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https://www.readbyqxmd.com/read/28197932/effect-of-gnrha-ovulation-trigger-dose-on-follicular-fluid-characteristics-and-granulosa-cell-gene-expression-profiles
#1
Thi Ngoc Lan Vuong, M T Ho, T Q Ha, M Brehm Jensen, C Yding Andersen, P Humaidan
PURPOSE: A recent dose-finding study showed no significant differences in number of mature oocytes, embryos and top-quality embryos when triptorelin doses of 0.2, 0.3 or 0.4 mg were used to trigger final oocyte maturation in oocyte donors co-treated with a gonadotropin-releasing hormone (GnRH) antagonist. This analysis investigated whether triptorelin dosing for triggering final oocyte maturation in oocyte donors induced differences in follicular fluid (FF) hormone levels and granulosa cell gene expression...
February 14, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28195504/postponement-of-puberty-in-queens-treated-with-deslorelin
#2
Marta Cecchetto, Paola Salata, Anna Baldan, Chiara Milani, Antonio Mollo, Christelle Fontaine, Hasan Sontas, Donatella Gelli, Giulia De Benedictis, Calogero Stelletta, Stefano Romagnoli
Objectives The purpose of this study was to assess efficacy of deslorelin, a gonadotropin-releasing hormone (GnRH) agonist marketed in Europe for the control of male dog reproduction, for the postponement of puberty in queens. Methods Nine prepubertal queens aged 3-9 months were selected for this study; their general and reproductive health was checked through clinical, haematological, vaginal cytology and hormonal tests. Following treatment with a 4.7 mg deslorelin implant each cat received a monthly clinical examination and blood was collected for hormonal assay every third month...
February 1, 2017: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/28187961/a-retrospective-analysis-of-ovarian-stimulation-with-letrozole-in-women-undergoing-artificial-insemination-by-donor
#3
X J Sun, L Jiang, L C Ji, R Nie, H Chen, L Jin, G J Zhu, K Qian
The aim of this retrospective study was to determine the clinical pregnancy rate in women undergoing letrozole ovarian stimulation and artificial insemination by donor (AID). Between 2012 and 2015, 130 natural cycles, 939 letrozole cycles and 130 letrozole plus gonadotrophin cycles were conducted. Letrozole cycles were divided into three groups according to LH concentration on the day of HCG administration (LH <10 mIU/ml and follicle size ≥18 cm; LH ≤10 to <20 mIU/ml; and LH ≥20 mIU/ml). Pregnancy rates were 17...
January 25, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28187384/study-on-the-removal-of-organic-micropollutants-from-aqueous-and-ethanol-solutions-by-hap-membranes-with-tunable-hydrophilicity-and-hydrophobicity
#4
Junyong He, Yulian Li, Xingguo Cai, Kai Chen, Hejing Zheng, Chengming Wang, Kaisheng Zhang, Dongyue Lin, Lingtao Kong, Jinhuai Liu
A biocompatible and uniquely defined hydroxyapatite (HAP) adsorption membrane with a sandwich structure was developed for the removal of organic micropollutants for the first time. Both the adsorption and membrane technique were used for the removal of organic micropollutants. The hydrophilicity and hydrophobicity of the HAP adsorbent and membrane were tunable by controlling the surface structure of HAP. The adsorption of organic micropollutants on the HAP adsorbent was studied in batch experiments. The adsorption process was fit with the Freundlich model, while the adsorption kinetics followed the pseudo-second-order model...
February 3, 2017: Chemosphere
https://www.readbyqxmd.com/read/28176338/effects-of-neonatal-17%C3%AE-ethinyloestradiol-exposure-on-female-paced-mating-behaviour-in-the-rat
#5
Chiaki Komine, Shingo Nakajima, Yasuhiko Kondo, Yasuyuki Horii, Midori Yoshida, Maiko Kawaguchi
Correct perinatal oestrogen levels are critical for sexual differentiation. For example, perinatal exposure to oestrogen causes masculinization and defeminization of the brain in female rats and also induces delayed effects after maturation characterized by early onset of abnormal oestrus cycling. However, the mechanisms underlying the above effects of oestrogen remain to be fully determined. 17α-ethinyloestradiol (EE), a common synthetic oestrogen widely used in oral contraceptives, binds specifically to oestrogen receptors...
February 8, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28167499/occupational-factors-and-markers-of-ovarian-reserve-and-response-among-women-at-a-fertility-centre
#6
Lidia Mínguez-Alarcón, Irene Souter, Paige L Williams, Jennifer B Ford, Russ Hauser, Jorge E Chavarro, Audrey J Gaskins
OBJECTIVES: To explore whether work schedules and physically demanding work were associated with markers of ovarian reserve and response. METHODS: This analysis included women (n=473 and n=313 for ovarian reserve and ovarian response analysis, respectively) enrolled in a prospective cohort study of couples presenting to an academic fertility centre (2004-2015). Information on occupational factors was collected on a take-home questionnaire, and reproductive outcomes were abstracted from electronic medical records...
February 6, 2017: Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28166959/the-effect-of-orexin-a-on-cyp17a1-and-cyp19a3-expression-and-on-oestradiol-oestrone-and-testosterone-secretion-in-the-porcine-uterus-during-early-pregnancy-and-the-oestrous-cycle
#7
Marta Kiezun, Nina Smolinska, Kamil Dobrzyn, Karol Szeszko, Edyta Rytelewska, Tadeusz Kaminski
Orexin A (OXA) is a hypothalamic neuropeptide known for its role in the regulation of food intake and arousal. It is also considered as a link between energy homeostasis and reproduction. Nevertheless, very little is known on the role of this peptide in the uterus. The objective of this study was to investigate OXA effect on oestradiol (E2), oestrone (E1), and testosterone (T) secretion by porcine endometrial and myometrial explants and gene expression of key steroidogenic enzymes involved in steroid production, namely cytochrome P450c17 (CYP17A1) and cytochrome P450 aromatase (CYP19A3), on days 10-11, 12 to 13, 15 to 16 and 27 to 28 of pregnancy and on days 10-11 of the cycle...
March 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28155616/crosstalk-between-oxidative-and-nitrosative-stress-and-arterial-stiffness
#8
Ioana Mozos, Constantin Tudor Luca
Arterial stiffness, the expression of reduced arterial elasticity, is an effective predictor of cardiovascular disorders. Oxidative stress is an imbalance between exposure to toxic reactive oxygen species (ROS) and antioxidant systems. The increase in reactive nitrogen species (RNS) is termed nitrosative stress. We review the main mechanisms and products linking arterial stiffness with oxidative and nitrosative stress in several disorders, focusing on recent experimental and clinical data, and the mechanisms explaining benefits of antioxidant therapy...
February 1, 2017: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/28143632/extracellular-like-matrices-and-leukaemia-inhibitory-factor-for-in-vitro-culture-of-human-primordial-follicles
#9
Assiel J Younis, Galit Lerer-Serfaty, Dana Stav, Bethsabee Sabbah, Tzippy Shochat, Gania Kessler-Icekson, Muayad A Zahalka, Michal Shachar-Goldenberg, Avi Ben-Haroush, Benjamin Fisch, Ronit Abir
The possibility of maturing human primordial follicles in vitro would assist fertility restoration without the danger of reseeding malignancies. Leukaemia inhibitory factor (LIF) and certain culture matrices may promote human follicular growth. The present study compared human primordial follicular growth on novel culture matrices, namely human recombinant vitronectin (hrVit), small intestine submucosa (SIS), alginate scaffolds and human recombinant virgin collagen bioengineered in tobacco plant lines (CollPlant)...
February 1, 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/28093926/oestradiol-treatment-for-mood-stabilisation-in-borderline-personality-disorder
#10
Jasmin Grigg, Caroline Thew, Jayashri Kulkarni
No abstract text is available yet for this article.
January 1, 2017: Australian and New Zealand Journal of Psychiatry
https://www.readbyqxmd.com/read/28067781/gestational-zearalenone-exposure-causes-reproductive-and-developmental-toxicity-in-pregnant-rats-and-female-offspring
#11
Xin Gao, Lvhui Sun, Niya Zhang, Chong Li, Jiacai Zhang, Zhuohui Xiao, Desheng Qi
Zearalenone (ZEN) is an oestrogenic mycotoxin commonly found in food and feed products and can affect reproduction and development in both humans and animals. This study aimed to determine the toxic effects of ZEN on maternal SD rats and the F1 female offspring. Sixty-four pregnant rats were divided into 4 groups and exposed to feed contaminated with ZEN (0, 5, 10, and 20 mg/kg feed) on gestational days (GDs) 0-21. Compared with the controls, the groups exposed to 10 and 20 mg/kg ZEN showed significantly decreased feed intake and body weight of pregnant rats and/or female offspring...
January 5, 2017: Toxins
https://www.readbyqxmd.com/read/28039834/disruption-of-sex-hormone-levels-and-steroidogenic-related-gene-expression-on-mongolia-racerunner-eremias-argus-after-exposure-to-triadimefon-and-its-enantiomers
#12
Jitong Li, Jing Chang, Wei Li, Baoyuan Guo, Jianzhong Li, Huili Wang
Triadimefon (TF) is a widely used chiral fungicide with one chiral centre and two enantiomers (TF1 and TF2). However, little is reported about the ecological toxicity of reptiles on an enantioselective level. TF is a potential endocrine disruptor that may interfere with sex steroid hormones, such as testosterone (T) and 17beta-estradiol (E2). In our study, the lizards Mongolia Racerunner (Eremias argus) were orally exposed to TF and its enantiomers for 21 days. Plasma sex steroid hormones and steroidogenic-related genes, including 17-beta-hydroxysteroid (hsd17β), cytochrome P450 enzymes (cyp19 and cyp17), and steroid hormone receptors (erα and Ar) were evaluated...
December 22, 2016: Chemosphere
https://www.readbyqxmd.com/read/28018218/protective-effects-of-pleurotus-tuber-regium-on-carbon-tetrachloride-induced-testicular-injury-in-sprague-dawley-rats
#13
Kenneth O Okolo, Iyeopu M Siminialayi, Orish E Orisakwe
The high rate of male infertility and the meager resources to manage same in sub Saharan Africa have necessitated the search for cost effective and available alternatives. Mushrooms have been used traditionally in folk medicine and as nutraceuticals. This study has investigated the effect of the wild mushroom Pleurotus tuber-regium on carbon tetrachloride (CCl4) deleterious effects on the reproductive system of male rats. Thirty six rats were divided into six groups of six animals each. Group I (negative control) received 10 ml/kg olive oil intraperitoneal weekly in addition to feed and water ad libitum...
2016: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28017339/malignant-oestrogen-producing-teratoma-in-a-cat
#14
Y Machida, M Michishita, M Wada, T Hori, E Kawakami, H Yoshimura, K Ohkusu-Tsukada, K Taya, K Takahashi
A 5-year-old female domestic shorthair cat was presented with abdominal distension and serum biochemical evaluation indicated a high concentration of oestradiol (32.81 pg/ml). Exploratory laparotomy revealed a large cystic mass in the right ovary with cystic fluid containing a high level of oestradiol (18.80 pg/ml). The tumour was composed of immature neuroectodermal tissue, mature cartilage, smooth muscle, adipose tissue and aggregated, poorly differentiated mesenchymal cells. It contained cysts of various sizes that were lined by epithelium of different types...
December 22, 2016: Journal of Comparative Pathology
https://www.readbyqxmd.com/read/28008984/melatonin-implantation-improved-the-egg-laying-rate-and-quality-in-hens-past-their-peak-egg-laying-age
#15
Yaxiong Jia, Minghui Yang, Kuanfeng Zhu, Liang Wang, Yukun Song, Jing Wang, Wenxiang Qin, Zhiyuan Xu, Yu Chen, Guoshi Liu
The egg-laying rates of hens approximately 470 days of age exhibited a positive correlation to blood melatonin levels. The hens with an egg-laying rate <30%, 30~90% and ≥90% had blood melatonin levels of 5.8 ± 2.6, 74.0 ± 32.9 and 445.9 ± 115.3 ng/ml, respectively. When 10 mg of melatonin was implanted into the hens at 300, 360, 470 and 550 days of age, the egg-laying rates increased 4.63 ± 0.46%, 8.38 ± 1.45%, 4.93 ± 0.85% and 7.93 ± 0.91%, respectively, compared to that of the controls...
December 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/28000947/a-potential-mechanism-associated-with-lead-induced-testicular-toxicity-in-rats
#16
M A El-Magd, K A Kahilo, N E Nasr, T Kamal, M Shukry, A A Saleh
This study was conducted to investigate the mechanism of lead (Pb)-induced testicular toxicity. We examined the impact of Pb toxicity on 17β-oestradiol (E2), oestrogen receptors (ERs) and aromatase P450 which are key factors in spermatogenesis. Treatment of rats with Pb acetate (PbAc, 50 mg/L in drinking water) significantly reduced sperm count, motility, viability and increased sperm abnormalities along with degenerative changes in seminiferous tubules and Leydig cells. Additionally, administration of PbAc resulted in a significant reduction in serum testosterone, serum and testicular E2 as well as increased level of testicular testosterone...
December 21, 2016: Andrologia
https://www.readbyqxmd.com/read/27997335/intrafollicular-oestradiol-production-expression-of-the-lh-receptor-lhr-gene-and-its-isoforms-and-early-follicular-deviation-in-bos-indicus
#17
S Wohlres-Viana, E K N Arashiro, M A Machado, L S A Camargo, L G B Siqueira, M P Palhao, J H M Viana
The aim of the present study was to characterise the roles of intrafollicular oestradiol production and granulosa cell (GC) expression of the LH receptor (LHR) gene and its isoforms during follicular deviation in Bos indicus. Follicular wave emergence was synchronised in heifers from a Bos taurus dairy (Holstein; n=10) and a B. indicus dairy breed (Gir; n=10). Follicles were aspirated individually at sizes corresponding to the periods of predeviation, deviation and postdeviation. Intrafollicular oestradiol (IF-E2) and progesterone (IF-P4) concentrations were determined in the follicular fluid (FF) by radioimmunoassay, and relative expression of P450 aromatase (CYP19A1) and LHR forms was evaluated in GC using real-time quantitative-polymerase chain reaction...
December 21, 2016: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/27993100/bisphenol-a-influences-oestrogen-and-thyroid-hormone-regulated-thyroid-hormone-receptor-expression-in-rat-cerebellar-cell-culture
#18
Virág Somogyi, Tamás L Horváth, István Tóth, Tibor Bartha, László Vilmos Frenyó, Dávid Sándor Kiss, Gergely Jócsák, Annamária Kerti, Frederick Naftolin, Attila Zsarnovszky
Thyroid hormones (THs) and oestrogens are crucial in the regulation of cerebellar development. TH receptors (TRs) mediate these hormone effects and are regulated by both hormone families. We reported earlier that THs and oestradiol (E2) determine TR levels in cerebellar cell culture. Here we demonstrate the effects of low concentrations (10(-10) M) of the endocrine disruptor (ED) bisphenol A (BPA) on the hormonal (THs, E2) regulation of TRα,β in rat cerebellar cell culture. Primary cerebellar cell cultures, glia-containing and glia-destroyed, were treated with BPA or a combination of BPA and E2 and/or THs...
December 2016: Acta Veterinaria Hungarica
https://www.readbyqxmd.com/read/27981512/reduced-serum-levels-of-oestradiol-and-brain-derived-neurotrophic-factor-in-both-diabetic-women-and-hfd-feeding-female-mice
#19
Yi Zhang, Shan-Wen Zhang, Neeta Khandekar, Shi-Fei Tong, He-Qin Yang, Wan-Ru Wang, Xu-Feng Huang, Zhi-Yuan Song, Shu Lin
The estrogen levels in the pre and post menstrual phases interact with brain-derived neurotrophic factor in a complex manner, which influences the overall state of the body. To study the role of oestradiol and brain-derived neurotrophic factor in modulating obesity related type 2 diabetes and the interactions between two factors, we enrolled 15 diabetic premenopausal women and 15 diabetic postmenopausal women respectively, the same number of healthy pre and postmenopausal women were recruited as two control groups...
December 16, 2016: Endocrine
https://www.readbyqxmd.com/read/27973745/association-between-changes-in-oestradiol-and-follicle-stimulating-hormone-levels-during-the-menopausal-transition-and-risk-of-diabetes
#20
S K Park, S D Harlow, H Zheng, C Karvonen-Gutierrez, R C Thurston, K Ruppert, I Janssen, J F Randolph
AIM: To investigate the association between changes in oestradiol and follicle-stimulating hormone levels during the menopausal transition and incident diabetes. METHODS: We followed 1407 pre-menopausal women, aged 42-52 years at baseline, who experienced natural menopause, from baseline to the 12(th) annual follow-up visit in the Study of Women's Health Across the Nation (SWAN). Diabetes was defined based on fasting glucose level, medication use and self-report of physician diagnosis...
December 14, 2016: Diabetic Medicine: a Journal of the British Diabetic Association
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