IBD: 一种可以用于早期诊断高风险炎症肠病患者发生癌变的新甲基化标志物

2018-12-01 MedSci MedSci原创

有文献已经报道结肠炎性肠病(IBD)患者发生结直肠癌(CRC)的风险是显着增加的。因此,本研究的目的是评估选定的甲基化基因组在高风险IBD患者中早期检测CRC的有效性。

背景及目的
有文献已经报道结肠炎性肠病(IBD)患者发生直肠癌(CRC)的风险是显着增加的。因此,本研究的目的是评估选定的甲基化基因组在高风险IBD患者中早期检测CRC的有效性。

方法
研究人员在全基因组DNA甲基化分析中检测了74个IBD患者(与CRC相关或不相关)的73个活组织检查。选择了5个基因组(EYA4,SLIT2,FLI1,USP44和SND1)作为潜在的生物标志物,使用甲基化特异性熔解曲线分析在203名患者的患病和邻近健康组织的活组织检查中进行前瞻性验证:38例患有IBD和相关的肿瘤,81例患者IBD(其中25例具有高风险),48例具有散发性CRC,以及36例健康对照。

结果
IBD患者和相关肿瘤患者的甲基化患病率高于健康对照组(71% VS 6%;P= 0.00006)。发现异常增生或癌症高风险的IBD患者甲基化的发生率低于低风险患者(92%vs 57%;P= 0.001)。EYA4和SLIT2是最常突变的甲基化的标志物。甲基化水平的差异在健康粘膜中更明显(82%VS15%;P= 0.0001)。

结论
对相应甲基化标记物的分析可能有助于早期鉴定高风险IBD患者的结肠直肠发育不良或发生癌症的可能性。

原始出处:

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    2018-12-03 bnurmamat
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    2018-12-03 axin014

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