Background The traditional Chinese medicine injury, but the mechanism of its action is not we protective role of Tongxinluo. Tongxinluo can protect myocardium against documented. We examined the involvement schaemia/r...Background The traditional Chinese medicine injury, but the mechanism of its action is not we protective role of Tongxinluo. Tongxinluo can protect myocardium against documented. We examined the involvement schaemia/reperfusion of nitric oxide in the Methods Miniswine were randomized to four groups of seven： sham, control, Tongxinluo and Tongxinluo coadministration with a nitric oxide synthase inhibitor N^ωnitro-L-arginine （L-NNA, 10 mg/kg i.v.）. Three hours after administration of Tongxinluo, the animals were anaesthetised and the left anterior descending coronary artery ligated and maintained in situ for 90 minutes followed by 3 hours of reperfusion before death. Area of no reflow and necrosis and risk region were determined pathologically by planimetry. The degree of neutrophil accumulation in myocardium was obtained by measuring myeloperoxidase activity and histological analysis. Myocardial endothelial nitric oxide synthase activity and vascular endothelial cadherin content were measured by colorimetric method and immunoblotting analysis respectively. Results Tongxinluo significantly increased the local blood flow and limited the infarct and size of no reflow. Tongxinluo also attenuated myeloperoxidase activity and neutrophil accumulation in histological sections and maintained the level of vascular endothelial cadherin and endothelial nitric oxide synthase activity in the reflow region when compared with control group. The protection of Tongxinluo was counteracted by coadministration with L-NNA. Conclusions Tongxinluo may limit myocardial ischaemia and protect the heart against reperfusion injury. Tongxinluo regulates synthesis of nitric oxide by altering activity of endothelial nitric oxide synthase.展开更多
目的调查1起食源性疾病事件的发生原因,为预防类似事件发生提供参考依据。方法采用现场流行病学和病例对照研究方法,制定病例定义,开展病例搜索,结合病例临床、就餐史等信息查找可疑餐次,采集可疑食物、病例和环境等样本进行实验室检测...目的调查1起食源性疾病事件的发生原因,为预防类似事件发生提供参考依据。方法采用现场流行病学和病例对照研究方法,制定病例定义,开展病例搜索,结合病例临床、就餐史等信息查找可疑餐次,采集可疑食物、病例和环境等样本进行实验室检测。结果共发现20例病例,均为广东省珠海市某公司员工,罹患率为18.7%(20/107)。临床表现主要为腹痛(占100%,20/20)和腹泻(占95%,19/20)。流行曲线显示点源暴露模式。现场流行病学调查结果显示,9月6日中餐为可疑餐次(RR=8.63,95%CI:1.04~71.53),病例对照分析结果显示,9月6日中餐的脆皮鸭为可疑食物(OR=5.11,95%CI:1.50~17.37),剂量-反应关系结果显示进食脆皮鸭的量越多,发病的风险越高(P<0.05)。实验室从3份病例肛拭子和1份留样脆皮鸭中检出占优势、同生化型的奇异变形杆菌,检出率为10.8%(4/37)。结论在实验室未能开展PFGE等分子分型方法时,现场流行病学调查对于区分奇异变形杆菌的致腹泻菌株和肠道正常携带菌株仍有一定的指导意义。建议将奇异变形杆菌的病原学监测纳入食源性疾病监测的国家分子分型网络体系Pulse Net China。展开更多
文摘Background The traditional Chinese medicine injury, but the mechanism of its action is not we protective role of Tongxinluo. Tongxinluo can protect myocardium against documented. We examined the involvement schaemia/reperfusion of nitric oxide in the Methods Miniswine were randomized to four groups of seven： sham, control, Tongxinluo and Tongxinluo coadministration with a nitric oxide synthase inhibitor N^ωnitro-L-arginine （L-NNA, 10 mg/kg i.v.）. Three hours after administration of Tongxinluo, the animals were anaesthetised and the left anterior descending coronary artery ligated and maintained in situ for 90 minutes followed by 3 hours of reperfusion before death. Area of no reflow and necrosis and risk region were determined pathologically by planimetry. The degree of neutrophil accumulation in myocardium was obtained by measuring myeloperoxidase activity and histological analysis. Myocardial endothelial nitric oxide synthase activity and vascular endothelial cadherin content were measured by colorimetric method and immunoblotting analysis respectively. Results Tongxinluo significantly increased the local blood flow and limited the infarct and size of no reflow. Tongxinluo also attenuated myeloperoxidase activity and neutrophil accumulation in histological sections and maintained the level of vascular endothelial cadherin and endothelial nitric oxide synthase activity in the reflow region when compared with control group. The protection of Tongxinluo was counteracted by coadministration with L-NNA. Conclusions Tongxinluo may limit myocardial ischaemia and protect the heart against reperfusion injury. Tongxinluo regulates synthesis of nitric oxide by altering activity of endothelial nitric oxide synthase.
文摘目的调查1起食源性疾病事件的发生原因,为预防类似事件发生提供参考依据。方法采用现场流行病学和病例对照研究方法,制定病例定义,开展病例搜索,结合病例临床、就餐史等信息查找可疑餐次,采集可疑食物、病例和环境等样本进行实验室检测。结果共发现20例病例,均为广东省珠海市某公司员工,罹患率为18.7%(20/107)。临床表现主要为腹痛(占100%,20/20)和腹泻(占95%,19/20)。流行曲线显示点源暴露模式。现场流行病学调查结果显示,9月6日中餐为可疑餐次(RR=8.63,95%CI:1.04~71.53),病例对照分析结果显示,9月6日中餐的脆皮鸭为可疑食物(OR=5.11,95%CI:1.50~17.37),剂量-反应关系结果显示进食脆皮鸭的量越多,发病的风险越高(P<0.05)。实验室从3份病例肛拭子和1份留样脆皮鸭中检出占优势、同生化型的奇异变形杆菌,检出率为10.8%(4/37)。结论在实验室未能开展PFGE等分子分型方法时,现场流行病学调查对于区分奇异变形杆菌的致腹泻菌株和肠道正常携带菌株仍有一定的指导意义。建议将奇异变形杆菌的病原学监测纳入食源性疾病监测的国家分子分型网络体系Pulse Net China。
