与心血管疾病相关的非编码变体破坏了GATA4-DNA结合和调节功能
Edwin G Peña-Martínez1, Jean L Messon-Bird1, Jessica M Rodríguez-Ríos1
1Department of Biology, University of Puerto Rico-Río Piedras, San Juan, PR 00931, USA.
HGG advances
|February 13, 2025
概括
研究人员确定了与心血管疾病 (CVD) 相关的遗传变异,这些变异破坏了心脏转录因子GATA4.4的结合. 这些变异改变了基因调节,为心血管疾病发展提供了洞察力.
科学领域:
- 基因组学就是基因组学.
- 分子生物学分子生物学
- 心血管研究研究心血管研究
背景情况:
- 全基因组关联研究 (GWAS) 已经确定了许多与心血管疾病 (CVD) 相关的变异.
- 超过90%的这些变异位于非编码基因组中,可能会影响基因调节.
- 调节元件中的非编码变体可以改变组织特异性转录因子 (TF) 的功能.
研究的目的:
- 通过计算识别和实验测试与心血管疾病相关的单核酸多态 (SNPs),这些单核酸多态会影响人类心脏转录因子GATA4.4的DNA结合.
- 了解这些变异如何影响心血管疾病的背景下GATA4的基因调节功能.
主要方法:
- 利用一个有间隙的k-mer支向量机 (GKM SVM) 模型来得分CVD相关的SNP.
- 专注于位于基因调节元件中的SNP和来自心脏组织的表达定量特征位置 (eQTL).
- 预计优先变异会改变GATA4的DNA结合,包括结合部位的损失或增加.
主要成果:
- 确定了四种优先级的CVD相关SNP影响GATA4结合:rs1506537和rs56992000 (结合损失),rs2941506和rs2301249 (结合位点的产生).
- 观察到转录活动的显著变化与已识别的变体的改变的DNA结合亲缘关系相关.
- 证明了包括in silico,in vitro和细胞测试在内的全面评估.
结论:
- 介绍了用于识别非编码DNA中的功能性CVD相关变异的计算和实验框架.
- 突出了干扰GATA4结合和影响心脏基因调节的特定SNP,提供了对心血管疾病的机制性见解.
- 建立了进一步调查GATA4调节变异在心血管疾病发病过程中的作用的基础.
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