To evaluate the role of murine fibrinogen like protein 2 (mfgl2) /fibroleukin in lung impairment in Severe acute respiratory syndrome (SARS), a murine SARS model induced by Murine hepatitis virus strain 3 (MHV-3) thro...To evaluate the role of murine fibrinogen like protein 2 (mfgl2) /fibroleukin in lung impairment in Severe acute respiratory syndrome (SARS), a murine SARS model induced by Murine hepatitis virus strain 3 (MHV-3) through trachea was established. Impressively, all the animals developed interstitial pneumonia with extensive hyaline membranes formation within alveoli, and presence of micro-vascular thrombosis in the pulmonary vessels. MHV-3 nucleocapsid gene transcripts were identified in multiple organs including lungs, spleen etc. As a representative proinflammatory gene, mfgl2 prothrombinase expression was evident in terminal and respiratory bronchioles, alveolar epithelia and infiltrated cells in the lungs associated with fibrin deposition and micro-vascular thrombosis. In summary, the established murine SARS model could mimic the pathologic characteristics of lungs in patients with SARS. Besides the physical damages due to virus replication in organs, the up-regulation of novel gene mfgl2 in lungs may play a vital role in the development of SARS associated lung damage.展开更多
基金National 973 project of Chnia for SARS study (2003CB514112) Ministry of Education of China for SARS study (2003-18) National Science Fund for Distinguished Young Investigators (30225040,. 30123019).
文摘To evaluate the role of murine fibrinogen like protein 2 (mfgl2) /fibroleukin in lung impairment in Severe acute respiratory syndrome (SARS), a murine SARS model induced by Murine hepatitis virus strain 3 (MHV-3) through trachea was established. Impressively, all the animals developed interstitial pneumonia with extensive hyaline membranes formation within alveoli, and presence of micro-vascular thrombosis in the pulmonary vessels. MHV-3 nucleocapsid gene transcripts were identified in multiple organs including lungs, spleen etc. As a representative proinflammatory gene, mfgl2 prothrombinase expression was evident in terminal and respiratory bronchioles, alveolar epithelia and infiltrated cells in the lungs associated with fibrin deposition and micro-vascular thrombosis. In summary, the established murine SARS model could mimic the pathologic characteristics of lungs in patients with SARS. Besides the physical damages due to virus replication in organs, the up-regulation of novel gene mfgl2 in lungs may play a vital role in the development of SARS associated lung damage.
文摘目的探讨半夏总生物碱(total alkaloids from Pinellia Ternata,TATP)对人肺癌细胞株A549增殖的影响。方法采用四甲基偶氮唑盐(methyl thiazolil tetracolium,MTT)比色法以及集落形成率实验,检测不同浓度的TATP对A549细胞株的生长抑制作用。应用单细胞凝胶电泳分析检测TATP导致A549细胞的DNA损伤情况。结果人肺癌细胞A549经TATP处理后,其体外增殖能力明显下降且与药物的剂量、加药时间呈正相关,与对照组比较,差异均有统计学意义。单细胞凝胶电泳(Single cell gel electrophoresis,SCGE)中,TATP组细胞尾DNA含量、尾长及尾动量与对照组相比差异显著(P<0.01),且呈现浓度依赖性。结论在体外培养的条件下,TATP能明显抑制A549细胞增殖,其机制可能与DNA的损伤作用有关。
