【摘要】 目的:观察PPARα、γ配体对巨噬细胞、泡沫细胞细胞外基质金属蛋白酶诱导因子(EMMPR IN)表达的影响。方法:体外诱导THP-1单核细胞转化为巨噬细胞、泡沫细胞,分别加入PPARα配体氯贝特(c lofibrate)、PPARγ配体吡格列酮(p ioglitazone)共同培养,应用Real-tim e RT-PCR和W estern b lotting测定巨噬细胞、泡沫细胞中EMMPR IN基因和蛋白表达,ELISA测定细胞培养上清液MMP-9浓度,Zymgraphy法测定MMP-9活性。结果:氯贝特和吡格列酮均能显著抑制巨噬细胞和泡沫细胞EMMPR IN的表达,此抑制作用与PPARα、γ配体抑制MMP-9分泌及活性的趋势一致。结论:PPARα、γ配体均可抑制巨噬细胞、泡沫细胞EMMPR IN的表达,下调EMMPR IN可能是PPAR s配体抑制粥样斑块局部MMPs产生的机制之一。更多还原

【Abstract】 AIM: To investigate the role of PPAR α or γ ligands in regulating the expression of extracellular matrix metalloproteinase inducer(EMMPRIN).METHODS: THP-1 monocytes were induced into macrophages and foam cells in vitro then interfered with clofibrate and pioglitazone.The cells and supernatant were collected after 24 h,respectively.EMMPRIN gene and its protein were assessed by real-time PCR and Western blotting in different interferences.The concentration of matrix metalloproteinases(MMP-9) was measured with ELISA method and the activity of MMP-9 was detected with gelatin zymography.RESULTS: Two known PPAR α or γ ligands,colfibrate and pioglitzaone,were found,both of which inhibited EMMPRIN expression in macrophages and foam cells.The inhibition was correspondent to the secretion and activity of MMP-9 simultaneously.CONCLUSION: Both PPAR α and γ ligands inhibit EMMPRIN expression,which may account for their effect on inhibition of MMPs.更多还原