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Influence of DPC4 gene on proliferation of human pancreatic cancer cell line JF305
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF PANCREATOLOGY
- Issue:
- 4
- DOI:
- 10.3760/cma.j.issn.1674-1935.2005.04.004
- Key Word:
- 基因,抑制,肿瘤;DPC4;胰腺肿瘤;肿瘤细胞,培养级
Abstract： 目的研究肿瘤抑制基因DPC4(deleted in pancreatic carcinoma)对人胰腺癌细胞系JF305增殖能力的影响.方法将携带DPC4基因的真核表达载体转入JF305细胞内,经G418筛选获得DPC4稳定表达细胞株,免疫细胞化学和RT-PCR法检测转染前后细胞内DPC4的表达.用MTT法、细胞计数法和流式细胞仪测定细胞生长曲线、细胞周期、细胞贴壁率和细胞克隆形成率.比较转染前后细胞增殖能力的变化.结果未转染及转染空质粒的JF305细胞无DPC4的表达,转染pBK-CMV-DPC4的JF305细胞可检测到DPC4的表达,且其细胞增殖能力较前明显下降(P < 0.001),细胞倍增时间显著延长(由11.8 d延长至18 d),细胞贴壁率和克隆形成率均明显下降(P < 0.0001),G1期细胞所占比例明显增加(P < 0.0001),G2/M期细胞所占比例明显下降(P < 0.0001).结论无DPC4表达的胰腺癌细胞株JF305可转基因获得DPC4稳定表达,DPC4转基因后可抑制其增殖能力,细胞G1期延长,G2/M期缩短.DPC4有望成为胰腺癌基因治疗新的候选基因.
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