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https://www.readbyqxmd.com/read/28551807/prohibitin-signaling-at-the-kidney-filtration-barrier
#1
Christina Ising, Paul T Brinkkoetter
The kidney filtration barrier consists of three well-defined anatomic layers comprising a fenestrated endothelium, the glomerular basement membrane (GBM) and glomerular epithelial cells, the podocytes. Podocytes are post-mitotic and terminally differentiated cells with primary and secondary processes. The latter are connected by a unique cell-cell contact, the slit diaphragm. Podocytes maintain the GBM and seal the kidney filtration barrier to prevent the onset of proteinuria. Loss of prohibitin-1/2 (PHB1/2) in podocytes results not only in a disturbed mitochondrial structure but also in an increased insulin/IGF-1 signaling leading to mTOR activation and a detrimental metabolic switch...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28551754/neurotrophic-factors-in-mouse-models-of-autism-spectrum-disorder-focus-on-bdnf-and-igf-1
#2
Dominik Reim, Michael J Schmeisser
Neurotrophic factors are secreted proteins promoting the development and maintaining the function of neural circuits. Studies in human individuals with autism spectrum disorder (ASD) and corresponding animal models have implicated that alterations of neurotrophic factor levels and the associated signalling pathways might contribute to the underlying pathophysiology. As most of this work has investigated the role of brain-derived neurotrophic factor (BDNF) and insulin-like growth factor 1 (IGF-1) in ASD formation, we focus on these two molecules in this review...
2017: Advances in Anatomy, Embryology, and Cell Biology
https://www.readbyqxmd.com/read/28551677/serum-levels-of-igf-1-and-igfbp-3-in-relation-to-clinical-and-pathobiological-aspects-of-head-and-neck-squamous-cell-carcinomas
#3
David Kalfert, Marie Ludvikova, Ondrej Topolcan, Petr Celakovsky, Radek Kucera, Jindra Windrichova, Jaroslav Ludvik, Katerina Skalova, Vlastimil Kulda, Martin Pesta, Jan Plzak
BACKGROUND/AIM: Head and neck squamous cell carcinoma (HNSCC) includes tumors of various anatomical sites sharing multifactorial etiopathogenesis and generally dismal response to conventional treatment. The objective of this study was to determine the clinical significance of serum levels of insulin-like growth factor-1 (IGF-1) and insulin-like growth factor-binding protein-3 (IGFBP-3) in HNSCC. PATIENTS AND METHODS: A total of 46 patients, with histologically-confirmed diagnosis of HNSCC (21 oropharyngeal, 21 laryngeal, and 4 hypopharyngeal cancers) were enrolled in this study...
June 2017: Anticancer Research
https://www.readbyqxmd.com/read/28551627/the-cooh-terminus-of-the-igf-1ec-isoform-enhances-the-proliferation-and-migration-of-human-mcf-7-breast-cancer-cells
#4
Panagiotis F Christopoulos, Efstathia Papageorgiou, Constantina Petraki, Michael Koutsilieris
BACKGROUND/AIM: The insulin-like growth factor-1 (IGF-1) signaling is well implicated in cancer biology, however the potential roles of the distinct IGF-1 isoforms in human malignancies are largely unknown. Recently, the carboxyl-terminal of the IGF-1Ec variant (hEc; 24aa) has been associated with osteosarcoma and prostate cancer. Herein, we investigated the potential role of hEc in breast cancer. MATERIALS AND METHODS: Synthetic hEc peptide was administrated to MCF-7 and MDA-MB-231 breast cancer cells...
June 2017: Anticancer Research
https://www.readbyqxmd.com/read/28545881/high-fat-diet-and-saturated-fatty-acid-palmitate-inhibits-igf-1-function-in-chondrocytes
#5
Sumaiya A Nazli, Richard F Loeser, Susan Chubinskaya, Jeffrey S Willey, Raghunatha R Yammani
INTRODUCTION: Insulin-like growth factor-1 (IGF-1) promotes matrix synthesis and cell survival in cartilage. Chondrocytes from aged and osteoarthritic cartilage have a reduced response to IGF-1. The purpose of this study was to determine the effect of free fatty acids present in a high-fat diet on IGF-1 function in cartilage and the role of ER stress. METHODS: C57BL/6 male mice were maintained on either a high-fat (60% kcal from fat) or a low-fat (10% kcal from fat) diet for 4 months...
May 22, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28545426/insulin-like-growth-factor-1-receptor-affects-the-survival-of-primary-prostate-cancer-patients-depending-on-tmprss2-erg-status
#6
Caterina Mancarella, Irene Casanova-Salas, Ana Calatrava, Maria García-Flores, Cecilia Garofalo, Andrea Grilli, José Rubio-Briones, Katia Scotlandi, José Antonio López-Guerrero
BACKGROUND: Prostate cancer (PCa) is characterized by clinical and biological heterogeneity and has differential outcomes and mortality rates. Therefore, it is necessary to identify molecular alterations to define new therapeutic strategies based on the risk of progression. In this study, the prognostic relevance of the insulin-like growth factor (IGF) system was examined in molecular subtypes defined by TMPRSS2-ERG (T2E) gene fusion within a series of patients with primary localized PCa...
May 25, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28544544/insulin-like-growth-factor-1-signaling-is-responsible-for-cathepsin-g-induced-aggregation-of-breast-cancer-mcf-7-cells
#7
Riyo Morimoto-Kamata, Satoru Yui
Cathepsin G (CG), a neutrophil serine protease, induces cell migration and multicellular aggregation of human breast cancer MCF-7 cells in a process that is dependent on E-cadherin and CG enzymatic activity. While these tumor cell aggregates can cause tumor emboli that could represent intravascular growth and extravasation into the surrounding tissues, resulting in metastasis, the molecular mechanism underlying this process remains poorly characterized. In this study, we aimed to identify the signaling pathway that is triggered during CG-mediated stimulation of cell aggregation...
May 24, 2017: Cancer Science
https://www.readbyqxmd.com/read/28544365/anti-aging-drugs-reduce-hypothalamic-inflammation-in-a-sex-specific-manner
#8
Marianna Sadagurski, Gillian Cady, Richard A Miller
Aging leads to hypothalamic inflammation, but does so more slowly in mice whose lifespan has been extended by mutations that affect GH/IGF-1 signals. Early-life exposure to GH by injection, or to nutrient restriction in the first 3 weeks of life, also modulate both lifespan and the pace of hypothalamic inflammation. Three drugs extend lifespan of UM-HET3 mice in a sex-specific way: acarbose (ACA), 17-α-estradiol (17αE2), and nordihydroguaiaretic acid (NDGA), with more dramatic longevity increases in males in each case...
May 20, 2017: Aging Cell
https://www.readbyqxmd.com/read/28541289/mir-29b-contributes-to-multiple-types-of-muscle-atrophy
#9
Jin Li, Mun Chun Chan, Yan Yu, Yihua Bei, Ping Chen, Qiulian Zhou, Liming Cheng, Lei Chen, Olivia Ziegler, Glenn C Rowe, Saumya Das, Junjie Xiao
A number of microRNAs (miRNAs, miRs) have been shown to play a role in skeletal muscle atrophy, but their role is not completely understood. Here we show that miR-29b promotes skeletal muscle atrophy in response to different atrophic stimuli in cells and in mouse models. miR-29b promotes atrophy of myotubes differentiated from C2C12 or primary myoblasts, and conversely, its inhibition attenuates atrophy induced by dexamethasone (Dex), TNF-α and H2O2 treatment. Targeting of IGF-1 and PI3K(p85α) by miR-29b is required for induction of muscle atrophy...
May 25, 2017: Nature Communications
https://www.readbyqxmd.com/read/28540255/comparison-and-validation-of-elisa-assays-for-plasma-insulin-like-growth-factor-1-in-the-horse
#10
Courtnay L Baskerville, Nicholas J Bamford, Patricia A Harris, Simon R Bailey
Insulin-like growth factor-1 (IGF-1) plays several important physiological roles, and IGF-related pathways have been implicated in developmental osteochondral disease and endocrinopathic laminitis. This factor is also a downstream marker of growth hormone activity and its peptide mimetics. Unfortunately, previously used assays for measuring equine IGF-1 (radioimmunoassays and ELISAs) are no longer commercially available, and many of the kits on the market give poor results when used on horse samples. The aim of the present study was to compare three different ELISA assays (two human and one horse-specific)...
2017: Open veterinary journal
https://www.readbyqxmd.com/read/28538694/essential-role-of-growth-hormone-and-igf-1-in-therapeutic-effect-of-ghrelin-in-the-course-of-acetic-acid-induced-colitis
#11
Piotr Ceranowicz, Zygmunt Warzecha, Jakub Cieszkowski, Dagmara Ceranowicz, Beata Kuśnierz-Cabala, Joanna Bonior, Jolanta Jaworek, Tadeusz Ambroży, Krzysztof Gil, Rafał Olszanecki, Małgorzata Pihut, Artur Dembiński
Previous studies have shown that ghrelin exhibits a protective and therapeutic effect in the gut. The aim of the present study was to examine whether administration of ghrelin affects the course of acetic acid-induced colitis and to determine what is the role of growth hormone (GH) and insulin-like growth factor-1 (IGF-1) in this effect. In sham-operated or hypophysectomized male Wistar rats, colitis was induced by enema with 1 mL of 3% solution of acetic acid. Saline or ghrelin (given at the dose of 8 nmol/kg/dose) was administered intraperitoneally twice a day...
May 24, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28537499/vitamin-d-improves-the-content-of-tgf-%C3%AE-and-igf-1-in-intervertebral-disc-of-diabetic-rats
#12
Ji-Long An, Wei Zhang, Jian Zhang, Li-Chao Lian, Yong Shen, Wen-Yuan Ding
OBJECTIVE: The contents of transforming growth factor-β and insulin-like growth factor-1 in disc of diabetic rats were measured at three different periods after injected with 1,25-Dihydroxyvitamin D3, and compared with that in normal rats. The significance of content changes was also discussed. METHODS: Fourty-five Sprague-Dawley (SD) rats were divided into three groups, namely the experimental group (STZ+calcitriol), control group (STZ+citrate buffer), and normal group (citrate buffer)...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28537443/pregnancy-associated-plasma-protein-a-papp-a-and-the-proform-of-the-eosinophil-major-basic-protein-prombp-are-associated-with-increased-risk-of-death-in-heart-failure-patients
#13
Maja Dembic, Paula L Hedley, Christian Torp-Pedersen, Lars Køber, Michael Christiansen
Risk stratification and patient management in heart failure (HF) is difficult due to the unpredictable progression of the disease, necessitating the development of reliable diagnostic biomarkers to facilitate decision-making in clinical practice. Pregnancy-associated plasma protein-A (PAPP-A) is a marker of arteriosclerotic heart disease. PAPP-A is a serum protease, which is involved in the insulin-like growth factor 1 (IGF-1) axis where it is inhibited by the proform of the eosinophil major basic protein (proMBP)...
May 24, 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/28537332/comparison-of-intermittent-fasting-versus-caloric-restriction-in-obese-subjects-a-two-year-follow-up
#14
F B Aksungar, M Sarıkaya, A Coskun, M Serteser, I Unsal
OBJECTIVE: Caloric restriction (CR) is proven to be effective in increasing life span and it is well known that, nutritional habits, sleeping pattern and meal frequency have profound effects on human health. In Ramadan some Muslims fast during the day-light hours for a month, providing us a unique model of intermittent fasting (IF) in humans. In the present study, we have investigated the effects of IF versus CR on the same non-diabetic obese subjects who were followed for two years according to the growth hormone (GH)/Insulin like growth factor (IGF)-1 axis and insulin resistance...
2017: Journal of Nutrition, Health & Aging
https://www.readbyqxmd.com/read/28534942/gene-expression-analysis-of-growth-factor-receptors-in-human-chondrocytes-in-monolayer-and-3d-pellet-cultures
#15
Anika Witt, Achim Salamon, Diana Boy, Doris Hansmann, Andreas Büttner, Andreas Wree, Rainer Bader, Anika Jonitz-Heincke
The main goal of cartilage repair is to create functional tissue by enhancing the in vitro conditions to more physiological in vivo conditions. Chondrogenic growth factors play an important role in influencing cartilage homeostasis. Insulin‑like growth factor (IGF)‑1 and transforming growth factor (TGF)‑β1 affect the expression of collagen type II (Col2) and glycosaminoglycans (GAGs) and, therefore, the targeted use of growth factors could make chondrogenic redifferentiation more efficient. In the present study, human chondrocytes were postmortally isolated from healthy articular cartilage and cultivated as monolayer or 3D pellet cultures either under normoxia or hypoxia and stimulated with IGF‑1 and/or TGF‑β1 to compare the impact of the different growth factors...
May 18, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28532840/effect-of-breed-plane-of-nutrition-and-age-on-growth-scrotal-development-metabolite-concentrations-and-on-systemic-gonadotropin-and-testosterone-concentrations-following-a-gnrh-challenge-in-young-dairy-bulls
#16
C J Byrne, S Fair, A M English, C Urh, H Sauerwein, M A Crowe, P Lonergan, D A Kenny
The onset of puberty in the bull is regulated by the timing of early GnRH pulsatility release from the hypothalamus, which has been demonstrated to be affected by plane of nutrition during calf-hood. The aim of this study was to determine the effect of plane of nutrition on growth rate, scrotal development, metabolite concentrations and exogenous gonadotrophin (GnRH) induced release of luteinizing hormone (LH), follicle stimulating hormone (FSH) and testosterone (TT) in pre-pubertal bulls of two contrasting dairy breeds...
July 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28529639/overexpression-of-insulin-like-growth-factor-1-enhanced-the-osteogenic-capability-of-aging-bone-marrow-mesenchymal-stem-cells
#17
Ching-Yun Chen, Kuo-Yun Tseng, Yen-Liang Lai, Yo-Shen Chen, Feng-Huei Lin, Shankung Lin
Many studies have indicated that loss of the osteoblastogenic potential in bone marrow mesenchymal stem cells (bmMSCs) is the major component in the etiology of the aging-related bone deficit. But how the bmMSCs lose osteogenic capability in aging is unclear. Using 2-dimentional cultures, we examined the dose response of human bmMSCs, isolated from adult and aged donors, to exogenous insulin-like growth factor 1 (IGF-1), a growth factor regulating bone formation. The data showed that the mitogenic activity and the osteoblastogenic potential of bmMSCs in response to IGF-1 were impaired with aging, whereas higher doses of IGF-1 increased the proliferation rate and osteogenic potential of aging bmMSCs...
2017: Theranostics
https://www.readbyqxmd.com/read/28529141/z-505-hydrochloride-an-orally-active-ghrelin-agonist-attenuates-the-progression-of-cancer-cachexia-via-anabolic-hormones-in-colon-26-tumor-bearing-mice
#18
Makoto Yoshimura, Yoshihiro Shiomi, Yuta Ohira, Mineo Takei, Takao Tanaka
Cancer cachexia is a progressive wasting syndrome characterized by anorexia and weight loss, specifically muscle wasting and fat depletion. There is no therapeutic agent for treatment of this syndrome. We investigated the anti-cachexia effects of Z-505 hydrochloride (Z-505), a new oral growth hormone secretagogue receptor 1a (GHSR1a) agonist, using a mouse model of cancer cachexia. We performed a calcium flux assay in Chinese hamster ovary (CHO-K1) cells stably expressing human GHSR1a to quantify the agonistic activity of Z-505...
May 18, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28528692/insulin-like-growth-factor-igf-axis-in-cancerogenesis
#19
REVIEW
Aldona Kasprzak, Wojciech Kwasniewski, Agnieszka Adamek, Anna Gozdzicka-Jozefiak
Determination of the role of insulin-like growth factor (IGF) family components in carcinogenesis of several human tumors is based on numerous epidemiological and pre-clinical studies, experiments in vivo and in vitro and on attempts at application of drugs affecting the IGF axis. Investigative hypotheses in original studies were based on biological functions manifested by the entire family of IGF (ligands, receptors, linking proteins, adaptor molecules). In the context of carcinogenesis the most important functions of IGF family involve intensification of proliferation and inhibition of cell apoptosis and effect on cell transformation through synthesis of several regulatory proteins...
April 2017: Mutation Research
https://www.readbyqxmd.com/read/28526658/nonclinical-pharmacology-and-toxicology-of-the-first-biosimilar-insulin-glargine-drug-product-basaglar-%C3%A2-abasaglar-%C3%A2-approved-in-the-european-union
#20
Richard A Byrd, Rebecca A Owens, Jamie L Blackbourne, David E Coutant, Mark W Farmen, M Dodson Michael, Julie S Moyers, A Eric Schultze, Michael K Sievert, Niraj K Tripathi, John L Vahle
Basaglar(®)/Abasaglar(®) (Lilly insulin glargine [LY IGlar]) is a long-acting human insulin analogue drug product granted marketing authorisation as a biosimilar to Lantus(®) (Sanofi insulin glargine [SA IGlar]) by the European Medicines Agency. We assessed the similarity of LY IGlar to the reference drug product, European Union-sourced SA IGlar (EU-SA IGlar), using nonclinical in vitro and in vivo studies. No biologically relevant differences were observed for receptor binding affinity at either the insulin or insulin-like growth factor-1 (IGF-1) receptors, or in assays of functional or de novo lipogenic activity...
May 16, 2017: Regulatory Toxicology and Pharmacology: RTP
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