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Preventive effects of pioglitazone and its mechanisms in the non-obese diabetic mouse
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF DIABETES
- Issue:
- 4
- DOI:
- 10.3321/j.issn:1006-6187.2007.04.016
- Key Word:
- NOD鼠;吡格列酮;糖尿病,1型;胰岛炎;辅助性T细胞
Abstract： 目的 探讨吡格列酮(PIO)对NOD鼠糖尿病发病率和胰岛炎的影响及其作用机制.方法 4周龄NOD雌鼠随机分为2组,分别摄食0.02% PIO混合饲料(PIO,n=26)和普通饲料(对照组,n=25),观察30周龄时的糖尿病累积发病率.各组另取12周龄未患病NOD鼠(n=15)胰腺H-E染色观察胰岛炎;ELISA法测血清、脾细胞培养上清干扰素γ(IFN-γ)和白细胞介素4(IL-4)水平;RT-PCR检测脾脏IL-4、IFN-γmRNA的表达水平.结果 30周龄时,PIO组发病率较对照组明显降低(P＜0.05).12周龄时,PIO组胰岛炎平均积分低于对照组(P＜0.05);血清、脾上清IL-4水平,脾脏IL-4mRNA表达水平显著性高于对照组(P＜0.05);PIO血清、脾上清IL-4/IFN-γ比值水平高于对照组(P＜0.05).结论 PIO通过上调IL-4水平,促使免疫平衡向Th2方向偏移,从而使NOD鼠胰岛炎减轻,而在一定程度上预防和延缓NOD鼠糖尿病的发生.
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