高渗盐水治疗对失血性休克鼠网状内皮细胞功能和易感染性的影响

Effects of Hypertonic Saline Treatment on the Function and Susceptibility to Sepsis of Reticuloendothelial System in Mice with Hemorrhagic Shock

目的 探讨高渗盐水治疗对失血性休克鼠网状内皮细胞功能和易感染性的影响。方法 心脏穿刺抽取小鼠总血量的 4 0 % ,制成失血性休克动物模型 2h后 ,分别经尾静脉输注贮血和生理盐水或 7.5 %NaCl治疗 ,观察两种方法治疗后再行盲肠结扎穿刺 (CLP)鼠的存活率。以碳粒廓清实验和肝、脾巨噬细胞摄取碳粒量检测网状内皮细胞的吞噬功能。同时经体外实验观察不同渗透压对腹腔巨噬细胞吞噬中性红功能的影响。结果 高渗盐水治疗后 2 4h行CLP鼠的存活率为 70 % ,而生理盐水治疗组则全部死亡。休克后 3h高渗盐水治疗组网状内皮细胞对碳粒廓清指数α以及肝脏巨噬细胞摄取碳粒量 (5 .6 1± 0 .4 2 ,0 .5 9± 0 .19)均显著高于生理盐水治疗组(4 .15± 0 .6 2 ,0 .4 2± 0 .16 ) ,P<0 .0 1。体外实验 ,在 4 0mmol/L内额外升高培养液的渗透压 ,对小鼠腹腔巨噬细胞吞噬中性红的量无显著影响。结论 高渗盐水治疗可以间接改善失血性休克鼠网状内皮细胞吞噬功能并降低感染的易感性。

Objective To investigate the effects of hypertonic saline (HTS) treatment on the function and susceptibility to sepsis of reticuloendothelial system (RES) in mice with hemorrhagic shock. Methods Forty percent of total blood volume of male Balb/c mice was withdrawn by cardiac puncture. Two hours later, the mice were treated with blood infusion and normal saline (10 ml/kg) or 7.5% NaCl (10 ml/kg).The survival rate of the mice was observed after cecal ligation and puncture (CLP). The phagocytosis function of the RES was measured by carbon clearance rate(α) and carbon amount ingested by the macrophages of liver and spleen. In vitro, the peritoneal phagocyte function in solutions of different osmotic pressor was measured by assaying neutral red amount taken in. Results The survival rate after CLP in HTS treated group was 70%, whereas all the mice in the normal saline group died. At the third hour after hemorrhagic shock, the RES carbon clearance rate(α) and carbon amount ingested by the macrophages of liver in the HTS treated mice were 5.61±0.42 and 0.59±0.19 respectively, significantly higher than those in the normal saline treated mice (4.15±0.62, 0.42±0.16). In vitro, hyperosmolarity below 40 mmol/L had no significant effects on the phagocytosis activity of peritoneal macrophages in mice.Conclusion Treating hemorrhagic shock with HTS can decrease the susceptibility to sepsis and improve the RES phagocytosis function indirectly.