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https://www.readbyqxmd.com/read/28432801/weight-loss-in-obese-girls-with-polycystic-ovarian-syndrome-is-associated-with-a-decrease-of-anti-muellerian-hormone-concentrations
#1
Thomas Reinehr, Alexandra Kulle, Juliane Rothermel, Caroline Knop, Nina Lass, Christina Bosse, Paul-Martin Holterhus
OBJECTIVE: The Anti- Muellerian Hormone (AMH) has been reported as surrogate marker of antral follicles, which are the origins of hyperandrogenism in polycystic ovarian syndrome (PCOS). Therefore, AMH may be useful for the diagnosis of PCOS. The objective was to study the longitudinal changes in AMH concentrations in girls with and without PCOS. DESIGN: This is a longitudinal study of obese girls participating in a 1-year lifestyle intervention. PATIENTS: Forty obese girls aged 13-16 years (50% with PCOS) were included in the study...
April 22, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28432332/involvement-of-gonadotropin-inhibitory-hormone-in-pubertal-disorders-induced-by-thyroid-status
#2
Mika Kiyohara, You Lee Son, Kazuyoshi Tsutsui
Thyroid disorders cause abnormal puberty, indicating interactions between the hypothalamus-pituitary-thyroid (HPT) and hypothalamus-pituitary-gonadal (HPG) axes, which are important in pubertal development. The hypothalamic gonadotropin-inhibitory hormone (GnIH) was shown to be decreased in the early prepubertal stage, suggesting the role of GnIH on pubertal onset. Here, we investigated whether thyroid dysfunction affects pubertal onset in female mice via GnIH regulation. Hypothyroidism showed delayed pubertal onset with increased GnIH expression and reduced pituitary-gonadal activity...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28432270/discriminating-between-virilizing-ovary-tumors-and-ovary-hyperthecosis-in-postmenopausal-women-clinical-data-hormonal-profiles-and-image-studies
#3
Viviane Dos Reis Vieira Yance, José Antonio Miguel Marcondes, Michelle Patrocíneo Rocha, Cristiano Roberto Grimaldi Barcellos, Wagner Silva Dantas, Ana Flavia Assis Avila, Ronaldo Hueb Baroni, Filomena Marino Carvalho, Sylvia Asaka Yamashita Hayashida, Berenice Bilharinho Mendonça, Sorahia Domenice
The presence of virilizing signs associated with high serum androgen levels in postmenopausal women is rare. Virilizing ovarian tumors (VOTs) and ovarian stromal hyperthecosis (OH) are the most common etiologies in virilized postmenopausal women. The differential diagnosis between these two conditions is often difficult. OBJECTIVE: To evaluate the contribution of clinical features, hormonal profiles and radiological studies to the differential diagnosis of VOT and OH. DESIGN: A retrospective study...
April 21, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28431984/thyroid-disrupting-pesticides-impair-the-hypothalamic-pituitary-testicular-axis-of-a-wildlife-bird-amandava-amandava
#4
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/28430864/the-gnih-lpxrfa-system-s-regulation-of-reproduction-in-the-brain-pituitary-axis-of-the-zebrafish-danio-rerio
#5
Olivia Smith Spicer, Nilli Zmora, Ten-Tsao Wong, Matan Golan, Berta Levavi-Sivan, Yoav Gothilf, Yonathan Zohar
Gonadotropin-inhibitory hormone (GNIH) was discovered in quail with the ability to reduce gonadotropin expression/secretion in the pituitary. There have been few studies on GNIH orthologs in teleosts (Lpxrfa peptides), which have provided inconsistent results. Therefore, the goal of this study was to determine the roles and modes of action by which Lpxrfa exerts its functions in the brain-pituitary axis of zebrafish (Danio rerio). We localized Lpxrfa soma to the ventral hypothalamus, with fibers extending throughout the brain and to the pituitary...
April 18, 2017: Biology of Reproduction
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
#6
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/28429258/hormonal-regulation-of-nk-cell-cytotoxic-activity
#7
S V Shirshev, I V Nekrasova, O L Gorbunova, E G Orlova
The effects of chorionic gonadotropin, estriol (E3), leptin, ghrelin, and kisspeptin on the intracellular expression of perforin, granzyme A, and granzyme B was studied in separated NK cells. All studied hormones except E3 are could modulate the expression of cytotoxic enzymes in NK cells by suppression of the expression of the most active proapoptotic agents, resulting in increased expression of granzyme A, which is typical of the decidual subpopulation of these lymphocytes.
January 2017: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/28429210/prenatal-hyperhomocysteinemia-impairs-hypothalamic-regulation-of-reproductive-cycles-in-rat-progeny
#8
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
#9
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
#10
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/28428264/cb1-cannabinoid-receptor-drives-oocyte-maturation-and-embryo-development-via-pi3k-akt-and-mapk-pathways
#11
Angela Patricia López-Cardona, Serafín Pérez-Cerezales, Raúl Fernández-González, Ricardo Laguna-Barraza, Eva Pericuesta, Naiara Agirregoitia, Alfonso Gutiérrez-Adán, Ekaitz Agirregoitia
Endocannabinoids have been recognized as mediators of practically all reproductive events in mammals. However, little is known about the role of this system in oocyte maturation. In a mouse model, we observed that activation of the cannabinoid receptor (CB)1 during in vitro oocyte maturation modulated the phosphorylation status of Akt and ERK1/2 and enhanced the subsequent embryo production. In the absence of the CB1 receptor, in vivo oocyte maturation was impaired and embryo development delayed. The CB2 receptor was unable to rescue these effects...
April 20, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28428000/selected-oxidative-stress-biomarkers-in-antenatal-diagnosis-as-11-14-gestational-weeks
#12
Marek Pietryga, Piotr Dydowicz, Kinga Toboła, Marta Napierała, Izabela Miechowicz, Anna Gąsiorowska, Maciej Brązert, Ewa Florek
The primary objective in modern obstetrics and prenatal diagnosis is to predict risks of congenital abnormalities. The aim of the research was to assess the correlation between selected oxidative stress biomarkers with the risk of foetal chromosomal aberration evaluated at the first trimester screening. A series of studies show that balanced free radical activity and oxidative homeostasis are essential for proper bodily growth and function. Reactive oxygen species (ROS) may be one of the factors associated with disruption of cell cycle and tissue development, thus leading to developmental abnormalities...
April 17, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28426619/committee-opinion-no-698-hormone-therapy-in-primary-ovarian-insufficiency
#13
(no author information available yet)
Primary ovarian insufficiency describes a spectrum of declining ovarian function and reduced fecundity due to a premature decrease in initial follicle number, an increase in follicle destruction, or poor follicular response to gonadotropins. The sequelae of primary ovarian insufficiency include vasomotor symptoms, urogenital atrophy, osteoporosis and fracture, cardiovascular disease, and increased all-cause mortality. In women with primary ovarian insufficiency, systemic hormone therapy (HT) is an effective approach to treat the symptoms of hypoestrogenism and mitigate long-term health risks if there are no contraindications to treatment...
May 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28426614/committee-opinion-no-698-summary-hormone-therapy-in-primary-ovarian-insufficiency
#14
(no author information available yet)
Primary ovarian insufficiency describes a spectrum of declining ovarian function and reduced fecundity due to a premature decrease in initial follicle number, an increase in follicle destruction, or poor follicular response to gonadotropins. The sequelae of primary ovarian insufficiency include vasomotor symptoms, urogenital atrophy, osteoporosis and fracture, cardiovascular disease, and increased all-cause mortality. In women with primary ovarian insufficiency, systemic hormone therapy (HT) is an effective approach to treat the symptoms of hypoestrogenism and mitigate long-term health risks if there are no contraindications to treatment...
May 2017: Obstetrics and Gynecology
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
#15
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
#16
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/28424471/human-luteinizing-hormone-and-chorionic-gonadotropin-display-biased-agonism-at-the-lh-and-lh-cg-receptors
#17
Laura Riccetti, Romain Yvinec, Danièle Klett, Nathalie Gallay, Yves Combarnous, Eric Reiter, Manuela Simoni, Livio Casarini, Mohammed Akli Ayoub
Human luteinizing hormone (LH) and chorionic gonadotropin (hCG) have been considered biologically equivalent because of their structural similarities and their binding to the same receptor; the LH/CGR. However, accumulating evidence suggest that LH/CGR differentially responds to the two hormones triggering differential intracellular signaling and steroidogenesis. The mechanistic basis of such differential responses remains mostly unknown. Here, we compared the abilities of recombinant rhLH and rhCG to elicit cAMP, β-arrestin 2 activation, and steroidogenesis in HEK293 cells and mouse Leydig tumor cells (mLTC-1)...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28423874/the-relationship-between-the-variants-in-the-5-utr-of-ecg-genes-and-serum-ecg-levels
#18
ShuQin Liu, Song Lian, YunZhou Yang, ChunZheng Fu, HongYing Ma, ZhiYao Xiong, Yao Ling, ChunJiang Zhao
Equine Chorionic Gonadotropin (eCG) is a gonadotrophic hormone secreted by endometrial cups of pregnant mare, which is used to induce follicular development. In the present study, single nucleotide polymorphisms (SNPs) in 5'-untranslated regions (5'-UTR) of eCG genes were screened across 10 horse breeds, including 7 Chinese indigenous breeds and 3 imported breeds. Four SNPs were identified in the 5'-UTR of the eCGα gene, and one of them was unique in the indigenous breeds. There were 2 SNPs detected at the 5' end of the eCGβ subunit gene, and one of them was only found in the Chinese breeds...
April 19, 2017: Asian-Australasian Journal of Animal Sciences
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
#19
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/28420522/successful-treatment-of-gestational-trophoblastic-neoplasia-in-the-uterine-cornus-with-laparoscopic-cornuostomy-and-postoperative-methotrexate-injection
#20
Pei-Ling Chen, Jie-Yang Jhuang, Ho-Hsiung Lin, Sheng-Mou Hsiao
OBJECTIVE: Management of cornual gestational trophoblastic neoplasia (GTN) has never been reported. Here, we describe the first case of cornual GTN. CASE REPORT: A 32-year-old woman was diagnosed with left cornual GTN after evacuation of a complete mole. Laparoscopic cornuostomy was performed with intramural vasopression injection and barbed sutures. Histopathology revealed hydropic chorionic villi. Complete hydatidiform mole was diagnosed, and treated with adjuvant methotrexate, to address the poor decline of β-human chorionic gonadotropin levels during follow-up...
April 2017: Taiwanese Journal of Obstetrics & Gynecology
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