IBD:TGFβ1和IL-6基因中的 CpG甲基化是区分儿童CD与UC的良好生物标志物

2020-10-02 MedSci原创 MedSci原创

克罗恩病(CD)和溃疡性结肠炎(UC)都是慢性复发性炎症性肠病(IBD),儿童发病的患者也非常多。患有CD或UC的儿童通常会经历很多挑战。

        克罗恩病(CD)和溃疡性结肠炎(UC)都是慢性复发性炎症性肠病(IBD),儿童发病的患者也非常多。患有CD或UC的儿童通常会经历很多挑战,包括多次手术,失学和生活质量下降的困扰。对于疾病的诊断与治疗,尽管粪便钙卫蛋白在成人中具有较高的准确性,但其在儿童中的准确性仍然较低。全基因组关联研究已经确定了IBD的很多易感基因位点。CD患者尤其与NOD2基因变异之间的关联较强。但是,该基因的诊断准确性非常有限(敏感性= 51%,特异性= 75%)。而全基因组DNA甲基化研究与IBD相关的潜在甲基化位点明显相关。鉴定这种关联可以极大地增加我们对疾病发病机理的了解,并为更好的管理和治疗提供有效工具。本项研究旨在探究转化生长因子β1(TGFβ1)和白介素6基因启动子的甲基化标记是否在CD中具有诊断作用。

 

        研究人员对相关的患者进行了病例对照研究。所有患者均是未经治疗,且在20岁之前被确诊的儿童。对照组患者没有炎症性肠病。研究人员将患者的外周血进行DNA分析,以鉴定TGFβ1和白介素6基因启动子区域的甲基化位点(CpG)。经过最初的非参数单变量分析,拟合了多元逻辑回归模型。确定了具有最佳拟合度和最强区分能力(曲线下面积[AUC])的模型。

 

        本项研究总共包括67位CD患者,31位UC患者和43位对照患者。3组的年龄分布相似。大多数CD患者患有回肠结肠疾病(44.8%)和处于炎症活动期(88.1%)。大多数UC患者患有广泛性(71%)和中度炎症活动度(51.6%)。Logistic回归分析显示以下内容:CD与对照患者之间有14个TGFβ1CpG位点(AUC = 0.94),UC与对照患者之间有9个TGFβ1CpG位点(AUC = 0.99),CD与UC之间有3个TGFβ1CpG位点(AUC = 0.81),并且有6个TGFβ1CpG位点可以将结肠CD与UC区别开(AUC = 0.91)。

 

        研究最后,作者说道TGFβ1基因启动子中的CpG甲基化对CD和UC的识别能力很强,可以作为重要的诊断标志物。

 

原始出处:

Suzanne Samarani. Et al. CpG Methylation in TGFβ1 and IL-6 Genes as Surrogate Biomarkers for Diagnosis of IBD in Children. Inflammatory Bowel Diseases.2020.

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    2021-08-06 yuanming7
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    2021-04-20 yangeasy
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    2021-09-10 changhe713
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    2020-10-04 bnurmamat
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    2020-10-04 kzlchina
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Nat Genet:晚期前列腺癌的DNA甲基化情况

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