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Resveratrol prevents interleukin-1 β-induced dysfunction of pancreatic β-cells
  • 时间:0
  • 分类:Q78[生物学—分子生物学] TS262.6[轻工技术与工程—发酵工程;轻工技术与工程—食品科学与工程]
  • 作者机构:[1]Key Laboratory of Human Functional Genomics of Jiangsu Province,Clinical Diabetes Centre of Jiangsu Province,Nanjing Medical University,Nanjing 210029,Jiangsu Province,China, [2]Department of Endocrinology,Jiangsu Diabetes Center,the First Affiliated Hospital,Nanjing Medical University,Nanjing2 10029,Jiangsu Province,China, [3]Atherosclerosis Research Centre,Nanjing Medical University,Nanjing 210029,Jiangsu Province,China
  • 相关基金:supported by grants from the National Natural Science Foundation of China(No.30370676 and No.30771041);; the Special Funds for Major State Basic Research Program of China(973Program No.2006CB503908)
中文摘要:

客观 Interleukin-1 尾(IL-1 尾) 在类型 1 和类型 2 糖尿病 mellitus 的发展起一个重要作用。Resveratrol,多酚,被知道在 vitro 有大量药理学性质。在这研究,我们在 IL-1 尾 - 上检验了 resveratrol 的效果导致的尾 - 房间机能障碍。我们首先在氮的氧化物上评估了 resveratrol 的效果的方法(没有) 在用 Griess 方法与 IL-1 尾刺激的 RINm5F 房间的形成。下次,我们执行了短暂 transfection 和记者试金测量 peroxisome 的 transcriptional 活动激活 proliferator 的受体 -- 纬(PPAR- 纬) 。我们也使用了西方的弄污的分析在可诱导的氮的氧化物 synthase (iNOS ) 上估计 resveratrol 的效果表示和原子因素 -- 到在房间的原子核的 translocation 与 IL-1 尾对待的魏 B (NF-魏 B ) 。另外,我们用 electrophoretic 活动性移动试金(EMSA ) 估计了 NF-魏 B 的 transcriptional 活动。最后,我们在刚孤立的老鼠在刺激葡萄糖的胰岛素分泌物的 IL-1 尾鈥搃n duced 抑制上评估了 resveratrol 的效果胰腺的小岛。结果 Resveratrol 显著地压制了导致的 IL-1 尾 - 没有生产,一发现那与 iNOS mRNA 和蛋白质的减少的层次相关很好。resveratrol 由禁止了 iNOS 基因表示的分子的机制看起来包含增加的 PPAR- 纬活动,它导致了 NF-魏 B 激活的抑制。进一步的分析证明 resveratrol 能阻止 IL-1 尾 - 在老鼠小岛的刺激葡萄糖的胰岛素分泌物的导致的抑制。在这研究的结论,我们证明 resveratrol 能免于房间机能障碍由 IL-1 尾引起了的胰腺的尾 - 。

英文摘要:

Objective:Interleukin-1β(IL-1β)plays an important role in the development of type 1 and type 2 diabetes mellitus.Resveratrol,a polyphenol,is known to have a wide range of pharmacological properties in vitro.In this research,we examined the effects of resveratrol on IL-1β-inducedβ-cell dysfunction.Methods:We first evaluated the effect of resveratrol on nitric oxide(NO)formation in RINm5F cells stimulated with IL-1βusing the Griess method.Next,we performed transient transfection and reporter assays to measure the transcriptional activity of peroxisome proliferator-activated receptor-γ(PPAR-γ).We also used Western blotting analysis to assess the effect of resveratrol on inducible nitric oxide synthase(iNOS)expression and nuclear factor-κB(NF-κB)translocation to the nuclei in cells treated with IL-1β.In addition,we assessed the transcriptional activity of NF-κB using an electrophoretic mobility shift assay(EMSA).Finally,we evaluated the effect of resveratrol on IL-1β-induced inhibition of glucose-stimulated insulin secretion in freshly isolated rat pancreatic islets.Results:Resveratrol significantly suppressed IL-1β-induced NO production,a finding that correlated well with reduced levels of iNOS mRNA and protein.The molecular mechanism by which resveratrol inhibited iNOS gene expression appeared to involve increased PPAR-γactivity,which resulted in the inhibition of NF-κB activation.Further analysis showed that resveratrol could prevent IL-1β-induced inhibition of glucose-stimulated insulin secretion in rat islets.Conclusion:In this study,we demonstrated that resveratrol could protect against pancreaticβ-cell dysfunction caused by IL-1β.

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