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insulin-like growth factor

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https://www.readbyqxmd.com/read/27933679/supplementation-with-nutrients-modulating-insulin-like-growth-factor-1-negatively-correlated-with-changes-in-the-levels-of-pro-inflammatory-cytokines-in-community-dwelling-elderly-people-at-risk-of-undernutrition
#1
M Kim, M Kim, Y J Lee, H J Song, J K Shim, D H Chang, W K Yu, S-H Lee, J H Lee
BACKGROUND: Suboptimal nutrition accompanied by chronic low-grade increases in circulating cytokine levels is more common in elderly people. We explored the improvement in nutritional status, especially in the level of insulin-like growth factor-1 (IGF-1) and its relationship with changes in circulating cytokine levels, after providing extra protein and energy content to community-dwelling older adults at risk of undernutrition. METHODS: Sixty nondiabetic subjects, aged ≥65 years and living independently in a community for elderly people, with a serum pre-albumin level ≤30 mg dL(-1) and a body mass index <25 kg m(-2) , were recruited...
December 9, 2016: Journal of Human Nutrition and Dietetics: the Official Journal of the British Dietetic Association
https://www.readbyqxmd.com/read/27933171/active-postoperative-acromegaly-sustained-remission-after-discontinuation-of-somatostatin-analogues
#2
Cristina Alvarez-Escola, Jersy Cardenas-Salas
: In patients with active acromegaly after pituitary surgery, somatostatin analogues are effective in controlling the disease and can even be curative in some cases. After treatment discontinuation, the likelihood of disease recurrence is high. However, a small subset of patients remains symptom-free after discontinuation, with normalized growth hormone (GH) and insulin-like growth factor (IGF1) levels. The characteristics of patients most likely to achieve sustained remission after treatment discontinuation are not well understood, although limited evidence suggests that sustained remission is more likely in patients with lower GH and IGF1 levels before treatment withdrawal, in those who respond well to low-dose treatment, in those without evidence of adenoma on an MRI scan and/or in patients who receive long-term treatment...
2016: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/27932998/gene-expression-dynamics-in-major-endocrine-regulatory-pathways-along-the-transition-from-solitary-to-social-life-in-a-bumblebee-bombus-terrestris
#3
Pavel Jedlička, Ulrich R Ernst, Alena Votavová, Robert Hanus, Irena Valterová
Understanding the social evolution leading to insect eusociality requires, among other, a detailed insight into endocrine regulatory mechanisms that have been co-opted from solitary ancestors to play new roles in the complex life histories of eusocial species. Bumblebees represent well-suited models of a relatively primitive social organization standing on the mid-way to highly advanced eusociality and their queens undergo both, a solitary and a social phase, separated by winter diapause. In the present paper, we characterize the gene expression levels of major endocrine regulatory pathways across tissues, sexes, and life-stages of the buff-tailed bumblebee, Bombus terrestris, with special emphasis on critical stages of the queen's transition from solitary to social life...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27932529/effectiveness-of-first-line-pegvisomant-monotherapy-in-acromegaly-an-acrostudy-analysis
#4
Nicholas A Tritos, Philippe Chanson, Camilo Jimenez, Donna King, Peter J Jönsson, Anne Klibanski, Beverly M K Biller
OBJECTIVE: To examine the effectiveness and safety of primary pegvisomant monotherapy. DESIGN: Retrospective analysis of data extracted from ACROSTUDY (global observational outcomes study of patients with acromegaly treated with pegvisomant). METHODS: The earliest time to insulin-like growth factor 1 (IGF-1) normalization on pegvisomant monotherapy was determined. Both the proportion of patients who achieved IGF-1 normalization and the time to IGF-1 normalization on pegvisomant monotherapy were assessed...
February 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/27932411/mod-4023-a-long-acting-carboxy-terminal-peptide-ctp-modified-human-growth-hormone-results-of-a-phase-2-study-in-growth-hormone-deficient-adults
#5
Christian J Strasburger, Peter Vanuga, Juraj Payer, Marija Pfeifer, Vera Popović, Laszlo Bajnok, Miklós I Góth, Věra Olšovská, Ľudmila Trejbalová, Janos Vadasz, Eyal Fima, Ronit Koren, Leanne Amitzi, Martin Bidlingmaier, Gili Hart, Beverly M K Biller
OBJECTIVE: Growth hormone (GH) replacement therapy currently requires daily injections, which may cause distress and low compliance. C-terminal peptide (CTP)-modified growth hormone (MOD-4023) is being developed as a once-weekly dosing regimen in patients with GH deficiency (GHD). This study's objective is to evaluate the safety, pharmacokinetics (PK), pharmacodynamics (PD) and efficacy of MOD-4023 administered once weekly in GHD adults. DESIGN: 54 adults with GHD currently treated with daily GH were normalized and randomized into 4 weekly dosing cohorts of MOD-4023 at 18...
December 8, 2016: European Journal of Endocrinology
https://www.readbyqxmd.com/read/27931832/the-role-of-the-igf-1-ec-in-myoskeletal-system-and-osteosarcoma-pathophysiology
#6
REVIEW
Nikolaos Armakolas, Athanasios Armakolas, Athanasios Antonopoulos, Andreas Dimakakos, Martha Stathaki, Michael Koutsilieris
Growth hormone (GH) regulated mainly liver-produced insulin-like growth factor 1 (IGF-1) is a key molecule in embryonic & post embryonic development that is also involved in cancer biology. Herein we review new insights of the role of igf-1 gene products and of the IGF-1Ec isoform in muscle and bone development/repair and its role in osteosarcoma pathophysiology, underlying the possible role of the Ec peptide as a future therapeutic target.
December 2016: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/27930694/influence-of-fasting-status-and-sample-preparation-on-metabolic-biomarker-measurements-in-postmenopausal-women
#7
Neil Murphy, Roni T Falk, Diana B Messinger, Michael Pollak, Xiaonan Xue, Juan Lin, Robin Sgueglia, Howard D Strickler, Mia M Gaudet, Marc J Gunter
BACKGROUND: Epidemiologic data linking metabolic markers-such as insulin, insulin-like growth factors (IGFs)-and adipose tissue-derived factors with cancer are inconsistent. Between-study differences in blood collection protocols, in particular participant's fasting status, may influence measurements. METHODS: We investigated the impact of fasting status and blood sample processing time on components of the insulin/IGF axis and in adipokines in a controlled feeding study of 45 healthy postmenopausal-women aged 50-75 years...
2016: PloS One
https://www.readbyqxmd.com/read/27930579/molecular-characteristics-of-colorectal-serrated-polyps-and-hyperplastic-polyps-a-strobe-compliant-article
#8
Otgontuya Sambuudash, Hee Man Kim, Hannah Jo, Hyun Sik Kim, Kyong Joo Lee, Hong Jun Park, Jae Woo Kim, Mee Yon Cho, Hyun-Soo Kim
The serrated neoplasia pathway of colorectal carcinogenesis is characterized by BRAF mutation and aberrant DNA methylation, which have not been reported on Korean patients. The aim of this study was to investigate BRAF mutation and DNA methylation in colorectal serrated polyps and the right colon.Between 2005 and 2013, 146 colon polyps (47 tubular adenomas [TAs], 53 traditional serrated adenomas [TSAs], 17 sessile serrated adenomas/polyps [SSAs], and 29 hyperplastic polyps in the proximal colon [PHPs]) were collected from patients...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27928979/feed-restriction-and-insulin-like-growth-factor-i-igf-i-affect-the-oocyte-maturation-in-matrinx%C3%A3-brycon-amazonicus
#9
Luís Henrique Montrezor, Elisabeth Criscuolo Urbinati
The feeding and nutrition of breeders are crucial aspects in the reproductive process. During the maturation period, metabolic changes occur aiming at mobilizing energy for growth and follicular development. The involvement of IGF-1 in metabolic and reproductive events is important. The aim of this work was to evaluate if alternate feed restriction and re-feeding have permissive effects on in vitro actions of IGF-1 on oocytes development of matrinxã. In vivo experiments were performed during vitellogenesis period...
December 8, 2016: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/27928806/-molecular-mechanism-of-gastrointestinal-stromal-tumors-and-progress-in-drug-research
#10
Jian Li
The functional mutation of c-kit and platelet-derived growth factor receptor α (PDGFRA) which encode proto-oncogene receptor tyrosine kinase are the crucial pathogeneses of gastrointestinal stromal tumors(GISTs). 80%-85% c-kit gene mutation including exon 11,exon 9,exon 13,exon 17 and 5%-10% PDGFRA gene mutation such as exon 18, exon 12 are examined in GISTs. Neither of c-kit or PDGFRA gene mutation are called wide type GISTs. The pathogeneses of wild type GISTs are not clear. The deficiency of succinate dehydrogenase B(SDHB)-related insulin-like growth factor 1(IGF-1R) activation, BRAF gene mutation and neurofibromatosis type 1 may be related to progression of wild type GISTs...
November 25, 2016: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/27928147/mechanistic-study-of-the-inhibitory-effect-of-kaempferol-on-uterine-fibroids-in-vitro
#11
Yanxia Li, Zhaoxia Ding, Chuanzhong Wu
BACKGROUND This study examined the effect of kaempferol on uterine fibroids in vitro and the underlying mechanism, and investigated the potential of kaempferol as a clinical drug for the treatment of uterine fibroids. MATERIAL AND METHODS Uterine fibroid tissue and surrounding smooth muscle tissue were collected for primary culture. Different concentrations of kaempferol (12 μM, 24 μM, and 48 μM) were used to treat the cells for 24, 48, and 72 hours. Ethanol was used in the control group. A CCK-8 colorimetric assay was used to detect cell proliferation...
December 8, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27925358/castration-induced-changes-in-the-expression-profiles-and-promoter-methylation-of-the-ghr-gene-in-huainan-male-pigs
#12
Jing Wang, Junfeng Chen, Jiaqing Zhang, Binwen Gao, Xianxiao Bai, Yali Lan, Ping Lin, Hongxia Guo, Yuan Gao, Baosong Xing
Castration plays a regulatory role in growth and carcass traits, particularly in fat deposition, but its molecular mechanisms are still not clear. The present study showed that castration significantly reduced the serum growth hormone and the responses of the growth hormone receptor (GHR), insulin-like growth factor 1 (IGF-I), IGF-IR and peroxisome proliferator-activated receptor gamma (PPARγ) to castration were similar in different adipose tissues. However, the GHR expression trends were opposite between the liver and the adipose tissues; bisulfite sequencing PCR (BSP) showed that its methylation in these two tissues was different...
December 7, 2016: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/27925205/generation-of-insulin-producing-cells-from-human-induced-pluripotent-stem-cells-using-a-stepwise-differentiation-protocol-optimized-with-platelet-rich-plasma
#13
Seyed Ehsan Enderami, Yousef Mortazavi, Masoud Soleimani, Samad Nadri, Alireza Biglari, Reyhaneh Nassiri Mansour
Studies on patient-specific human-induced pluripotent stem cells (hiPSCs) as well as a series of autologous growth factors presumably will reveal their many benefits for cell base replacement therapy in type 1 diabetes mellitus (TIDM) patients in the future. For this purpose, we established a multistep protocol by adding platelet-rich plasma (PRP) that induce the hiPSCs into insulin-producing cells (IPCs). We present here a differentiation protocol consisting of five stages in two groups including protocol with PRP and without PRP...
December 7, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27925035/insulin-like-growth-factor-1-gene-polymorphism-and-breast-cancer-risk
#14
Danylo R Costa-Silva, Maria DA Conceição Barros-Oliveira, Rafael S Borges, Cléciton B Tavares, Umbelina S Borges, Francisco A Alves-Ribeiro, Vladimir C Silva, Benedito B DA Silva
Insulin-like Growth Factor-1 (IGF-1) gene polymorphism has been associated with an increased risk for breast cancer. IGF-1 is a key regulator of proliferation, cell differentiation and apoptosis. It has important mitogenic and anti-apoptotic activities in normal cells and in breast cancer cells, acting synergistically with estrogen to increase neoplastic cell proliferation. This review aims to present the recent finds of IGF-1 gene polymorphism and its relationship with the risk of breast cancer through following the polymorphic dinucleotide repeat cytosine-adenine (CA) and single nucleotide polymorphisms (SNPs) by searching in the PubMed database publications focused studies published from 2010 to 2015 related to IGF-1 gene polymorphism and breast cancer risk...
December 1, 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27923977/absence-of-renal-enlargement-in-fructose-fed-proximal-tubule-select-insulin-receptor-ir-insulin-like-growth-factor-receptor-igf1r-double-knockout-mice
#15
Lijun Li, Marcus Byrd, Kwame Doh, Patrice D Dixon, Hwal Lee, Swasti Tiwari, Carolyn M Ecelbarger
The major site of fructose metabolism in the kidney is the proximal tubule (PT). To test whether insulin and/or IGF1 signaling in the PT is involved in renal structural/functional responses to dietary fructose, we bred mice with dual knockout (KO) of the insulin receptor (IR) and the IGF1 receptor (IGF1R) in PT by Cre-lox recombination, using a γ-glutamyl transferase promoter. KO mice had slightly (~10%) reduced body and kidney weights, as well as, a reduction in mean protein-to-DNA ratio in kidney cortex suggesting smaller cell size...
December 2016: Physiological Reports
https://www.readbyqxmd.com/read/27923328/modeling-stroma-induced-drug-resistance-in-a-tissue-engineered-tumor-model-of-ewing-sarcoma
#16
Marco Santoro, Brian A Menegaz, Salah-Eddine Lamhamedi-Cherradi, Eric R Molina, Danielle Wu, Waldemar Priebe, Joseph A Ludwig, Antonios G Mikos
Three-dimensional (3D) tumor models are gaining traction in the research community given their capacity to mimic aspects of the tumor microenvironment absent in monolayer systems. In particular, the ability to spatiotemporally control cell placement within ex vivo 3D systems has enabled the study of tumor-stroma interactions. Furthermore, by regulating biomechanical stimuli, one can reveal how biophysical cues affect stromal cell phenotype and how their phenotype impacts tumor drug sensitivity. Both tumor architecture and shear force have profound effects on Ewing sarcoma (ES) cell behavior and are known to elicit ligand-mediated activation of the insulin-like growth factor-1 receptor (IGF-1R), thereby mediating resistance of ES cells to IGF-1R inhibitors...
December 6, 2016: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/27922822/serum-protein-mediators-of-dementia-and-aging-proper
#17
Donald R Royall, Safa Al-Rubaye, Ram Bishnoi, Raymond F Palmer
The latent variable "δ" (for "dementia") appears to be uniquely responsible for the dementing aspects of cognitive impairment. Age, depressive symptoms, gender and the apolipoprotein E (APOE) ε4 allele are independently associated with δ. In this analysis, we explore serum proteins as potential mediators of age's specific association with δ in a large, ethnically diverse longitudinal cohort, the Texas Alzheimer's Research and Care Consortium (TARCC). 22 serum proteins were recognized as partial mediators of age's association with δ...
December 3, 2016: Aging
https://www.readbyqxmd.com/read/27919948/long-noncoding-rna-snar-regulates-proliferation-migration-and-invasion-of-triple-negative-breast-cancer-cells
#18
Jeeyeon Lee, Jin Hyang Jung, Yee Soo Chae, Ho Yong Park, Wan Wook Kim, Soo Jung Lee, Jae-Hwan Jeong, Seung Hee Kang
AIM: We evaluated the role of long noncoding ribonucleic acid (lncRNA) in breast cancer cell lines by quantitative reverse transcription-polymerase change reaction. MATERIALS AND METHODS: The effects of small NF90-associated RNA (snaR) with RNA interference on proliferation, migration and invasion of MDA-MB-231 cells were observed by 3-(4,5-dimethylthiazol-2yl)-2,5-diphenyltetrazolium bromide, wound healing and transwell assay. RESULTS: Among 90 lncRNAs, E2F transcription factor 4, p107/p130-binding (E2F4) antisense, insulin-like growth factor 2 antisense (IGF2AS), snaR, and small nucleolar RNA host gene 5 (SNHG5) were up-regulated in MDA-MB-231 and 7SK, antisense noncoding RNA in the INK4 locus (ANRIL), IGF2AS, Nespas, p53 mRNA, and snaR were up-regulated in MCF-7 cells...
December 2016: Anticancer Research
https://www.readbyqxmd.com/read/27919172/influence-of-glyco-oxidation-on-complexes-between-fibrin-ogen-and-insulin-like-growth-factor-binding-protein-1-in-patients-with-diabetes-mellitus-type-2
#19
Nikola Gligorijević, Ana Penezić, Olgica Nedić
Fibrinogen and insulin-like growth factor-binding protein (IGFBP-1) are tightly connected to metabolic changes and complications in patients with diabetes mellitus (DM), and since they mutually interact to form complexes in plasma, we investigated whether and to what extent IGFBP-1/fibrinogen complexes change due to glyco-oxidative processes in DM and whether they participate in fibrin clot formation. These complexes were determined by immunoblotting in plasma samples from healthy adults and patients with DM type 2...
December 5, 2016: Free Radical Research
https://www.readbyqxmd.com/read/27919008/phenotype-analysis-of-male-transgenic-mice-overexpressing-mutant-igfbp-2-lacking-the-cardin-weintraub-sequence-motif-reduced-expression-of-synaptic-markers-and-myelin-basic-protein-in-the-brain-and-a-lower-degree-of-anxiety-like-behaviour
#20
N Schindler, J Mayer, S Saenger, U Gimsa, C Walz, J Brenmoehl, D Ohde, E Wirthgen, A Tuchscherer, V C Russo, M Frank, T Kirschstein, F Metzger, A Hoeflich
Brain growth and function are regulated by insulin-like growth factors I and II (IGF-I and IGF-II) but also by IGF-binding proteins (IGFBPs), including IGFBP-2. In addition to modulating IGF activities, IGFBP-2 interacts with a number of components of the extracellular matrix and cell membrane via a Cardin-Weintraub sequence or heparin binding domain (HBD1). The nature and the signalling elicited by these interactions are not fully understood. Here, we examined transgenic mice (H1d-hBP2) overexpressing a mutant human IGFBP-2 that lacks a specific heparin binding domain (HBD1) known as the Cardin-Weintraub sequence...
November 16, 2016: Growth Hormone & IGF Research
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