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Reproductive endocrinology

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https://www.readbyqxmd.com/read/29156452/an-international-consortium-update-pathophysiology-diagnosis-and-treatment-of-polycystic-ovarian-syndrome-in-adolescence
#1
Lourdes Ibáñez, Sharon E Oberfield, Selma F Witchel, Richard J Auchus, R Jeffrey Chang, Ethel Codner, Preeti Dabadghao, Feyza Darendeliler, Nancy Samir Elbarbary, Alessandra Gambineri, Cecilia Garcia Rudaz, Kathleen M Hoeger, Abel López-Bermejo, Ken Ong, Alexia S Peña, Thomas Reinehr, Nicola Santoro, Manuel Tena-Sempere, Rachel Tao, Bulent O Yildiz, Haya Alkhayyat, Asma Deeb, Dipesalema Joel, Reiko Horikawa, Francis de Zegher, Peter A Lee
This paper represents an international collaboration of paediatric endocrine and other societies (listed in the Appendix) under the International Consortium of Paediatric Endocrinology (ICPE) aiming to improve worldwide care of adolescent girls with polycystic ovary syndrome (PCOS)1. The manuscript examines pathophysiology and guidelines for the diagnosis and management of PCOS during adolescence. The complex pathophysiology of PCOS involves the interaction of genetic and epigenetic changes, primary ovarian abnormalities, neuroendocrine alterations, and endocrine and metabolic modifiers such as anti-Müllerian hormone, hyperinsulinemia, insulin resistance, adiposity, and adiponectin levels...
November 13, 2017: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/29148544/reproductive-endocrinology-exposure-to-pesticide-residues-linked-to-adverse-pregnancy-outcomes
#2
Alan Morris
No abstract text is available yet for this article.
November 17, 2017: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/29134087/do-glucocorticoids-predict-fitness-linking-environmental-conditions-corticosterone-and-reproductive-success-in-the-blue-tit-cyanistes-caeruleus
#3
L J Henderson, N P Evans, B J Heidinger, K A Herborn, K E Arnold
Glucocorticoids, including corticosterone (CORT), have been suggested to provide a physiological link between ecological conditions and fitness. Specifically, CORT, which is elevated in response to harsh conditions, is predicted to be correlated with reduced fitness. Yet, empirical studies show that CORT can be non-significantly, positively and negatively linked with fitness. Divergent environmental conditions between years or study systems may influence whether CORT is linked to fitness. To test this, we monitored free-living blue tits (Cyanistes caeruleus) during breeding over 3 years...
October 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/29100890/molecular-endocrinology-of-female-reproductive-behavior
#4
REVIEW
D W Pfaff, K Gagnidze, R G Hunter
Epigenetic methodologies address mechanisms of estrogenic effects on hypothalamic and preoptic neurons, as well as mechanisms by which stress can interfere with female reproductive behaviors. Recent results are reviewed.
October 31, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/29099281/variability-of-genome-wide-dna-methylation-and-mrna-expression-profiles-in-reproductive-and-endocrine-disease-related-tissues
#5
Nilufer Rahmioglu, Alexander W Drong, Helen Lockstone, Thomas Tapmeier, Karin Hellner, Merli Saare, Triin Laisk-Podar, Christine Dew, Emily Tough, George Nicholson, Maire Peters, Andrew P Morris, Cecilia M Lindgren, Christian M Becker, Krina T Zondervan
Genome-wide association studies in the fields of reproductive medicine and endocrinology are yielding robust genetic variants associated with disease. Integrated genomic, transcriptomic, and epigenomic molecular profiling studies are common methodologies used to understand the biological pathways perturbed by these variants. However, molecular profiling resources do not include the tissue most relevant to many female reproductive traits, the endometrium, while the parameters influencing variability of results from its molecular profiling are unclear...
November 3, 2017: Epigenetics: Official Journal of the DNA Methylation Society
https://www.readbyqxmd.com/read/29083441/measuring-active-and-healthy-ageing-applying-a-generic-interdisciplinary-assessment-model-incorporating-icf
#6
P Stute, N Bitterlich, J Bousquet, F Meissner, M von Wolff, D Poethig
OBJECTIVES: In this study we compared the chronological and bio-functional age between two German speaking cohorts 30 years apart applying a comprehensive and generic Active and Healthy Aging (AHA) assessment model incorporating ICF. METHODS: Single-centre, cross-sectional, observational, non-interventional, non-randomized trial at an University based women's hospital, division of Gynecological Endocrinology and Reproductive Medicine. All participants followed a standardized, holistic battery of biopsychosocial assessments consisting of bio-functional status (BFS), bio-functional age (BFA) and additional validated psychometric questionnaires...
2017: Journal of Nutrition, Health & Aging
https://www.readbyqxmd.com/read/29082367/association-of-snp-rs-2414096-cyp19-gene-with-polycystic-ovarian-syndrome-in-iranian-women
#7
Anahita Mehdizadeh, Seyed Mehdi Kalantar, Mohammad Hassan Sheikhha, Bibi Shahnaz Aali, Azam Ghanei
BACKGROUND: Genetic factors are believed to play an important role in the etiology of polycystic ovarian syndrome (PCOS) which is the most common endocrinological disorder of women in their reproductive age. Androgen metabolism is impaired in PCOS and, thus, CYP19 gene which is involved in this pathway can be a candidate gene. Previous studies have shown a relationship between single nucleotide polymorphism (SNP) of CYP19 in hyperandrogenism and PCOS in some racial groups. OBJECTIVE: This study was designed to elucidate the role of CYP19 gene in PCOS in Iran...
August 2017: International Journal of Reproductive Biomedicine (Yazd, Iran)
https://www.readbyqxmd.com/read/29059580/characteristics-of-peripheral-blood-nk-and-nkt-like-cells-in-euthyroid-and-subclinical-hypothyroid-women-with-thyroid-autoimmunity-experiencing-reproductive-failure
#8
Eva Miko, Matyas Meggyes, Katalin Doba, Nelli Farkas, Barbara Bogar, Aliz Barakonyi, Laszlo Szereday, Julia Szekeres-Bartho, Emese Mezosi
Thyroid autoimmunity (TAI) appears to play a crucial role in female infertility, recurrent pregnancy loss and IVF failure. Thyroid autoantibodies against thyroid peroxidase and thyroglobulin have been shown to represent an independent risk factor for infertility and miscarriage. Moreover, thyroxin hormone administration reduces the risk of obstetrical complications in TAI positive women. The aim of our present study was to investigate the immunological background of female infertility and recurrent pregnancy loss in euthyroid and subclinical hypothyroid women with TAI focusing on innate immunity...
September 28, 2017: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/29055783/prenatal-organochlorine-pesticide-exposure-and-the-disruption-of-steroids-and-reproductive-hormones-in-cord-blood-the-hokkaido-study
#9
Atsuko Araki, Chihiro Miyashita, Takahiko Mitsui, Houman Goudarzi, Futoshi Mizutani, Youichi Chisaki, Sachiko Itoh, Seiko Sasaki, Kazutoshi Cho, Kimihiko Moriya, Nobuo Shinohara, Katsuya Nonomura, Reiko Kishi
Certain organochlorine pesticides (OCPs) are designated as persistent organic pollutants and are regulated in many countries. The effects of OCPs on pediatric endocrinology are a concern; however, only limited data exist from human studies on maternal OCP exposure and its effects on infants' hormone levels. This study was conducted as part of the Hokkaido Study Sapporo Cohort, a prospective birth cohort study in Japan. Participants included 514 women who enrolled at 23-35weeks of gestation between 2002 and 2005; maternal blood samples were collected in late pregnancy, and 29 OCPs were measured...
January 2018: Environment International
https://www.readbyqxmd.com/read/29051074/pairing-ultrasonography-with-endocrinology-to-elucidate-underlying-mechanisms-of-successful-pregnancy-in-the-northern-fur-seal-callorhinus-ursinus
#10
Michelle R Shero, Don R Bergfelt, J Ward Testa, Gregg P Adams
Reproductive success is one of the central tenets of conservation management programs, yet the inability to study underlying physiological processes in a minimally-invasive manner and the unpredictable nature of wild animal populations leaves large gaps in our knowledge of factors critical to successful reproduction in wild species. This study integrated ultrasonography of the reproductive tract and analysis of reproductive hormones in 172 northern fur seals (Callorhinus ursinus) to identify intrinsic factors associated with reinitiating embryonic growth at the end of diapause...
January 1, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29039178/-potential-clinical-application-of-kisspeptin-in-reproductive-endocrinology
#11
Yanling Fu, Yimin Zhu
Gonadotropin-releasing hormone (GnRH) plays an important role in the process of reproduction. Studies have shown that a family of peptides Kisspeptin can act on GnRH-related neurons, stimulating the secretion of GnRH, and activating the hypothalamic-pituitary-gonadal axis. Both animal experiments and clinical studies have shown that exogenous administration of Kisspeptin is able to induce physiological GnRH release in healthy individuals and those with endocrine-disorders, which brings great hope for treatment of reproductive endocrine diseases...
May 25, 2017: Zhejiang da Xue Xue Bao. Yi Xue Ban, Journal of Zhejiang University. Medical Sciences
https://www.readbyqxmd.com/read/29026049/diabetes-in-older-people-position-statement-of-the-hong-kong-geriatrics-society-and-the-hong-kong-society-of-endocrinology-metabolism-and-reproduction
#12
C W Wong, J Sw Lee, K F Tam, H F Hung, W Y So, C K Shum, C Y Lam, J N Cheng, S P Man, T W Auyeung
Following a survey on the clinical practice of geriatricians in the management of older people with diabetes and a study of hypoglycaemia in diabetic patients, a round-table discussion with geriatricians and endocrinologists was held in January 2015. Consensus was reached for six domains specifically related to older diabetic people: (1) the considerations when setting an individualised diabetic management; (2) inclusion of geriatric syndrome screening in assessment; (3) glycaemic and blood pressure targets; (4) pharmacotherapy; (5) restrictive diabetic diet; and (6) management goals for nursing home residents...
October 2017: Hong Kong Medical Journal, Xianggang Yi Xue za Zhi
https://www.readbyqxmd.com/read/28985546/ovulation-induction-and-controlled-ovarian-stimulation-using-letrozole-gonadotropin-combination-a-single-center-retrospective-cohort-study
#13
Sushila Arya, Sanja Kupesic-Plavsic, Zuber D Mulla, Alok K Dwivedi, Zeni Crisp, Jisha Jose, Luis S Noble
OBJECTIVE: To assess the effect of letrozole in combination with low dose gonadotropins for ovulation induction in anovulatory infertility from polycystic ovary syndrome (PCOS) and controlled ovarian stimulation for endometriosis, and unexplained infertility patients. STUDY DESIGN: Retrospective cohort study in a setting of private Reproductive Endocrinology and Infertility Clinic affiliated with the University. Three hundred couples (650 cycles) requiring OI/COS for PCOS (92 patients, 195 cycles), endometriosis (89 patients, 217 cycles), and unexplained infertility (119 patients, 238 cycles)...
November 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28980338/clinical-case-seminar-post-menopausal-ovarian-androgen-excess-challenges-in-diagnostic-work-up-and-management-of-ovarian-thecosis
#14
Yaasir Mamoojee, Murali Ganguri, Norman Taylor, Richard Quinton
A 72 year old female was referred to the Department of Endocrinology with a 20-year history of hirsutes, mostly affecting her face and torso, the initial onset of which dated shortly after menopause age 52 years. There was no history of subfertility, menstrual irregularity, or hyperandrogenism during reproductive life to suggest prior polycystic ovary syndrome (PCOS), with three live births, two miscarriages and one still-birth. This article is protected by copyright. All rights reserved.
October 4, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28971380/abstracts-for-2017-foundation-for-reproductive-medicine-translational-reproductive-biology-and-clinical-reproductive-endocrinology-conference
#15
(no author information available yet)
No abstract text is available yet for this article.
October 3, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28951977/polycystic-ovary-syndrome-throughout-a-woman-s-life
#16
REVIEW
José Bellver, Luis Rodríguez-Tabernero, Ana Robles, Elkin Muñoz, Francisca Martínez, José Landeras, Juan García-Velasco, Juan Fontes, Mónica Álvarez, Claudio Álvarez, Belén Acevedo
Polycystic ovary syndrome (PCOS) is the most common endocrine disorder among reproductive-aged women and the main cause of infertility due to anovulation. However, this syndrome spans the lives of women affecting them from in-utero life until death, leading to several health risks that can impair quality of life and increase morbidity and mortality rates. Fetal programming may represent the beginning of the condition characterized by hyperandrogenism and insulin resistance which leads to a series of medical consequences in adolescence, adulthood, and old age...
September 27, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28950844/effect-of-simvastatin-on-monocyte-chemoattractant-protein-1-expression-in-endometriosis-patients-a-randomized-controlled-trial
#17
Wanwisa Waiyaput, Somphoch Pumipichet, Sawaek Weerakiet, Sasivimol Rattanasiri, Areepan Sophonsritsuk
BACKGROUND: Simvastatin is a promising new drug for the treatment of endometriosis. It is a cholesterol-lowering drug that acts by inhibiting HMG-CoA reductase, resulting in a decrease in mevalonate, a precursor of cholesterol and monocyte chemoattractant protein-1 (MCP-1). This study investigated the effect of pre-operative oral simvastatin administration on MCP-1 gene expression and serum MCP-1 protein levels in patients with endometriosis. METHODS: A prospective, randomized, controlled study was conducted at the Reproductive Endocrinology Unit of the Department of Obstetrics and Gynecology at the Faculty of Medicine Ramathibodi Hospital...
September 26, 2017: BMC Women's Health
https://www.readbyqxmd.com/read/28901587/serum-estradiol-and-progesterone-profiles-during-estrus-pseudopregnancy-and-active-gestation-in-steller-sea-lions
#18
Renae Sattler, Lori Polasek
While the proximate driver behind the decline of the Western stock of Steller sea lions (Eumetopias jubatus, >80% since 1970s) is likely multifactorial, the population reduction may have been powered by a decrease in fecundity. A harvest of Steller sea lions in the 1970s and 80s revealed a 30% reduction in the proportion of pregnant females from early (October-November) to late gestation (April-May). Identification and quantification of these reproductive failures are difficult when we lack species-specific data on endocrinology associated with discrete stages of the reproductive cycle (i...
September 2017: Zoo Biology
https://www.readbyqxmd.com/read/28854581/unexplained-recurrent-miscarriages-are-associated-with-an-aberrant-sperm-protamine-mrna-content
#19
Nina Rogenhofer, Johannes Ott, Adrian Pilatz, Julia Wolf, Christian J Thaler, Lisa Windischbauer, Undraga Schagdarsurengin, Klaus Steger, Viktoria von Schönfeldt
STUDY QUESTION: Are unexplained recurrent miscarriages associated with abnormal protamine-1 and protamine-2 mRNA levels in spermatozoa? SUMMARY ANSWER: Both protamine-1 and protamine-2 mRNA levels as well as the protamine-1 to protamine-2 mRNA ratio in spermatozoa from men whose female partners experienced two or more consecutive miscarriages were significantly different compared to those from both healthy control men and subfertile couples undergoing IVF/ICSI. WHAT IS KNOWN ALREADY: Aberrant sperm protamine ratios are known to be associated with male-factor infertility...
August 1, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28852505/non-invasive-endocrine-monitoring-indicates-seasonal-variations-in-gonadal-hormone-metabolites-in-dholes-cuon-alpinus
#20
Jaruwan Khonmee, Suvichai Rojanasthien, Chatchote Thitaram, Jureerat Sumretprasong, Anurut Aunsusin, Chawin Chaisongkram, Nucharin Songsasen
To date, there is no information on reproductive endocrinology of dholes (Cuon alpinus). The objectives of the present study were as follows: (i) to characterize longitudinal profiles of gonadal steroids; and (ii) to examine the relationship between gonadal hormones and sexual behaviours in dholes. Three breeding pairs and two bachelor males were included in the study. Among these, four animals (2 males and 2 females; 4 years old) were imported from The Netherlands to Thailand 3 months before the study onset; the remaining individuals (3 males and 1 female; 5-7 years old) were native born...
2017: Conservation Physiology
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