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https://www.readbyqxmd.com/read/28391539/interactions-between-dietary-acrylamide-intake-and-genes-for-ovarian-cancer-risk
#1
Janneke G F Hogervorst, Piet A van den Brandt, Roger W L Godschalk, Frederik-Jan van Schooten, Leo J Schouten
Some epidemiological studies observed a positive association between dietary acrylamide intake and ovarian cancer risk but the causality needs to be substantiated. By analyzing gene-acrylamide interactions for ovarian cancer risk for the first time, we aimed to contribute to this. The prospective Netherlands Cohort Study on diet and cancer includes 62,573 women, aged 55-69 years. At baseline in 1986, a random subcohort of 2589 women was sampled from the total cohort for a case cohort analysis approach. Dietary acrylamide intake of subcohort members and ovarian cancer cases (n = 252, based on 20...
April 8, 2017: European Journal of Epidemiology
https://www.readbyqxmd.com/read/28333263/loss-of-luteotropic-prostaglandin-e-plays-an-important-role-in-the-regulation-of-luteolysis-in-women
#2
Junko Nio-Kobayashi, Masataka Kudo, Noriaki Sakuragi, Toshihiko Iwanaga, W Colin Duncan
STUDY QUESTION: Do intraluteal prostaglandins (PG) contribute to luteal regulation in women? SUMMARY ANSWER: Prostaglandin E (PGE), which is produced in human granulosa-lutein cells stimulated with luteotropic hCG, exerts similar luteotropic effects to hCG, and the expression of PG synthetic and metabolic enzymes in the human CL is driven toward less PGE but more prostaglandin F (PGF) during luteolysis. WHAT IS KNOWN ALREADY: Uterine PGF is a major luteolysin in many non-primate species but not in women...
March 17, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28261840/feeding-hydroalcoholic-extract-powder-of-lepidium-meyenii-maca-enhances-testicular-gene-expression-of-3%C3%AE-hydroxysteroid-dehydrogenase-in-rats
#3
Y Ohta, N Kawate, T Inaba, H Morii, K Takahashi, H Tamada
Although feeding diets containing the extract powder of Lepidium meyenii (maca), a plant growing in Peru's Central Andes, increases serum testosterone concentration associated with enhanced ability of testosterone production by Leydig cells in male rats, changes in testicular steroidogenesis-related factors by the maca treatment are not known. This study examined the effects of maca on testicular gene expressions for luteinizing hormone receptor, steroidogenic acute regulatory protein and steroidogenic enzymes...
March 6, 2017: Andrologia
https://www.readbyqxmd.com/read/28208175/independent-validation-of-effect-of-hsd3b1-genotype-on-response-to-androgen-deprivation-therapy-in-prostate-cancer
#4
Neeraj Agarwal, Andrew W Hahn, David M Gill, James M Farnham, Austin I Poole, Lisa Cannon-Albright
No abstract text is available yet for this article.
February 16, 2017: JAMA Oncology
https://www.readbyqxmd.com/read/28027903/seasonal-changes-and-sexual-dimorphism-in-gene-expression-of-star-protein-steroidogenic-enzymes-and-sex-hormone-receptors-in-the-frog-brain
#5
Alessandra Santillo, Sara Falvo, Maria Maddalena Di Fiore, Gabriella Chieffi Baccari
The brain of amphibians contains all the key enzymes of steroidogenesis and has a high steroidogenic activity. In seasonally-breeding amphibian species brain steroid levels fluctuate synchronously with the reproductive cycle. Here we report a study of gene expression of StAR protein, key steroidogenic enzymes and sex hormone receptors in the telencephalon (T) and diencephalon-mesencephalon (D-M) of male and female reproductive and post-reproductive Pelophylax esculentus, a seasonally breeding anuran amphibian...
December 24, 2016: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/27979506/re-hsd3b1-and-resistance-to-androgen-deprivation-therapy-in-prostate-cancer-a-retrospective-multicohort-study
#6
Samir S Taneja
No abstract text is available yet for this article.
January 2017: Journal of Urology
https://www.readbyqxmd.com/read/27893427/cholesterol-import-and-steroidogenesis-are-biosignatures-for-gastric-cancer-patient-survival
#7
Wei-Chun Chang, Shang-Fen Huang, Yang-Ming Lee, Hsueh-Chou Lai, Bi-Hua Cheng, Wei-Chung Cheng, Jason Yen-Ping Ho, Long-Bin Jeng, Wen-Lung Ma
Androgens, estrogens, progesterone and related signals are reported to be involved in the pathology of gastric cancer. However, varied conclusions exist based on serum hormone levels, receptor expressions, and in vitro or in vivo studies. This report used a web-based gene survival analyzer to evaluate biochemical processes, including cholesterol importing via lipoprotein/receptors (L/R route), steroidogenic enzymes, and steroid receptors, in gastric cancer patients prognosis. The sex hormone receptors (androgen receptor, progesterone receptor, and estrogen receptor ESR1 or ESR2), L/R route (low/high-density lipoprotein receptors, LDLR/LRP6/SR-B1 and lipoprotein lipase, LPL) and steroidogenic enzymes (CYP11A1, HSD3B1, CYP17, HSD17B1, HSD3B1, CYP19A1 and SRD5A1) were associated with 5-year survival of gastric cancer patients...
January 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/27813053/elevated-steroid-hormone-production-in-the-db-db-mouse-model-of-obesity-and-type-2-diabetes
#8
Anja Hofmann, Mirko Peitzsch, Coy Brunssen, Jennifer Mittag, Annett Jannasch, Annika Frenzel, Nicholas Brown, Steven M Weldon, Graeme Eisenhofer, Stefan R Bornstein, Henning Morawietz
Obesity and type 2 diabetes have become a major public health problem worldwide. Steroid hormone dysfunction appears to be linked to development of obesity and type 2 diabetes and correction of steroid abnormalities may offer new approaches to therapy. We therefore analyzed plasma steroids in 15-16 week old obese and diabetic db/db mice using liquid chromatography-tandem mass spectrometry. Lean db/+ served as controls. Db/db mice developed obesity, hyperglycemia, hyperleptinemia, and hyperlipidemia. Hepatic triglyceride storage was increased and adiponectin and pancreatic insulin were lowered...
January 2017: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
https://www.readbyqxmd.com/read/27803898/candidate-gene-expression-in-bos-indicus-ovarian-tissues-prepubertal-and-postpubertal-heifers-in-diestrus
#9
Mayara Morena Del Cambre Amaral Weller, Marina Rufino S Fortes, Laercio R Porto-Neto, Matthew Kelly, Bronwyn Venus, Lisa Kidd, João Paulo Arcelino do Rego, Sophia Edwards, Gry B Boe-Hansen, Emily Piper, Sigrid A Lehnert, Simone Eliza Facioni Guimarães, Stephen Stewart Moore
Growth factors such as bone morphogenetic proteins 6, 7, 15, and two isoforms of transforming growth factor-beta (BMP6, BMP7, BMP15, TGFB1, and TGFB2), and insulin-like growth factor system act as local regulators of ovarian follicular development. To elucidate if these factors as well as others candidate genes, such as estrogen receptor 1 (ESR1), growth differentiation factor 9 (GDF9), follicle-stimulating hormone receptor (FSHR), luteinizing hormone receptor (LHR), bone morphogenetic protein receptor, type 2 (BMPR2), type 1 insulin-like growth factor receptor (IGFR1), and key steroidogenic enzymes cytochrome P450 aromatase and 3-β-hydroxysteroid dehydrogenase (CYP19A1 and HSD3B1) could modulate or influence diestrus on the onset of puberty in Brahman heifers, their ovarian mRNA expression was measured before and after puberty (luteal phase)...
2016: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/27802415/genome-wide-and-gene-based-meta-analyses-identify-novel-loci-influencing-blood-pressure-response-to-hydrochlorothiazide
#10
Erika Salvi, Zhiying Wang, Federica Rizzi, Yan Gong, Caitrin W McDonough, Sandosh Padmanabhan, Timo P Hiltunen, Chiara Lanzani, Roberta Zaninello, Martina Chittani, Kent R Bailey, Antti-Pekka Sarin, Matteo Barcella, Olle Melander, Arlene B Chapman, Paolo Manunta, Kimmo K Kontula, Nicola Glorioso, Daniele Cusi, Anna F Dominiczak, Julie A Johnson, Cristina Barlassina, Eric Boerwinkle, Rhonda M Cooper-DeHoff, Stephen T Turner
This study aimed to identify novel loci influencing the antihypertensive response to hydrochlorothiazide monotherapy. A genome-wide meta-analysis of blood pressure (BP) response to hydrochlorothiazide was performed in 1739 white hypertensives from 6 clinical trials within the International Consortium for Antihypertensive Pharmacogenomics Studies, making it the largest study to date of its kind. No signals reached genome-wide significance (P<5×10(-)(8)), and the suggestive regions (P<10(-5)) were cross-validated in 2 black cohorts treated with hydrochlorothiazide...
January 2017: Hypertension
https://www.readbyqxmd.com/read/27746313/progressive-effects-of-silver-nanoparticles-on-hormonal-regulation-of-reproduction-in-male-rats
#11
K Dziendzikowska, A Krawczyńska, M Oczkowski, T Królikowski, K Brzóska, A Lankoff, M Dziendzikowski, T Stępkowski, M Kruszewski, J Gromadzka-Ostrowska
The growing use of silver nanoparticles (AgNPs) in various applications, including consumer, agriculture and medicine products, has raised many concerns about the potential risks of nanoparticles (NPs) to human health and the environment. An increasing body of evidence suggests that AgNPs may have adverse effects of humans, thus the aim of this study was to investigate the effects of AgNPs on the male reproductive system. Silver particles (20nm AgNPs (groups Ag I and Ag II) and 200nm Ag sub-micron particles (SPs) (group Ag III)) were administered intravenously to male Wistar rats at a dose of 5 (groups Ag I and Ag III) or 10 (group Ag II) mg/kg of body weight...
December 15, 2016: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/27673747/regulation-of-development-of-rat-stem-and-progenitor-leydig-cells-by-activin
#12
L Li, Y Wang, X Li, S Liu, G Wang, H Lin, Q Zhu, J Guo, H Chen, H-S Ge, R-S Ge
Stem Leydig cells have been demonstrated to differentiate into adult Leydig cells via intermediate stages of progenitor and immature Leydig cells. However, the exact regulatory mechanisms are unclear. We hypothesized that the development of stem or progenitor Leydig cells depends upon locally produced growth factors. Microarray analysis revealed that the expression levels of activin type I receptor (Acvr1) and activin A receptor type II-like 1 (Acvrl1) were stem > progenitor = immature = adult Leydig cells...
January 2017: Andrology
https://www.readbyqxmd.com/read/27644933/prostate-cancer-hsd3b1-variant-confers-inferior-adt-outcomes
#13
Peter Sidaway
No abstract text is available yet for this article.
November 2016: Nature Reviews. Urology
https://www.readbyqxmd.com/read/27575027/hsd3b1-and-resistance-to-androgen-deprivation-therapy-in-prostate-cancer-a-retrospective-multicohort-study
#14
Jason W D Hearn, Ghada AbuAli, Chad A Reichard, Chandana A Reddy, Cristina Magi-Galluzzi, Kai-Hsiung Chang, Rachel Carlson, Laureano Rangel, Kevin Reagan, Brian J Davis, R Jeffrey Karnes, Manish Kohli, Donald Tindall, Eric A Klein, Nima Sharifi
BACKGROUND: HSD3B1 (1245A>C) has been mechanistically linked to castration-resistant prostate cancer because it encodes an altered enzyme that augments dihydrotestosterone synthesis from non-gonadal precursors. We postulated that men inheriting the HSD3B1 (1245C) allele would exhibit resistance to androgen-deprivation therapy (ADT). METHODS: In this multicohort study, we determined HSD3B1 genotype retrospectively in men treated with ADT for post-prostatectomy biochemical failure and correlated genotype with long-term clinical outcomes...
October 2016: Lancet Oncology
https://www.readbyqxmd.com/read/27575026/inherited-hsd3b1-polymorphisms-and-hormonal-therapy-resistance
#15
Emmanuel S Antonarakis
No abstract text is available yet for this article.
October 2016: Lancet Oncology
https://www.readbyqxmd.com/read/27512005/effect-of-adiponectin-on-the-steroidogenic-acute-regulatory-protein-p450-side-chain-cleavage-enzyme-and-3%C3%AE-hydroxysteroid-dehydrogenase-gene-expression-progesterone-and-androstenedione-production-by-the-porcine-uterus-during-early-pregnancy
#16
N Smolinska, K Dobrzyn, M Kiezun, K Szeszko, A Maleszka, T Kaminski
Adiponectin and its receptors are expressed in the human and porcine uterus and this endocrine system has important role in the regulation of reproductive processes. The expression of steroidogenic acute regulatory protein (StAR) and 3β-hydroxysteroid dehydrogenase (HSD3B1) were observed in the human and porcine uterus during the oestrous cycle and pregnancy. The de novo synthesis of steroids in the uterus might be a crucial factor for effective implantation and maintenance of pregnancy. We hypothesized that adiponectin modulates the expression of key enzymes in the synthesis of the steroids: StAR, P450 side chain cleavage enzyme (CYP11A1) and HSD3B1, as well as progesterone (P4) and androstenedione (A4) secretion by the porcine uterus...
June 2016: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/27439492/clock-genes-and-salt-sensitive-hypertension-a-new-type-of-aldosterone-synthesizing-enzyme-controlled-by-the-circadian-clock-and-angiotensin-ii
#17
Hitoshi Okamura, Masao Doi, Kaoru Goto, Rika Kojima
With the current societal norm of shiftwork and long working hours, maintaining a stable daily life is becoming very difficult. An irregular lifestyle disrupts circadian rhythms, resulting in the malfunction of body physiology and ultimately leading to lifestyle-related diseases, including hypertension. By analyzing completely arrhythmic Cry1/Cry2 double-knockout (Cry-null) mice, we found salt-sensitive hypertension accompanied by hyperaldosteronism. On the basis of a DNA microarray analysis of the adrenal gland and subsequent biochemical analyses, we discovered that Hsd3b6/HSD3B1, a subtype of 3β-HSD, is markedly overexpressed in aldosterone-producing cells in the Cry-null adrenal cortex...
October 2016: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/27388148/effects-of-butylated-hydroxyanisole-on-the-steroidogenesis-of-rat-immature-leydig-cells
#18
Xiaoheng Li, Shuyan Cao, Baiping Mao, Yanfang Bai, Xiaomin Chen, Xiudi Wang, Ying Wu, Linxi Li, Han Lin, Qingquan Lian, Ping Huang, Ren-Shan Ge
Butylated hydroxyanisole (BHA) is a synthetic antioxidant used for food preservation. Whether BHA affects testosterone biosynthesis is still unclear. The effects of BHA on the steroidogenesis in rat immature Leydig cells were investigated. Rat immature Leydig cells were isolated from 35-old-day rats and cultured with BHA (50 μM) for 3 h in combination with 22R-OH-cholesterol, pregnenolone, progesterone, androstenedione, testosterone or dihydrotestosterone, and the concentrations of 5α-androstanediol and testosterone in the media were measured...
September 2016: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/27148549/comparison-of-the-effects-of-dibutyl-and-monobutyl-phthalates-on-the-steroidogenesis-of-rat-immature-leydig-cells
#19
Linxi Li, Xiaomin Chen, Guoxin Hu, Sicong Wang, Renai Xu, Qiqi Zhu, Xiaoheng Li, Mingcang Wang, Qing-Quan Lian, Ren-Shan Ge
Dibutyl phthalate (DBP) is a widely used synthetic phthalic diester and monobutyl phthalate (MBP) is its main metabolite. DBP can be released into the environment and potentially disrupting mammalian male reproductive endocrine system. However, the potencies of DBP and MBP to inhibit Leydig cell steroidogenesis and their possible mechanisms are not clear. Immature Leydig cells isolated from rats were cultured with 0.05-50 μM DBP or MBP for 3 h in combination with testosterone synthesis regulator or intermediate...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27128796/gossypol-inhibits-lh-induced-steroidogenesis-in-bovine-theca-cells
#20
Thet Su Myat, Masafumi Tetsuka
Gossypol, a polyphenolic aldehyde found in cottonseed, has been shown to perturb steroidogenesis in granulosa and luteal cells of rats, pigs and cattle. However, little is known about the direct effect of gossypol on theca cell functions in any species. The present study was conducted to investigate the effect of gossypol on the steroidogenesis and the expression of genes involved in it in cultured bovine theca cells. Theca cells were isolated from healthy preovulatory follicles and were cultured in the presence of luteinizing hormone (LH) for up to 7 days...
January 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
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