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https://www.readbyqxmd.com/read/29778669/thyroid-status-in-premenopausal-and-postmenopausal-women-a-biochemical-study-on-insulin-resistance-in-non-obese-overweight-and-obese-type-2-diabetics
#1
Rajendran Jayanthi, Abu Raghavan Srinivasan, Gopal Niranjan
BACKGROUND: Insulin resistance with altered thyroid status in women is observed in type 2 diabetics and varies with advancing age and estrogen profile. We compared thyroid status between premenopausal and postmenopausal women in obese, non obese and overweight type 2 diabetes. METHODOLOGY: We included 301type 2 diabetics who were segregated into premenopausal (n = 100) 33.2% and postmenopausal (n = 201) 66.8% among three sub groups (Non obese, overweight and Obese)...
May 10, 2018: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/29777703/bacterial-metabolite-s-equol-modulates-glucagon-like-peptide-1-secretion-from-enteroendocrine-l-cell-line-glutag-cells-via-actin-polymerization
#2
Kazuki Harada, Shoko Sada, Hidekazu Sakaguchi, Mai Takizawa, Rika Ishida, Takashi Tsuboi
S-equol is one of gut bacterial metabolites produced from soybean isoflavone daizein. While S-equol is known to promote glucose-induced insulin secretion from pancreatic β cells, whether S-equol affects glucagon-like peptide-1 (GLP-1) secretion from enteroendoceine L cells remains unclear. Here we assessed the effect of S-equol on GLP-1 secretion from mouse enteroendocrine L cell line GLUTag cells. GLUTag cells expressed GPR30 and estrogen receptors, which are putative S-equol receptors. Application of S-equol induced an increase in intracellular Ca2+ levels via GPR30...
May 16, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29773993/diabetic-cardiomyopathy-impact-of-biological-sex-on-disease-development-and-molecular-signatures
#3
REVIEW
Ryan Toedebusch, Anthony Belenchia, Lakshmi Pulakat
Diabetic cardiomyopathy refers to a unique set of heart-specific pathological variables induced by hyperglycemia and insulin resistance. Given that cardiovascular disease (CVD) is the leading cause of death in the world, and type 2 diabetes incidence continues to rise, understanding the complex interplay between these two morbidities and developing novel therapeutic strategies is vital. Two hallmark characteristics specific to diabetic cardiomyopathy are diastolic dysfunction and cardiac structural mal-adaptations, arising from cardiac cellular responses to the complex toxicity induced by hyperglycemia with or without hyperinsulinemia...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29772836/soybean-hop-alleviates-estrogen-deficiency-related-bone-loss-and-metabolic-dysfunction-in-ovariectomized-rats-fed-a-high-fat-diet
#4
Dasom Noh, Yeni Lim, Hansol Lee, Hyejin Kim, Oran Kwon
Soybeans and hops have been traditionally used as a natural estrogen replacement therapy and their major active ingredients, isoflavones and prenylflavanones, are known to have estrogenic/antiestrogenic effects depending on the target organ. However, their potential benefits are still subject to controversies. The present study investigated the dual effect of soy isoflavones plus hop prenylflavanones (Soy-Hop) on bone loss and metabolic dysfunction under estrogen deficient condition. Rats were sham-operated ( n = 10) or ovariectomized (OVX; n = 40) and then fed a high-fat diet (HFD) to develop hyperlipidemia in OVX rats within the experimental period of 8 weeks...
May 17, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29760297/follicular-hyperandrogenism-and-insulin-resistance-in-polycystic-ovary-syndrome-patients-with-normal-circulating-testosterone-levels
#5
Andi Li, Lu Zhang, Jiajia Jiang, Nan Yang, Ying Liu, Lingbo Cai, Yugui Cui, Feiyang Diao, Xiao Han, Jiayin Liu, Yujie Sun
Polycystic ovary syndrome (PCOS) is a common reproductive disease with high heterogeneity. The role of excess androgen in PCOS etiology remains disputed, since around 20%-50% of PCOS women do not display hyperandrogenemia. The microenvironment of the ovary critically influences follicular development. In the present study, we assessed the role of androgen in PCOS by investigating whether excessive follicular fluid androgen was present in PCOS patients with normal serum androgen levels and influenced by follicular fluid insulin resistance (IR)...
November 1, 2017: Journal of Biomedical Research
https://www.readbyqxmd.com/read/29750260/identification-of-mitochondrial-hormone-receptors-in-avian-muscle-cells
#6
K Lassiter, S Dridi, E Greene, B Kong, W G Bottje
The major objective of this study was to assess the expression of mitochondrial hormone receptors for progesterone (PR), estrogen (ER), glucocorticoid (GR), thyroid (TR), and insulin (IR) in avian muscle cells (quail muscle 7, QM7) and in breast muscle of quail and broilers. Visualization of receptor location in QM7 cells was accomplished by immunofluorescence. QM7 cells were stained with Mito Tracker Deep Red CMX, fixed in methanol, immune stained with anti-PR, -GR, -TR, -IR, and -ER primary antibodies overnight at 4°C, and visualized with Alexa Fluor 488-conjugated secondary antibody...
May 10, 2018: Poultry Science
https://www.readbyqxmd.com/read/29716897/prospective-randomized-biomarker-study-of-metformin-and-lifestyle-intervention-for-prevention-in-obese-women-at-increased-risk-for-endometrial-cancer
#7
Melinda S Yates, Adriana M Coletta, Qian Zhang, Rosemarie E Schmandt, Meena Medepalli, Denise R Nebgen, Beth Soletsky, Andrea Milbourne, Erma Levy, Bryan M Fellman, Diana L Urbauer, Ying Yuan, Russell R Broaddus, Karen Basen-Engquist, Karen Lu
Obesity increases risk of endometrial cancer through dysregulation of estrogen and insulin signaling. The primary aim of this study was to evaluate the impact of metformin or lifestyle intervention on endometrial proliferation in postmenopausal obese women. Secondary aims included evaluating obesity-related biomarkers and adverse events experienced. Obese, postmenopausal women with pre-diabetes were randomized into four groups for a 16-week intervention using a 2 (metformin 1700 mg/day vs placebo) x 2 (lifestyle intervention vs no lifestyle intervention) factorial design...
May 1, 2018: Cancer Prevention Research
https://www.readbyqxmd.com/read/29715189/co-exposure-to-endocrine-disruptors-effect-of-bisphenol-a-and-soy-extract-on-glucose-homeostasis-and-related-metabolic-disorders-in-male-mice
#8
Masoud Veissi, Sima Jafarirad, Akram Ahangarpour, Seyede Marjan Mohaghegh, Amal Saki Malehi
OBJECTIVES: Bisphenol A (BPA) is a xenoestrogen, which is commonly used as a monomer of polycarbonate plastics food containers and epoxy resins. Little is known about the interaction effects between xeno- and phyto- estrogens on glucose homeostasis or other metabolic disorders. The aim of this study was to examine effects of individual or combined exposure to low doses of BPA and soy extract on glucose metabolism in mice with the goal to establish its potential mechanisms. METHODS: Fifty-four male mice were randomly divided into six groups...
April 1, 2018: Endocrine Regulations
https://www.readbyqxmd.com/read/29699928/female-sex-hormones-are-necessary-for-the-metabolic-effects-mediated-by-loss-of-interleukin-18-signaling
#9
Birgitte Lindegaard, Julie Abildgaard, Sarah E Heywood, Bente K Pedersen, Mark A Febbraio
OBJECTIVE: Interleukin (IL)-18 plays a crucial role in maintaining metabolic homeostasis and levels of this cytokine are influenced by gender, age, and sex hormones. The role of gender on IL-18 signaling, however, is unclear. We hypothesized that the presence of female sex hormone could preserve the metabolic phenotype of the IL-18R-/- animals. METHODS: We studied female mice with a global deletion of the α isoform of the IL-18 receptor (IL-18R-/- ) and littermates control...
April 12, 2018: Molecular Metabolism
https://www.readbyqxmd.com/read/29692348/effects-of-insulin-and-analogues-on-carcinogen-induced-mammary-tumours-in-high-fat-fed-rats
#10
Yusaku Mori, Eunhyoung Ko, Rudolf Furrer, Linda C Qu, Stuart C Wiber, George I Fantus, Mario Thevis, Alan Medline, Adria Giacca
It is not fully clarified whether insulin glargine, an analogue with a high affinity for insulin-like growth factor 1 receptor (IGF-1R), increases the risk for cancers that abundantly express IGF-1R such as breast cancer or some types of breast cancer. To gain insight into this issue, female Sprague-Dawley rats fed a high-fat diet were given the carcinogen N-Methyl-N-nitrosourea and randomly assigned to vehicle (control), NPH (unmodified human insulin), glargine, or detemir (n=30 per treatment). Insulins were given subcutaneously (15 U kg-1 day-1) 5 days a week...
April 24, 2018: Endocrine Connections
https://www.readbyqxmd.com/read/29686616/estradiol-activates-pi3k-akt-gsk3-pathway-under-chronic-neurodegenerative-conditions-triggered-by-perinatal-asphyxia
#11
G Ezequiel Saraceno, Maria J Bellini, Luis M Garcia-Segura, Francisco Capani
Perinatal asphyxia (PA) remains as one of the most important causes of short-term mortality, psychiatric and neurological disorders in children, without an effective treatment. In previous studies we have observed that the expression of different neurodegenerative markers increases in CA1 hippocampal area of 4-months-old male rats born by cesarean section and exposed for 19 min to PA. We have also shown that a late treatment with 17β estradiol (daily dose of 250 μg/kg for 3 days) was able to revert the brain alterations observed in those animals...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29684161/impact-of-heat-stress-during-the-follicular-phase-on-porcine-ovarian-steroidogenic-and-phosphatidylinositol-3-signaling
#12
M J Dickson, C L Hager, A Al-Shaibi, P Q Thomas, L H Baumgard, J W Ross, A F Keating
Environmental conditions that impede heat dissipation and increase body temperature cause heat stress (HS). The study objective was to evaluate impacts of HS on the follicular phase of the estrous cycle. Post-pubertal gilts (126.0 ± 21.6 kg) were orally administered altrenogest to synchronize estrus, and subjected to either 5 d of thermal neutral (TN; 20.3 ± 0.5°C; n = 6) or cyclical HS (25.4 - 31.9°C; n = 6) conditions during the follicular phase preceding behavioral estrus. On d 5, blood samples were obtained, gilts were euthanized, and ovaries collected...
April 19, 2018: Journal of Animal Science
https://www.readbyqxmd.com/read/29678582/reversion-of-aging-related-dheas-decline-in-mouse-plasma-alleviates-aging-related-glucose-tolerance-impairment-by-potentiation-of-glucose-stimulated-insulin-secretion-of-acute-phase
#13
Junlei Ma, Jiang Yue, Rong Huang, Yu Liao, Shengxian Li, Wei Liu
AIMS/HYPOTHESIS: The latest research proposes mild age-related diabetes (MARD) as a subgroup of type 2 diabetes. While in human circulating dehydroepiandrosterone sulfate (DHEAS) decline with age is related to MARD, the role of circulating DHEAS in insulin secretion remains little known. METHODS: After intraperitoneal administration of glucose (2 g/kg) together with DHEAS (50 μg/kg) or equivalent DMSO to young (6-8 week old) or aging (12 month old) male C57BL/6 mice, plasma DHEAS and blood glucose were measured at indicated time point...
April 17, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29678475/both-oophorectomy-and-obesity-impaired-solely-hippocampal-dependent-memory-via-increased-hippocampal-dysfunction
#14
Duangkamol Mantor, Wasana Pratchayasakul, Wanitchaya Minta, Wissuta Sutham, Siripong Palee, Jirapas Sripetchwandee, Sasiwan Kerdphoo, Thidarat Jaiwongkum, Sirawit Sriwichaiin, Warunsorn Krintratun, Nipon Chattipakorn, Siriporn C Chattipakorn
Our previous study demonstrated that obesity aggravated peripheral insulin resistance and brain dysfunction in the ovariectomized condition. Conversely, the effect of obesity followed by oophorectomy on brain oxidative stress, brain apoptosis, synaptic function and cognitive function, particularly in hippocampal-dependent and hippocampal-independent memory, has not been investigated. Our hypothesis was that oophorectomy aggravated metabolic impairment, brain dysfunction and cognitive impairment in obese rats...
April 17, 2018: Experimental Gerontology
https://www.readbyqxmd.com/read/29644507/the-impact-of-obesity-on-breast-cancer
#15
REVIEW
Daniel F Argolo, Clifford A Hudis, Neil M Iyengar
The rates of obesity are increasing worldwide and this condition is now recognized as a leading preventable cause of cancer. Several diseases are directly related to obesity, including diabetes, hypertension, atherosclerosis, stroke, musculoskeletal disorders, and a diverse range of malignances-such as breast cancer. Obesity is associated with an increased risk of postmenopausal estrogen receptor-positive breast cancer and worse cancer-related outcomes for all breast tumor subtypes. Several mechanisms have been proposed to contribute to the obesity-cancer link, including high levels of circulating and local estrogens, altered amounts of adipokines (leptin and adiponectin), disrupted insulin/IGF signaling, modifications within the microbiome, and local and systemic effects of inflammation...
April 11, 2018: Current Oncology Reports
https://www.readbyqxmd.com/read/29627252/effects-of-rumen-undegradable-protein-on-intake-performance-and-mammary-gland-development-in-prepubertal-and-pubertal-dairy-heifers
#16
A L Silva, E Detmann, J Dijkstra, A M Pedroso, L H P Silva, A F Machado, F C Sousa, G B Dos Santos, M I Marcondes
The objective of this study was to evaluate the influence of different amounts of rumen-undegradable protein (RUP) on intake, N balance, performance, mammary gland development, carcass traits, and hormonal status of Holstein heifers at different physiological stages (PS). Sixteen prepubertal (PRE) heifers (initial BW = 106 ± 7.6 kg; age = 4.3 ± 0.46 mo) and 16 pubertal (PUB) heifers (initial BW = 224 ± 7.9 kg; age = 12.6 ± 0.45 mo) were used in an experiment over a period of 84 d. Four diets with increasing RUP contents (38, 44, 51, and 57% of dietary crude protein) and heifers at 2 PS (PRE or PUB) were used in a 4 × 2 factorial arrangement of treatments in a completely randomized design...
April 4, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29626486/diverse-actions-of-estradiol-on-anorexigenic-and-orexigenic-hypothalamic-arcuate-neurons
#17
REVIEW
Todd L Stincic, Oline K Rønnekleiv, Martin J Kelly
There is now compelling evidence for membrane-associated estrogen receptors in hypothalamic neurons that are critical for the hypothalamic control of homeostatic functions. It has been known for some time that estradiol (E2) can rapidly alter hypothalamic neuronal activity within seconds, indicating that some cellular effects can occur via membrane initiated events. However, our understanding of how E2 signals via membrane-associated receptors and how these signals impact physiological functions is only just emerging...
April 4, 2018: Hormones and Behavior
https://www.readbyqxmd.com/read/29618657/17-%C3%AE-estradiol-regulates-proglucagon-derived-peptide-secretion-in-mouse-and-human-%C3%AE-and-l-cells
#18
Sandra Handgraaf, Rodolphe Dusaulcy, Florian Visentin, Jacques Philippe, Yvan Gosmain
Clinical and experimental data indicate a beneficial effect of estrogens on energy and glucose homeostasis associated with improved insulin sensitivity and positive effects on insulin secretion. The aim of the study was to investigate the impact of estrogens on proglucagon-producing cells, pancreatic α cells, and enteroendocrine L cells. The consequences of sexual hormone deprivation were evaluated in ovariectomized mice (ovx). Ovx mice exhibited impaired glucose tolerance during oral glucose tolerance tests (OGTT), which was associated with decreased GLP-1 intestinal and pancreatic secretion and content, an effect that was reversed by estradiol (E2) treatment...
April 5, 2018: JCI Insight
https://www.readbyqxmd.com/read/29616079/-stat6-pbx2-and-pbrm1-emerge-as-predicted-regulators-of-452-differentially-expressed-genes-associated-with-puberty-in-brahman-heifers
#19
Loan T Nguyen, Antonio Reverter, Angela Cánovas, Bronwyn Venus, Stephen T Anderson, Alma Islas-Trejo, Marina M Dias, Natalie F Crawford, Sigrid A Lehnert, Juan F Medrano, Milt G Thomas, Stephen S Moore, Marina R S Fortes
The liver plays a central role in metabolism and produces important hormones. Hepatic estrogen receptors and the release of insulin-like growth factor 1 (IGF1) are critical links between liver function and the reproductive system. However, the role of liver in pubertal development is not fully understood. To explore this question, we applied transcriptomic analyses to liver samples of pre- and post-pubertal Brahman heifers and identified differentially expressed (DE) genes and genes encoding transcription factors (TFs)...
2018: Frontiers in Genetics
https://www.readbyqxmd.com/read/29614340/maternal-lipopolysaccharide-exposure-results-in-glucose-metabolism-disorders-and-sex-hormone-imbalance-in-male-offspring
#20
Mei Zhao, Li Yuan, Man-Man Yuan, Li-Li Huang, Chang Su, Yuan-Hua Chen, Yu-Ying Yang, Yan Hu, De-Xiang Xu
An adverse intrauterine environment may be an important factor contributing to the development of type 2 diabetes in later life. The present study investigated the longitudinal effects of maternal lipopolysaccharide (LPS) exposure during the third trimester on glucose metabolism and sex hormone balance in the offspring. Pregnant mice were intraperitoneally injected with LPS (50 μg/kg) daily from gestational day (GD) 15 to GD17. Glucose tolerance test (GTT) and insulin tolerance test (ITT) were assessed at postnatal day (PND) 60 and PND120...
April 1, 2018: Molecular and Cellular Endocrinology
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