摘要
目的 采用基因芯片技术检测分析脓毒症晚期（24 h）肾组织基因表达谱,在基因水平上为脓毒症发病机制提供参考依据.方法 参照盲肠结扎穿孔术（cecal ligation puncture,CLP）制备大鼠脓毒症模型,30只Wistar大鼠随机分（随机数字法）为脓毒症组和对照组.观察两组动物肾功能指标的差异,应用透射电镜观察脓毒症晚期（24 h）大鼠肾组织病理字政变;采用含有22 107个大鼠基因cDNA克隆的表达谱基因芯片检测分析肾组织在脓毒症晚期（24 h）的基因表达,并应用计算机软件筛选出差异表达的基因.采用SPSS 11.0软件进行统计学分析,实验中测得的肾功能指标以均数±标准差（（-x）±s）表示,组间比较用两样本t检验,以P＜0.05为差异具有统计学意义.结果 术后24 h脓毒症组尿素氮（BUN）、肌酐（Cr）水平明显高于对照组（P＜0.01）,肾组织电镜检查结果提示制模成功.与对照组比较,脓毒症组大鼠肾组织有325个基因出现差异表达,在已知功能基因中,表达上调者100个,表达下调者64个,按照生物学功能分类,主要涉及物质能量代谢、免疫反应、细胞信号转导、细胞凋亡、离子通道和生长因子等方面.结论 脓毒症晚期大鼠肾组织出现一系列基因表达的异常,基因芯片检测技术是研究脓毒症基因机制的一个手段.
Objective To investigate the gene-expression profile in kidney of rats during late sepsis （24hours） by using microarray technology in order to offer some clue to revealing the pathogenetic mechanism of sepsis at gene level. Method A total of 30 Wistar rats were selected and divided into model group and control group randomly（random number）. The rats of control group were sham operated and the rats of model group received cecal ligature and puncture （CLP） operation. The biomarkers of renal function were assayed and the histopathological changes of kidney in rats were observed under transmission electron microscope 24 hours after operation. Gene chips containing 22 107 rat-genes cDNA were used to exmine gene-expression in kidney of septic rats to sieve the genes with different expressions with software. Data were analyzed by using SPSS version 11.0 software package.Statistical analyses of two independent samples carried out by using t -test. Results Compared with the control group, the levels of blood urea nitrogen （BUN） and creatinine （Cr） of sepsis group were higher （P ＜ 0.01 ）. The histopathological changes in kidney of rats demonstrated the establishment of sepsis model successful 24 hours later.Compared with the control group, there were 325 genes with differential expression in model group. Among the known-functional genes, there were 100 up-regulated and 64 down-regulated. Sorted by biological function, the genes were mainly related to metabolism, immunoresponse, cellular signal transduction, apoptosis, ion channel,growth factor and so on. Conclusions A sequence of genes expressed differentially in kidney of rats with late sepsis. Microarray technology played an important role in the research into sepsis mechanisms.
出处
《中华急诊医学杂志》
CAS
CSCD
北大核心
2010年第9期909-915,共7页
Chinese Journal of Emergency Medicine
关键词
脓毒症
肾
肾衰竭
基因表达
基因芯片
Sepsis
Kidney
Renal failure
Gene expression
Gene chips
