Objective:To investigate the protective effect of salidroside on acute lung injury or acute respiratory distress syndrome (ALI/ARDS) in rats. Methods:A total of 50 rats were randomly divided into five groups:the normal control group,the model group, salidroside high,medium and low (8.0,4.0,2.0 mg·kg-1) dose groups with 10 ones in each. ALI/ARDS model was prepared by tail vein injection of oleic acid (0.1 ml·kg-1). The administration route was intraperitoneal injection, once daily for continuous 3 days. At 24 h after the model preparation was successful,1.0 ml blood samples were collected through carotid artery for the blood gas analysis. The lung wet/dry weight ratio,arterial oxygen partial pressure and HE staining lung tissue pathology were detected and the expression of HMGB1 and KRT-14 in the blood of rats was detected after the drug was administered for 3 days. Results:The expres-sion of HMGB1 and KRT-14 in each salidroside was lower than that in the model group,and the differences were statistically significant between the medium and high dose groups and the model group(P<0.05). The dose and efficacy of salidroside were positively corre-lated,and the differences were statistically significant between the medium and high dose groups and the low dose group(P<0.05). The oxygen partial pressure of each salidroside group was higher than that of the model group, and the lung wet/dry weight ratio was lower than that of the model group,and the difference was statistically significant between the medium and high dose groups and the model group(P<0.05). The dose and efficacy of salidroside were positively correlated,and the difference was statistically significant between the medium and high dose groups and the low dose group(P<0.05). Compared with the model group,the lung pathological changes of each salidroside group were improved. Conclusion:Salidroside can reduce the expression of inflammatory factors HMGB1 and KRT-14 in blood,reduce pulmonary edema and increase oxygen partial pressure in ALI/ARDS rats, which shows obvious thera-peutic effect on ALI/ARDS.%目的:探讨红景天苷注射液对急性肺损伤(ALI)/急性呼吸窘迫综合征(ARDS)大鼠的保护作用.方法:50只大鼠随机分为5组:正常对照组,模型对照组,红景天苷高、中、低(8.0,4.0,2.0 mg·kg-1)剂量组,每组10只.采用油酸0.1 ml· kg-1经尾静脉注射制备ALI/ARDS模型.腹腔注射给药,qd,连续给药3 d.模型制备成功后24 h经颈动脉采集血样1.0 ml行血气分析.给药第3天检测肺湿干质量比、动脉氧分压、HE染色肺组织病理,并采用ELISE法检测大鼠血液中高迁移率族蛋白-1(HMGB1)和角蛋白-14(KRT-14)的表达.结果:红景天苷各剂量组的HMGB1和KRT-14表达均低于模型对照组,中、高剂量组与模型对照组相比差异有统计学意义(P<0.05);红景天苷的剂量与药效呈正相关,中、高剂量组与低剂量相比差异有统计学意义(P<0.05).红景天苷各剂量组的动脉氧分压高于模型对照组,肺湿干质量比低于模型对照组,中、高剂量组与模型对照组相比差异有统计学意义(P<0.05);红景天苷的剂量与药效呈正相关,中、高剂量组与低剂量相比差异有统计学意义(P<0.05).红景天苷各剂量组的肺组织病理与模型对照组相比有所改善.结论:红景天苷能减轻ALI/ARDS大鼠血液中炎症因子HMGB1和KRT-14的表达,减轻肺水肿,提高氧分压,对ALI/ARDS大鼠具有明显的治疗作用.
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