高脂日粮对小鼠肠道基因表达谱的影响

EFFECTS OF HIGH FAT DIET ON GENE EXPRESSION PROFILE OF INTESTINE IN C57BL/6 MICE

目的探讨长期饲喂高脂日粮对小鼠肠道基因表达谱的影响。方法16只C57BL/6雄性小鼠,体重约12～13g,饲喂正常日粮1w后,根据体重随机分为正常对照组(正常日粮)和高脂组(高脂日粮),饲养6w,眼球采血宰杀小鼠,迅速分离空肠一段,同组4只小鼠的约100μg空肠合并在一起,应用含13097寡核苷酸探针的小鼠Affymetrix MOE430A基因芯片检测肠道基因表达的改变。结果与对照组相比,模型组共出现267条差异表达基因,这些差异表达的基因主要涉及自由基/氧化应激、DNA修复、细胞凋亡、物质转运、细胞信号转导和炎症/免疫反应等相关基因。结论长期高脂日粮可能通过影响小鼠肠道氧化还原状态,广泛调控肠道多种基因表达。

Objective To explore the influence of high fat diet on the intestinal gene expression profile in C57BL/6 mice. Method C57BL/6 mice were randomly assigned to two groups （n=8）. The control group consumed an ordinary diet. The experimental group was fed with a high fat diet. All mice were sacrificed at the end of 6 w and the intestinal gene expressions were detected by oligonucleotide microarray analysis with Affymetrix GeneChip Mouse U430A consisting of 13 097 genes. Results Among the 13 097 genes obtained from gene expression profile analysis, there were 88 and 179 genes up - and down-regulated respectively, in mice fed with high fat diet compared with the control. The differentially expressed genes were mainly related to free radical oxidative stress, DNA repair, induction of apoptosis, transport, signal transduction and inflammation immune response. Conclusion High fat diet may widely modulate the expression of many genes in the intestine in mice.