摘要
目的 :探讨跨膜肿瘤坏死因子受体 (m TNFR1 )在大鼠多器官功能障碍综合征 (MODS)中表达的变化及其意义。 方法 :将 32只健康雄性 SD大鼠随机分为 MODS组与正常对照组 ,采用创伤 +感染二次打击 ,复制出“双相迟发”的 MODS大鼠模型 ,并用逆转录聚合酶链式反应 (RT- PCR)及免疫组织化学方法半定量检测 m TNFR1 在大鼠主要器官表达的变化。 结果 :MODS组和正常对照组肝、肺、肾组织均有 m TNFR1 的表达 ,以肝组织表达最丰富 ,且 MODS组较正常对照组肝组织m TNFR1 的表达显著增加 (P<0 .0 5 ) ;而 MODS组肺、肾组织 m TNFR1 的表达较正常对照组虽有增加 ,但相差不显著 (P>0 .0 5 )。血清 AL T与肝组织 m TNFR1 基因表达水平呈正相关 (r=0 .76 6 0 ,P<0 .0 1) ,而血清 BU N与肾组织 m TNFR1 基因表达水平无相关性 (r=0 .32 2 6 ,P>0 .0 5 )。 结论 :动物发生多器官功能障碍之后 ,m TNFR1 的表达增加 ,提示肿瘤坏死因子(TNF)
Objective: To explore the expression changes of transmembrane tumor necrosis factor receptor in rats with multiple organ dysfunction syndrome(MODS). Methods: Thirty two healthy male SD rats were randomly divided into 2 groups. Sixteen rats (MODS group) were subjected to two hit to establish MODS model, the other 16 rats (control group) were without any intervention. RT PCR and immunohistochemistry methods were applied to detect the expression of mTNFR 1 at the levels of mRNA and protein. Results: mTNFR 1 was expressed in normal liver, lung and kidney whereas the most abundant expression was found in liver. Compared with normal liver tissue, the expression of mTNFR 1 in MODS group was significantly higher ( P <0.05).Although the expression of mTNFR 1 in lung and kidney of MODS group was more than that of control group, the differences between the 2 groups was not significant( P >0.05). Serum concentration of ALT had correlation with mTNFR 1 gene expression level in liver,but no correlation existed between serum concentration of BUN and mTNFR 1 gene expression level in kidney. Conclusion: The expression of mTNFR 1 increases after the occurence of MODS, which indicates that the impact of TNF can be modulated at the level of receptor.
出处
《第二军医大学学报》
CAS
CSCD
北大核心
2003年第1期73-76,共4页
Academic Journal of Second Military Medical University
基金
国家自然科学基金 (3 9970 72 0 )
