丹参对内毒素血症早期中性粒细胞-内皮细胞粘附作用的影响

Effects of Radix Salviae Miltiorrhizae on the PMN-EC Adhesion in vitro at the Early Stage of Endotoxemia

目的 研究丹参对内毒素血症早期中性粒细胞 (PMN)与内皮细胞 (EC)粘附作用的影响 ,探讨其抗粘附作用的机制。方法 建立兔内毒素血症模型 ,其中丹参治疗组分别于造模后即刻和 2 4 h后静脉注射丹参注射液 (2 m l/ kg) ,检测造模后即刻、2、4、8、16、2 4、4 8h PMN- EC粘附率、PMN表面粘附分子 CD11a/ CD18及 CD11b/CD18的值 ,并测定各时点血浆 TNF- α水平。结果 造模后即刻内毒素血症组与丹参治疗组粘附分子 CD11a/CD18、CD11b/ CD18及粘附率均升高 ,内毒素血症组于造模后 4 h达高峰 ,丹参治疗组各时点的 CD11a/ CD18、CD11b/ CD18值及 PMN- EC粘附率均低于前者 (P<0 .0 5 )。内毒素血症组于造模后 2 h TNF- α开始升高 ,8h达高峰 ,4 8h仍高于正常 ;丹参治疗组各时点的 TNF- α值均低于前者 (P<0 .0 5 )。结论 丹参能降低内毒素血症早期PMN粘附分子 CD11a/ CD18、CD11b/ CD18的表达及血浆 TNF- α的水平 ,进而抑制 PMN- EC粘附 ,改善微循环及减轻组织病理损伤。

Objective To evaluate the effects of Radix Salviae Miltiorrhizae(RSM) on the PMN-EC adhesion in vitro at the early stage of endotoxemia, and to probe into the mechanism there in involved. Methods The rabbit endotoxemia model was made, and one group was treated with RSM injection(2 ml/kg) instantly and 24 h after the modeling of endotoxemia. PMN-EC adhesion rate, adhesion molecule (CD11a/CD18 and CD11b/CD18) and TNF-α level were measured instantly, 2 h, 4 h, 8 h, 16 h, 24 h and 48 h after endotoxemia modeling. Results It was found that after the modeling of endotoxemia, the levels of CD11a/CD18, CD11b/CD18 and PMN-EC adhesion rate instantly increased in the endotoxemia group and RSM group, they went up to the peak at 4 h in the endotoxemia group, and at 2 h, 4 h, 8 h, 16 h, 24 h and 48 h, they were markedly lower in the RSM group than in the endotoxemia group (P<0.05). The TNF-α level in the endotoxemia group began to increase 2 h after the modeling and reached to the peak at 8 h, with its level still higher than normal at 48 h, while the RSM group had lower level of TNF-α at all time-points(P<0.05). Conclusion The data from this animal experiment indicate that Radix Salviae Miltiorrhizae can decrease PMN-EC adhesion rate and the levels of CD11a/CD18, CD11b/CD18 and TNF-α in case of endotoxemia so as to improve the microcirculation.