Abstract
目的 通过研究HBx基因转染到人正常胆管上皮(HBECs)后对人端粒酶逆转录酶(hTERT)基因的转录调节作用,以阐明HBV感染在胆管癌发生中的作用机制.方法瞬时转染HBx基因到体外培养的HBECs,同时转染含增强型绿色荧光蛋白(EGFP)基因的克隆载体以判定转染率;RT-PCR分析转染后HBECs内hTERT mRNA的表达变化;并通过细胞免疫组化技术了解转染细胞内HBx蛋白的表达.结果经EGFP判定的转染率约为15%;未经转染或转染空载体的HBECs不表达hTERT mRNA,而转染HBx基因的HBECs可表达明显的hTERT mRNA;只有在转染了HBx基因的HBECs可检测到HBx蛋白表达.结论 HBx基因转染能激活hTERT mRNA的转录表达,这种顺式调节作用可能是胆管上皮增殖、分化并恶化的主要机制。
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