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https://www.readbyqxmd.com/read/28433506/heifers-express-g-protein-coupled-receptor-61-in-anterior-pituitary-gonadotrophs-in-stage-dependent-manner
#1
Kiran Pandey, Onalenna Kereilwe, Vitaliano Borromeo, Hiroya Kadokawa
Gonadotropin-releasing hormone receptors (GnRHRs) colocalize with insulin and glucocorticoid receptors in lipid rafts of the gonadotroph plasma membrane, where they facilitate downstream signaling. We recently found that orphan G-protein-coupled receptor (GPR)61 is expressed in the anterior pituitary (AP) of heifers, leading us to speculate that GPR61 colocalizes with GnRHR in the plasma membrane of gonadotroph and is expressed at specific times of the reproductive cycle. To test this hypothesis, we examined the coexpression of GnRHR, GPR61, and either luteinizing hormone (LH) β subunit or follicle-stimulating hormone (FSH) β subunit in AP tissue and cultured AP cells by immunofluorescence microscopy...
April 4, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28431984/thyroid-disrupting-pesticides-impair-the-hypothalamic-pituitary-testicular-axis-of-a-wildlife-bird-amandava-amandava
#2
Banalata Mohanty, Surya Prakash Pandey, Kazuyoshi Tsutsui
The effect of two thyroid disrupting pesticides (TDPs) mancozeb (MCZ) and imidacloprid (IMI) on the hypothalamic-pituitary-gonadal/testicular (HPG) axis of a seasonally breeding bird, Amandava amandava has been evaluated. Male birds (n=8/group) were exposed to each of the pesticide (0.25% LD50 of respective pesticide) as well as to their two equimixture doses (0.25% of LD50 of each and 0.5% LD50 of each) through food for 30d during pre-breeding stage of the reproductive cycle. Reduction in weight, volume and other histopathological features revealed testicular regression...
April 18, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28429422/retrospective-evaluation-of-premenopausal-hormone-sensitive-breast-cancer-patients-treated-with-adjuvant-gonadotropin-releasing-hormone-analogue-anatolian-society-of-medical-oncology-asmo-study
#3
Ayşe Demirci, Necati Alkış, Faysal Dane, Ayşe Durnalı, Ömer Kamil Yazıcı, Rashad Rzayev, Serap Kaya, Doğan Yazılıtaş, Mevlüde İnanç, Melike Özçelik, Tülay Akman, Mehmet Ali Kaplan, Yusuf Günaydın, Arife Ulaş, Özlem Sönmez, Saadet Tokluoğlu, Gamze Gököz Doğu, Öznur Bal, Mahmut Gümüş
AIM: The goal of this study is to evaluate possible factors affecting the survival of patients treated with gonadotropin-releasing hormone (GnRH) analogues. METHODS: Demographic characteristics, treatment modalities, overall survival (OS) and the possible factors affecting the survival a total of 554 premenopausal breast cancer patients in Turkey evaluated retrospectively. RESULTS: The median duration of GnRH analogues use was 22 ± 13.6 (range, 1-87) months...
April 21, 2017: Asia-Pacific Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28429210/prenatal-hyperhomocysteinemia-impairs-hypothalamic-regulation-of-reproductive-cycles-in-rat-progeny
#4
A V Arutyunyan, I V Zaloznyaya, G O Kerkeshko, Yu P Milyutina, A V Korenevskii
Effects of prenatal hyperhomocysteinemia on hypothalamic regulation of estrous cycles were studied in female rats. In mature rats exposed to prenatal hyperhomocysteinemia, changes in the catecholamine content in hypothalamic areas responsible for the formation of the preovulatory surge of gonadotropin-releasing hormone were revealed: the level of norepinephrine in the medial preoptic area decreased and concentration of dopamine in the median eminence with arcuate nuclei increased. Administration of melatonin attenuated the observed changes, which can be related to neuroprotective effects of this hormone determined by its antioxidant properties...
April 20, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28428962/a-higher-ovarian-response-after-stimulation-for-ivf-is-related-to-a-higher-number-of-euploid-embryos
#5
Elena Labarta, Ernesto Bosch, Amparo Mercader, Pilar Alamá, Emilia Mateu, Antonio Pellicer
This study has analysed the relationship between ovarian response and the number of euploid embryos. This is a post hoc analysis of a subset of data generated during a prospective cohort study previously published. Forty-six oocyte donors were subjected to ovarian stimulation with 150 IU of rFSH and 75 IU of hp-hMG in a GnRH agonist long protocol. Preimplantation genetic screening was performed in all viable embryos. We observed a positive relationship between ovarian response and the number of euploid embryos...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28428942/follicular-fluid-cerebellin-and-betatrophin-regulate-the-metabolic-functions-of-growing-follicles-in-polycystic-ovary-syndrome
#6
Aynur Adeviye Ersahin, Mustafa Acet, Suat Suphan Ersahin, Tuba Acet, Meltem Yardim, Omer Kenanoglu, Suleyman Aydin
OBJECTIVE: The aim of this study was to assess the changes of follicular fluid (FF) and serum levels of cerebellin precursor protein 1 (cbln1) and betatrophin in patients with polycystic ovary syndrome (PCOS) undergoing in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI) with a gonadotropin-releasing hormone (GnRH) antagonist protocol. METHODS: Twenty infertile women with PCOS and 20 control women diagnosed as poor responders undergoing ovarian stimulation with a GnRH antagonist were included...
March 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28427900/molecular-cloning-and-characterization-of-kiss1-in-brandt-s-voles-lasiopodomys-brandtii
#7
Yan Chen, Lan Liu, Zhengguang Li, Dawei Wang, Ning Li, Ying Song, Cong Guo, Xiaohui Liu
Kisspeptin, encoded by kiss1, has been regarded as a major modulator of mammalian puberty and fertility due to its stimulation on GnRH. Brandt's vole is one of the main pest species on the Inner Mongolian steppes for its striking reproductive capacity and kiss1 is a key candidate gene related to reproductive regulatory cascades. In this study, kiss1 cDNA was cloned from the hypothalamus of Brandt's voles and kiss1 mRNA levels were investigated in different tissues, and at different developmental stages, using high-throughput real-time PCR...
April 18, 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/28427285/premenstrual-dysphoric-disorder-symptoms-following-ovarian-suppression-triggered-by-change-in-ovarian-steroid-levels-but-not-continuous-stable-levels
#8
Peter J Schmidt, Pedro E Martinez, Lynnette K Nieman, Deloris E Koziol, Karla D Thompson, Linda Schenkel, Paul G Wakim, David R Rubinow
OBJECTIVE: Premenstrual dysphoric disorder (PMDD) symptoms are eliminated by ovarian suppression and stimulated by administration of ovarian steroids, yet they appear with ovarian steroid levels indistinguishable from those in women without PMDD. Thus, symptoms could be precipitated either by an acute change in ovarian steroid levels or by stable levels above a critical threshold playing a permissive role in expression of an underlying infradian affective "pacemaker." The authors attempted to determine which condition triggers PMDD symptoms...
April 21, 2017: American Journal of Psychiatry
https://www.readbyqxmd.com/read/28425233/comparison-of-the-standard-gnrh-antagonist-protocol-and-the-luteal-phase-estradiol-gnrh-antagonist-priming-protocol-in-poor-ovarian-responders
#9
Mehmet Fırat Mutlu, İlknur Mutlu, Mehmet Erdem, İsmail Güler, Ahmet Erdem
BACKGROUND/AIM: The aim of the study was to compare the luteal estradiol patch/GnRH antagonists priming protocol (LPP) with the standard GnRH antagonist protocol in poor ovarian responders (PORs) in terms of the outcomes of in vitro fertilization (IVF) treatment. MATERIALS AND METHODS: IVF outcomes of 265 cycles in 265 patients (106 in the LPP group, 159 in the standard GnRH antagonist group) were evaluated retrospectively. RESULTS: Mean length of stimulation (11...
April 18, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28424661/gonadotropin-inhibitory-hormone-plays-roles-in-stress-induced-reproductive-dysfunction
#10
REVIEW
Takeshi Iwasa, Toshiya Matsuzaki, Kiyohito Yano, Minoru Irahara
Physical and psychological stressors suppress hypothalamic-pituitary-gonadal axis activity and sexual behavior and consequently induce reproductive dysfunction. Recently, it has been shown that gonadotropin-inhibitory hormone (GnIH), also called RFamide-related peptide 3 (RFRP) in mammals, which is a potent inhibitory regulator of gonadotropin-releasing hormone (GnRH) and gonadotropin, is involved in stress-induced reproductive dysfunction. GnIH/Rfrp (the gene coding RFRP-3) expression and activity are increased by psychological and immune stress, and this alteration suppresses GnRH and gonadotropin secretion...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28423512/kinase-analysis-of-penile-squamous-cell-carcinoma-on-multiple-platforms-to-identify-potential-therapeutic-targets
#11
Eddy S Yang, Christopher D Willey, Amitkumar Mehta, Michael R Crowley, David K Crossman, Dongquan Chen, Joshua C Anderson, Gurudatta Naik, Deborah L Della Manna, Tiffiny S Cooper, Guru Sonpavde
Penile squamous cell carcinoma (PSCC) is an orphan malignancy with poorly understood biology and suboptimal systemic therapy. Given that kinases may be drivers and readily actionable, we performed comprehensive multiplatform analysis of kinases in PSCC tumor and normal tissue. Fresh frozen tumors were collected from 11 patients with PSCC. After macrodissection to demarcate tumor from normal tissue, the samples underwent multiplatform analysis of kinases. Next Generation Sequencing (NGS) of 517 kinase genes was performed using Agilent Kinome capture and run on the Illumina MiSeq at PE150bp...
March 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28423456/progesterone-resistance-in-endometriosis-origins-consequences-and-interventions
#12
Bansari G Patel, Martin Rudnicki, Jie Yu, Yimin Shu, Robert N Taylor
Endometriosis is a common cause of pelvic pain and affects up to 10% of women of reproductive age. Aberrant progesterone signaling in the endometrium plays a significant role in impaired decidualization and establishment of ectopic endometrial implants. Eutopic endometrial cells from women with endometriosis fail to downregulate genes needed for decidualization, such as those involved in cell cycle regulation, leading to unbridled proliferation. Several causes of progesterone resistance in the endometrium have been postulated, including congenital "preconditioning", whereby the in utero environment renders infants susceptible to neonatal uterine bleeding and endometriosis...
April 19, 2017: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/28422380/comparing-the-long-acting-and-short-acting-forms-of-gonadotropin-releasing-hormone-agonists-in-the-long-protocol-of-ivf-icsi-cycles-a-retrospective-study
#13
Liyan Duan, Shihua Bao, Kunming Li, Xiaoming Teng, Ling Hong, Xiaoyu Zhao
AIM: This study aimed to compare the efficacy of long- and short-acting gonadotropin-releasing hormone agonist on clinical outcomes of in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI) long protocol cycles. METHODS: In this retrospective study, 478 patients were enrolled from October 2012 to November 2014. The pituitary downregulation result, serum hormone levels, gonadotropin (Gn) dose during controlled ovarian hyperstimulation, and outcome of IVF/ICSI-embryo transfer were compared between the two groups...
April 19, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28419243/the-efficacy-and-safety-of-pubertal-induction-using-17beta-estradiol-in-transgirls
#14
Sabine E Hannema, Sebastian E E Schagen, Peggy T Cohen-Kettenis, Henriette A Delemarre-van de Waal
Introduction.: Puberty suppression using GnRH agonists, followed by induction of desired sex characteristics using sex steroids, is recommended by current guidelines as the treatment of choice for gender dysphoric adolescents although little evidence is available. Aim.: To evaluate the efficacy and safety of estrogen treatment for pubertal induction in transgirls (female-identifying adolescents assigned male at birth). Methods.: 28 Adolescents treated with oral estrogen for at least 1 year were included...
April 14, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28418016/pituitary-function-pulsatile-gnrh-therapy-in-ccphd
#15
Claire Greenhill
No abstract text is available yet for this article.
April 18, 2017: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/28417429/approach-to-androgen-deprivation-in-the-prostate-cancer-patient-with-pre-existing-cardiovascular-disease
#16
REVIEW
Alyssa K Greiman, Thomas E Keane
PURPOSE OF REVIEW: Androgen deprivation therapy (ADT) is a mainstay of treatment for advanced prostate cancer. Several studies have reported an association between ADT and an increase in cardiovascular events, especially in those receiving gonadotropin-releasing hormone (GnRH) agonists compared to GnRH antagonists. We review the body of literature reporting the association of ADT and cardiovascular morbidity, and discuss the proposed mechanism of cardiovascular disease due to ADT including metabolic changes that may promote atherosclerosis and local hormonal effects that may increase plaque rupture and thrombosis...
June 2017: Current Urology Reports
https://www.readbyqxmd.com/read/28416813/brain-derived-neurotrophic-factor-val-66-met-genotype-and-ovarian-steroids-interactively-modulate-working-memory-related-hippocampal-function-in-women-a-multimodal-neuroimaging-study
#17
S-M Wei, E B Baller, P D Kohn, J S Kippenhan, B Kolachana, S J Soldin, D R Rubinow, P J Schmidt, K F Berman
Preclinical evidence suggests that the actions of ovarian steroid hormones and brain-derived neurotrophic factor (BDNF) are highly convergent on brain function. Studies in humanized mice document an interaction between estrus cycle-related changes in estradiol secretion and BDNF Val(66)Met genotype on measures of hippocampal function and anxiety-like behavior. We believe our multimodal imaging data provide the first demonstration in women that the effects of the BDNF Val/Met polymorphism on hippocampal function are selectively modulated by estradiol...
April 18, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28416763/hormone-receptor-expression-profiles-differ-between-primary-and-recurrent-high-grade-serous-ovarian-cancers
#18
Zheng Feng, Hao Wen, Xingzhu Ju, Rui Bi, Xiaojun Chen, Wentao Yang, Xiaohua Wu
Hormone receptor status assessment is necessary for selecting cancer patients who might potentially benefit from endocrine therapy. To determine whether hormone receptor status changes during tumor progression, we retrospectively examined 107 high-grade serous ovarian cancer (HGSC) patients with paired primary and recurrent tumor specimens. Hormone receptor expression discordance rates between primary and recurrent tumors were as follows: estrogen receptor (ER) 34.9%, progesterone receptor (PR) 12.4%, androgen receptor (AR) 41...
March 2, 2017: Oncotarget
https://www.readbyqxmd.com/read/28416291/cumulative-live-birth-rate-after-gnrh-agonist-trigger-and-elective-cryopreservation-of-all-embryos-in-high-responders
#19
Veljko Vlaisavljević, Borut Kovačič, Jure Knez
Elective embryo cryopreservation after using gonadotrophin-releasing hormone (GnRH) antagonist protocols and GnRH agonist triggering is becoming an increasingly important part of medically assisted reproduction. We designed a single-centre retrospective study to assess the cumulative probability of achieving a live birth through consecutive transfers of vitrified-warmed blastocysts after elective embryo cryopreservation in high-responding patients. Hence, 123 women identified to be at high risk for developing ovarian hyperstimulation syndrome were included...
April 7, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28410124/wildlife-population-management-are-contraceptive-vaccines-a-feasible-proposition
#20
Satish Kumar Gupta, Vidisha Minhas
To minimize human-animal conflicts for habitation and burden of zoonotic diseases, it is imperative to develop new strategies for wildlife population management. In this direction, contraceptive vaccines eliciting immune response against hormones/proteins critical for reproduction have emerged as one of the promising options. Contraceptive vaccines based on neutralization of gonadotropin releasing hormone (GnRH) have been used for inhibition of fertility in various species such as wild horses, white-tailed deer, pigs, cats, dogs etc...
June 1, 2017: Frontiers in Bioscience (Scholar Edition)
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