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https://www.readbyqxmd.com/read/28934726/application-of-adverse-outcome-pathways-to-u-s-epa-s-endocrine-disruptor-screening-program
#1
REVIEW
Patience Browne, Pamela D Noyes, Warren M Casey, David J Dix
BACKGROUND: The U.S. EPA's Endocrine Disruptor Screening Program (EDSP) screens and tests environmental chemicals for potential effects in estrogen, androgen, and thyroid hormone pathways, and it is one of the only regulatory programs designed around chemical mode of action. OBJECTIVES: This review describes the EDSP's use of adverse outcome pathway (AOP) and toxicity pathway frameworks to organize and integrate diverse biological data for evaluating the endocrine activity of chemicals...
September 1, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28934723/neural-mechanisms-underlying-the-disruption-of-male-courtship-behavior-by-adult-exposure-to-di-2-ethylhexyl-phthalate-in-mice
#2
Carlos Dombret, Daphné Capela, Kevin Poissenot, Caroline Parmentier, Emma Bergsten, Cédric Pionneau, Solenne Chardonnet, Hélène Hardin-Pouzet, Valérie Grange-Messent, Matthieu Keller, Isabelle Franceschini, Sakina Mhaouty-Kodja
BACKGROUND: Courtship behavior plays a critical role in attracting females and reproduction success. However, the effects of exposure to a ubiquitous contaminant di(2-ethylhexyl) phthalate (DEHP) on these behaviors and, in particular, on courtship vocalizations have not been examined. OBJECTIVE: The effects of adult exposure to DEHP on courtship and mating behaviors and gonadotropic axis and neural mechanisms involved in DEHP-induced effects were analyzed in male mice...
September 1, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28933733/melatonin-decreases-glucose-metabolism-in-prostate-cancer-cells-a-13-c-stable-isotope-resolved-metabolomic-study
#3
David Hevia, Pedro Gonzalez-Menendez, Mario Fernandez-Fernandez, Sergio Cueto, Pablo Rodriguez-Gonzalez, Jose I Garcia-Alonso, Juan C Mayo, Rosa M Sainz
The pineal neuroindole melatonin exerts an exceptional variety of systemic functions. Some of them are exerted through its specific membrane receptors type 1 and type 2 (MT1 and MT2) while others are mediated by receptor-independent mechanisms. A potential transport of melatonin through facilitative glucose transporters (GLUT/SLC2A) was proposed in prostate cancer cells. The prostate cells have a particular metabolism that changes during tumor progression. During the first steps of carcinogenesis, oxidative phosphorylation is reactivated while the switch to the "Warburg effect" only occurs in advanced tumors and in the metastatic stage...
July 26, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28932300/androgen-receptor-expression-in-epithelial-and-stromal-cells-of-prostatic-carcinoma-and-benign-prostatic-hyperplasia
#4
Vanja Filipovski, Katerina Kubelka-Sabit, Dzengis Jasar, Vesna Janevska
BACKGROUND: Prostatic carcinoma (PCa) derives from prostatic epithelial cells. However stromal microenvironment, associated with malignant epithelium, also plays a role in prostatic carcinogenesis. Alterations in prostatic stromal cells contribute to the loss of growth control in epithelial cells that lead to progression of PCa. AIM: To analyse the differences between Androgen Receptor (AR) expression in both epithelial and stromal cells in PCa and the surrounding benign prostatic hyperplasia (BPH) and to compare the results with tumour grade...
August 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28932059/prevalence-of-nutritional-deficiencies-in-hair-loss-among-indian-participants-results-of-a-cross-sectional-study
#5
Dinesh Gowda, V Premalatha, D B Imtiyaz
BACKGROUND: Nutritional deficiencies are known to be associated with hair loss; however, the exact prevalence is not known. AIMS: The aim of this study is to evaluate the prevalence of nutritional deficiencies in participants with hair loss. MATERIALS AND METHODS: In this cross-sectional study, 100 enrolled participants were divided into telogen effluvium (TE), male-pattern hair loss (MPHL), and female-pattern hair loss (FPHL) based on the type of hair loss...
July 2017: International Journal of Trichology
https://www.readbyqxmd.com/read/28931848/integrated-analysis-of-microrna-and-mrna-expression-profiles-during-the-sex-differentiation-sensitive-period-in-oriental-river-prawn-macrobrachium-nipponense
#6
Shubo Jin, Hongtuo Fu, Shengming Sun, Sufei Jiang, Yiwei Xiong, Yongsheng Gong, Hui Qiao, Wenyi Zhang, Yan Wu
Male oriental river prawns (Macrobrachium nipponense) grow faster than females, and therefore, reach larger sizes by harvest time. Histological observations have indicated that the sex-differentiation sensitive period (which includes the formation of the androgenic gland, the testis, and the ovary) is from post-larvae (PL) developmental stage for M. nipponense. In this study, we prepared four microRNA (miRNA) and mRNA libraries using samples collected from sex-differentiation sensitive period (PL7 to PL16) to perform RNA-sequencing for identifying sex-related candidate miRNAs, genes, and metabolic pathways...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28931575/case-report-of-clitoral-hypertrophy-in-2-extremely-premature-girls-with-an-ovarian-cyst
#7
Anne-Laure Nerré, Pierre Bétrémieux, Sylvie Nivot-Adamiak
Neonatal clitoromegaly is mainly attributed to in utero androgen exposure secondary to congenital adrenal hyperplasia. We report on 2 extremely premature girls with clitoromegaly, increased androgen levels, no salt wasting syndrome, and ovarian cyst. In case 1, the cyst liquid was aspired during ovarian hernia surgery and revealed high androgen levels. After aspiration, serum androgen levels decreased, as did clitoral size. In case 2, an ovarian cyst was seen on pelvic ultrasound. Aspiration was not indicated...
September 20, 2017: Pediatrics
https://www.readbyqxmd.com/read/28931495/a-review-of-sarcopenia-enhancing-awareness-of-an-increasingly-prevalent-disease
#8
REVIEW
Eric Marty, Yi Liu, Andre Samuel, Omer Or, Joseph Lane
Sarcopenia is defined as an age associated decline in skeletal muscle mass. The pathophysiology of sarcopenia is multifactorial, with decreased caloric intake, muscle fiber denervation, intracellular oxidative stress, hormonal decline, and enhanced myostatin signaling all thought to contribute. Prevalence rates are as high as 29% and 33% in community dwelling and long-term care populations, respectively, with advanced age, low body mass index, and low physical activity as significant risk factors. Sarcopenia shares many characteristics with other disease states typically associated with risk of fall and fracture, including osteoporosis, frailty, and obesity...
September 17, 2017: Bone
https://www.readbyqxmd.com/read/28931292/-salvage-lymph-node-dissection-in-radical-prostatectomy-failure-a-case-study
#9
N Marečková, M Staník, D Macík, J Doležel
Salvage lymph node dissection is a therapeutic option in patients with nodal-only recurrence after radical prostatectomy. Although this operation does not achieve a complete cure in the majority of cases, it can prolong survival and help postpone hormonal therapy in selected patients while being a relatively safe procedure. The authors describe a case study of a radical prostatectomy patient with radiologically proven recurrence of prostate cancer limited to an internal iliac node. He underwent salvage lymph node dissection with a complete biochemical response...
2017: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://www.readbyqxmd.com/read/28930614/inter-species-functional-interactome-of-nuclear-steroid-receptors-r1
#10
Styliani A Geronikolou, Athanasia Pavlopoulou, Christina Kanaka-Gantenbein, George Chrousos
Steroids exert their actions by binding to the glucocorticoid, mineralocorticoid, androgen, estrogen and progesterone classes of receptors. Despite an exponential increase in our knowledge of steroid receptors, their interactions with other molecules, subcellular location and functions still need further elucidation. To unravel the mechanism(s) of action of the steroid hormones, as well as the function of their cognate nuclear receptors, an interaction network was created (henceforth referred to as "R1 Interactome")- illustrating that robust interactions have been preserved in rodents, frog, zebra fish and drosophila...
January 1, 2018: Frontiers in Bioscience (Elite Edition)
https://www.readbyqxmd.com/read/28930493/effect-of-comorbidity-on-prostate-cancer-specific-mortality-a-prospective-observational-study
#11
Prabhakar Rajan, Prasanna Sooriakumaran, Tommy Nyberg, Olof Akre, Stefan Carlsson, Lars Egevad, Gunnar Steineck, N Peter Wiklund
Purpose To determine the effect of comorbidity on prostate cancer (PCa)-specific mortality across treatment types. Patients and Methods These are the results of a population-based observational study in Sweden from 1998 to 2012 of 118,543 men who were diagnosed with PCa with a median follow-up of 8.3 years (interquartile range, 5.2 to 11.5 years) until death from PCa or other causes. Patients were categorized by patient characteristics (marital status, educational level) and tumor characteristics (serum prostate-specific antigen, tumor grade and clinical stage) and by treatment type (radical prostatectomy, radical radiotherapy, androgen deprivation therapy, and watchful waiting)...
September 20, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28929646/-research-progress-in-mechanism-of-traditional-chinese-medicine-treatment-of-polycystic-ovary-syndrome
#12
REVIEW
Xian-Ying Zhou, Li Zhou, Zu-Yue Sun
Polycystic ovary syndrome (PCOS) is a heterogeneous endocrine disorder, which is characterized by hyperandrogenism, insulin resistance and chronic anovulation, and has become a serious threat to the health of adolescents and women of childbearing age.At present,lowering androgen, improving insulin resistance and inducing ovulation are the main methods adopted by doctors to treat the disease, but the adverse reactions of the western medicine and the long-term treatment are hard to be accepted by the patients...
October 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28929436/endogenous-sex-hormone-exposure-and-repetitive-element-dna-methylation-in-healthy-postmenopausal-women
#13
Devon J Boyne, Christine M Friedenreich, John B McIntyre, Frank Z Stanczyk, Kerry S Courneya, Will D King
PURPOSE: Epigenetic mechanisms may help to explain the complex and heterogeneous relation between sex hormones and cancer. Few studies have investigated the effects of sex hormones on epigenetic markers related to cancer risk such as levels of methylation within repetitive DNA elements. Our objective was to describe the association between endogenous sex hormone exposure and levels of LINE-1 and Alu methylation in healthy postmenopausal women. METHODS: We nested a cross-sectional study within the Alberta Physical Activity and Breast Cancer Prevention Trial (2003-2006)...
September 19, 2017: Cancer Causes & Control: CCC
https://www.readbyqxmd.com/read/28929349/depression-and-anxiety-in-polycystic-ovary-syndrome-etiology-and-treatment
#14
REVIEW
Laura G Cooney, Anuja Dokras
PURPOSE OF REVIEW: Polycystic ovary syndrome (PCOS) is the most common endocrine disorder in reproductive age women and is associated with an increased prevalence of depression and anxiety symptoms. This review presents potential mechanisms for this increased risk and outlines treatment options. RECENT FINDINGS: Women with PCOS have increased odds of depressive symptoms (OR 3.78; 95% CI 3.03-4.72) and anxiety symptoms (OR 5.62; 95% CI 3.22-9.80). Obesity, insulin resistance, and elevated androgens may partly contribute to this association...
September 20, 2017: Current Psychiatry Reports
https://www.readbyqxmd.com/read/28928821/involvement-of-estrogen-receptor-%C3%AE-in-androgen-receptor-induced-growth-inhibition-in-prostate-cancer-pc-3-cells
#15
Long Xiao, Minhui Xiao, Linbo Gao, Wanchao Xu
Previous studies have suggested that changes in sex hormone receptor expression may be associated with the initiation and progression of prostate cancer (PCa). Therefore, the present study aimed to investigate the association and possible pathways between two sex hormone receptors and PCa by measuring the expression levels of the androgen receptor (AR) and the estrogen receptor subtypes alpha (ERα) and beta (ERβ) in prostatic cancer PC-3 cell lines. The pcDNA3.1-hERβ plasmid was transfected into PC-3 cell lines...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28928807/effects-of-low-dose-of-bisphenol-a-on-the-proliferation-and-mechanism-of-primary-cultured-prostate-epithelial-cells-in-rodents
#16
Dongyan Huang, Jianhui Wu, Xin Su, Han Yan, Zuyue Sun
Bisphenol A (BPA) is a well-known endocrine disruptor compound (EDC) that aggravates testosterone-induced benign prostate hyperplasia by increasing the relative weight of the ventral and dorsolateral prostate in rats. This phenomenon is primarily attributed to the exogenous estrogen effect of BPA. However, the direct effect of BPA on prostate cells has not been characterized. The present study investigated the proliferative effect and possible mechanisms of action of BPA on the prostatic epithelium of rats...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28928467/cross-talk-between-mir-471-5p-and-autophagy-component-proteins-regulates-lc3-associated-phagocytosis-lap-of-apoptotic-germ-cells
#17
Subbarayalu Panneerdoss, Suryavathi Viswanadhapalli, Nourhan Abdelfattah, Benjamin C Onyeagucha, Santosh Timilsina, Tabrez A Mohammad, Yidong Chen, Michael Drake, Kristiina Vuori, T Rajendra Kumar, Manjeet K Rao
Phagocytic clearance of apoptotic germ cells by Sertoli cells is vital for germ cell development and differentiation. Here, using a tissue-specific miRNA transgenic mouse model, we show that interaction between miR-471-5p and autophagy member proteins regulates clearance of apoptotic germ cells via LC3-associated phagocytosis (LAP). Transgenic mice expressing miR-471-5p in Sertoli cells show increased germ cell apoptosis and compromised male fertility. Those effects are due to defective engulfment and impaired LAP-mediated clearance of apoptotic germ cells as miR-471-5p transgenic mice show lower levels of Dock180, LC3, Atg12, Becn1, Rab5 and Rubicon in Sertoli cells...
September 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28928128/targeting-a-single-alternative-polyadenylation-site-coordinately-blocks-expression-of-androgen-receptor-mrna-splice-variants-in-prostate-cancer
#18
Jamie L Van Etten, Michael Nyquist, Yingming Li, Rendong Yang, Yeung Ho, Rachel Johnson, Olivia Ondigi, Daniel F Voytas, Christine Henzler, Scott M Dehm
Prostate cancer is the second leading cause of male cancer deaths due to disease progression to castration-resistant prostate cancer (CRPC). Androgen receptor (AR) splice variants including AR-V7 function as constitutively active transcription factors in CRPC cells, thereby promoting resistance to AR-targeted therapies. To date, there are no AR variant-specific treatments for CRPC. Here we report that the splicing of AR variants AR-V7 as well as AR-V1 and AR-V9 is regulated coordinately by a single polyadenylation signal in AR intron 3...
August 15, 2017: Cancer Research
https://www.readbyqxmd.com/read/28927900/expression-of-glucocorticoid-receptor-is-associated-with-aggressive-primary-endometrial-cancer-and-increases-from-primary-to-metastatic-lesions
#19
Ingvild L Tangen, Jennifer Taylor Veneris, Mari K Halle, Henrica M Werner, Jone Trovik, Lars A Akslen, Helga B Salvesen, Suzanne D Conzen, Gini F Fleming, Camilla Krakstad
BACKGROUND: Glucocorticoid receptor (GR) has emerged as an important steroid nuclear receptor in hormone dependent cancers, however few data are available regarding a potential role of GR in endometrial cancer. The aim of this study was to investigate expression of GR in primary and metastatic endometrial cancer lesions, and to assess the relationship between GR expression and clinical and histopathological variables and survival. METHODS: Expression of GR was investigated by IHC in 724 primary tumors and 289 metastatic lesions (from 135 patients), and correlations with clinical and histopathological data and survival were explored...
September 16, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28927585/whole-genome-and-transcriptome-sequencing-of-prostate-cancer-identify-new-genetic-alterations-driving-disease-progression
#20
Shancheng Ren, Gong-Hong Wei, Dongbing Liu, Liguo Wang, Yong Hou, Shida Zhu, Lihua Peng, Qin Zhang, Yanbing Cheng, Hong Su, Xiuqing Zhou, Jibin Zhang, Fuqiang Li, Hancheng Zheng, Zhikun Zhao, Changjun Yin, Zengquan He, Xin Gao, Haiyen E Zhau, Chia-Yi Chu, Jason Boyang Wu, Colin Collins, Stanislav V Volik, Robert Bell, Jiaoti Huang, Kui Wu, Danfeng Xu, Dingwei Ye, Yongwei Yu, Lianhui Zhu, Meng Qiao, Hang-Mao Lee, Yuehong Yang, Yasheng Zhu, Xiaolei Shi, Rui Chen, Yang Wang, Weidong Xu, Yanqiong Cheng, Chuanliang Xu, Xu Gao, Tie Zhou, Bo Yang, Jianguo Hou, Li Liu, Zhensheng Zhang, Yao Zhu, Chao Qin, Pengfei Shao, Jun Pang, Leland W K Chung, Jianfeng Xu, Chin-Lee Wu, Weide Zhong, Xun Xu, Yingrui Li, Xiuqing Zhang, Jian Wang, Huanming Yang, Jun Wang, Haojie Huang, Yinghao Sun
BACKGROUND: Global disparities in prostate cancer (PCa) incidence highlight the urgent need to identify genomic abnormalities in prostate tumors in different ethnic populations including Asian men. OBJECTIVE: To systematically explore the genomic complexity and define disease-driven genetic alterations in PCa. DESIGN, SETTING, AND PARTICIPANTS: The study sequenced whole-genome and transcriptome of tumor-benign paired tissues from 65 treatment-naive Chinese PCa patients...
September 15, 2017: European Urology
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