脑脉通联合溶栓对脑缺血大鼠肺胃损伤的保护作用

目的:观察脑脉通联合溶栓治疗对大鼠脑缺血损伤肺胃组织的保护作用。方法:大鼠随机分为假手术组、模型组、尿激酶溶栓组(简称溶栓组)、脑脉通组、脑脉通加尿激酶溶栓组(简称联合组)。自体血栓结合线栓阻塞大鼠大脑中动脉制备血栓栓塞性脑缺血动物模型。大鼠分别于缺血后3、6和9h经导管进行区域动脉溶栓。动脉给药后24h,观察大鼠死亡率、颅内和胃出血率、脑组织和肺及胃病理损伤,测定脑梗死面积和肺含水量变化。结果:脑缺血损伤后大鼠死亡率、颅内和胃出血率增高,脑梗死面积增大,脑组织和肺及胃病理损伤明显,肺含水量增加;脑脉通和联合组大鼠死亡率、颅内和胃出血率降低,溶栓和联合组可减轻大鼠脑组织和肺及胃病理损伤,减小脑梗死面积,降低肺含水量;缺血9h脑、肺和胃病理损伤较3h明显,脑梗死面积增大,肺含水量增加;联合组9h病理损伤较溶栓组轻,脑梗死面积减小,肺含水量减少。结论:脑缺血损伤可引起大鼠胃和肺组织病理损伤,且随缺血时间延长呈加重趋势;溶栓治疗可引起颅内和胃出血,早期溶栓对脑和肺及胃组织损伤有明显保护作用;脑脉通联合溶栓可降低大鼠死亡率和胃出血率,对不同时间脑缺血大鼠肺和胃组织损伤均可发挥保护作用。

Effects of Naomaitong and thrombolysis on injuries of lung and stomach in rats with cerebral ischemia

Objective: To study the protective effects of Naomaitong, a compound traditional Chinese herbal medicine, used together with thrombolysis therapy, on injuries of the lung and stomach in rats with cerebral ischemia.Methods: Rats were randomly divided into sham-operated group, untreated group, urokinase group (thrombolysis group), Naomaitong group, thrombolysis plus Naomaitong group. Cerebral ischemia was induced in rats by autonomous blood blot and inserted nylon thread. Rats were administrated with thrombolysis therapy through artery 3, 6 and 9 h after cerebral ischemia respectively. Twenty-four hours after the administration, mortality of the rats, and the brain and stomach hemorrhage ratios, as well as the pathological changes of the brain, lung and stomach were observed, and then cerebral infarct size (CIS) and lung water ratio (LWR) were measured.Results: Compared with the sham-operated group, the rat mortality, and the brain and stomach hemorrhage ratios increased, the CIS enlarged, pathological changes of the brain, lung and stomach appeared obvious, and the LWR increased. Naomaitong plus thrombolysis treatment improved the changes above significantly. In the untreated rats with cerebral ischemia, injuries of the brain, lung and stomach were aggravated, the CIS enlarged and the LWR increased in the 9 h group as compared with those in the 3 h group. In the thrombolysis plus Naomaitong group, the pathological changes were improved, the CIS diminished and the LWR reduced. Conclusions: Injuries of the lung and stomach can be caused by cerebral ischemia, and the impairment was exacerbated following the prolongation of the ischemia. Thrombolysis therapy can cause brain and stomach hemorrhage. Thrombolysis therapy used early can perform protection against the injuries. Naomaitong, used together with thrombolysis, can reduce the mortality,the brain and stomach hemorrhage ratios, and perform protective effects on the injuries of cerebral ischemia.