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https://www.readbyqxmd.com/read/28107503/osteopontin-affects-insulin-vesicle-localization-and-ca2-homeostasis-in-pancreatic-beta-cells-from-female-mice
#1
Anna Wendt, Inês G Mollet, Anki Knutsson, Victor S Bolmgren, Anna Hultgårdh-Nilsson, Maria F Gomez, Lena Eliasson
Type 2 diabetic patients suffer from insulin resistance and reduced insulin secretion. Osteopontin (OPN), a versatile protein expressed in several tissues throughout the body including the islets of Langerhans, has previously been implicated in the development of insulin resistance. Here we have investigated the role of OPN in insulin secretion using an OPN knock out mouse model (OPN-/-). Ultra-structural analyzes of islets from OPN-/- and WT mice indicated weaker cell-cell connections between the islet cells in the OPN-/- mouse compared to WT...
2017: PloS One
https://www.readbyqxmd.com/read/28106773/determinants-of-serum-glycerophospholipid-fatty-acids-in-cystic-fibrosis
#2
Sławomira Drzymała-Czyż, Patrycja Krzyżanowska, Berthold Koletzko, Jan Nowak, Anna Miśkiewicz-Chotnicka, Jerzy A Moczko, Aleksandra Lisowska, Jarosław Walkowiak
The etiology of altered blood fatty acid (FA) composition in cystic fibrosis (CF) is understood only partially. We aimed to investigate the determinants of serum glycerophospholipids' FAs in CF with regard to the highest number of FAs and in the largest cohort to date. The study comprised 172 CF patients and 30 healthy subjects (HS). We assessed Fas' profile (gas chromatography/mass spectrometry), CF transmembrane conductance regulator (CFTR) genotype, spirometry, fecal elastase-1, body height and weight Z-scores, liver disease, diabetes and colonization by Pseudomonas aeruginosa...
January 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28106150/diabetes-controlling-the-identity-of-the-adult-pancreatic-%C3%AE-cell
#3
Guy A Rutter
No abstract text is available yet for this article.
January 20, 2017: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/28105738/glucagon-like-peptide-1-agonists-and-risk-of-acute-pancreatitis-in-patients-with-type-2-diabetes
#4
Heidi Storgaard, Frederik Cold, Lise L Gluud, Tina Vilsbøll, Filip K Knop
Glucagon-like peptide-1 receptor agonist (GLP-1RAs) labels warn about acute pancreatitis (AP) and impose doctors to inform patients about symptoms of AP. Here we systematically reviewed the risk of AP in randomized placebo-controlled trials (RCTs) investigating the effect of GLP-1RAs in type 2 diabetes. We performed a systematic review with meta-analysis of long-term (minimum 24 months), placebo-controlled GLP-1RA RCTs in which AP was a predefined adverse event and adjudicated by blinded and independent adjudicating committees...
January 20, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28104298/kr%C3%A3-pple-like-factor-10-regulates-radio-sensitivity-of-pancreatic-cancer-via-uv-radiation-resistance-associated-gene
#5
Vincent Hung-Shu Chang, Yi-Chih Tsai, Ya-Li Tsai, Shu-Ling Peng, Su-Liang Chen, Tsung Ming Chang, Winston Chun-Yuan Yu, Hui-Ju Ch'ang
BACKGROUND AND PURPOSE: Krüpple-like factor 10 (Klf10), an early response gene of TGFβ, was reported to be a prognostic biomarker for pancreatic cancer survival. The role of Klf10 in predicting tumor response to cancer treatment is unknown. MATERIALS AND METHODS: Genetically manipulated MiaPaCa and Panc-1 cells were established to evaluate clonogenic survival, autophagy, apoptosis and DNA repair after radiation. The interaction between Klf10 and UV radiation resistance-associated gene (UVRAG) was demonstrated by ChiP-PCR and luciferase reporter assay...
January 16, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28102311/plin2-is-a-key-regulator-of-the-unfolded-protein-response-and-endoplasmic-reticulum-stress-resolution-in-pancreatic-%C3%AE-cells
#6
Elaine Chen, Tsung Huang Tsai, Lan Li, Pradip Saha, Lawrence Chan, Benny Hung-Junn Chang
Progressive pancreatic β cell failure underlies the transition of impaired glucose tolerance to overt diabetes; endoplasmic reticulum (ER) stress expedites β cell failure in this situation. ER stress can be elicited by lipotoxicity and an increased demand for insulin in diabetes. We previously reported that the lipid droplet protein perilipin 2 (PLIN2) modulates lipid homeostasis in the liver. Here, we show that PLIN2 modulates the unfolded protein response (UPR) and ER stress in pancreatic β cells. PLIN2 expression goes up when β cells are exposed to a lipid load or to chemical ER stress inducers...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28101933/associations-of-common-variants-in-the-slc16a11-tcf7l2-and-abca1-genes-with-pediatric-onset-type-2-diabetes-and-related-glycemic-traits-in-families-a-case-control-and-case-parent-trio-study
#7
América L Miranda-Lora, Miguel Cruz, Mario Molina-Díaz, Jorge Gutiérrez, Samuel Flores-Huerta, Miguel Klünder-Klünder
BACKGROUND: There is evidence of associations of single-nucleotide polymorphisms (SNPs) with type 2 diabetes (T2D) and related glycemic traits in adults, but there is a little information about such associations in youths. OBJECTIVE: The aim of this study was to evaluate the associations of SNPs in the TCF7L2, SLC16A11, and ABCA1 genes with T2D and related glycemic traits in Mexican children and adolescents. SUBJECTS: A total of 99 families with children with T2D (n = 327) and 83 families with children without the disease (n = 212)...
January 19, 2017: Pediatric Diabetes
https://www.readbyqxmd.com/read/28101643/polymorphisms-in-genes-encoding-mir-155-and-mir-146a-are-associated-with-protection-to-type-1-diabetes-mellitus
#8
Taís S Assmann, Guilherme C K Duarte, Letícia A Brondani, Pedro H O de Freitas, Égina M Martins, Luís H Canani, Daisy Crispim
AIMS: Type 1 diabetes mellitus (T1DM) is characterized by severe autoimmune destruction of pancreatic beta-cells. The triggering of autoimmunity against beta-cells is probably caused by a combination of environmental and genetic risk factors. Even though much is known about the genetic of T1DM, more information is needed to completely unravel this tangled disease. MicroRNAs (miRNAs) are a class of small noncoding RNAs molecules that negatively regulate gene expression by inducing target mRNA cleavage or by inhibiting protein translation...
January 19, 2017: Acta Diabetologica
https://www.readbyqxmd.com/read/28101143/clinical-aspects-of-pancreatogenic-diabetes-secondary-to-hereditary-pancreatitis
#9
Marcio Garrison Dytz, Pedro Arthur Hamamoto Marcelino, Olga de Castro Santos, Lenita Zajdenverg, Flavia Lucia Conceição, Tânia Maria Ortiga-Carvalho, Melanie Rodacki
BACKGROUND: Hereditary pancreatitis is a rare inherited form of pancreatitis, characterized by recurrent episodes of acute pancreatitis with early onset and/or chronic pancreatitis, and presenting brittle diabetes, composed of episodes of nonketotic hyperglycemia and severe hypoglycemia. The existing literature regarding this form of diabetes is scarce. In this report, clinical features of pancreatogenic diabetes secondary to hereditary pancreatitis are presented along with recommendations for appropriate medical treatment...
2017: Diabetology & Metabolic Syndrome
https://www.readbyqxmd.com/read/28100901/pancreas-transplant-with-duodeno-duodenostomy-and-caval-drainage-using-a-diamond-patch-graft-a-single-center-experience
#10
Je Ho Ryu, Tae Beom Lee, Young Mok Park, Kwang Ho Yang, Chong Woo Chu, Jung Hee Lee, Taeun Kim, Byung Hyun Choi
BACKGROUND The surgical technique used in pancreas transplant is essential for patient safety and graft survival, and problems exist with conventional strategies. When enteric exocrine drainage is performed, there is no method of immunologic monitoring other than direct graft pancreas biopsy. The most common cause of early graft failure is graft thrombosis, and adequate preventive and treatment strategies are unclear. To overcome these disadvantages, we suggest a modified surgical technique. MATERIAL AND METHODS Eleven patients underwent pancreas transplant with our modified technique...
January 19, 2017: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/28100871/in-vivo-direct-reprogramming-of-liver-cells-to-insulin-producing-cells-by-virus-free-overexpression-of-defined-factors
#11
Xiao-Fei Yang, Li-Wei Ren, Lu Yang, Chun-Yan Deng, Fu-Rong Li
Direct reprogramming of autologous cells from diabetes patients to insulin producing cells is a new method for pancreatic cell replacement therapy. At present, transdifferentiation among mature cells is achieved mainly by introducing foreign genes into the starting tissue with viral vector, but there are potentical safety problems. In the present study, we delivered plasmids carrying Pdx1, Neurog3 and MafA genes (PNM) into mouse hepatocytes by hydrodynamics tail vein injection, investigated islet β cells markers in transfected cells from protein and mRNA level, and then observed the long-term control of blood glucose in diabetic mice...
January 18, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28100774/loss-of-cyclin-dependent-kinase-2-in-the-pancreas-links-primary-%C3%AE-cell-dysfunction-to-progressive-depletion-of-%C3%AE-cell-mass-and-diabetes
#12
So Yoon Kim, Ji-Hyeon Lee, Matthew J Merrins, Oksana Gavrilova, Xavier Bisteau, Philipp Kaldis, Leslie S Satin, Sushil G Rane
The failure of pancreatic islet β-cells is a major contributor to the etiology of Type 2 diabetes. β-cell dysfunction and declining β-cell mass are two mechanisms that contribute to this failure, although it is unclear if they are molecularly linked. Here, we show that the cell cycle regulator, cyclin-dependent kinase 2 (Cdk2), couples primary β-cell dysfunction to the progressive deterioration of β-cell mass in diabetes. Mice with pancreas-specific deletion of Cdk2 are glucose intolerant primarily due to defects in glucose-stimulated insulin secretion...
January 18, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28099206/is-a-%C3%AE-cell-a-%C3%AE-cell
#13
Chaoxing Yang, Feorillo Galivo, Craig Dorrell
PURPOSE OF REVIEW: This report examines recent publications identifying phenotypic and functional heterogeneity among pancreatic β cells and investigating their potential roles in normal and abnormal islet function. The development of new methods and tools for the study of individual islet cells has produced a surge of interest in this topic. RECENT FINDINGS: Studies of β cell maturation and pregnancy-induced proliferation have identified changes in serotonin and transcription factors SIX2/3 expression as markers of temporal heterogeneity...
January 17, 2017: Current Opinion in Endocrinology, Diabetes, and Obesity
https://www.readbyqxmd.com/read/28098903/vitexin-alleviates-lipopolysaccharide%C3%A2-induced-islet-cell-injury-by-inhibiting-hmgb1-release
#14
Feifei Wang, Jiajing Yin, Yujin Ma, Hongwei Jiang, Yanbo Li
Diabetes mellitus (DM) is a chronic metabolic disease, where the predominant pathogenesis is pancreatic β‑cells dysfunction or injury. It has been well established that inflammation leads to a gradual exhaustion of pancreatic β‑cell function with decreased β‑cell mass likely resulting from pancreatic β‑cells apoptosis or death. Vitexin, a major bioactive flavonoid compound in plants has numerous pharmacological properties, including antioxidant, anti‑inflammatory and antimyeloperoxidase. Whether vitexin can protect pancreatic β‑cells against lipopolysaccharide (LPS)‑induced pro‑inflammatory cytokine production and apoptosis has received little attention...
January 12, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28097011/a-selective-gpr40-ffar1-agonist-ly2881835-provides-immediate-and-durable-glucose-control-in-rodent-models-of-type-2-diabetes
#15
Yanyun Chen, Min Song, Jonathan P Riley, Charlie C Hu, Xianbu Peng, Donalyn Scheuner, Krister Bokvist, Pranab Maiti, Steven D Kahl, Chahrzad Montrose-Rafizadeh, Chafiq Hamdouchi, Anne Reifel Miller
LY2881835 is a selective, potent, and efficacious GPR40 agonist. The objective of the studies described here was to examine the pharmacological properties of LY2881835 in preclinical models of T2D. Significant increases in insulin secretion were detected when LY2881835 was tested in primary islets from WT mice but not in islets from GPR40 KO mice. Furthermore, LY2881835 potentiated glucose stimulated insulin secretion in normal lean mice. Acute administration of LY2881835 lowered glucose during OGTTs in WT mice but not in GPR40 KO mice...
December 2016: Pharmacology Research & Perspectives
https://www.readbyqxmd.com/read/28096259/bariatric-surgery-enhances-splanchnic-vascular-responses-in-patients-with-type-2-diabetes
#16
Henri Honka, Jukka Koffert, Saila Kauhanen, Jarmo Teuho, Saija Hurme, Andrea Mari, Andreas Lindqvist, Nils Wierup, Leif Groop, Pirjo Nuutila
Bariatric surgery results in notable weight loss and alleviates hyperglycemia in patients with type 2 diabetes (T2D). In this study, we aimed to characterize the vascular effects of a mixed-meal and of infusion of exogenous glucose-dependent insulinotropic polypeptide (GIP) in the splanchnic region in ten obese patients with T2D before and after bariatric surgery and in ten lean controls. The experiments were carried out on two separate days. Pancreatic and intestinal blood flow (BF) were measured at baseline, 20 and 50 minutes with (15)O-water using positron emission tomography and magnetic resonance imaging (PET/MRI)...
January 17, 2017: Diabetes
https://www.readbyqxmd.com/read/28096201/serum-c-peptide-total-and-high-molecular-weight-adiponectin-and-pancreatic-cancer-do-associations-differ-by-smoking
#17
Leticia M Nogueira, Christina C Newton, Michael N Pollak, Debra T Silverman, Demetrius Albanes, Satu Männistö, Stephanie J Weinstein, Eric J Jacobs, Rachael Z Stolzenberg-Solomon
BACKGROUND: Studies examining associations between circulating concentrations of C-peptide and total adiponectin, two biomarkers related to obesity and insulin secretion and sensitivity and pancreatic ductal adenocarcinoma (PDA) risk have shown inconsistent results and included limited numbers of smokers. METHODS: We examined associations of these biomarkers and high molecular weight (HMW) adiponectin with PDA, overall, and by smoking status. We conducted a pooled nested case-control analysis in 3 cohorts (Prostate, Lung, Colorectal, and Ovarian Cancer Trial, Alpha-Tocopherol, Beta-Carotene Cancer Prevention Study, and Cancer Prevention Study-II), with 758 cases (435 current smokers) and 1052 controls (531 smokers) matched by cohort, age, sex, race, blood draw date and follow-up time...
January 17, 2017: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/28095743/adult-murine-pancreatic-progenitors-require-egf-and-nicotinamide-for-self-renewal-and-differentiation-in-a-serum-and-conditioned-medium-free-culture
#18
Lena Wedeken, Angela Luo, Jacob R Tremblay, Jeffrey Rawson, Liang Jin, Dan Gao, Janine Quijano, Hsun Teresa Ku
Adult pancreatic stem and progenitor cells may serve as an alternative source of insulin-secreting endocrine cells in cell replacement therapy for type 1 diabetes, but much remained unknown about these cells. We previously identified adult murine pancreatic progenitor-like cells that displayed in vitro self-renewal and tri-lineage differentiation activities in a 3-dimensional colony/organoid assay containing 1% methylcellulose and 5% Matrigel. However, the presence of other undefined culture components, such as serum and conditioned medium, has prevented a complete understanding of the signals required for progenitor cell growth...
January 17, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28095040/consensus-statement-by-the-american-association-of-clinical-endocrinologists-and-american-college-of-endocrinology-on-the-comprehensive-type-2-diabetes-management-algorithm-2017-executive-summary
#19
Alan J Garber, Martin J Abrahamson, Joshua I Barzilay, Lawrence Blonde, Zachary T Bloomgarden, Michael A Bush, Samuel Dagogo-Jack, Ralph A DeFronzo, Daniel Einhorn, Vivian A Fonseca, Jeffrey R Garber, W Timothy Garvey, George Grunberger, Yehuda Handelsman, Irl B Hirsch, Paul S Jellinger, Janet B McGill, Jeffrey I Mechanick, Paul D Rosenblit, Guillermo E Umpierrez
EXECUTIVE SUMMARY This algorithm for the comprehensive management of persons with type 2 diabetes (T2D) was developed to provide clinicians with a practical guide that considers the whole patient, their spectrum of risks and complications, and evidence-based approaches to treatment. It is now clear that the progressive pancreatic beta-cell defect that drives the deterioration of metabolic control over time begins early and may be present before the diagnosis of diabetes (1). In addition to advocating glycemic control to reduce microvascular complications, this document highlights obesity and prediabetes as underlying risk factors for the development of T2D and associated macrovascular complications...
January 17, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28094469/immunohistochemical-assessment-of-glucagon-like-peptide-1-receptor-glp-1r-expression-in-the-pancreas-of-patients-with-type-2-diabetes
#20
Rikke Kaae Kirk, Charles Pyke, Matthias G von Herrath, Jane Preuss Hasselby, Lars Pedersen, Pia Gottrup Mortensen, Lotte Bjerre Knudsen, Ken Coppieters
Glucagon-like peptide-1 (GLP-1) is an incretin hormone which stimulates insulin release and inhibits glucagon secretion from the pancreas in a glucose-dependent manner. Incretin-based therapies, consisting of GLP-1 receptor (GLP-1R) agonists and dipeptidyl peptidase-4 (DPP-4) inhibitors, are used for the treatment of T2D. Immunohistochemical studies for GLP-1R expression have previously been hampered by the use of unspecific polyclonal antibodies. This study used a new monoclonal antibody to assess GLP-1R expression in pancreatic tissue from 23 patients with T2D, including 7 with a DPP-4 inhibitor and 1 with a GLP-1R agonist treatment history...
January 17, 2017: Diabetes, Obesity & Metabolism
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