Gastroenterology:SPOCD1和BTN3A2为胃癌风险变异

2017-04-03 zhangfan MedSci原创

SPOCD1与BTN3A2在胃癌的发生起关键作用

许多基因变异与胃癌有关,尽管这些基因变异只占胃癌病例的一小部分。研究人员近日开展研究其目的是确定与胃癌相关的低频和其他遗传变异。

研究人员收集了中国,2006至2010年间,1113例胃癌患者DNA的血液样本和1848例无癌(对照组)进行外显子序列分析。在71290个突变中(包括25784个常见的变种),选择了24个突变进行采集样本的DNA分析,研究利用癌症基因组图谱和执行功能注释分析的数据对采集样本的基因表达进行比较。永生化的人胃上皮细胞株(GES1)和人胃癌细胞系7被用来进行外源基因表达,敲除基因的表达(小干扰RNA),基因破坏(使用CRISPR/Cas9系统)或评估报告构建表达。研究人员测量细胞增殖,集落形成,侵袭和迁移并评估裸鼠移植瘤的生长。

研究发现,在开发域包含基因1 (SPOCD1; 编码p.Arg71Trp)中的低频错义基因-1p35.2与低胃癌的风险相关(比值比, 0.56; P=3.48×10-8)。 SPOCD1在胃肿瘤组织中过表达,SPOCD1敲除可以减少裸鼠胃癌细胞增殖、侵袭活性、迁移及抑制裸鼠移植瘤生长。研究发现6p22.1的rs1679709与低胃癌的风险相关(比值比, 0.80; P=1.17×10-13)。保护性等位基因rs1679709-A与周围单倍型rs2799077-T-rs2799079-C相关,可减少嗜乳脂蛋白亚家族3成员A2基因(BTN3A2)表达增加,而BTN3A2在胃癌中过表达,BTN3A2敲除可以抑制胃癌细胞的增殖、迁移和侵袭。

研究表明,1p35.2和6p22.1突变导致胃癌风险增加, SPOCD1与BTN3A2在胃癌的发生起关键作用。

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    2017-06-03 许安
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    2017-10-21 sjq027
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    2017-04-16 dhzzm

    学习了分享了

    0

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