丹参素对CD11b、P-selectin、ICAM-1、VCAM-1、E-selectin表达的影响

目的　考察丹参素对血小板、白细胞和血管内皮细胞表达细胞粘附分子CD11b、P selectin、ICAM 1、VCAM 1、E selectin的影响 ,以期探明其抗血栓形成作用的机制。方法　用流式细胞仪测定由TNFα、fMLP和凝血酶诱导细胞表面细胞粘附分子的表达。结果　人粒细胞受到fMLP刺激后 ,细胞表面CD11b表达明显增加。丹参素与粒细胞预孵30min后 ,则剂量依赖性地抑制CD11b的表达。血小板与凝血酶 (1× 10 3U·L-1)共孵 2 0min ,可明显增加血小板表面P selectin的表达。丹参素 (10 0～ 30 0mg·L-1)与血小板预孵 30min ,对凝血酶诱导的血小板表面P selectin的表达未见明显抑制作用。人脐静脉内皮细胞 (HUVEC)经TNFα处理后 ,明显增加细胞表面ICAM 1、VCAM 1和E selectin的表达 ,不同浓度的丹参素与HUVEC预孵 2h ,对TNFα诱导HUVEC表面ICAM 1的表达未见明显抑制作用 ,对TNFα诱导的VCAM 1、E selectin表达则可产生明显的抑制作用。结论　丹参素可抑制血管内皮细胞和粒细胞表达细胞粘附分子。这可能是丹参素发挥抗血栓形成作用的机制之一。

Effects of danshensuan on expression of CD11b, P-selectin, ICAM 1, VCAM-1 and E-slectin in vitro

AIM To study the action of danshengsuan (Dan) on expression of CD11b, P selectin, ICAM 1, VCAM 1 and E slectin in vitro. METHODS Adheshion molecule expression on the cell surface was measured by flow cytometry. RESULTS Treatment of neutrophils with N fomyl met leu phe(fMLP), resulted in a marked increase of CD11b expression. Dan inhibited the effects of fMLP in a concentration dependent manner. Dan did not inhibit the increase of P selectin expression of thrombin actived human blood platelets. Treatment of cultured human umbilical vein endothelial cells (HUVEC) with TNF α resulted in an increase of ICAM 1, VCAM 1 and E slectin. Dan inhibited the increase of VCAM 1 and E slectin expression, not ICAM 1. CONCLUSION Dan inhibited expression of adhesion molecules CD11b, ICAM 1, VCAM 1 in human neutrophils and HUVEC.