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Oestradiol insulin

Yi Zhang, Shan-Wen Zhang, Neeta Khandekar, Shi-Fei Tong, He-Qin Yang, Wan-Ru Wang, Xu-Feng Huang, Zhi-Yuan Song, Shu Lin
The estrogen levels in the pre and post menstrual phases interact with brain-derived neurotrophic factor in a complex manner, which influences the overall state of the body. To study the role of oestradiol and brain-derived neurotrophic factor in modulating obesity related type 2 diabetes and the interactions between two factors, we enrolled 15 diabetic premenopausal women and 15 diabetic postmenopausal women respectively, the same number of healthy pre and postmenopausal women were recruited as two control groups...
December 16, 2016: Endocrine
Adela Brahimaj, Taulant Muka, Maryam Kavousi, Joop S E Laven, Abbas Dehghan, Oscar H Franco
AIMS/HYPOTHESIS: Previous literature documents controversial results for the impact of dehydroepiandrosterone (DHEA) in glucose metabolism. We aimed to assess the associations between serum levels of DHEA and its main derivatives DHEA sulphate (DHEAS) and androstenedione, as well as the ratio of DHEAS to DHEA, and risk of type 2 diabetes. METHODS: We used data on serum levels of DHEA, DHEAS and androstenedione from 5189 middle-aged and elderly men and women from the prospective population-based Rotterdam Study...
January 2017: Diabetologia
Xue Zhang, Li-Juan Fu, Xue-Qing Liu, Zhuo-Ying Hu, Yu Jiang, Ru-Fei Gao, Qian Feng, Xi Lan, Yan-Qing Geng, Xue-Mei Chen, Jun-Lin He, Ying-Xiong Wang, Yu-Bin Ding
STUDY QUESTION: Does nm23 have functional significance in decidualization in mice and humans? SUMMARY ANSWER: nm23 affects decidualization via the phosphoinositide 3 kinase/mammalian target of rapamycin (PI3K-Akt-mTOR) signaling pathways in mouse endometrial stromal cells (ESCs; mESCs) and human ESCs. WHAT IS KNOWN ALREADY: The function of nm23 in suppressing metastasis has been demonstrated in a variety of cancer types. nm23 also participates in the control of DNA replication and cell proliferation and differentiation...
October 2016: Human Reproduction
María F Andreoli, Cora Stoker, Gisela P Lazzarino, Guillermina Canesini, Enrique H Luque, Jorge G Ramos
Removing dietary phyto-oestrogens in adult male rats causes obesity and diabetes. As whey proteins have been reported to reduce food intake and improve glucose homoeostasis, we investigated whether they could attenuate susceptibility to obesity and diabetes due to phyto-oestrogen deprivation. To this end, thirty male Wistar rats were fed a high-phyto-oestrogen (HP) or a phyto-oestrogen-free (PF) diet for 10 weeks; six rats from each group were killed. The remaining HP animals (six animals) continued receiving the HP diet for 6 weeks...
September 2016: British Journal of Nutrition
C Kawashima, M Munakata, M Matsui, A Miyamoto, K Kida, T Shimizu
Insulin-like growth factor-1 (IGF-1) is one of the important factors for growth, milk production and reproductive functions and mainly released from the liver in response to growth hormone (GH) via GH receptor (GHR) in cattle. Recently, some single nucleotide polymorphisms (SNPs) were identified in the bovine GHR gene. Some GHR-SNPs were shown to be related to plasma IGF-1 concentration in cattle. Hence, the capacity to IGF-1 production in the liver might be affected by GHR-SNP and associated with performance in the future...
December 2016: Journal of Animal Physiology and Animal Nutrition
Vaibhav Ingle, Prafulla Kumar Maharana
A middle-aged woman presented with premature menopause and recurrent episodes of vomiting with hyponatraemia. Since primary causes of hormone deficiencies were the only studies initially evaluated, there was a delayed diagnosis. Pituitary tropic hormones (serum thyroid stimulating hormone/follicle stimulating hormone/luteinising hormone), inappropriately low for low-level of target hormones (free thyroxin/oestradiol), led to detailed evaluation of trophic hormone deficiencies by pituitary stimulation. The pituitary stimulation by insulin challenge test confirmed secondary (pituitary) hypofunction...
May 6, 2016: BMJ Case Reports
C Lewerin, H Johansson, M K Karlsson, M Lorentzon, U H Lerner, J M Kindblom, C Ohlsson, U Smith, D Mellström
BACKGROUND: It has been suggested that osteoblasts are involved in the regulation of haematopoietic stem cells. Whether osteocalcin, which is derived from osteoblasts and is metabolically active, influences blood haemoglobin (Hb) levels is not known. OBJECTIVE: To determine whether plasma osteocalcin is a determinant of Hb in elderly men. METHODS: A total of 993 men (mean age 75.3 ± 3.2 years) participated in the population-based MrOS (osteoporotic fractures in men) study...
October 2016: Journal of Internal Medicine
S A El Tarhouny, S S Zakaria, A M Abdu-Allah, K M Hadhoud, M I Mahmoud, O M Al Nozha
OBJECTIVES: Conditions of hypoandrogenism in men have been linked to insulin resistance, suggesting that alterations in normal sex steroid physiology could play a role in the pathogenesis of Type 2 diabetes mellitus (T2DM). Sex hormone-binding globulin (SHBG) gene polymorphisms may be the cause of sex steroid alteration. The aim of this work is to study the effect of SHBG gene polymorphisms on the risk of T2DM through its impact on testosterone and oestradiol level in Egyptian men. SUBJECTS AND METHODS: A case control study was performed in the diabetes clinic at Zagazig University Hospital on 185 males with Type 2 diabetes and their matched healthy controls...
September 2015: West Indian Medical Journal
Y Yang, K Landin-Wilhelmsen, H Zetterberg, G Oleröd, J Isgaard, C Wikkelsö
BACKGROUND: Hypopituitarism has been reported in patients with idiopathic normal pressure hydrocephalus (iNPH), which could enhance characteristic symptoms like impaired wakefulness, gait, body balance, and subcortical cognitive deterioration. PURPOSE: To compare basal serum levels of pituitary and sex hormones and serum insulin-like growth factor-1 (S-IGF-1) in patients with iNPH and an age-matched control population, and to correlate the preoperative hormone levels with symptoms and signs pre-operatively and three months after surgery...
December 2015: Growth Hormone & IGF Research
Shakunthala Narayanaswamy, Channa N Jayasena, Noel Ng, Risheka Ratnasabapathy, Julia K Prague, Deborah Papadopoulou, Ali Abbara, Alexander N Comninos, Paul Bassett, Stephen R Bloom, Johannes D Veldhuis, Waljit S Dhillo
BACKGROUND AND OBJECTIVE: Kisspeptin stimulates hypothalamic GnRH secretion resulting in gonadotrophin release and has potential as a future therapeutic. Chronic subcutaneous infusion of kisspeptin via a pump (similar to an insulin pump) may provide an alternative route of administration in the future. We investigated for the first time in humans, the gonadotrophin response to subcutaneous (SC) infusions of kisspeptin-54 in healthy women. Women are markedly more responsive to exogenous kisspeptin in the late follicular phase preovulation when oestradiol levels are naturally high...
June 2016: Clinical Endocrinology
A C S Castilho, C A Price, F Dalanezi, R L Ereno, M F Machado, C M Barros, B G Gasperin, P B D Gonçalves, J Buratini
There is evidence that regulation of follicle selection in cattle involves locally produced growth factors. In the present study, we investigated the expression of members of the fibroblast growth factor (FGF) 7 family during follicle deviation. The largest and second largest follicles were recovered during the second day of a synchronised follicle wave and the future dominant and future subordinate follicles were identified based on diameter and cytochrome P450, family 19, subfamily A, polypeptide 1 (CYP19A1) mRNA levels in granulosa cells...
July 21, 2015: Reproduction, Fertility, and Development
B Berisha, D Schams, D Rodler, M W Pfaffl
In the ovary, the development of new capillaries from pre-existing ones (angiogenesis) is a complex event regulated by numerous local factors. The dominant regulators of angiogenesis in ovarian follicles and corpora lutea are the vascular endothelial growth factor (VEGF), fibroblast growth factor (FGF), insulin-like growth factor (IGF), angiopoietin (ANPT) and hypoxia-inducible factor (HIF) family members. Antral follicles in our study were classified according to the oestradiol-17-beta (E2) content in follicular fluid (FF) and were divided into five classes (E2 < 0...
April 2016: Anatomia, Histologia, Embryologia
I Haj-Husein, S Tukan, F Alkazaleh
BACKGROUND: In traditional medicine, marjoram herb (Origanum majorana) is locally reputed for its ability to restore hormonal balance and to regulate the menstrual cycle. Therefore, this pilot study aimed to investigate the effects of marjoram tea on the hormonal profile of women with polycystic ovary syndrome (PCOS) in a randomised, double-blind, placebo-controlled trial. METHODS: Twenty-five patients were assigned to receive marjoram tea or a placebo tea twice daily for 1 month (intervention group: n = 14; placebo group: n = 11)...
February 2016: Journal of Human Nutrition and Dietetics: the Official Journal of the British Dietetic Association
Rex John Scaramuzzi, Nesrine Zouaïdi, Jean-Baptiste Menassol, Joëlle Dupont
BACKGROUND: A short-term increase in food intake and specifically dietary energy can stimulate folliculogenesis and increase ovulation rate in ewes. The mechanism appears to involve the insulin-glucose metabolic system and its interaction with FSH signalling pathways in the granulosa cells of ovarian follicles. This experiment was designed to investigate the interaction between these two systems in the granulosa cells of ovarian follicles. METHODS: Thirty six Ile-de-France ewes were used in this controlled experiment to study the effects of intravenous glucose on folliculogenesis...
2015: Reproductive Biology and Endocrinology: RB&E
Beenish Shahid, Samina Jalali, Muhamad Ijaz Khan, Sa Shami
The objective of the present study was to investigate the cumulus expansions of Nili Ravi buffalo oocytes during cultured in TCM-199 supplemented with 2 μg/ml oestradiol (E(2)), 0.05 IU/ml recombinant human follicle stimulating hormone (rhFSH), 2IU/ml human chorionic gonadotrophin (hCG), and 0.12 IU/ml insulin (I). The cumulus oocytes complexes (COCs) were collected from 2-8mm follicles from local abattoir ovaries. Supplementation of medium with single hormones showed significant (P<0.0001) increase in mean diameter of COCs with rhFSH except E(2), hCG and insulin after 24 hours compared to the increase in the mean diameter of COCs matured in TCM-199 without any hormonal supplementation...
January 2015: Pakistan Journal of Pharmaceutical Sciences
S Maffei, G Galeati, G Pennarossa, T A L Brevini, G Gandolfi
The different structures of a mammalian ovary require complex 3-dimensional interactions to function properly. It is difficult to access the ovary in vivo and to study its physiology in vitro, it is necessary to dissect its different parts and culture them individually. Although informative, this approach prevents the understanding of the role played by their interactions. Perfusion systems are available for ovaries of laboratory animals while organs of larger species have been maintained in culture only for a few hours...
December 2014: Reproduction, Fertility, and Development
B L Needham, C Kim, B Mukherjee, P Bagchi, F Z Stanczyk, A M Kanaya
AIMS: To examine the associations between endogenous sex steroid hormones (oestradiol, testosterone and sex hormone-binding globulin) with diabetes risk in a South-Asian population living in the USA. METHODS: We used data from the Metabolic Syndrome and Atherosclerosis in South-Asians Living in America pilot study. The analytical sample included 60 women and 45 men of Asian Indian origin living in the San Francisco Bay Area, who were free from diabetes and cardiovascular disease and did not use exogenous sex steroids...
September 2015: Diabetic Medicine: a Journal of the British Diabetic Association
R Chavoshinejad, W F A Marei, G M Hartshorne, A A Fouladi-Nashta
The aim of the present study was to investigate the hormonal regulation of hyaluronan (HA) components in sheep granulosa cells. HA components are present in the reproductive tract and have a range of physical and signalling properties related to reproductive function in several species. First, abattoir-derived ovaries of sheep were used to determine the localisation of HA synthase (HAS) 1-3 and CD44 proteins in antral follicles. Staining for HAS1-3 and CD44 proteins was most intense in the granulosa layer. Accordingly, the expression of HAS2, HAS3 and CD44 mRNA was measured in cultured granulosa cells exposed to 0-50ngmL(-1) of 17β-oestradiol and different combinations of oestradiol, gonadotropins, insulin-like growth factor (IGF)-1 and insulin for 48-96h (1ngmL(-1) FSH, 10ngmL(-1) insulin, 10ngmL(-1) IGF-1, 40ngmL(-1) E2 and 25ngmL(-1) LH...
April 2016: Reproduction, Fertility, and Development
C Fergani, Je Routly, Dn Jones, Lc Pickavance, Rf Smith, H Dobson
The aim of this study was to investigate how acute insulin-induced hypoglycaemia (IIH) alters the activity of cells containing oestradiol receptor α (ERα) or somatostatin (SST) in the arcuate nucleus (ARC) and ventromedial nucleus (VMN), and ERα cells in the medial preoptic area (mPOA) of intact ewes. Follicular phases were synchronized with progesterone vaginal pessaries. Control animals were killed at 0 h or 31 h (n = 5 and 6, respectively) after progesterone withdrawal (PW; time zero). At 28 h, five other animals received insulin (INS; 4 iu/kg) and were subsequently killed at 31 h...
February 2015: Reproduction in Domestic Animals, Zuchthygiene
Ingemar Swenne, Mats Stridsberg
Adolescents with eating disorders (ED) are at risk of developing osteoporosis if weight is not recovered. Previous investigations do not separate the effects of weight change per se from those of concomitant hormonal changes. In this investigation serum osteocalcin (OC), C-terminal telopeptide of collagen (CTX), insulin-like growth factor-1 (IGF-1) and oestradiol were measured at assessment of 498 girls with ED and during weight gain of 59 girls. At assessment, OC concentrations were associated independently with weight (change), IGF-1 and oestradiol...
March 2015: Eating and Weight Disorders: EWD
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