Interleukin-1 Plus γ-Interferon-Induced Pancreatic β-Cell Dysfunction Is Mediated by β-Cell Nitric Oxide Production
| العنوان: | Interleukin-1 Plus γ-Interferon-Induced Pancreatic β-Cell Dysfunction Is Mediated by β-Cell Nitric Oxide Production |
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| المؤلفون: | H. E. Thomas, Thomas W.H. Kay, Rima Darwiche, John A. Corbett |
| المصدر: | Diabetes. 51:311-316 |
| بيانات النشر: | American Diabetes Association, 2002. |
| سنة النشر: | 2002 |
| مصطلحات موضوعية: | endocrine system, medicine.medical_specialty, endocrine system diseases, DNA damage, Ductal cells, Endocrinology, Diabetes and Metabolism, Nitric Oxide Synthase Type II, Mice, Inbred Strains, Mice, Transgenic, In Vitro Techniques, Nitric Oxide, Nitric oxide, Interferon-gamma, Islets of Langerhans, Mice, chemistry.chemical_compound, Mice, Inbred NOD, Internal medicine, Insulin Secretion, Internal Medicine, medicine, Animals, Insulin, Receptor, Cell damage, Genes, Dominant, Receptors, Interferon, geography, geography.geographical_feature_category, Cell Death, biology, Interleukin, Islet, medicine.disease, Molecular biology, Nitric oxide synthase, Drug Combinations, Glucose, Endocrinology, chemistry, biology.protein, Nitric Oxide Synthase, Interleukin-1 |
| الوصف: | Cytokines have been implicated in pancreatic beta-cell destruction leading to type 1 diabetes. In vitro, a combination of gamma-interferon (IFN-gamma) and interleukin-1 (IL-1) stimulate inducible nitric oxide synthase (iNOS) expression in islets, and the resulting increased production of nitric oxide (NO) causes islet cell destruction. Islets contain macrophages, ductal cells, and endothelial cells that, when activated, may mediate islet cell damage by producing either NO themselves or cytokines that then stimulate NO production by beta-cells. The aim of this study was to determine whether beta-cell damage mediated by cytokine-induced NO production is dependent on beta-cell production of NO, or whether NO produced by other cells in the islet is capable of destroying beta-cells. To address this aim, we used transgenic mice expressing a dominant-negative IFN-gamma receptor in beta-cells (RIP-Delta(gamma)R). RIP-Delta(gamma)R islets are resistant to IL-1 + IFN-gamma-induced inhibition of insulin secretion and DNA damage, indicating that beta-cell IFN-gamma responsiveness is required for IL-1 + IFN-gamma-mediated beta-cell damage. Although islets isolated from RIP-Delta(gamma)R mice are resistant to functional damage, these islets produce NO in response to IL-1 + IFN-gamma, but at a lower concentration than that produced by wild-type islets. beta-Cells appear to be the primary cellular source of IL-1 + IFN-gamma-induced iNOS expression in wild-type islets. In contrast, IL-1 + IFN-gamma fail to stimulate iNOS expression by insulin-expressing cells in islets isolated from RIP-DeltagammaR mice. IL-1 + IFN-gamma-induced expression of iNOS was detected in non-beta-cells in both wild-type and RIP-DeltagammaR islets. These findings support the hypothesis that NO must be produced by beta-cells to induce damage. |
| تدمد: | 1939-327X 0012-1797 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::60b4b75fbe9b3a29f1f71a67b5682a19 https://doi.org/10.2337/diabetes.51.2.311 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....60b4b75fbe9b3a29f1f71a67b5682a19 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 1939327X 00121797 |
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