摘要
目的探讨胃癌组织中细胞周期素G1(cyclinG1)和cyclinG2基因的表达及其意义。方法采用逆转录聚合酶链反应检测了55例胃癌组织、正常胃组织中的cyclinG1和cyclinG2基因的mRNA表达,流式细胞术检测cyclinG1蛋白的细胞周期分布和表达水平,对cyclinG基因进行测序分析。结果胃癌组织中cyclinG1mRNA表达的阳性率为58%,明显高于正常胃组织(18%,P<0.05),cyclinG1mRNA与蛋白表达之间有正相关性(r=0.456,P=0.000);胃癌组织的cyclinG1蛋白表达阳性率为74.3%,正常胃组织为2.3%,二者之间差异有统计学意义(P<0.05)。CyclinG1蛋白表达于G0/G1期开始出现,在G2/M期达到高峰,有高峰延迟现象。CyclinG2mRNA在胃癌组织中的表达水平为0.5±0.5,正常胃组织中为2.0±0.4,两者之间差异有统计学意义(P<0.01)。CyclinG1与cyclinG2之间表达无相关性(r=-0.217,P=0.063)。CyclinG基因测序结果与genebank中cDNA序列完全一致,没有发现突变点、缺失点或移位点。结论CyclinG的异常表达可能与胃癌的恶性程度和发生发展有关。
Objective To investigate the expression of cyclin G1、cyclin G2 in gastric carcinoma and its significance. Methods The mRNA expression of cyclin G1、cyclin G2 in 55 cases of gastric carcinoma was measured with RT-PCR. The protein expression of cyclin G1 and cell cycle were detected by flow cytometry.Results Expression rate of cyclin G1 in gastric carcinoma was 58%,which was higher than that in normal tissue(P<0.05);The positive expression levels of cyclin G2 mRNA in gastric carcinoma is 0.542±0.488,which was significantly lower than normal tissue(1.965±0.425, P<0.01). By DNA sequencing, the data showed no difference between the positive segment of cyclin G in gastric carcinoma and the objective gene in the genebank. The protein expression levels of cyclin G1 was correlated with its mRNA expression levels(r=0.456,P=0.000), but no relationship between cyclin G1 and cyclin G2(r=-0.217,P=0.063) was observed. Conclusions Abnormal expression of cyclin G was closely related with the origin and progression of gastric carcinoma.
出处
《中华普通外科杂志》
CSCD
北大核心
2005年第6期372-374,共3页
Chinese Journal of General Surgery
