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luteinizing hormones

Xueting Wang, Jie Ding, Zou Xiang, Peipei Jiang, Jing Du, Xiaodong Han
Microcystin-LR (MC-LR), which generates strong reproductive toxicity, reduces serum testosterone level without directly damaging Leydig cells. The purpose of this study was to identify the target cells of MC-LR in the rat hypothalamic-pituitary axis and to investigate the underlying mechanisms. We found that the gonadotropin-releasing hormone (GnRH) neurons were the direct target of MC-LR. In vivo results showed that upon exposure to rats, cells around the third ventricle of hypothalamus underwent apoptosis...
October 20, 2016: Toxicon: Official Journal of the International Society on Toxinology
Timothy J Marquis, Masumi Nozaki, Wayne Fagerberg, Stacia A Sower
In the adenohypophysis (anterior pituitary) of all gnathostomes, there are six tropic cell types: corticotropes, melanotropes, somatotropes, lactotropes, gonadotropes and thyrotropes; each cell type produces specific tropic hormones. In contrast, we report in this study that there are only four tropic cell types in the sea lamprey (Petromyzon marinus) adenohypophysis. We specifically focused on the cell types that produce the glycoprotein hormones (GpHs). The gnathostome adenohypophyseal GpHs are follicle-stimulating hormone (FSH), luteinizing hormone (LH), thyroid-stimulating hormone (TSH), and thyrostimulin...
October 22, 2016: Cell and Tissue Research
Yakun Wang, Xiaoqiong Hao, Jing Yang, Jia Li, Meijia Zhang
A surge of luteinizing hormone (LH) from the pituitary gland induces the expression of the epidermal growth factor (EGF)-like factors, which triggers oocyte maturation, cumulus expansion, and ovulation. How LH induces EGF-like factor expression is unclear. In the present study, a rapid increase of phosphorylated cAMP response element binding protein (CREB) was observed after the activation of LH receptor by human chorionic gonadotropin. Large antral follicles from equine chorionic gonadotropin-primed mice were cultured in medium with LH to stimulate the expression of EGF-like factors...
October 22, 2016: Molecular Reproduction and Development
Deepika Garg, Zaher Merhi
BACKGROUND: Women with PCOS have elevated levels of the harmful Advanced Glycation End Products (AGEs), which are highly reactive molecules formed after glycation of lipids and proteins. Additionally, AGEs accumulate in the ovaries of women with PCOS potentially contributing to the well-documented abnormal steroidogenesis and folliculogenesis. MAIN BODY: A systematic review of articles and abstracts available in PubMed was conducted and presented in a systemic manner...
October 21, 2016: Reproductive Biology and Endocrinology: RB&E
Toshiyuki Iwahata, Takeshi Shin, Yukihito Shimomura, Keisuke Suzuki, Tomohiro Kobayashi, Akane Miyata, Yoshitomo Kobori, Shigehiro Soh, Hiroshi Okada
OBJECTIVES: To present a single-center experience with testicular sperm extraction and intracytoplasmic sperm injection for fathering biological children in patients with ejaculatory dysfunction as a result of spinal cord injury. METHODS: Testicular sperm extraction was carried out in 52 male patients with ejaculatory dysfunction as a result of spinal cord injury. We investigated sperm retrieval rates and pregnancy rates from medical records. Data on age, testicular volume, hormonal status (luteinizing hormone, follicle stimulating hormone and testosterone), and time since spinal cord injury were obtained and analyzed to detect potential associations with the presence of spermatogenesis...
October 21, 2016: International Journal of Urology: Official Journal of the Japanese Urological Association
Guanhua Fu, Junfei Ma, Lihong Wang, Xin Yang, Jeruei Liu, Xin Zhao
Zearalenone (ZEA), an estrogenic mycotoxin, is mainly produced by Fusarium fungi. In this study, Bacillus licheniformis CK1 isolated from soil with the capability of degrading ZEA was evaluated for its efficacy in reducing the adverse effects of ZEA in piglets. The gilts were fed one of the following three diets for 14 days: a basic diet for the control group; the basic diet supplemented with ZEA-contaminated basic diet for the treatment 1 (T1) group; and the basic diet supplemented with fermented ZEA-contaminated basic diet by CK1 for the treatment 2 (T2) group...
October 17, 2016: Toxins
Funda Akpinar, Berna Dilbaz, Derya A Cırık, Saynur Yilmaz, Sadiman Kiykac, Ertugrul Karahanoglu, Leyla Mollamahmutoglu
To investigate factors associated with the response to ovarian stimulation in patients with polycystic ovary syndrome. Methods: The records of patients with polycystic ovary syndrome and infertility who underwent ovulation induction with clomiphene citrate were reviwed between January 2011 and December 2014 in Etlik Zübeyde Hanim Women's Health Training and Research Hospital Ankara, Turkey. The anthropometric and endocrine factors of patients who were resistant to treatment at a dose of 150 mg/day (n=84) were compared with those who responded with growth of at least one graaffian follicle at a dose of 50 mg/day (n=342)...
November 2016: Saudi Medical Journal
Yiyan Wang, Kaiming Yuan, Xiaoheng Li, Zhijian Su, Xingwang Li, Hongguo Guan, Ying Su, Hong-Shan Ge, Ren-Shan Ge
Leukemia inhibitory factor (LIF) has many physiological roles. However, its effects on Leydig cell development are still unclear. Rat immature and adult Leydig cells were cultured with different concentrations of LIF alone or in combination with luteinizing hormone (LH) for 24 h. LIF (1 and 10 ng/ml) significantly increased androgen production in immature Leydig cells, but had no effects on testosterone production in adult Leydig cells. Further studies revealed that LIF dose-dependently increased Star and Hsd17b3 expression levels in immature Leydig cells...
October 19, 2016: Growth Factors
Fang Meng, Pei-Bei Duan, Junya Zhu, Qing-Qing Lou, Zhao-Hui Fang, Hong-Li An, Lan-Ying Liu, Yue Hu, Qian Hu
OBJECTIVE: This study aims to evaluate the effectiveness and safety of Gua sha therapy on perimenopausal symptoms, quality of life, and serum female hormones in participants with perimenopausal syndrome. METHODS: A prospective, randomized, controlled clinical trial was conducted at the First Affiliated Hospital of Nanjing University of Chinese Medicine in China. Eighty women with perimenopausal syndrome were recruited and randomized into an intervention group or a control group...
October 10, 2016: Menopause: the Journal of the North American Menopause Society
S Pejić, A Todorović, V Stojiljković, I Pavlović, L Gavrilović, N Popović, S B Pajović
Endometrial tissue is under a strong influence of sex hormones. These hormones are considered as developmental factors of endometrial hyperplasia and endometrial cancer. We examined the influence of gonadotropins (follicle-stimulating and luteinizing hormone) and sex hormones (estradiol, progesterone) on oxidant/antioxidant parameters in blood and endometrial tissue of women with complex endometrial hyperplasia. In blood, superoxide dismutase activity was significantly higher in luteal phase and postmenopause compared to the follicular phase...
September 30, 2016: Cellular and Molecular Biology
Rose G Radin, Lindsey A Sjaarda, Neil J Perkins, Robert M Silver, Zhen Chen, Laurie L Lesher, Noya Galai, Jean Wactawski-Wende, Sunni L Mumford, Enrique F Schisterman
CONTEXT: Among women with a single, recent pregnancy loss, daily preconception low-dose aspirin (LDA) increased the live birth rate with no effect on pregnancy loss. The mechanism underlying this effect is unclear, but it may work through ovulation. OBJECTIVE: We estimated the effect of LDA on the per-cycle risk of anovulation among eumenorrheic women. DESIGN: The Effects of Aspirin in Gestation and Reproduction trial, a multi-center, randomized, double-blind, placebo-controlled trial of daily LDA on reproductive outcomes...
October 18, 2016: Journal of Clinical Endocrinology and Metabolism
Riikka S K Takala, Riku Kiviranta, Klaus T Olkkola, Tero Vahlberg, Dan Laukka, Anna Kotkansalo, Melissa Rahi, Matti Sankinen, Jussi Posti, Ari Katila, Jaakko Rinne
PURPOSE: The aim was to assess anterior pituitary hormone levels during the acute phase of aneurysmal subarachnoid hemorrhage (aSAH) and analyze the possible association with the clinical condition and outcome. MATERIAL AND METHODS: Forty patients with aSAH whose aneurysm was secured by endovascular coiling were enrolled. Basal secretions of cortisol, testosterone, luteinizing hormone (LH), prolactin (PRL), and sex hormone binding globulin (SHBG) levels were measured up to 14 days after the incident...
October 18, 2016: Endocrine Research
Raquel Ajo, Ana Segura, Laura Mira, María-Del-Mar Inda, Rocío Alfayate, Angel Sánchez-Barbie, César Margarit, Ana M Peiró
BACKGROUND: Opioids are an effective treatment for chronic non-malignant pain (CNP). Long-term use risks and side effects such as opioid-induced androgen deficiency (OPIAD) exist. This could be measured by saliva testosterone (Sal-T). OBJECTIVES: To evaluate OPIAD in long-term opioid use in CNP patients. METHODS: A cross-sectional study included CNP male outpatients under opioid treatment. Total-Testosterone (Total-T), Free-Testosterone (Free-T), Bio-Testosterone (Bio-T) and Sal-T were measured...
October 18, 2016: Aging Male: the Official Journal of the International Society for the Study of the Aging Male
N S Mehl, S Srisuwatanasagul, T Swangchan-Uthai, S Sirivaidyapong, M Khalid
Effect of a GnRH-agonist (deslorelin) was studied on reproductive function and ovarian luteinizing hormone receptor (LHR) and follicle stimulating hormone receptor (FSHR) expression in prepubertal female cats that were either implanted with 4.7-mg deslorelin (implanted: n = 6) or not (controls: n = 18) or ovariohysterectomized at prepubertal age (prepubertal OVH: n = 6). Body weights, fecal estradiol, and sexual behavior of implanted and control cats were monitored for 48 weeks followed by collection of ovaries and uteri...
September 9, 2016: Theriogenology
Khairy M A Zoheir, Gamaleldin I Harisa, Ahmed A Allam, Ligu Yang, Xiang Li, Aixin Liang, Ahmed A Abd-Rabou, Abdel Halim Harrath
The present study aimed to evaluate the in vitro effect of alpha lipoic acid (ALA) addition to the culture medium on the development of the bovine secondary preantral follicles. Bovine secondary preantral follicles were collected and divided into two groups depending on their size (80-100 μm and 100-110 μm). They were cultured in vitro for 15 days (D) using different media including at three different doses of ALA. The genes expression levels of follicle-stimulating hormone beta-subunit (FSHR), insulin-like growth factor (IGF-1), Activin, luteinizing hormone/choriogonadotropin receptor, bone morphogenetic protein receptor type IA, transforming growth factor beta receptor 1, growth differentiation factor 9, BCL2-associated X protein (BAX), and C-Myc were studied using real-time polymerase chain reaction...
September 13, 2016: Theriogenology
Peter A Lee, Margaret Luce, Peter Bacher
BACKGROUND: Peak gonadotropin-releasing hormone or agonist (GnRHa) stimulated luteinizing hormone (LH) testing with leuprolide acetate (LA) is commonly used to document suppression during therapy for central precocious puberty (CPP). The objective of the study was to investigate suitability of using basal LH levels to monitor GnRHa treatment and to determine optimal transition from 1-month to 3-month LA formulations via a post hoc analysis of a randomized, open-label, 6-month study. METHODS: A total of 42 children with CPP, pretreated with 7...
October 14, 2016: Journal of Pediatric Endocrinology & Metabolism: JPEM
Xiaoning Li, Oleh Taratula, Olena Taratula, Canan Schumann, Tamara Minko
Targeted delivery of therapeutic and diagnostic agents to cancer sites has significant potential to improve the therapeutic outcome of treatment while minimizing severe side effects. It is widely accepted that decoration of the drug delivery systems with targeting ligands that bind specifically to the receptors on the cancer cells is a promising strategy that may substantially enhance accumulation of anticancer agents in the tumors. Due to the transformed cellular nature, cancer cells exhibit a variety of overexpressed cell surface receptors for peptides, hormones, and essential nutrients, providing a significant number of target candidates for selective drug delivery...
October 13, 2016: Mini Reviews in Medicinal Chemistry
Ashraf Alyasin, Shayesteh Mehdinejadiani, Marzieh Ghasemi
Routinely, a bolus of 5.000-10.000 IU human chorionic gonadotropin (hCG) is used for the final follicular maturation and ovulation as a standard method. HCG has the same effect of luteinizing hormone (LH) with long half-life. It has the long lutheotrophic effect which increases the risk of ovarian hyper stimulation syndrome (OHSS). Recently, gonadotropin-releasing hormone agonist (GnRH-a) trigger has been used for the induction of final follicular maturation and ovulation with the aim of reducing the OHSS risk...
September 2016: International Journal of Reproductive Biomedicine (Yazd, Iran)
Fu Mei, Xu Kehui, Xu Wenming
Dicer, an RNAse III endonuclease, is critical for the biogenesis of small noncoding RNAs (microRNAs), including the biogenesis of microRNAs and small interfering RNAs, which transcriptionally and post-transcription ally regulate mRNA expression through binding to target mRNA and leading to subsequent mRNA degradation. Recent studies show that Dicer plays important roles in cell proliferation, differentiation and apoptosis. It has been attracted more and more attention in the reproductive field. In the male reproduction field, mouse model shows that Dicer is critical for the development of spermatogenic cell, sperm maturation, sperm motility and morphology...
July 20, 2016: Yi Chuan, Hereditas
Theophilus E Ugwu, Rosemary T Ikem, Babatope A Kolawole, Ignatius U Ezeani
OBJECTIVE: To determine the prevalence of hypogonadism in men with type 2 diabetes mellitus and evaluate its clinical and pathologic correlates. SUBJECTS AND METHODS: In a cross-sectional survey of 200 type 2 diabetic males aged 32-69 years, total testosterone (TT), follicle stimulating hormone, luteinizing hormone, waist circumference (WC), glycated hemoglobin, and lipids were measured. Clinical assessment of androgen deficiency was done using the androgen deficiency in aging male (ADAM) questionnaire...
September 2016: Indian Journal of Endocrinology and Metabolism
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