Correlation between endothelia cells activation and imbalance of cytokines in pulmonary hypertension of congenital heart disease

Objective To explore the correlation between endothelia cells activation and cytokines （ET-1, NO） levels in patients with pulmonary hypertension （PH）, and to discuss their roles in the development of PH. Methods Twenty patients with simple ventricular septal defect （VSD） were chosen as controls, and 30 patients with PH were studied. Plasma levels of ET-1 and NO were measured by radioimmunoassay or colorimetric method. Before cardiopulmonary bypass was established, the specimens from right lung were fixed with formaldehyde solution, embedded with paraffin and stained by SP immunohlstochemistry. Intercellular adhesion molecule-1 （ICAM-1） expression was measured through the determination of the light density with computer imaging technology. Results Compared with that of the patients with simple VSD, the light density of ICAM-1 and plasma level of ET-1 increased in patients with PH; but plasma level of NO decreased （P〈0.05）. Positive correlation was observed between ICAM-1 and ET-1/NO （P〈0.05）. Conclusion Endothelia cells activation and imbalance of ET-1/NO might play an important role in the development of PH.     

地铁应急指挥管理评价指标体系构建

介绍地铁系统发生各种突发事故的基本情况,对事故发生的原因、处置过程进行深入分析,据此总结得到地铁应急指挥管理的影响因素,最后以影响因素为基础建立应急指挥管理评价指标体系。