中文摘要：

目的：观察地骨皮中有效成分对高糖刺激的肾小球系膜细胞的增殖以及细胞外基质分泌的影响，研究其对糖尿病肾病的保护机制。方法体外培养肾小球系膜细胞，分为高糖模型组（葡萄糖浓度为30 mmol／L），空白对照组（葡萄糖浓度为5．5 mmol／L），甜菜碱、山奈酚5个浓度剂量组（0．01、0．1、1、10、100μmol／L），用 MTT 法观察系膜细胞增殖情况，ELISA 法观察细胞外基质分泌情况。结果与高糖模型组比较，不同剂量甜菜碱组和山奈酚组，对高糖致肾小球系膜细胞增殖有不同程度的抑制。甜菜碱、山奈酚均能抑制细胞外基质的分泌，与高糖模型组比较有显著性差异（P ＜0．05～0．01）。结论地骨皮中有效成分甜菜碱和山奈酚均具有抑制高糖刺激下系膜细胞增殖以及细胞外基质分泌的作用，推测地骨皮中有效成分具有治疗糖尿病肾病的作用。

英文摘要：

OBJECTIVE To observe the effect of active components from Lycii cortex on the proliferation of high glucose？in-duced glomerular mesangial cells GMCs and the secretion of extracellular matrix ECM.To investigate the protective mechanism of diabetic nephropathy.METHODS GMCs were cultured and divided into high glucose groupfinal glucose con-centration of 30 mmol/Lblank groupfinal glucose concentration of 5.5 mmol/Lbetaine and kaempferol groups of 5 dif-ferent concentrations of 0.010.1110100 μmol/L.The proliferation of high glucose？induced GMCs were observed by MTT method and secretion of ECM was detected by ELISA assay.RESULTS Different doses of betaine and kaempferol inhib-ited the proliferation of GMCsand decreased the content of ECMcompared with high glucose group P〈0.05 ~ 0.01. CONCLUSION Betaine and kaempferol can protect the high glucose？induced GMCs through inhibiting the proliferation of GMCs and decreasing the content of ECM.