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Igf2 AND insulin

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https://www.readbyqxmd.com/read/28945762/nuclear-insulin-like-growth-factor-1-receptor-igf1r-displays-proliferative-and-regulatory-activities-in-non-malignant-cells
#1
Ravid Solomon-Zemler, Rive Sarfstein, Haim Werner
The insulin-like growth factor-1 receptor (IGF1R) mediates the biological actions of IGF1 and IGF2. The IGF1R is involved in both physiological and pathological activities and is usually overexpressed in most types of cancer. In addition to its classical mechanism of action, recent evidence has shown a nuclear presence of IGF1R, associated with novel genomic/transcriptional types of activities. The present study was aimed at evaluating the hypothesis that nuclear IGF1R localization is not restricted to cancer cells and might constitute a novel physiologically relevant regulatory mechanism...
2017: PloS One
https://www.readbyqxmd.com/read/28923480/impact-of-morphine-on-the-expression-of-insulin-receptor-and-protein-levels-of-insulin-igfs-in-rat-neural-stem-cells
#2
Sadegh Salarinasab, AliReza Nourazarian, Masoud Nikanfar, Nima Abdyazdani, Masoumeh Kazemi, Navid Feizy, Reza Rahbarghazi
Alzheimer's disease is correlated with neuronal degeneration and loss of neuronal precursors in different parts of the brain. It has been found disturbance in the homeostasis neural stem cells (NSCs) can cause neurodegeneration. Morphine, an analgesic agent, can disrupt the dynamic and normal state of NSCs. However, more investigations are required to clearly address underlying mechanisms. The current experiment aimed to investigate the effects of morphine on the cell distribution of insulin factor and receptor and insulin-like growth factors (IGF1, IGF2) in NSCs...
November 1, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28919726/gene-expression-levels-of-the-insulin-like-growth-factor-family-in-patients-with-amd-before-and-after-ranibizumab-intravitreal-injections
#3
Barbara Strzalka-Mrozik, Malgorzata Kimsa-Furdzik, Adam Kabiesz, Katarzyna Michalska-Malecka, Malgorzata Nita, Urszula Mazurek
PURPOSE: The present study focused on the assessment of the mRNA levels of the insulin-like growth factor (IGF) family in patients with the exudative form of age-related macular degeneration (AMD) before and after ranibizumab intravitreal injections. PATIENTS AND METHODS: An analysis of the expression profile of the IGF family of genes in patients with AMD was carried out using the oligonucleotide microarray and quantitative reverse transcriptase polymerase chain reaction (RT-qPCR) methods...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/28916632/tissue-sex-and-age-specific-dna-methylation-of-rat-glucocorticoid-receptor-gene-promoter-and-insulin-like-growth-factor-2-imprinting-control-region
#4
Ogechukwu Brenda Agba, Ludwig Lausser, Klaus Huse, Christoph Bergmeier, Niels Jahn, Marco Groth, Martin Bens, Arne Sahm, Maria Gall, Otto W Witte, Hans A Kestler, Matthias Schwab, Matthias Platzer
Tissue-, sex- and age-specific epigenetic modifications such as DNA methylation are largely unknown. Changes in DNA methylation of the glucocorticoid receptor gene (NR3C1) and imprinting control region (ICR) of IGF2 and H19 genes during the lifespan are particularly interesting since these genes are susceptible to epigenetic modifications by prenatal stress or malnutrition. They are important regulators of development and aging. Methylation changes of NR3C1 affect glucocorticoid receptor expression, which is associated with stress sensitivity and stress-related diseases predominantly occurring during aging...
September 15, 2017: Physiological Genomics
https://www.readbyqxmd.com/read/28910276/igf2-stimulates-fetal-growth-in-a-sex-and-organ-dependent-manner
#5
Veronica White, Alicia Jawerbaum, Maria Belen Mazzucco, Martin Gauster, Gernot Desoye, Ursula Hiden
BACKGROUND: IGF2 is a key determinant of fetal growth, and altered expression of IGF2 is implicated in fetal growth disorders and maternal metabolic derangements including gestational diabetes. Here we studied how increased levels of IGF2 in late pregnancy affect fetal growth. METHODS: We employed a rat model of repeated intra-fetal IGF2 administration in late pregnancy, i.e. during GD19-GD21, and measured the consequences on fetal organ weight and expression of insulin/IGF-axis components...
September 14, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28882129/igf1r-activation-and-the-in-vitro-antiproliferative-efficacy-of-igf1r-inhibitor-are-inversely-correlated-with-igfbp5-expression-in-bladder-cancer
#6
Yann Neuzillet, Elodie Chapeaublanc, Clémentine Krucker, Leanne De Koning, Thierry Lebret, François Radvanyi, Isabelle Bernard-Pierrot
BACKGROUND: The insulin growth factor (IGF) pathway has been proposed as a potential therapeutic target in bladder cancer. We characterized the expression of components of the IGF pathway - insulin growth factor receptors (INSR, IGF1R, IGF2R), ligands (INS, IGF1, IGF2), and binding proteins (IGFBP1-7, IGF2BP1-3) - in bladder cancer and its correlation with IGF1R activation, and the anti-proliferative efficacy of an IGF1R kinase inhibitor in this setting. METHODS: We analyzed transcriptomic data from two independent bladder cancer datasets, corresponding to 200 tumoral and five normal urothelium samples...
September 7, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28877460/persistence-of-pancreatic-insulin-mrna-expression-and-proinsulin-protein-in-type-1-diabetes-pancreata
#7
Clive Wasserfall, Harry S Nick, Martha Campbell-Thompson, Dawn Beachy, Leena Haataja, Irina Kusmartseva, Amanda Posgai, Maria Beery, Christopher Rhodes, Ezio Bonifacio, Peter Arvan, Mark Atkinson
The canonical notion that type 1 diabetes (T1D) results following a complete destruction of β cells has recently been questioned as small amounts of C-peptide are detectable in patients with long-standing disease. We analyzed protein and gene expression levels for proinsulin, insulin, C-peptide, and islet amyloid polypeptide within pancreatic tissues from T1D, autoantibody positive (Ab+), and control organs. Insulin and C-peptide levels were low to undetectable in extracts from the T1D cohort; however, proinsulin and INS mRNA were detected in the majority of T1D pancreata...
September 5, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28873464/direct-integrin-binding-to-insulin-like-growth-factor-2-through-the-c-domain-is-required-for-insulin-like-growth-factor-receptor-type-1-igf1r-signaling
#8
Dora Maria Cedano Prieto, Yushen Cheng, Chih-Chieh Chang, Jessica Yu, Yoko K Takada, Yoshikazu Takada
We have reported that integrins crosstalk with growth factors through direct binding to growth factors (e.g., fibroblast growth factor-1, insulin-like growth factor 1 (IGF1), neuregulin-1, fractalkine) and subsequent ternary complex formation with cognate receptor [e.g., integrin/IGF1/IGF1 receptor (IGF1R)]. IGF1 and IGF2 are overexpressed in cancer and major therapeutic targets. We previously reported that IGF1 binds to integrins ανβ3 and α6β4, and the R36E/R37E mutant in the C-domain of IGF1 is defective integrin binding and signaling functions of IGF1, and acts as an antagonist of IGF1R...
2017: PloS One
https://www.readbyqxmd.com/read/28867213/transgenerational-pancreatic-impairment-with-igf2-h19-epigenetic-alteration-induced-by-p-p-dde-exposure-in-early-life
#9
Yang Song, Lei Yang
The hypothesis of fetal origins indicates that exposures in early development could induce epigenetic modifications in the male germ-line, affecting the susceptibility of adult-onset disease for generations. p,p'-DDE, the primary metabolite of persistent organochlorine pesticide DDT, is highly correlated with impaired glucose tolerance (IGT) and a strong contributing factor to type 2 diabetes. In our previous study, ancestral p,p'-DDE exposure could induce transgenerational impaired male fertility with sperm Igf2 hypomethylation...
October 5, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28856768/meat-and-nutritional-quality-comparison-of-purebred-and-crossbred-pigs
#10
Jie Zhang, Jie Chai, Zonggang Luo, Hang He, Lei Chen, Xueqin Liu, Qinfei Zhou
Crossbreeding is an effective method of improving the efficiency and profit of production in commercial pig operations. To understand the effect of crossbreeding on meat and nutrient quality, a combination including three purebred (Duroc, D; Landrace, L; Yorkshire, Y) and two crossbred pig lines (Landrace × Yorkshire, LY; Duroc × (Landrace × Yorkshire), DLY) frequently used internationally were studied. The results showed that meat from the LY and DLY crosses had lower values for lightness L24h∗, shear force and epinephrine and higher values for drip loss, C18:1, insulin, glucagon and monounsaturated fatty acids than D, L and Y pigs...
August 30, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28838325/a-study-on-the-safety-and-efficacy-of-reveglucosidase-alfa-in-patients-with-late-onset-pompe-disease
#11
Barry J Byrne, Tarekegn Geberhiwot, Bruce A Barshop, Richard Barohn, Derralynn Hughes, Drago Bratkovic, Claude Desnuelle, Pascal Laforet, Eugen Mengel, Mark Roberts, Peter Haroldsen, Kristin Reilley, Kala Jayaram, Ke Yang, Liron Walsh
BACKGROUND: Late-onset Pompe disease is a rare genetic neuromuscular disorder caused by lysosomal acid alpha-glucosidase (GAA) deficiency that ultimately results in mobility loss and respiratory failure. Current enzyme replacement therapy with recombinant human (rh)GAA has demonstrated efficacy in subjects with late-onset Pompe disease. However, long-term effects of rhGAA on pulmonary function have not been observed, likely related to inefficient delivery of rhGAA to skeletal muscle lysosomes and associated deficits in the central nervous system...
August 24, 2017: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/28821223/maternal-nutrient-restriction-in-mid-to-late-gestation-influences-fetal-mrna-expression-in-muscle-tissues-in-beef-cattle
#12
Francois Paradis, Katie M Wood, Kendall C Swanson, Stephen P Miller, Brian W McBride, Carolyn Fitzsimmons
BACKGROUND: Manipulating maternal nutrition during specific periods of gestation can result in re-programming of fetal and post-natal development. In this experiment we investigated how a feed restriction of 85% compared with 140% of total metabolizable energy requirements, fed to cows during mid-to-late gestation, influences phenotypic development of fetuses and mRNA expression of growth (Insulin-Like Growth Factor family and Insulin Receptor (INSR)), myogenic (Myogenic Differentiation 1 (MYOD1), Myogenin (MYOG), Myocyte Enhancer Factor 2A (MEF2A), Serum Response Factor (SRF)) and adipogenic (Peroxisome Proliferator Activated Receptor Gamma (PPARG)) genes in fetal longissimus dorsi (LD) and semitendinosus (ST) muscle...
August 18, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28793874/picropodophyllin-ppp-is-a-potent-rhabdomyosarcoma-growth-inhibitor-both-in-vitro-and-in-vivo
#13
Maciej Tarnowski, Marta Tkacz, Katarzyna Zgutka, Joanna Bujak, Patrycja Kopytko, Andrzej Pawlik
BACKGROUND: Insulin-like growth factors and insulin are important factors promoting cancer growth and metastasis. The molecules act through IGF1 (IGF1R) and insulin (InsR) receptors. Rhambodmyosarcomas (RMS) overproduce IGF2 - a potent ligand for IGF1R and, at the same time, highly express IGF1 receptor. The purpose of the study was to evaluate possible application of picropodophyllin (PPP) - a potent IGF1R inhibitor. METHODS: In our study we used a number of in vitro assays showing influence of IGF1R blockage on RMS cell lines (both ARMS and ERMS) proliferation, migration, adhesion, cell cycling and signal transduction pathways...
August 9, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28776905/expression-of-cytokine-and-extracellular-matrix-mrnas-in-fetal-hepatic-stellate-cells
#14
Keai Sinn Tan, Kasem Kulkeaw, Yoichi Nakanishi, Daisuke Sugiyama
In mouse fetal liver, hepatoblasts, sinusoidal endothelial cells and macrophages (or erythroblastic islands) promote differentiation and proliferation of hematopoietic cells through cell-cell interactions and secretion of cytokines and extracellular matrix factors. Until now, we have had little knowledge of the hematopoietic cytokines or extracellular matrix mRNAs expressed in hepatic stellate cells. Using p75 neurotrophin receptor (p75NTR) to mark this cell population, we sorted 12.5, 14.5 and 16.5 dpc hepatic stellate cells and analyzed expression of cytokines and extracellular matrix mRNAs...
September 2017: Genes to Cells: Devoted to Molecular & Cellular Mechanisms
https://www.readbyqxmd.com/read/28775169/loss-of-igf2-gene-imprinting-in-murine-prostate-promotes-widespread-neoplastic-growth
#15
Nathan A Damaschke, Bing Yang, Sachin Bhusari, Mele Avilla, Weixiong Zhong, Michael L Blute, Wei Huang, David F Jarrard
Loss of imprinting (LOI) is an epigenetic event that relaxes an allele-specific restriction on gene expression. One gene that experiences LOI is the paracrine insulin-like growth factor IGF2, which occurs commonly in human prostate tissues during aging and tumorigenesis. However, the relationship between IGF2 LOI and prostate tumorigenesis has not been established functionally. In this study, we created a mouse model with CTCF-binding site mutations at the Igf2-H19 imprint control region that abolishes CTCF insulator activity, resulting in biallelic Igf2 expression that mimics increased levels seen with aging-induced LOI...
August 3, 2017: Cancer Research
https://www.readbyqxmd.com/read/28760855/dual%C3%A2-targeting%C3%A2-of%C3%A2-insulin%C3%A2-receptor%C3%A2-and%C3%A2-kit%C3%A2-in%C3%A2-imatinib-resistant%C3%A2-gastrointestinal%C3%A2-stromal%C3%A2-tumors
#16
Weicai Chen, Ye Kuang, Hai-Bo Qiu, Zhifa Cao, Yuqing Tu, Qing Sheng, Grant Eilers, Quan He, Hai-Long Li, Meijun Zhu, Yuexiang Wang, Rongqing Zhang, Yeqing Wu, Fanguo Meng, Jonathan A Fletcher, Wen-Bin Ou
Oncogenic KIT or PDGFRA receptor tyrosine kinase (RTK) mutations are compelling therapeutic targets in gastrointestinal stromal tumors (GIST), and treatment with the KIT/PDGFRA inhibitor imatinib is the standard of care for patients with metastatic GIST. Most GIST eventually acquire imatinib resistance due to secondary mutations in the KIT kinase domain, but it is unclear whether these genomic resistance mechanisms require other cellular adaptations to create a clinically meaningful imatinib-resistant state...
July 31, 2017: Cancer Research
https://www.readbyqxmd.com/read/28753127/igf2-mrna-binding-protein-2-is-a-tumor-promoter-that-drives-cancer-proliferation-through-its-client-mrnas-igf2-and-hmga1
#17
Ning Dai, Fei Ji, Jason Wright, Liliana Minichiello, Ruslan Sadreyev, Joseph Avruch
The gene encoding the Insulin-like Growth Factor 2 mRNA binding protein 2/IMP2 is amplified and overexpressed in many human cancers, accompanied by a poorer prognosis. Mice lacking IMP2 exhibit a longer lifespan and a reduced tumor burden at old age. Herein we show in a diverse array of human cancer cells that IMP2 overexpression stimulates and IMP2 elimination diminishes proliferation by 50-80%. In addition to its known ability to promote the abundance of Insulin-like Growth Factor 2/IGF2, we find that IMP2 strongly promotes IGF action, by binding and stabilizing the mRNA encoding the DNA binding protein HMGA1, a known oncogene...
July 28, 2017: ELife
https://www.readbyqxmd.com/read/28744919/differential-expression-of-insulin-like-growth-factor-family-members-in-immature-cumulus-oocyte-complexes-from-dairy-cows-with-different-genotypes
#18
A C Lopes, M P Palhão, Cac Fernandes, M J Sudano, Acs Castilho, E S Caixeta
It has been evident the improvement of in vitro embryo production (IVEP) in dairy cows. Nevertheless, it is known that differences in the number and quality of oocytes between taurine and zebu females impact the efficiency and economic viability of IVEP. As the insulin-like growth factor (IGF) system is related to follicular and oocyte development, we aimed to quantify mRNA abundance of IGF system members and pregnancy-associated plasma protein-A (PAPPA) in the cumulus-oocyte complexes (COCs) of Gir, 1/2 Holstein × 1/2 Gir and Holstein cows...
July 25, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28736533/let-7b-regulates-myoblast-proliferation-by-inhibiting-igf2bp3-expression-in-dwarf-and-normal-chicken
#19
Shumao Lin, Wen Luo, Yaqiong Ye, Endashaw J Bekele, Qinghua Nie, Yugu Li, Xiquan Zhang
The sex-linked dwarf chicken is caused by the mutation of growth hormone receptor (GHR) gene and characterized by shorter shanks, lower body weight, smaller muscle fiber diameter and fewer muscle fiber number. However, the precise regulatory pathways that lead to the inhibition of skeletal muscle growth in dwarf chickens still remain unclear. Here we found a let-7b mediated pathway might play important role in the regulation of dwarf chicken skeletal muscle growth. Let-7b has higher expression in the skeletal muscle of dwarf chicken than in normal chicken, and the expression of insulin-like growth factor 2 mRNA binding protein 3 (IGF2BP3), which is a translational activator of IGF2, showed opposite expression trend to let-7b...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28735866/microrna-193-5p-modulates-angiogenesis-through-igf2-in-type-2-diabetic-cardiomyopathy
#20
Fan Yi, Yuqiang Shang, Bing Li, Shilin Dai, Wei Wu, Long Cheng, Xiancan Wang
BACKGROUND: Patients with diabetic cardiomyopathy are often associated with increasing risk of heart failure. In this work, we used animal model to characterize the angiogenic effect of microRNA-193-5p, miR-193-5p in type 2 diabetic Goto-Kakizaki (GK) rats' myocardial microvascular endothelial cells, MMEC(GK). METHODS: MiR-193-5p in MMEC(GK) was compared to its expression in Wistar rat MMEC. In MMEC(GK), miR-193-5p was downregulated through viral infection. Its angiogenic effects on MMEC(GK) migration and proliferation were assessed by transwell and MTT assays, respectively...
September 30, 2017: Biochemical and Biophysical Research Communications
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