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https://www.readbyqxmd.com/read/28627605/mesenchymal-stem-cells-promote-endothelial-progenitor-cell-proliferation-by-secreting-insulin%C3%A2-like-growth-factor%C3%A2-1
#1
Jixue Hou, Xinyu Peng, Jing Wang, Hongwei Zhang, Jie Xia, Quanhu Ge, Xiaoyi Wang, Xueling Chen, Xiangwei Wu
Bone marrow mesenchymal stem cells (MSCs) and endothelial progenitor cells (EPCs) interact with each other. EPCs are able to promote the self‑renewal of MSCs as niche cells in murine bone marrow, and MSCs are able to promote EPC proliferation in vitro in a co‑culture system. It has previously been reported that MSCs can secrete insulin‑like growth factor‑1 (IGF‑1), which serves critical functions in EPC proliferation. However, the mechanism underlying the IGF‑1‑mediated proliferation of EPCs remains unclear...
June 9, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28594903/the-role-of-bone-marrow-mesenchymal-stromal-cell-derivatives-in-skin-wound-healing-in-diabetic-mice
#2
Tomas de Mayo, Paulette Conget, Silvia Becerra-Bayona, Claudia L Sossa, Virgilio Galvis, Martha L Arango-Rodríguez
Mesenchymal stromal cells (MSCs) have shown to be a promising tool in cell therapies to treat different conditions. Several pre-clinical and clinical studies have proved that the transplantation of MSCs improves wound healing. Here, we compare the beneficial effects of mouse bone marrow-derived allogeneic MSCs (allo-mBM-MSCs) and their acelullar derivatives (allo-acd-mMSCs) on skin wound healing in Non-Obese Diabetic (NOD) mice. One dose of allo-mBM-MSCs (1×106 cells) or one dose of allo-acd-mMSCs (1X) were intradermally injected around wounds in 8-10 week old female NOD mice...
2017: PloS One
https://www.readbyqxmd.com/read/28593921/hyperandrogenism-in-adolescent-girls-relationship-with-the-somatotrophic-axis
#3
María Isabel Hernandez, Patricia López, Ximena Gaete, Claudio Villarroel, Gabriel Cavada, Alejandra Avila, German Iñiguez, Fernando Cassorla
BACKGROUND: During puberty there is a physiologic increase in adrenal and ovarian androgens. It has been suggested that the somatotrophic axis may be related to the development of hyperandrogenism and anovulation in non-obese adult women with polycystic ovarian syndrome (PCOS). The objective of the study was to investigate whether ovarian androgen secretion in young postmenarchal girls is related to the function of their somatotropic axis. METHODS: This was a cross-sectional study of adolescent girls...
May 1, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28591390/long-term-follow-up-of-growth-hormone-secreting-pituitary-adenomas-submitted-to-endoscopic-endonasal-surgery
#4
Caroline Martins Dos Santos Leopoldo, Felippe Martins Dos Santos Leopoldo, Américo Rubens Leite Dos Santos, José Carlos Esteves Veiga, José Viana Lima, Nilza Maria Scalissi, Paulo Roberto Lazarini, Ricardo Landini Lutaif Dolci
Objective: The aim of this study was to evaluate the results of the endoscopic transsphenoidal technique for growth hormone (GH)-secreting adenomas. Methods: A retrospective analysis based on medical records of 23 acromegalic patients submitted to endoscopic transsphenoidal surgery. Biochemical control was defined as basal GH < 1ng/ml, nadir GH < 0.4ng/ml after glucose load and age-adjusted IGF-1 normal at the last follow-up. Results: The overall endocrinological remission rate was 39...
May 2017: Arquivos de Neuro-psiquiatria
https://www.readbyqxmd.com/read/28588001/successful-growth-hormone-therapy-in-cornelia-de-lange-syndrome
#5
Michael de Graaf, Sarina G Kant, Jan Maarten Wit, Egbert Johan Willem Redeker, Gijs Willem Eduard Santen, Annemieke Johanna Maria Henriëtta Verkerk, André Gerardus Uitterlinden, Monique Losekoot, Wilma Oostdijk
Cornelia de Lange Syndrome (CdLS) is a heterogeneous syndrome, both clinically and genetically, in its classical form characterised by distinctive facial features, intra-uterine growth retardation, short stature, developmental delay and anomalies in multiple organ systems. NIPBL, SMC1A, SMC3, RAD21 and HDAC8, all involved in the Cohesin pathway, have been identified to cause CdLS. Growth hormone (GH) secretion has been reported as normal, and to our knowledge there are no reports on the effect of recombinant human GH (r-hGH) treatment in CdLS patients...
June 7, 2017: Journal of Clinical Research in Pediatric Endocrinology
https://www.readbyqxmd.com/read/28587355/morphological-and-functional-changes-in-bone-marrow-mesenchymal-stem-cells-in-rats-with-heart-failure
#6
Xiuli Wang, Chunmei Li, Haibin Gong
The changes in bone marrow-derived mesenchymal stem cells (BMSCs), in terms of cell morphology and protein expression in rats with heart failure, were studied. Pressure overload chronic heart failure rat model was induced with partial constriction of the abdominal aorta. BMSCs from the model and the sham operation groups were isolated and cultured (cell density, 10(8) cells/l), and supernatant was collected after 72 h. Enzyme-linked immunosorbent assay was used to measure HGF, IGF-1, PDGF, SCF, FGF and VEGF levels in the supernatant...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28551754/neurotrophic-factors-in-mouse-models-of-autism-spectrum-disorder-focus-on-bdnf-and-igf-1
#7
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/28508612/the-longevity-hormone-klotho-is-a-new-player-in-the-interacion-of-the-growth-hormone-insulin-like-growth-factor-1-axis
#8
Tami Rubinek, Ido Wolf, Dalit Modan-Moses
Klotho was first discovered as an aging-suppressor gene. Mice that do not express klotho die prematurely with multiple symptoms of aging, several of which are also characteristic of decreased GH/IGF-1 axis activity. Klotho is highly expressed in the brain, the kidney, and parathyroid and pituitary glands, but can also serve as a circulating hormone by its shedding, forming soluble klotho (sKlotho) that can be detected in blood, cerebrospinal fluid and urine. Several lines of evidence suggest an association between klotho levels and activity of the GH/IHG-1 axis: The GH-secreting cells in the anterior pituitary of klotho-deficient mice are hypotrophic; klotho levels are altered in subjects with pathologies of the GH/IGF-1 axis; and accumulating data indicate that klotho is a direct regulator of GH secretion...
September 2016: Pediatric Endocrinology Reviews: PER
https://www.readbyqxmd.com/read/28500244/tamoxifen-reduces-hepatic-vldl-production-and-gh-secretion-in-women-a-possible-mechanism-for-steatosis-development
#9
Vita Birzniece, P Hugh R Barrett, Ken K Y Ho
CONTEXT: Growth hormone (GH) stimulates hepatic synthesis of very-low-density lipoproteins (VLDL), whereas hepatic steatosis develops as a result of GH deficiency. Steatosis is also a complication of tamoxifen treatment, the cause of which is not known. As tamoxifen inhibits the secretion and action of GH, we hypothesize that it induces steatosis by inhibiting hepatic VLDL export. AIM: To investigate whether tamoxifen reduces hepatic VLDL secretion. DESIGN: Eight healthy, normolipidemic women (age 64...
May 12, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28469926/primary-hypertrophic-osteoarthropathy-due-to-a-novel-slco2a1-mutation-masquerading-as-acromegaly
#10
Ruth Mangupli, Adrian F Daly, Elvia Cuauro, Paul Camperos, Jaime Krivoy, Albert Beckers
SUMMARY: A 20-year-old man with an 8-year history of progressive enlargement of his hands and feet, coarsening facial features, painful joints and thickened, oily skin was referred for investigation of acromegaly. On examination, the subject was of normal height and weight. He had markedly increased skin thickness around the forehead, eyelids and scalp with redundant skin folds. Bilateral painful knee swelling was accompanied by enlargement of the extremities, and his fingers were markedly clubbed...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28468523/non-essential-and-branched-chain-amino-acids-differentially-regulate-insulin-like-growth-factor-binding-protein-1-production-and-phosphorylation-in-hepg2-cells
#11
Kei Tanaka, Keiji Sakai, Miho Matsushima, Yukiko Matsuzawa, Tomoko Izawa, Yoichi Kobayashi, Mitsutoshi Iwashita
Deprivation of branched-chain amino acids (BCAAs) induces insulin-like growth factor binding protein-1 (IGFBP-1) production in HepG2 cells, while the role of non-essential amino acids (NEAAs) remains unknown. We investigated changes in IGFBP-1 production and phosphorylation induced by NEAAs and also examined its significance on IGF-I activity in HepG2 cells. We demonstrated that decreased BCAAs and increased NEAAs stimulated phosphorylated IGFBP-1 secretion. We also revealed that decreased BCAA-to-NEAA ratios enhanced phosphorylated IGFBP-1 secretion, while changes in the total amount of amino acids (AAs) had no effect...
February 2017: Growth Factors
https://www.readbyqxmd.com/read/28462439/ameliorative-effect-of-ve-igf-i-and-hcg-on-the-fluoride-induced-testosterone-release-suppression-in-mice-leydig-cells
#12
Yuxiang Yu, Yongli Han, Ruiyan Niu, Jundong Wang, Ram Kumar Manthari, Mohammad Mehdi Ommati, Zilong Sun
Excessive consumption of fluoride (F) through drinking, eating, and/or environmental contaminants induces chronic toxicity known as fluorosis. Our previous research has shown that fluorosis was associated with male reproductive disorders. The current study is designed to explain the protective effect of vitamin E (VE), insulin-like growth factor-I (IGF-I), and human chorionic gonadotropin (hCG) against natrium fluoride (NaF)-induced alterations in isolated Leydig cells (LCs). These NaF-induced alterations include decreased cell proliferation, steroidogenesis, and relative gene expression...
May 1, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28454879/expansion-of-cd26-positive-fibroblast-population-promotes-keloid-progression
#13
Yu Xin, Xiangsheng Wang, Ming Zhu, Miao Qu, Melia Bogari, Li Lin, Zin Mar Aung, Wei Chen, Xiaojun Chen, Gang Chai, Yan Zhang
BACKGROUND: Keloid is a skin fibrosis disease that characterised by invasive growth of fibroblasts and aberrant deposition of extracellular matrix. Studies indicated that keloid fibroblasts (KFs) is a class of 'activated' fibroblasts, which show accelerated proliferation and excessive extracellular matrix formation as compared with normal fibroblasts (NFs). However, the mechanism underlying keloid fibroblasts dysfunction is still unknown. OBJECTIVE: To verify CD26 expression difference between KFs and NFs, and investigate the function of CD26 positive fibroblasts in keloid progression...
April 25, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28453740/enhanced-coupling-within-gonadotropic-and-adrenocorticotropic-axes-by-moderate-exercise-in-healthy-men
#14
Ferdinand Roelfsema, Rebecca J Yang, Thomas P Olson, Michael J Joyner, Paul Y Takahashi, Johannes D Veldhuis
Context: Exercise elicits incompletely defined adaptations of metabolic and endocrine milieu, including the gonadotropic and the corticotropic axes. Objective: To quantify the impact of acute exercise on coordinate LH and testosterone and ACTH and cortisol secretion in healthy men in relation to age. Participantsand design: Prospectively randomized, within-subject cross-over, study in 23 men, aged 19-77 yr. Subjects underwent rest and 30 min of mixed exercise at 65% of maximal aerobic capacity with 10-min blood sampling between 0700 and 1300 h 2 wks apart...
April 27, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28449948/sunitinib-specifically-augments-glucose-induced-insulin-secretion
#15
Stefan Z Lutz, Axel Ullrich, Hans-Ulrich Häring, Susanne Ullrich, Felicia Gerst
The tyrosine kinase inhibitor sunitinib is used for the treatment of numerous cancers in humans. In diabetic patients, sunitinib lowers blood glucose levels and improves glycaemic control. This study aims to analyse whether sunitinib has specific and direct effects on insulin secreting β-cells. Regulation of insulin secretion, of cellular cAMP levels and activation of signalling pathways were examined upon exposure of rat insulinoma INS-1E cells to sunitinib under specific stimulatory and inhibitory conditions...
April 24, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28439054/-calcium-and-bone-metabolism-across-women-s-life-stages-the-effects-of-oral-contraceptives-low-dose-estrogen-progestin-on-bone-metabolism-bone-mass-and-geometry-in-adolescent-and-young-adult-women
#16
Hiroya Okano
Estrogens have a biphasic action on pubertal and/or adolescent skeletal growth. Low levels of estrogen may increase the periosteal expansion through the increase in the sensitivity of bone for mechanical stimuli and the secretion of IGF-1. On the other hand, high estrogen concentrations may inhibit periosteal bone formation. To use OC/LEP(oral contraceptive/low dose estrogen-progestin) during adolescence, meaning exposure to high levels of estrogen, may prevent the acquisition of physiologic peak of bone mass...
2017: Clinical Calcium
https://www.readbyqxmd.com/read/28425576/bone-marrow-adipose-and-lung-tissue-derived-murine-mesenchymal-stromal-cells-release-different-mediators-and-differentially-affect-airway-and-lung-parenchyma-in-experimental-asthma
#17
Soraia C Abreu, Mariana A Antunes, Debora G Xisto, Fernanda F Cruz, Vivian C Branco, Elga Bandeira, Jamil Zola Kitoko, Almair F de Araújo, Ludmilla Dellatorre-Texeira, Priscilla C Olsen, Daniel J Weiss, Bruno L Diaz, Marcelo M Morales, Patricia R M Rocco
Mesenchymal stromal cells (MSCs) from different sources have differential effects on lung injury. To compare the effects of murine MSCs from bone marrow (BM), adipose tissue (AD), and lung tissue (LUNG) on inflammatory and remodeling processes in experimental allergic asthma, female C57BL/6 mice were sensitized and challenged with ovalbumin (OVA) or saline (C). Twenty-four hours after the last challenge, mice received either saline (50 µl, SAL), BM-MSCs, AD-MSCs, or LUNG-MSCs (10(5) cells per mouse in 50 µl total volume) intratracheally...
June 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28424159/prolonged-elimination-of-negative-feedback-control-mechanisms-along-the-insulin-signalling-pathway-impairs-%C3%AE-cell-function-in-vivo
#18
Roi Isaac, Yaron Vinik, Sigalit Boura-Halfon, Lydia Farack, Sarina Streim, Eytan Elhanany, Zvi Kam, Yehiel Zick
Cellular stress and pro-inflammatory cytokines induce phosphorylation of insulin receptor substrate (IRS) proteins at Ser sites that inhibit insulin and IGF-1 signalling. We therefore examined the effects of mutation of five 'inhibitory' Ser phosphorylation sites on IRS2 function in transgenic mice that overexpress, selectively in pancreatic β cells, either wild-type (WT) or a mutated IRS2 protein (IRS2(5A)). Islets size, number, and mRNA levels of catalase and superoxide dismutase, were increased, while those of nitric oxide synthase were decreased in 7-10 weeks old IRS2(5A)-β mice compared to IRS2(WT)-β mice...
April 19, 2017: Diabetes
https://www.readbyqxmd.com/read/28419894/muscle-cell-communication-in-development-and-repair
#19
REVIEW
Alexis R Demonbreun, Elizabeth M McNally
Under basal conditions, postnatal skeletal muscle displays little cell turnover. With injury, muscle initiates a rapid repair response to reseal damaged membrane, reactivating many developmental pathways to facilitate muscle regeneration and prevent tissue loss. Muscle precursor cells become activated accompanied by differentiation and fusion during both muscle growth and regeneration; inter-cellular communication is required for successful completion of these processes. Cellular communication is mediated by lipids, fusogenic membrane proteins, and exosomes...
April 15, 2017: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/28396686/expression-of-somatostatin-receptor-2-in-somatotropinoma-correlated-with-the-short-term-efficacy-of-somatostatin-analogues
#20
Wenjuan Liu, Lina Xie, Min He, Ming Shen, Jingjing Zhu, Yeping Yang, Meng Wang, Ji Hu, Hongying Ye, Yiming Li, Yao Zhao, Zhaoyun Zhang
The expression of somatostatin receptor subtypes (SSTRs) in pituitary growth hormone- (GH-) secreting adenomas may predict the response to somatostatin analogues (SSA). Our aim was to evaluate the value of the immunohistochemical (IHC) scores of 2 subtypes, SSTR2 and SSTR5, in predicting the short-term efficacy of SSA therapy in patients with active acromegaly. Ninety-three newly diagnosed acromegalic patients were included in our study. These patients were categorized into either a SSA-pretreated group (SA, n = 63) or a direct-surgery group (DS, n = 30), depending on whether or not presurgical SSA treatment was received...
2017: International Journal of Endocrinology
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