枳实提取物及其药效组分对OX—LDL损伤的人脐静脉内皮细胞ICAM-1表达和NO释放的影响

目的：研究枳实提取物及其药效组分橙皮苷和新橙皮苷对氧化低密度脂蛋白（oxidized lowd ensity lipoprotein，Ox—LDL）损伤的人脐静脉内皮细胞（human umbilical vein endothelial cells line，HUVEC）细胞间黏附分子-1（intercellular adhesion molecule-1，ICAM-1）表达和一氧化氮（nitric oxide，NO）释放的影响。方法：体外培养HUVEC，50μg／mLOX—LDL制造HUVEC损伤模型。以MTS染色法检测细胞毒性确定用药浓度。细胞ELISA法测定细胞表面ICAM-1的含量，试剂盒测定细胞培养上清液中NO含量。结果：①枳实提取物小于等于2mg／mL时，橙皮苷浓度小于等于0．03125mg／mL时，新橙皮苷浓度小于等于0．25mg／mL时，HUVEC存活率分别大于80％。②2．0mg／mL和1．0mg／mL两个浓度的枳实提取物、15．625μg／mL的橙皮苷和0．2500mg／mL新橙皮苷对OX—LDL诱导的HUVEC的ICAM-1表达有显著抑制作用。③2．0mg／mL枳实提取物显著提高OX—LDL诱导的HUVEC和正常HUVEC培养液中的NO含量；7．813ixg／mL、15．625μg／mL和31．250μg／mL 3个浓度的橙皮苷能显著提高OX—LDL诱导的HUVEC培养液中的NO含量，31．250μg／mL的橙皮苷能促进正常HUVEC的NO释放；0．2500mg／mL和0．1250mg／mL 2个浓度的新橙皮苷能显著提高OX—LDL诱导的HUVEC培养液中的NO含量。结论：枳实提取物及其药效组分橙皮苷、新橙皮苷能抑制Ox-LDL诱导的HUVEC的ICAM-1表达，促进Ox-LDL诱导的HUVEC的NO释放。

Effects on icam-1 Expression and Releasing of Huvec Induced by ox-ldl of Aurantii Frucms Immaturus Extract and its Active Components

Objective： To investigate the effect of HUVEC treated by ox-LDL of Aurantii Fructus Immaturus extract, hesperidin and neohesperidint on ICAM-1 expression and NO releasing. Methods： HUVEC was cultured in vitro. HUVEC was induced by 50 μg/mL ox-LDL to establish injury model. Cytotoxicity was studied by MTS colorimetry to determine the highest contents of samples in this test. Effect of ICAM-1 expression was studied by cell-ELISA. NO releasing was studied by nitrate/nitrite colorimetric assay kit. Results： ①HUVEC viability was greater than 80 % when 2 mg/mL Aurantii Fructus Immaturus extract, 0.03125 mg/mL hesperidin and 0.25 mg/mL neohesperidin was incubated with culture medium respectively. ②2.0 mg/mL and 1.0 mg/mL Aurantii Fructus Immaturus extract, 15.625 μg/mL hesperidin and 0.2500 mg/mL neohesperidin had significant inhibitory effect on ICAM-1 expression of HUVEC induced by ox-LDL. ③2.0 mg/mL Aurantii Fructus Immaturus extract could increase the contents of NO in supernatant of normal HUVEC and HUVEC induced by ox-LDL significantly. 7.813 μg/mL, 15.625 μg/mL and 31.250 μg/mL hesperidin can increase the content of NO in supernatant of HUVEC induced by ox-LDL significantly. 31.250μg/mL hesperidin could increase the content of NO in supernatant of normal HUVEC significantly. 0.2500 mg/mL and 0.1250 mg/mL neohesperidin could increase the content of NO in supernatant of HUVEC induced by ox-LDL significantly. Conclusions： Aurantii Fructus Immaturus extract, hesperidin and neohesperidin can inhibit ICAM-1 ex-pression and promote NO releasing of HUVEC induced by ox-LDL.