SCI REP:启动子高甲基化使散发性甲状旁腺腺瘤中的CDKN2A,CDKN2B和RASSF1A基因失活

2017-06-10 MedSci MedSci原创

细胞周期蛋白D1,是一个G1-S期调节因子,在中表达上调。由于细胞周期蛋白依赖激酶(CDK)抑制剂CDKN2A和CDKN2B以及RASSF1A(Ras相关结构域家族1,同工型A)参与G1期S期停滞,并作为潜在的肿瘤抑制基因,因此,我们旨在研究潜在的甲基化 - 介导的这些基因在甲状旁腺腺瘤中的失活。

细胞周期蛋白D1,是一个G1-S期调节因子,在中表达上调。由于细胞周期蛋白依赖激酶(CDK)抑制剂CDKN2A和CDKN2B以及RASSF1A(Ras相关结构域家族1,同工型A)参与G1期S期停滞,并作为潜在的肿瘤抑制基因,因此,我们旨在研究潜在的甲基化 - 介导的这些基因在甲状旁腺腺瘤中的失活。在甲状旁腺腺瘤组织(n = 30)中分析细胞周期蛋白D1(CCND1)和调节分子(CDKN2A,CDKN2B和RASSF1A)的基因表达。我们评估细胞周期蛋白D1调节因子的DNA启动子区的甲基化,并证明与患者的临床病理特征相关。基因表达分析显示,与正常甲状旁腺组织相比,甲状旁腺腺瘤组织中,下列基因的表达有不同倍数的下调,CDKN2A为0.35(p = 0.01),CDKN2B为0.45(P = 0.02),RASSF1A为0.39(p <0.01)。CDKN2A和CDKN2B表达与CCND1呈反比关系。此外,CDKN2A,CDKN2B和RASSF1A的启动子区分别在50%(n = 15),47%(n = 14)和90%(n = 27)腺瘤中显着的高度甲基化。相比之下,在正常甲状旁腺组织中没有观察到这些基因的这种异常甲基化。因此,启动子高甲基化与散发性甲状旁腺腺瘤中CCND1调节基因的下调相关。 这种失调的细胞周期机制可能有助于甲状旁腺肿瘤发生。

原文出处:

Ashutosh Kumar Arya, Sanjay Kumar Bhadada,Sudhaker D. Rao,et al.Promoter hypermethylation inactivates CDKN2A, CDKN2B and RASSF1A genes in sporadic parathyroid adenomas.[J]2017 June 9.doi:10.1038/s41598-017-03143-8

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    2018-05-08 zxxiang
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    2017-06-12 zhouqu_8
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