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Ali Abbara, Shakunthala Narayanaswamy, Chioma Izzi-Engbeaya, Alexander N Comninos, Sophie Clarke, Zainab Malik, Deborah Papadopoulou, Ailish Clobentz, Zubair Sarang, Paul Bassett, Channa Jayasena, Waljit S Dhillo
<br>Background: Male testosterone levels decline by 1% per year from the age of 40yrs. Whilst a primary testicular deficit occurs, hypothalamic or pituitary dysregulation may also coexist. This study aimed to compare the hypothalamic response to kisspeptin and the pituitary response to GnRH of older men with those of young men. METHODS: Following 1 hour of baseline sampling, healthy older men (n=5, mean age 59.3±2.9yrs) received a 3 hour intravenous infusion (IVI) of either: vehicle, kisspeptin-54 0...
March 15, 2018: Neuroendocrinology
Alzbeta Bujnakova Mlynarcikova, Sona Scsukova
In the present study, we aimed to examine effects of different concentrations of the endocrine disruptor Bisphenol A (BPA; 1 nM, 1 μM, 100 μM) and the flavonoid fisetin (1, 10, 25, 50 μM), individually and in combinations, on steroidogenic function of porcine ovarian granulosa cells (GCs) represented by progesterone production. We confirmed that BPA inhibited progesterone production by GCs at the highest concentration. Fisetin reduced gonadotropin-stimulated progesterone synthesis dose-dependently, and in this manner, fisetin impaired progesterone production when added to BPA-treated GCs...
March 2, 2018: Environmental Toxicology and Pharmacology
Laurence Dufourny, Oona Delmas, Ana-Paula Teixeira-Gomes, Caroline Decourt, Joanna H Sliwowska
Somatostatin (SST) a neuropeptide involved in the central modulation of several physiological functions, is co-distributed in the same hypothalamic areas as kisspeptin (KP), the most potent secretagogue of the gonadotropin-releasing hormone (GnRH) secretion known to date. As SST infused intracerebroventricularly (icv) evoked a potent inhibition of GnRH release, we explored neuroanatomical relationships between KP and SST populations in male and female rats. For that, intact males and ovariectomised oestradiol-replaced females were killed and their brains processed in order to simultaneously detect KP, SST and synapsin, a marker for synapses...
March 15, 2018: Journal of Neuroendocrinology
Nayla J Bushaqer, Nawal M Dayoub, Khalsa K AlHattali, Hisham A Ayyoub, Samaher S AlFaraj, Samar N Hassan
OBJECTIVE: To compare follicular reduction prior to human chorionic gonadotropin (HCG) trigger and coasting in terms of ovarian hyper-stimulation syndrome (OHSS) reduction, pregnancy, and cancellation rates in in vitro fertilization/ intracytoplasmic sperm injection (IVF/ICSI) cycles. METHODS:  This study was designed as a prospective study. The setting was the IVF unit at King Abdulaziz Medical City, Riyadh, Kingdom of Saudi Arabia. A total of 39 patients undergoing IVF/ICSI cycles, who were at risk of OHSS, 20 were put into a coasting group and 19 had follicular reduction instead...
March 2018: Saudi Medical Journal
Yudi Geng, Qiaohong Lai, Yang Xun, Lei Jin
OBJECTIVE: To explore factors causing a premature rise in luteinizing hormone among high ovarian responders undergoing the gonadotropin-releasing hormone (GnRH) antagonist ovarian stimulation protocol. METHODS: The present retrospective study included healthy women undergoing fresh cycles using a fixed GnRH antagonist protocol with a predicted high response and antral follicle count (AFC) of at least 15 at the Reproductive Medicine Center of Tongji Hospital, China, between January 1 and December 31, 2016...
March 15, 2018: International Journal of Gynaecology and Obstetrics
Ji Yong Choi, Cheol Young Choi
This study was conducted to identify the possible effect of recombinant vertebrate ancient long (VAL) opsin as a non-visual "photoreceptor" in the deep brain of goldfish, Carassius auratus. In addition, we investigated the effects of green-wavelength light on the predictable reproductive function of VAL-opsin as a green-sensitive pigment in the deep brain. To determine this, we quantified changes in gonadotropin hormone (GTH) [GTHα, follicle stimulating hormone (FSH) and luteinizing hormone (LH)] and estrogen receptor (ER; ERα and ERβ) mRNA expression levels associated with goldfish reproduction as well as changes in plasma FSH, LH, and 17β-estradiol (E2 ) activities after injection of recombinant VAL-opsin protein in two concentrations (0...
March 14, 2018: Fish Physiology and Biochemistry
(no author information available yet)
No abstract text is available yet for this article.
March 9, 2018: Journal of Clinical Endocrinology and Metabolism
M Cunha-Silva, V N Brito, D B Macedo, D S Bessa, C O Ramos, L G Lima, P S Barroso, I J P Arnhold, D L Segaloff, B B Mendonca, A C Latronico
Testotoxicosis is a rare cause of peripheral precocious puberty in boys caused by constitutively activating mutations of the LHCG receptor. Affected males usually have normal gonadotropin profiles and fertility in their adult life. Here, we described the long-term follow-up of a 24-year-old young man with severe testotoxicosis due to a de novo activating mutation in the third transmembrane helix of the LHCGR (p.Leu457Arg). This patient was treated with different medications, including medroxyprogesterone acetate, ketoconazole, cyproterone acetate and aromatase inhibitor from age 2...
March 12, 2018: Human Reproduction
Z Merhi, E Buyuk, M J Cipolla
STUDY QUESTION: Does vitamin D attenuate the adverse effects of advanced glycation end products (AGEs) on steroidogenesis by human granulosa cells (GCs)? SUMMARY ANSWER: AGEs alter the expression of genes important in steroidogenesis while 1,25-dihydroxyvitamin D3 (vit D3) in vitro attenuates some of the actions of AGEs on steroidogenic gene expression, possibly by downregulating the expression of the pro-inflammatory cell membrane receptor for AGEs (RAGE). WHAT IS KNOWN ALREADY: Vitamin D attenuates the pro-inflammatory effects of AGEs in non-ovarian tissues...
March 12, 2018: Molecular Human Reproduction
Lucia Negri, Napoleone Ferrara
The mammalian prokineticins family comprises two conserved proteins, EG-VEGF/PROK1 and Bv8/PROK2, and their two highly related G protein-coupled receptors, PKR1 and PKR2. This signaling system has been linked to several important biological functions, including gastrointestinal tract motility, regulation of circadian rhythms, neurogenesis, angiogenesis and cancer progression, hematopoiesis, and nociception. Mutations in PKR2 or Bv8/PROK2 have been associated with Kallmann syndrome, a developmental disorder characterized by defective olfactory bulb neurogenesis, impaired development of gonadotropin-releasing hormone neurons, and infertility...
April 1, 2018: Physiological Reviews
Philippa Melamed, Majd Haj, Yahav Yosefzon, Sergei Rudnizky, Andrea Wijeweera, Lilach Pnueli, Ariel Kaplan
Gonadotropin-releasing hormone (GnRH) stimulates the expression of multiple genes in the pituitary gonadotropes, most notably to induce synthesis of the gonadotropins, luteinizing hormone (LH), and follicle-stimulating hormone (FSH), but also to ensure the appropriate functioning of these cells at the center of the mammalian reproductive endocrine axis. Aside from the activation of gene-specific transcription factors, GnRH stimulates through its membrane-bound receptor, alterations in the chromatin that facilitate transcription of its target genes...
2018: Frontiers in Endocrinology
Riittakerttu Kaltiala-Heino, Hannah Bergman, Marja Työläjärvi, Louise Frisén
Increasing numbers of adolescents are seeking treatment at gender identity services in Western countries. An increasingly accepted treatment model that includes puberty suppression with gonadotropin-releasing hormone analogs starting during the early stages of puberty, cross-sex hormonal treatment starting at ~16 years of age and possibly surgical treatments in legal adulthood, is often indicated for adolescents with childhood gender dysphoria (GD) that intensifies during puberty. However, virtually nothing is known regarding adolescent-onset GD, its progression and factors that influence the completion of the developmental tasks of adolescence among young people with GD and/or transgender identity...
2018: Adolescent Health, Medicine and Therapeutics
Xiaowei Wen, Jun Xie, Lixia Zhou, Yong Fan, Baofeng Yu, Qiuju Chen, Yonglun Fu, Zheng Yan, Haiyan Guo, Qifeng Lyu, Yanping Kuang, Weiran Chai
Medroxyprogesterone 17-acetate (MPA) combined with human menopausal gonadotropin (hMG) has been effectively used for ovarian stimulation in clinical practice. However, the molecular mechanism of MPA + hMG treatment in follicular development is poorly described. Here we performed a study to investigate the impact of MPA + hMG on ovarian stimulation utilizing a mouse model in vivo. Forty female BALB/C mice were randomly divided into four groups of 10 each and treated during ciestrus stage and continued for 5 days: control group, MPA group, hMG group, and MPA + hMG group...
March 13, 2018: Scientific Reports
Xiao Wang, Huarong Wang, Wei Liu, Zhiyuan Zhang, Yanhao Zhang, Wenqiang Zhang, Zijiang Chen, Guoliang Xia, Chao Wang
Polycystic ovary syndrome (PCOS), which is characterized by hyperandrogenism, is a complex endocrinopathy that affects the fertility of 9%-18% of reproductive-age women. However, the exact mechanism of PCOS, especially hyperandrogen-induced anovulation, is largely unknown to date. Physiologically, the natriuretic peptide type C/natriuretic peptide receptor 2 (CNP/NPR2) system is essential for sustaining oocyte meiotic arrest until the preovulatory luteinizing hormone (LH) surge. We therefore hypothesized that the CNP/NPR2 system is also involved in PCOS and contributes to arresting oocyte meiosis and ovulation...
March 13, 2018: Clinical Science (1979-)
Elizabeth G Raymond, Tara Shochet, Hillary Bracken
OBJECTIVES: To summarize data on the accuracy and acceptability of a strategy for identifying ongoing pregnancy after medical abortion treatment using a low-sensitivity pregnancy test (LSPT). STUDY DESIGN: We searched PubMed to identify studies that evaluated the use of a single post-treatment LSPT for detection of ongoing pregnancy after treatment with mifepristone and misoprostol. We extracted, assessed, and summarized data from each study. RESULTS: We found 10 studies that evaluated 6 LSPTs with human chorionic gonadotropin detection thresholds of 1000, 1500, or 2000 mIU/ml...
March 10, 2018: Contraception
Min Hyun Baek, Jeong Yeol Park, Yangsoon Park, Kyu Rae Kim, Dae Yeon Kim, Dae Shik Suh, Jong Hyeok Kim, Yong Man Kim, Young Tak Kim, Joo Hyun Nam
OBJECTIVE: To investigate the expression of androgen receptor (AR) and its correlation with disease status and survival outcome in uterine leiomyosarcoma with other hormone receptors. METHODS: The medical records and paraffin blocks of 42 patients were reviewed. The immunohistochemical expression of AR, estrogen receptor (ER), progesterone receptor (PR), gonadotropin releasing hormone (GnRH), and cytochrome P450, family 19, subfamily A, polypeptide 1 (CYP19A1) were assessed using tissue microarray...
February 5, 2018: Journal of Gynecologic Oncology
Elena Maryamchik, Kirill A Lyapichev, Bradford Halliday, Andrew E Rosenberg
We report a first case of paraneoplastic human chorionic gonadotropin (HCG) production in a dedifferentiated liposarcoma with rhabdosarcomatous differentiation in an 83-year-old man with a retroperitoneal mass, unilateral scrotal enlargement, and a serum HCG level of 843 IU/L. Core biopsy of the retroperitoneal mass revealed rhabdomyosarcoma. Orchiectomy revealed a paratesticular dedifferentiated liposarcoma with rhabdosarcomatous differentiation. Fluorescence in situ hybridization analysis performed on both the retroperitoneal and paratesticular masses revealed amplification of MDM2...
March 1, 2018: International Journal of Surgical Pathology
Jessica R Zolton, Toral P Parikh, Dennis D Hickstein, Steven M Holland, Micah J Hill, Alan H DeCherney, Erin F Wolff
PURPOSE: To describe controlled ovarian stimulation (COS) in a population of women with GATA2 deficiency, a genetic bone marrow failure syndrome, prior to allogeneic hematopoietic stem cell transplant METHODS: This is a retrospective case series of nine women with GATA2 deficiency who underwent oocyte preservation at a research institution. Main outcomes measured include baseline fertility characteristics ((antimullerian hormone (AMH) and day 3 follicle-stimulating hormone (FSH) and estradiol (E2)) and total doses of FSH and human menopausal gonadotropins (HMG), E2 on day of trigger, and total number of metaphase II oocytes retrieved...
March 13, 2018: Journal of Assisted Reproduction and Genetics
Sanjay Chauhan, Sayeed Unisa, Beena Joshi, Ragini Kulkarni, Amarjeet Singh, Thilakavathi Subramanian, Ramendra Narayan Chaudhuri, A C Baishya, Shalini Bharat, Anushree Patil, Achhelal Pasi, Dinesh Agarwal
Background: Infertility is a neglected service component in the public health-care system in India. Objectives: This study aims to assess the availability and practices on prevention and management services for infertility in the district health system. Methodology: A cross-sectional survey of selected health facilities and the staff from 12 district hospitals (DHs), 24 community health centers (CHCs), 48 primary health centers (PHCs), and 48 subcenters was conducted using qualitative and quantitative methods...
January 2018: Indian Journal of Community Medicine
Sadikah Behbehani, Stefano Polesello, Joseph Hasson, Justin Silver, Weon-Young Son, Michael Dahan
OBJECTIVE: Asses clinical pregnancy rates and live birth rates in the presence of non-cavity deforming intramural fibroids in single fresh blastocyst transfer cycles DESIGN CLASSIFICATION: Canadian Task Force classification II-2 SETTING SETTING: Academic fertility center. PATIENT(S): 929 fresh single blastocyst transfer cycles were included; 94 with only non cavity distorting intramural fibroids and 764 without fibroids. Cleavage embryo transfers were excluded to reduce bias based on embryo quality INTERVENTION(S): none MAIN OUTCOME MEASURE(S): Live birth rate (LBR) and clinical pregnancy rate (CPR) RESULT(S): There were no differences noted in gravity, parity, or body mass index in patients with and without fibroids...
March 9, 2018: Journal of Minimally Invasive Gynecology
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