乌司他丁对失血性休克大鼠回肠黏膜细胞凋亡的影响

目的 探讨乌司他丁对失血性休克大鼠回肠黏膜细胞凋亡的影响。方法 采用前瞻对照动物研究，用改良Chaudry方法制备大鼠失血性休克模型，60min后回输血液和生理盐水进行复苏，部分加用乌司他丁治疗。检测不同时间点血清肿瘤坏死因子-α（TNF-α）、丙二醛（MDA）含量和回肠黏膜细胞Bax、Bcl-2、caspase3蛋白的表达水平。结果 大鼠失血性休克及复苏后血清TNF-α、MDA含量以及回肠黏膜细胞Bax、caspase3蛋白的表达较正常对照组均明显升高，Bcl-2明显降低。复苏后血清TNF-α含量下降，MDA含量升高；回肠黏膜细胞Bax、caspase3蛋白的表达均明显下降，Bcl-2蛋白明显升高；乌司他丁复苏组上述指标的恢复程度较生理盐水复苏组为好。结论 乌司他丁可抑制失血性休克大鼠回肠黏膜细胞的凋亡，对失血性休克大鼠起保护作用。

Effect of ulinastatin on apoptosis in ileal mucosa of rats with hemorrhagic shock

OBJECTIVE: To investigate the effect of ulinastatin on apoptosis in ileal mucosa of rats with hemorrhagic shock. METHODS: A prospective, controlled animal study was performed. The rat model of hemorrhagic shock was replicated according to method described by Chaudry. After 60 minutes period of bleeding, rats were resuscitated by transfusion of shed blood and normal saline. A part of the animals were additionally treated with ulinastatin. The expression of tumor necrosis factor-alpha (TNF-alpha), malondialdehyde (MDA) content in serum, and expression of Bax, Bcl-2, caspase 3 protein in ileal mucosa were determined at different time points after reperfusion. RESULTS: Compared with the normal saline group, the expression levels of TNF-alpha, MDA content in serum, Bax and caspase 3 protein in ileal mucosa during hemorrhagic shock after resuscitation were significantly increased, while Bcl-2 protein was markedly decreased. After fluid resuscitation, obvious increase in MDA, Bcl-2 protein, significant decrease in the level of TNF-alpha, the expression of Bax and caspase 3 protein in ileal mucosa were observed in the ulinastatin group compared with normal saline group. CONCLUSION: Ulinastatin has protective effect on rats with hemorrhagic shock by suppressing the apoptosis in ileal mucosa.