【摘要】 目的:探讨12-脂氧化酶的活性代谢产物12(S)-HETE对系膜细胞和肾小球内p27kip1表达的影响。方法:12(S)-HETE刺激的系膜细胞和皮下包埋的微型渗透泵长期持续恒速注入12(S)-HETE刺激的大鼠提取的肾小球来观察p27kip1的表达。采用总蛋白量/细胞数的比值作为细胞肥大的评价指标,利用RT-PCR和Western blot方法检测p27kip1mRNA和蛋白的表达。结果:12(S)-HETE刺激能够直接诱导系膜细胞发生肥大。12(S)-HETE刺激的系膜细胞内p27kip1mRNA水平没有变化,而p27kip1蛋白的表达明显增加。然而,在微型渗透泵持续恒速注入12(S)-HETE刺激的大鼠提取的肾小球内p27kip1mRNA水平和蛋白的表达均增加。结论:12(S)-HETE能够通过促进p27kip1的高表达而参与细胞周期的调控,是引起肾小球系膜细胞和肾小球肥大、衰老的重要原因之一。更多还原

【Abstract】 Objective:To investigate the effect of 12(S)-HETE on the p27kip1 expression in mesangial cells and glomeruli.Methods:Mesangial cells were exposed to 12(S)-HETE.12(S)-HETE was infused to rats by osmotic mini-pump.Total protein content measurement for cell hypertrophy,RT-PCR for mRNA expression and Western blot for protein expression were performed respectively.Results:12(S)-HETE stimulation induced mesangial cell hypertrophy and p27kip1 protein expression,but not p27kip1 mRNA expression.Furthermore,p27kip1 mRNA and protein expression in the glomeruli were significantly increased by 12(S)-HETE stimulation using osmotic mini-pump.Conclusion:12(S)-HETE plays an important role in the pathogenesis of glomerular cell hypertrophy and senescence through upregulation of p27kip1 expression.更多还原