两种活血法对萎缩性胃炎癌前病变大鼠基因表达的影响

Effect of promoting blood flow therapy on HSP70 and ptk2 in gastric mucosa of precancerous lesion of CAG in rats

目的:分析益气活血法与理气活血法干预后萎缩性胃炎癌前病变大鼠胃黏膜组织差异表达基因,从基因水平探讨益气活血法与理气活血法防治萎缩性胃炎癌前病变的作用机制。方法:使用金属弹簧、灌服氯化钠溶液和热糊的综合方法建立大鼠萎缩性胃炎癌前病变模型,运用基因芯片技术,检测益气活血法与理气活血法干预后萎缩性胃炎癌前病变大鼠基因的差异表达情况,筛选出差异表达基因,并应用real-time PCR对主要差异基因进行鉴定。结果:自然恢复组大鼠胃黏膜的热休克蛋白70(heat shock70KD protein,HSP70)基因和蛋白酪氨酸激酶2(protein tyrosine kinase2,ptk2)基因表达较空白对照组显著下调,经益气活血法治疗后HSP70明显上调,经理气活血法治疗后ptk2明显上调;运用real-time PCR法检测HSP70mRNA和ptk2mRNA表达水平,其鉴定结果分别与相应的基因芯片结果一致。结论:益气活血法可上调萎缩性胃炎癌前病变大鼠胃黏膜中的HSP70基因表达,从而抑制萎缩性胃炎癌前病变大鼠胃黏膜细胞凋亡,促进胃黏膜修复;理气活血法可上调萎缩性胃炎癌前病变大鼠胃黏膜中的ptk2基因表达,从而调节肌动蛋白细胞骨架的重构,促进损伤的胃黏膜修复和愈合,这可能是益气活血法和理气活血法治疗萎缩性胃炎癌前病变的机制之一。

Objective：To investigate the differentially expressed genes of gastric mucosa of precancerous lesion of chronic atrophic gastritis （CAG） in rats intervented by promoting blood flow therapy of TCM,and to analyze its mechanism at genetic level. Methods：The model of precancerous lesion of CAG rats was induced by spring insertion and intragastric administration of NaCl solution and hot paste. To detect the differentially expressed genes of precancerous lesion of CAG rats by gene chip technology,and the main differentially expressed genes were indentified by real-time PCR. Results：Compared with blank group,HSP70 and ptk2 significantly reduced in natural recovery group,the HSP70 expression increased signifi cantly after being treated with supplementing qi for promoting blood flow,and ptk2 expression increased obviously after being treated with regulating qi and promoting blood flow. The results of real-time PCR in expression level of HSP70mRNA and ptk2mRNA were the same as that of the gene chip technology. Conclusion：Supplementing qi for promoting blood flow can upregulate HSP70,thus inhibit precancerous lesion of CAG in rat gastric mucosal cell apoptosis and promote mucosal repair; Regulating qi and promoting blood flow can up-regulate ptk2,sequentially regular remodeling of actin cytoskeleton and promote repairing and healing of injury gastric mucosal. These may be one of mechanism that supplementing qi for promoting blood flow and regulating qi and promoting blood flow treat precancerous lesion of CAG.