非诺贝特和吡格列酮对心肌细胞肿瘤坏死因子-α表达的影响及机制初探

叶平;方红;周新;贺艳丽;刘永学

中国药学杂志 ›› 2004, Vol. 39 ›› Issue (04) : 258-260.

中国药学杂志 ›› 2004, Vol. 39 ›› Issue (04) : 258-260.
论著

非诺贝特和吡格列酮对心肌细胞肿瘤坏死因子-α表达的影响及机制初探

  • 叶平;方红,;周新;贺艳丽,;刘永学
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Effects of fenofibrate and piogilitazone on tumor necrosis factor-α exprssion in neonatal rat cardiac myocytes

  • YE Ping1,FANG Hong1,2,ZHOU Xin2,HE Yan-li1,2,LIU Yong-xue3
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文章历史 +

摘要

目的 观察过氧化体增殖物激活型受体(peroxisome proliferator-activated receptors,PPARs)激活剂——非诺贝特和吡格列酮对新生大鼠心肌细胞肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)表达水平的影响,探讨可能涉及的机制。方法 体外原代培养新生Wistar大鼠心肌细胞,分别给予不同浓度的非诺贝特(PPARα激活剂)或吡格列酮(PPARγ激活剂)刺激,并辅加脂多糖诱导TNF-α表达。采用半定量RT-PCR法检测TNF-αmNNA的表达,ELISA法检测TNF-α的蛋白水平。心肌细胞瞬时转染TNF-α启动子控制的报告基因载体,测定CAT相对活性以反映TNF-α基因的转录活性。结果 与对照组相比,非诺贝特组和吡格列酮组的TNF-αmRNA及蛋白表达水平均明显降低,且呈剂量依赖性。心肌细胞瞬时转染全长TNF-α启动子控制的报告基因质粒(-721/+17),非诺贝特或吡格列酮可降低脂多糖诱导的CAT相对活性,而转染核因子κB(NF-κB)结合位点缺失的TNF-α启动子控制的报告基因质粒(-182/+17),非诺贝特、吡格列酮或脂多糖刺激均未能改变心肌细胞的CAT相对活性。结论 非诺贝特和吡格列酮可显著抑制新生大鼠心肌细胞中脂多糖诱导的TNF-α表达,具有抗炎作用,其机制可能部分通过抑制NF-κ信息通路发挥作用。

Abstract

OBJECTIVE To investigate the effects of peroxisome proliferator-activated receptors (PPARs)--fenofibrate and pioglitazoneon tumor necrosis factor-α (TNF-α) expression in cardiac myocytes of neonatal rat. The possible mechanism of action was explored. METHODS Primary cultures of cardiac myocytes were prepared from 1 - 3 day old Wistar rats, and then the myocytes were exposed to lipopolysac-charide (LPS) and fenofibrate and pioglitazone at different concentrations. RT-PCR and EL1SA were used to measure TNF-α expression in cultured cardiac myocytes. Transient transfection of TNF-α promoter with or without nuclear factor-kappaB (NF-icB) binding site to cardiac myocytes was performed. RESULTS Pretreatment of cardiac myocytes with fenofibrate or pioglitazone inhibited LPS-induced TNF-α mRNA and protein expression in dose-dependent manner. Proportional supression of TNF-α promoter activity was observed when the myocytes were transiently transfected with whole length of TNF-α promoter ( - 721/ +17) after being stimulated with LPS and fenofibrate or pioglitazone, whereas no change of the promoter activity was observed with the transfection of TNF-α reporter with deletion of NF-icB binding site ( - 182/ + 17) . CONCLUSION Fenofibrate and pioglitazone inhibit cardiac TNF-a expression and appear to play a role in anti-inflammation. The mechanism may be partly involved in suppression of NF-κB pathway.

关键词

非诺贝特 / 吡格列酮 / 肿瘤坏死因子-α / 心肌细胞 / 核因子κB

Key words

fenofibrate / pioglitazone / tumor necrosis factor-α / cardiac myocytes / activators / nuclear factor-kappaB

引用本文

导出引用
叶平;方红;周新;贺艳丽;刘永学. 非诺贝特和吡格列酮对心肌细胞肿瘤坏死因子-α表达的影响及机制初探[J]. 中国药学杂志, 2004, 39(04): 258-260
YE Ping;FNG Hong;ZHOU Xin;HE Yn-li;LIU Yong-xue. Effects of fenofibrate and piogilitazone on tumor necrosis factor-α exprssion in neonatal rat cardiac myocytes [J]. Chinese Pharmaceutical Journal, 2004, 39(04): 258-260

参考文献

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基金

国家自然科学基金项目(30270551);军队“十五”课题基金(02M012)

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