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Growth Hormone AND IGF-1

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https://www.readbyqxmd.com/read/28211546/differential-effects-of-hormones-on-cellular-metabolism-in-keratoconus-in-vitro
#1
Tina B McKay, Jesper Hjortdal, Henrik Sejersen, Dimitrios Karamichos
Keratoconus (KC) is a corneal thinning disease with an onset commonly immediately post-puberty and stabilization by 40 to 50 years of age. The role of hormones in regulating corneal tissue structure in homeostatic and pathological conditions is unknown. Our group recently linked altered hormone levels to KC. Our current study sought to investigate and delineate the effects of exogenous hormones, such as androgen, luteotropin, and estrogen, on corneal stroma bioenergetics. We utilized our established 3D in vitro model to characterize the effects of DHEA, prolactin, 17β-estradiol on insulin-growth factor-1 and -2 (IGF-1, -2) signaling and metabolic function in primary corneal fibroblasts from healthy controls (HCFs) and KC patients (HKCs)...
February 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28211028/short-term-supra-physiological-rhgh-administration-induces-transient-dna-damage-in-peripheral-lymphocytes-of-healthy-women
#2
C Fantini, P Sgrò, M Pittaluga, A de Perini, I Dimauro, A Sartorio, D Caporossi, L Di Luigi
PURPOSE: While a good safety for recombinant human growth hormone (rhGH) therapy at replacement doses is recognized, a possible link between high concentration of the GH-IGF-I axis hormones and side negative effect has been reported. The aim of this pilot study was to assess whether a short-term exposure to supra-physiological doses of rhGH may affect DNA integrity in human lymphocytes (PBL). METHODS: Eighteen healthy Caucasian female (24.2 ± 3.5 years) were randomly included in a Control (n = 9) and rhGH administration group (n = 9, 3-week treatment)...
February 16, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28198714/downregulation-of-circulating-insulin-like-growth-factor-1-contributes-to-memory-impairment-in-aged-mice-after-sevoflurane-anesthesia
#3
Jue Jiang, Xiang Lv, Xiaoyang Wu, Yaqiong Yang, Hong Jiang
Insulin-like growth factor 1 (IGF-1) is a neuroprotective hormone and a decrease in levels of circulating IGF-1 contributes toward cognitive decline. The aim of this study was to investigate the effect of sevoflurane on the level of circulating IGF-1 and cognitive function in aged mice and the role of circulating IGF-1 in the cognitive dysfunction induced by sevoflurane. Aged mice were exposed to 1 or 2 minimal alveolar concentrations of sevoflurane for 4 or 8 h. Before and after the exposure, blood was collected from the tail vein and serum IGF-1 was measured by an enzyme-linked immunosorbent assay...
February 14, 2017: Behavioural Pharmacology
https://www.readbyqxmd.com/read/28196954/metformin-and-thyroid-disease
#4
Xianghui Meng, Shuhang Xu, Guofang Chen, Michael Derwahl, Chao Liu
An intriguing area of research in thyroidology is the recently discovered association of insulin resistance with thyroid functional and morphological abnormalities. Individuals with hyperinsulinemia have larger thyroid gland and a higher prevalence of thyroid nodules and cancer. Accordingly, patients treated with metformin have a smaller thyroid volume and a lower risk of incident goiter, thyroid nodule and cancer. Multiple studies in vitro and in vivo have demonstrated that metformin can inhibit the growth of thyroid cells and different types of thyroid cancer cells by affecting the insulin/IGF-1 and mTOR pathways...
February 14, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28185934/corticosteroids-deeply-depress-the-in-vitro-steroidogenic-capacity-of-eurasian-perch-ovary-at-the-end-of-the-reproductive-cycle
#5
S N M Mandiki, S Milla, S Nkogo Robles, P Kestemont
Corticosteroids play positive or negative role in the reproductive mechanisms of many fish species but the physiological contexts relating to such biphasic actions are not well defined. In the present study we investigated to what extent corticosteroids (cortisol-Co, 11-deoxycorticosterone-DOC) hormones may interfere with the steroidogenic capacity of Eurasian perch follicles, and we tested whether the negative interference of corticosteroids may be mitigated by potential stimulating endocrine factors, namely insulin-like growth factor-1 (IGF), human chorionic gonadotropin (HCG) or thyroid hormones (Triidothyronine-T3, thyroxine-T4)...
February 6, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28166977/caloric-restriction-and-igf-i-administration-promote-rabbit-fecundity-possible-interrelationships-and-mechanisms-of-action
#6
Alexander V Sirotkin, Iveta Koničková Florkovičová, Olga Østrup Švarcová, Jan Rafay, Jozef Laurincik, Abdel Halim Harrath
The aim of these in vivo and in vitro studies was to examine the influence of caloric restriction (CR), and the administration of insulin-like growth factor (IGF-I), on rabbit fecundity and to understand the interrelationships between CR and IGF-I, as well as the endocrine and intracellular mechanisms of their effects. Female rabbits were subjected to 50% CR, injections of IGF-I (20 μg/animal/day) and a combination of the two for 10 d before and 2 d after ovulation induced by 25 IU PMSG and 0.25 IU hCG...
March 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28164755/regulation-of-na-k-atpase-by-estradiol-and-igf-1-in-cardio-metabolic-diseases
#7
Milan Obradovic, Julijana Stanimirovic, Anastasija Panic, Nikola Bogdanovic, Emina Sudar-Milovanovic, Desanka Cenic-Milosevic, Esma R Isenovic
BACKGROUND: The sodium/potassium- adenosine- triphosphatase (Na+/K+-ATPase) is an important mediator in vasculature tone and contractility, and its abnormal regulation has been implicated in many diseases such as obesity, insulin resistance, diabetes, and hypertension. Decreased Na+/K+-ATPase abundance and its altered isoform expression induce cardiomyocytes death and cardiac dysfunction, possibly leading to the development of myocardial dilation and heart failure. Therefore, the regulation of Na+/K+-ATPase activity/expression could be important in treatment and possible prevention of cardio-metabolic diseases...
February 3, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28163019/interrelationships-between-ovarian-follicles-grown-in-culture-and-possible-mediators
#8
Alexander V Sirotkin, Iveta Florkovičová Koničková, Hans-Jorg Schaeffer, Jozef Laurincik, Abdel Halim Harrath
Dominance or cooperation between ovarian follicles can determine the number of ovulations and fecundity, but interrelationships between follicles in mono- and poly-ovulatory species and their mechanisms are poorly understood. The goals of this work were to determine the existence and compare the character of mutual influence of cultured ovarian follicles from a mono-ovulatory species (cow) with established follicular dominance with those from a poly-ovulatory species (pig), in which interrelationship between follicles remain unknown, and to examine the role of ovarian cell proliferation, the insulin-like growth factor I (IGF-I)- oxytocin (OT) system, and steroid hormones in mediating interrelationships among ovarian follicles...
February 2, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28159593/short-term-oral-exposure-to-low-doses-of-nano-sized-tio2-and-potential-modulatory-effects-on-intestinal-cells
#9
Maria Grazia Ammendolia, Francesca Iosi, Francesca Maranghi, Roberta Tassinari, Francesco Cubadda, Federica Aureli, Andrea Raggi, Fabiana Superti, Alberto Mantovani, Barbara De Berardis
The present study investigated potential modulatory effects of low doses of nano-sized titanium dioxide (TiO2) on intestinal cells in vivo and in vitro. After short-term exposure to TiO2 nanoparticles in rats, histopathological analysis of intestinal tissues indicated a gender-specific effect with increased length of intestinal villi in male rats only. Moreover the intestinal tissue showed nanoparticle deposition as revealed by ICP-MS determination of titanium. Increased serum testosterone levels were also detected...
January 31, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28153033/klotho-an-anti-aging-gene-acts-as-a-tumor-suppressor-and-inhibitor-of-igf-1r-signaling-in-diffuse-large-b-cell-lymphoma
#10
Xiangxiang Zhou, Xiaosheng Fang, Yujie Jiang, Lingyun Geng, Xinyu Li, Ying Li, Kang Lu, Peipei Li, Xiao Lv, Xin Wang
BACKGROUND: Klotho, is a transmembrane protein, performs as a circulating hormone and upstream modulator of the insulin-like growth factor-1 receptor (IGF-1R), fibroblast growth factor (FGF), and Wnt signaling pathways. These pathways are involved in the development and progression of B cell lymphoma. We aimed to explore the expression pattern and functional mechanism of Klotho in diffuse large B cell lymphoma (DLBCL). METHODS: Immunohistochemistry (IHC) and western blotting were performed to detect the expression level of Klotho in DLBCL patients and cell lines...
February 2, 2017: Journal of Hematology & Oncology
https://www.readbyqxmd.com/read/28150161/diabetes-in-patients-with-acromegaly
#11
REVIEW
A M Hannon, C J Thompson, M Sherlock
Acromegaly is a clinical syndrome which results from growth hormone excess. Uncontrolled acromegaly is associated with cardiovascular mortality, due to an excess of risk factors including diabetes mellitus, hypertension and cardiomegaly. Diabetes mellitus is a frequent complication of acromegaly with a prevalence of 12-37%. This review will provide an overview of a number of aspects of diabetes mellitus and glucose intolerance in acromegaly including the following: 1. Epidemiology and pathophysiology of abnormalities of glucose homeostasis 2...
February 2017: Current Diabetes Reports
https://www.readbyqxmd.com/read/28135645/peripheral-insulin-like-growth-factor-1-in-bipolar-disorder
#12
Emily G da Silva, Bianca Pfaffenseller, Julio Walz, Laura Stertz, Gabriel Fries, Adriane R Rosa, Pedro V Magalhães
Bipolar disorder is a recurrent and highly incapacitating illness, related to inflammation and changes in the insulin-like growth factor 1 (IGF-1). The objective of this study was to evaluate serum levels of IGF-1 in bipolar disorder patients and its relation to inflammation. We included 31 patients with bipolar disorder and 33 healthy controls. Serum concentrations of IGF-1, growth hormone (GH), insulin and tumor necrosis factor α (TNF-α) were analyzed. The serum levels of IGF-1 seem to be increased in bipolar disorder patients (248...
January 23, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28125073/the-association-between-igf-1-levels-and-the-histologic-severity-of-nonalcoholic-fatty-liver-disease
#13
Laura E Dichtel, Kathleen E Corey, Joseph Misdraji, Miriam A Bredella, Melanie Schorr, Stephanie A Osganian, Brian J Young, Joshua C Sung, Karen K Miller
OBJECTIVES: The mechanisms responsible for the development of nonalcoholic fatty liver disease (NAFLD) and progression to nonalcoholic steatohepatitis (NASH) are incompletely understood. Growing evidence suggests that growth hormone (GH) and insulin-like growth factor-1 (IGF-1) may have roles in the development and progression of NAFLD. We hypothesized that lower serum IGF-1 levels would be associated with increased liver fat accumulation, inflammation, and fibrosis in a group of meticulously phenotyped obese subjects with liver biopsies...
January 26, 2017: Clinical and Translational Gastroenterology
https://www.readbyqxmd.com/read/28123470/levodopa-attenuates-cellular-apoptosis-in-steroid-associated-necrosis-of-the-femoral-head
#14
Hongbo Xi, Weijian Tao, Zhengguang Jian, Xuefeng Sun, Xiaohong Gong, Lixin Huang, Tianhua Dong
The present study aimed to investigate the effects of levodopa (LEV) on cellular apoptosis in a rabbit model of steroid-associated necrosis of the femoral head (SANFH). A total of 44 healthy adult Chinese rabbits were randomly divided into three groups: Group A (n=15), administered a combination of lipopolysaccharide and hormone to establish the SANFH animal model; group B (n=15), SANFH animal model as in group A orally administered LEV (0.4 g/kg/day) on the day of injection; and group C (n=14), the control group...
January 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28122522/acute-effects-of-physical-exercise-on-the-serum-insulin-like-growth-factor-system-in-women-with-fibromyalgia
#15
Kaisa Mannerkorpi, Kerstin Landin-Wilhelmsen, Anette Larsson, Åsa Cider, Olivia Arodell, Jan L Bjersing
BACKGROUND: Increased Serum insulin-like growth factor-1 (S-IGF-1) has been noted after physical activity in healthy subjects, while the acute release of S-IGF-1 in relation to exercise has not previously been studied in women with fibromyalgia (FM). S-IGF-1 and its binding protein (S-IGFBP-3) are mediated by growth hormone and have anabolic effects on the skeletal muscle. Aim of the study was to investigate acute release of IGF-1 after aerobic exercise in women with FM. METHODS: The acute effect of physical exercise on S-IGF-1 and S-IGFBP-3 were studied in 22 women with FM and in 27 healthy controls during moderate and high-intensity cycling (i...
January 25, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28122472/human-placental-growth-hormone-is-increased-in-maternal-serum-at-20-weeks-of-gestation-in-pregnancies-with-large-for-gestational-age-babies
#16
Shutan Liao, Mark H Vickers, Rennae S Taylor, Beatrix Jones, Mhoyra Fraser, Lesley M E McCowan, Philip N Baker, Jo K Perry
To investigate the relationship between maternal serum concentrations of placental growth hormone (GH-V), insulin-like growth factor (IGF)-1 and 2, IGF binding proteins (IGFBP)-1 and 3 and birth weight in appropriate-for-gestational-age (AGA), large-for-gestational-age (LGA) and small-for-gestational-age (SGA) cases in a nested case-control study. Maternal serum samples were selected from the Screening for Pregnancy Endpoints (SCOPE) biobank in Auckland, New Zealand. Serum hormone concentrations were determined by ELISA...
January 25, 2017: Growth Factors
https://www.readbyqxmd.com/read/28120715/hormonal-regulation-of-nitric-oxide-no-in-cardio-metabolic-diseases
#17
Emina Sudar-Milovanovic, Sonja Zafirovic, Aleksandra Jovanovic, Jovana Trebaljevac, Milan Obradovic, Desanka Cenic-Milosevic, Esma R Isenovic
BACKGROUND: Nitric oxide (NO) is a potential biochemical, cardio-metabolic risk marker. The production of NO is catalyzed by different isoforms of enzymes, NO synthases (NOS). An altered NO level is associated with obesity, insulin resistance (IR), diabetes and cardiovascular diseases (CVD). Activity of NOS and NO production are regulated by various hormones under physiological and pathophysiological condition. METHODS: Data used for this review were obtained by searching the electronic database [PUBMED/MEDLINE 1984 - May 2016]...
January 24, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28112773/combination-of-recreational-soccer-and-caloric-restricted-diet-reduces-markers-of-protein-catabolism-and-cardiovascular-risk-in-patients-with-type-2-diabetes
#18
M Vieira de Sousa, R Fukui, P Krustrup, S Dagogo-Jack, M E Rossi da Silva
BACKGROUND: Moderate calorie-restricted diets and exercise training prevent loss of lean mass and cardiovascular risk. Because adherence to routine exercise recommendation is generally poor, we utilized recreational soccer training as a novel therapeutic exercise intervention in type 2 diabetes (T2D) patients. OBJECTIVE: We compared the effects of acute and chronic soccer training plus calorie-restricted diet on protein catabolism and cardiovascular risk markers in T2D...
2017: Journal of Nutrition, Health & Aging
https://www.readbyqxmd.com/read/28112064/nutrition-infection-and-stunting-the-roles-of-deficiencies-of-individual-nutrients-and-foods-and-of-inflammation-as-determinants-of-reduced-linear-growth-of-children
#19
D Joe Millward
The regulation of linear growth by nutritional and inflammatory influences is examined in terms of growth-plate endochondral ossification, in order to better understand stunted growth in children. Linear growth is controlled by complex genetic, physiological, and nutrient-sensitive endocrine/paracrine/autocrine mediated molecular signalling mechanisms, possibly including sleep adequacy through its influence on growth hormone secretion. Inflammation, which accompanies most infections and environmental enteric dysfunction, inhibits endochondral ossification through the action of mediators including proinflammatory cytokines, the activin A-follistatin system, glucocorticoids and fibroblast growth factor 21 (FGF21)...
January 23, 2017: Nutrition Research Reviews
https://www.readbyqxmd.com/read/28105090/effects-of-recombinant-human-growth-hormone-in-the-treatment-of-dwarfism-and-relationship-between-igf-1-igfbp-3-and-thyroid-hormone
#20
Shanxiang Ren, Yuxiang Nie, Aihong Wang
The effects of recombinant human growth hormone (rhGH) in the treatment of dwarfism and the relationship between insulin-like growth factor (IGF)-1, IGF-binding protein (IGFBP)-3 and thyroid hormone were examined in the present study. For this purpose, 66 patients diagnosed with dwarfism were selected retrospectively, with 36 cases of growth hormone deficiency (GHD) and 30 cases of idiopathic short stature (ISS). The therapeutic dose of GHD 0.10 IU/kg·day and ISS 0.15 IU/kg·day were injected subcutaneously every night before sleep until adulthood...
December 2016: Experimental and Therapeutic Medicine
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