Cell Biological Study on Abnormal Proteoglycan Synthesis in Vascular Cells Exposed to Heavy Metals

Cell Biological Study on Abnormal Proteoglycan Synthesis in Vascular Cells Exposed to Heavy Metals
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重金属作用下血管细胞蛋白多糖合成异常的细胞生物学研究

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发表时间:
2004
期刊:
影响因子:
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通讯作者:
Y. Fujiwara
Y. Fujiwara
中科院分区:
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作者:
Y. Fujiwara

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铅和镉是有毒重金属,流行病学和实验研究表明它们可能是动脉粥样硬化的危险因素。由于过量的细胞外基质(包括蛋白多糖)的积累改变了动脉粥样硬化血管壁的组成和结构,因此已经使用细胞培养系统研究了铅和镉对血管细胞中蛋白多糖合成的影响。得到以下结果:铅不会破坏内皮细胞层,但会显着抑制受损细胞层的修复,这是由于抑制血管内皮细胞中基底膜聚糖(一种大型硫酸乙酰肝素蛋白聚糖)的合成而导致对内源性碱性成纤维细胞生长因子的反应降低所致。铅仅在高细胞密度下选择性抑制血管平滑肌细胞中多功能蛋白聚糖(一种大型硫酸软骨素蛋白聚糖)的合成。镉仅在低细胞密度的血管平滑肌细胞中诱导双聚糖和核心蛋白聚糖(小型硫酸皮肤素蛋白聚糖)的合成,同时抑制其他蛋白聚糖分子的合成。因此表明铅和镉可能通过破坏血管细胞中蛋白多糖合成的调节来影响动脉粥样硬化的发展过程。
Lead and cadmium are toxic heavy metals that have been shown to be possible risk factors of atherosclerosis in epidemiological and experimental studies. Since excess extracellular matrix, including proteoglycans, accumulates changing the composition and the structure in the atherosclerotic vascular wall, the effects of lead and cadmium on the proteoglycan synthesis in vascular cells have been studied using a cell culture system. The following results were obtained: Lead does not destroy endothelial cell layers but markedly inhibits the repair of the injured cell layers, which results from a lower response to endogenous basic fibroblast growth factor caused by inhibition of the synthesis of perlecan, a large heparan sulfate proteoglycan, in vascular endothelial cells. Lead selectively inhibits the synthesis of versican, a large chondroitin sulfate proteoglycan, in vascular smooth muscle cells only at a high cell density. Cadmium induces the synthesis of biglycan and decorin, small dermatan sulfate proteoglycans, in vascular smooth muscle cells only at a low cell density, while inhibiting the synthesis of other proteoglycan molecules. It is therefore suggested that lead and cadmium may influence the developmental process of atherosclerosis through disrupting the regulation of proteoglycan synthesis in vascular cells.
不溶性低密度脂蛋白-蛋白聚糖复合物可增强巨噬细胞中胆固醇酯的积累。
DOI: --
发表时间: 1985
期刊: The American journal of pathology
影响因子: --
作者:
Salisbury,BG;Falcone,DJ;Minick,CR
通讯作者: Minick,CR
血小板源性生长因子和转化生长因子-β1 对猴动脉平滑肌细胞双糖链蛋白聚糖和核心蛋白聚糖的合成有不同的影响。
DOI: 10.1161/01.atv.13.7.1026
发表时间: 1993
期刊: Arteriosclerosis and thrombosis : a journal of vascular biology
影响因子: --
作者:
Schönherr,E;Järveläinen,HT;Kinsella,MG;Sandell,LJ;Wight,TN
通讯作者: Wight,TN
DOI: 10.1016/s0021-9258(19)47419-x
发表时间: 1991-09
期刊: The Journal of biological chemistry
影响因子: --
作者:
E. Schönherr;H. Järveläinen;L. Sandell;T. Wight
通讯作者: E. Schönherr;H. Järveläinen;L. Sandell;T. Wight
汞和铅在体外诱导主动脉平滑肌收缩。
DOI: --
发表时间: 1986
影响因子: --
作者:
Tomera,JF;Harakal,C
通讯作者: Harakal,C
DOI: --
发表时间: 1989
期刊: The Journal of biological chemistry
影响因子: --
作者:
Saku,T;Furthmayr,H
通讯作者: Furthmayr,H