التفاصيل البيبلوغرافية
| العنوان: |
Integration of pro-inflammatory cytokines, 12-lipoxygenase and NOX-1 in pancreatic islet beta cell dysfunction |
| المؤلفون: |
Weaver, Jessica R, Holman, Theodore R, Imai, Yumi, Jadhav, Ajit, Kenyon, Victor, Maloney, David J, Nadler, Jerry L, Rai, Ganesha, Simeonov, Anton, Taylor-Fishwick, David A |
| المصدر: |
Molecular and Cellular Endocrinology, vol 358, iss 1 |
| بيانات النشر: |
eScholarship, University of California |
| سنة النشر: |
2012 |
| المجموعة: |
University of California: eScholarship |
| مصطلحات موضوعية: |
Biochemistry and Cell Biology, Biomedical and Clinical Sciences, Biological Sciences, Autoimmune Disease, Diabetes, Development of treatments and therapeutic interventions, Aetiology, 2.1 Biological and endogenous factors, 5.1 Pharmaceuticals, Metabolic and endocrine, Acetophenones, Animals, Apoptosis, Arachidonate 12-Lipoxygenase, Caspase 3, Chemokine CCL2, Diabetes Mellitus, Eicosapentaenoic Acid, Enzyme Activation, Humans, Insulin-Secreting Cells, Interferon-gamma, Interleukin-1beta, Mice, NADH, NADPH Oxidoreductases, NADPH Oxidase 1, Onium Compounds, Oxidative Stress, Reactive Oxygen Species |
| جغرافية الموضوع: |
88 - 95 |
| الوصف: |
Elevated cellular reactive species, which can be produced by diabetic serum conditions such as elevated inflammatory cytokines, lipotoxicity or glucotoxicity contribute to islet beta cell dysfunction and cell death. Cellular pathways that result in beta cell oxidative stress are poorly resolved. In this study, stimulation of human donor islets, primary mouse islets or homogeneous beta cell lines with a cocktail of inflammatory cytokines (TNFα, IL-1β, and INFγ) significantly induced NADPH oxidase-1 (NOX-1) gene expression (p<0.05). This pro-inflammatory cytokine cocktail concomitantly induced loss of islet glucose stimulated insulin response (p<0.05), elevated expression of MCP-1 (p<0.01), increased cellular reactive oxygen species (ROS) and induced cell death. Inhibitors of NADPH oxidase, apocynin and diphenyleneiodonium, and a dual selective NOX1/4 inhibitor, blocked ROS generation (p<0.01) and induction of MCP-1 (p<0.05) by pro-inflammatory cytokines in beta cells. It has previously been reported that pro-inflammatory cytokine stimulation induces 12-lipoxygenase (12-LO) expression in human islets. 12-Hydroxyeicosatetraenoic acid (12-HETE), a product of 12-LO activity, stimulated NOX-1 expression in human islets (p<0.05). A novel selective inhibitor of 12-LO blocked induction of NOX-1, production of ROS and pro-caspase 3 cleavage by pro-inflammatory cytokines in INS-1 beta cells (p<0.01). Inhibition was not seen with a structurally related but inactive analog. Importantly, islets from human type 2 diabetic donors have an elevated expression of NOX-1 (p<0.05). This study describes an integrated pathway in beta cells that links beta cell dysfunction induced by pro-inflammatory cytokines with 12-lipoxygenase and NADPH oxidase (NOX-1) activation. Inhibitors of this pathway may provide a new therapeutic strategy to preserve beta cell mass in diabetes. |
| نوع الوثيقة: |
article in journal/newspaper |
| وصف الملف: |
application/pdf |
| اللغة: |
unknown |
| العلاقة: |
qt4b43h7xz; https://escholarship.org/uc/item/4b43h7xzTest |
| الإتاحة: |
https://escholarship.org/uc/item/4b43h7xzTest |
| حقوق: |
CC-BY |
| رقم الانضمام: |
edsbas.CEB2A660 |
| قاعدة البيانات: |
BASE |
