目的 探讨不同胃病变患者的发生发展直至恶变过程中c-myc mRNA的表达与幽门螺杆菌(Hp)感染的相关性及其与胃组织细胞程序性死亡的关系.方法 通过实时荧光定量逆转录-聚合酶链反应(FQ-PCR)检测72例慢性浅表性胃炎(CSG)、55例慢性萎缩性胃炎(CAG)、52例肠化生(IM)、46例不典型增生(AH)、65例胃癌(GC)组织(分别为CSG、CAG、IM、AM、AH、GC组)中c-myc mRNA的表达;快速尿素酶法、Warthin-Starry银染法和甲苯胺蓝染色联合检测胃黏膜Hp感染;原位末端标记法(TUNEL)检测胃黏膜细胞程序性死亡指数(AI).结果 CSG、CAG、IM、AM、AH、GC组胃黏膜组织中c-myc mRNA的阳性率分别为21.5% (7/31)、31.0%(8/27)、41.0%(10/26)、59.1% (14/24)、69.1(23/33),c-myc mRNA相对表达水平分别为0.089±0.002、0.0113±0.014、0.168 ±0.028、0.226±0.040、0.367±0.037,IM、AH、GC组c-myc mRNA表达量均高于CSG、CAG组(P<0.01),AH组高于IM组(P<0.01),GC组高于IM、AH组(P<0.01).c-myc mRNA表达量与胃黏膜细胞AI呈负相关(L=-0.700,P<0.05);IM、AH、GC组Hp阳性患者胃黏膜细胞中c-myc mRNA的表达均高于Hp阴性患者(P<0.05或0.01).结论 胃黏膜癌变过程中,Hp感染能上调胃黏膜细胞中c-myc mRNA的表达,而抑制异形细胞程序性死亡而发挥致癌作用.
Objective To discuss different stomach trouble change occurred in the process of development until the progression in patients with c-myc mRNA expression in correlation with helicobacter pylori (Hp) infection and its relationship with gastric tissue programmed cell death.Methods By real-time fluorescent quantitative reverse transcription-olymerase chain reaction (FQ-PCR) to detect 72 cases of chronic superficial gastritis (CSG),55 cases of chronic atrophic gastritis (the CAG),52 cases of intestinal metaplasia (IM),46 cases of atypical hyperplasia (AH),65 cases of gastric cancer (GC) group (CSG group,respectively,the CAG group,IM,AM group,AH,the GC group) in the c-myc mRNA expression;Rapid enzymatic urea,Warthin Starry silver staining and toluidine blue staining assay for gastric mucosa Hp infection;In situ end labeling (TUNEL) method to detect gastric mucosal cell apoptosis index (AI).Results CSG group,the CAG group,IM,AM group,AH,the GC group c-myc in gastric mucosa tissue mRNA positi