption...
November 21, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29206944/the-direct-and-indirect-effects-of-kisspeptin-54-on-granulosa-lutein-cell-function
#12
L A Owens, A Abbara, A Lerner, S O'floinn, G Christopoulos, S Khanjani, R Islam, K Hardy, A C Hanyaloglu, S A Lavery, W S Dhillo, S Franks
STUDY QUESTION: What are the in vivo and in vitro actions of kisspeptin-54 on the expression of genes involved in ovarian reproductive function, steroidogenesis and ovarian hyperstimulation syndrome (OHSS) in granulosa lutein (GL) cells when compared with traditional triggers of oocyte maturation? SUMMARY ANSWER: The use of kisspeptin-54 as an oocyte maturation trigger augmented expression of genes involved in ovarian steroidogenesis in human GL cells including, FSH receptor (FSHR), LH/hCG receptor (LHCGR), steroid acute regulatory protein (STAR), aromatase, estrogen receptors alpha and beta (ESR1, ESR2), 3-beta-hydroxysteroid dehydrogenase type 2 (3BHSD2) and inhibin A (INHBA), when compared to traditional maturation triggers, but did not alter markers of OHSS...
December 1, 2017: Human Reproduction
https://www.readbyqxmd.com/read/29196065/steroidogenic-enzymes-their-products-and-sex-steroid-receptors-during-testis-development-and-spermatogenesis-in-the-domestic-cat-felis-catus
#13
Beate C Braun, Minami W Okuyama, Karin Müller, Martin Dehnhard, Katarina Jewgenow
In the present study we comprehensively characterize intratesticular sex steroid production, metabolism and receptors in the domestic cat to elucidate the role of testosterone, estradiol and progesterone in testis development, steroid synthesis and spermatogenesis. There is a great demand for new concepts of fertility control in domestic (feral) cats and wild felids. The acquired knowledge will help to understand the regulation of spermatogenesis in felids, and may reveal new target points for male contraception...
November 28, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29183089/successful-treatment-of-estrogen-excess-in-primary-bilateral-macronodular-adrenocortical-hyperplasia-with-leuprolide-acetate
#14
Fady Hannah-Shmouni, Andreas G Moraitis, Vladimir Valera Romero, Fabio R Faucz, Spyridon A Mastroyannis, Annabel Berthon, Richard A Failor, Maria Merino, Andrew P Demidowich, Constantine A Stratakis
Primary bilateral macronodular adrenocortical hyperplasia (PBMAH) is an uncommon cause of adrenal Cushing syndrome (CS) in which cortisol and occasionally other steroid hormones can be secreted under the influence of aberrantly expressed G-protein coupled receptors (GPCRs) in the adrenal cortex. We describe the unique case of a 64-year-old postmenopausal female with PBMAH whose adrenal lesions expressed luteinizing hormone receptors (LHr). She presented initially with CS and underwent right adrenalectomy; a few years later she presented with macromastia and mastodynia, possibly due to estrogen excess from her remaining left adrenocortical masses...
November 28, 2017: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
https://www.readbyqxmd.com/read/29182028/altered-expression-of-lysophosphatidic-acid-receptors-in-association-with-the-synthesis-of-estrogens-and-androgens-in-type-1-endometrial-cancer-biology
#15
Tomasz Wasniewski, Izabela Woclawek-Potocka
To establish association between two main lysophosphatidic acid (LPA) receptors (LPAR2 and LPAR1) with the synthesis of estrogens and androgens in type-1 endometrial carcinoma (EC), we evaluated correlation of LPARs expression with expression of steroid 5 alpha-reductase 2 - aromatase (SRD5A2), or cytochrome P450 family 19 subfamily A member 1-5α-reductase (CYP19A1) in EC. Moreover, we aimed to investigate SRD5A2 and CYP19A1 expression in type 1 endometrial cancer and normal endometrium with its correlation to selected clinicopathological features...
November 28, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/29169052/estrogenic-and-anti-androgenic-effects-of-the-herbicide-tebuthiuron-in-male-nile-tilapia-oreochromis-niloticus
#16
Milena Devechi de Almeida, Thiago Scremin Boscolo Pereira, Sergio Ricardo Batlouni, Camila Nomura Pereira Boscolo, Eduardo Alves de Almeida
Tebuthiuron is a phenylurea herbicide widely used in agriculture that can reach the aquatic environments, possibly posing negative effects to the aquatic biota. Phenylurea herbicides, such as diuron, are known to cause estrogenic and anti-androgenic effects in fish, but no such effects were yet reported for tebuthiuron exposure. Thus, the aim of this study was to evaluate if tebuthiuron, at environmentally relevant concentrations (100 and 200ng/L) and after 25days of exposure have estrogenic and/or anti-androgenic effects on male of Nile tilapia (Oreochromis niloticus), through the evaluation of plasmatic testosterone (T) and estradiol (E2) levels, brain aromatase (CYP19) levels (western-blot), and by evaluating the histology of the testicles...
November 14, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/29157197/selection-for-female-traits-of-high-fertility-affects-male-reproductive-performance-and-alters-the-testicular-transcriptional-profile
#17
Marten Michaelis, Alexander Sobczak, Dirk Koczan, Martina Langhammer, Norbert Reinsch, Jennifer Schoen, Joachim M Weitzel
BACKGROUND: Many genes important for reproductive performance are shared by both sexes. However, fecundity indices are primarily based on female parameters such as litter size. We examined a fertility mouse line (FL2), which has a considerably increased number of offspring and a total litter weight of 180% compared to a randomly bred control line (Ctrl) after more than 170 generations of breeding. In the present study, we investigated whether there might be a parallel evolution in males after more than 40 years of breeding in this outbred mouse model...
November 21, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29150243/effects-of-n-carbamylglutamate-and-l-arginine-on-steroidogenesis-and-gene-expression-in-bovine-granulosa-cells
#18
T Feng, L F Schütz, B C Morrell, M C Perego, L J Spicer
Feeding N-carbamylglutamate (NCG) and arginine (ARG) improves reproductive measures in pigs and reduces systemic steroid levels in pregnant ewes. We hypothesized that the effects of NCG and ARG on reproduction were due to direct effects on the ovary. Thus, the objectives of this study were to investigate the effects of NCG and ARG on granulosa cell (GC) steroidogenesis, gene expression, and cell proliferation in vitro. GC were collected from small (1-5mm) bovine follicles and treated in vitro with NCG or ARG in serum-free medium for 24h to 48h...
November 10, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/29131373/differentially-expressed-mirna-210-during-follicular-luteal-transition-regulates-pre-ovulatory-granulosa-cell-function-targeting-hras-and-efna3
#19
Astha Shukla, Sunita Dahiya, Suneel Kumar Onteru, Dheer Singh
Ovarian folliculogenesis, ovulation and luteinization are an important prerequisite for fertility performance in mammals. Spatial and temporal key factors and proteins for their regulation are well known. Recent advancement in the field of molecular biology led to the discovery of another class of gene regulators, microRNA (miRNA). Previous studies on profiling of miRNA in buffalo ovaries revealed that miRNA-210 (miR-210) is differently expressed in follicular-luteal transition. Therefore, the present study was planned to ascertain the role of miR-210 in buffalo granulosa cells...
November 13, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29113261/rs1008805-polymorphism-of-cyp19a1-gene-is-associated-with-the-efficacy-of-hormone-therapy-in-stage-i-ii-and-operable-stage-iii-breast-cancer
#20
Xiying Shao, Lei Luo, Yong Guo, Xiaohong Xu, Dehou Deng, Jianguo Feng, Yuheng Ding, Hanzhou Mou, Ping Huang, Lei Shi, Yuan Huang, Weiwu Ye, Caijin Lou, Zhanhong Chen, Yabing Zheng, Xiaojia Wang
It has been hypothesized that single nucleotide polymorphisms in CYP19A1 gene may alter aromatase activity and circulating steroid hormone levels in females. Therefore, it is biologically reasonable that CYP19A1 rs1008805 (A/G) polymorphism may be associated with the clinical outcome of hormone therapy. Genotyping for the CYP19A1 rs1008805 polymorphism was performed for 287 females with hormone receptor (HR)-positive early breast cancer, and potential associations were evaluated between CYP19A1 rs1008805 genotypes and disease-free survival (DFS)...
November 2017: Oncology Letters
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