低密度脂蛋白对培养的人肾小球系膜细胞的增殖作用及冬虫夏草对其的影响

Proliferation of cultured human mesangial cells caused by LDL and the adserse effect of Cordyceps

目的：探讨肾小球硬化的发病机理；并发现治疗肾小球硬化的治疗方法。方法：（１）通过测定［３Ｈ］胸腺嘧啶的掺入率，检测体外培养的人肾小球系膜细胞的增殖；（２）对人肾小球系膜细胞进行纯化和培养并对低密度、高密度脂蛋白进行［１２５Ｉ］标记。结果：（１）肾小球系膜细胞选择性结合和摄取［１２５Ｉ］ＬＤＬ，（２）ＬＤＬ刺激系膜细胞增殖且增殖作用具有双向性，（３）冬虫夏草对ＬＤＬ引起的细胞增殖具有抑制作用。结论：ＬＤＬ刺激系膜细胞增殖可能直接参与肾小球硬化的发病，高脂血症对肾脏的损害可能由肾小球系膜细胞介导；抑制系膜细胞增殖可能对肾小球硬化的防治具有一定的可行性。

AIM:To study the pathogenesis of glomerulosclerosis in vitro and find a treatment method of glomerulosclerosis.METHODS:Human glomerular mesangial cells were purified and cultured: Low density lipoprotein(LDL) and high density lipoprotein (HDL) labelled with [ 125 I]; and human mesangial cells (HMC) proliferation measured by counting thymidine incorporation. RESULTS:(1) Cultured HMC uptake [ 125 I]LDL selectively, (2)LDL stimulated HMC proliferation and had a biphasic effect on HMC proliferation, (3)Cordyceps militaris had a strong inhibition on HMC proliferation induced by LDL. CONCLUSIONS: HMC proliferation induced by LDL may directly participate in the pathogenesis of glomerulosclerosis. The deleterious effects of hyperlipidemia on the kidney may be mediated by HMC. Therefore, inhibiting HMC proliferation may be practicable in the treatment of progressive glomerulosclerosis.