人环素诱导心肌细胞染色质可访问性的全球变化,这些变化与心血管疾病的位置重叠
E Renee Matthews1, Raodatullah O Abodunrin2, John D Hurley3
1Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas, 77555, USA.
bioRxiv : the preprint server for biology
|July 16, 2025
概括
像Anthracyclines (ACs) 这样的乳腺癌疗法可能会损害心脏. 这项研究揭示了这些药物如何改变心脏细胞基因调节,这可能解释了与遗传变异相关的心血管疾病 (CVD) 风险.
科学领域:
- 心脏病学 心脏病学
- 基因组学就是基因组学.
- 药理学 药理学是指药理学的学科.
背景情况:
- 乳腺癌治疗,包括Anthracyclines (ACs) 和Trastuzumab,与心血管疾病 (CVD) 风险增加有关,例如心力衰竭 (HF) 和心房动 (AF).
- 无编码DNA区域中的数百种遗传变异与这些心血管疾病有关.
- 这些癌症药物对心脏非编码基因组和心血管疾病风险位的调节潜力的影响仍然在很大程度上不明.
研究的目的:
- 为了研究如何antracyclines (ACs) 和Trastuzumab影响心肌细胞的全球染色质可访问性.
- 为了确定基因组的调节区域的变化,以应对这些心脏毒性癌症药物.
- 探索药物诱导的染色质变化与已知的心血管疾病风险位置之间的关系.
主要方法:
- 全球染色体可访问性是在诱导多能干细胞 (iPSC) 衍生的心肌细胞中测量.
- 细胞被用人类环保素 (多克索鲁比,埃皮鲁比,达诺鲁比),米托克桑,特拉斯图祖马布或车载控制器治疗了3小时和24小时.
- 分析涉及识别高可靠性开放色素区域和建模可访问性响应签名.
主要成果:
- 确定了155,557个高可信度的开放色素区域,药物类型和治疗时间是主要的变化来源.
- 发现了三种不同的染色体可访问性反应特征 (早期急性,早期持续性,晚期),涉及67,329个区域.
- 药物诱导的染色质开放与DNA损伤反应转录因子动机 (p53,ZBTB14) 联系在一起,增加了基因素乙化和基因表达.
- 21个AF和HF相关的SNP与药物诱导的开放区域重叠.
- 与HF和AF风险相关的特定SNP (rs3176326) 显示,在响应ACs时,染色质可访问性,基因素乙化和CDKN1A表达增加.
结论:
- 人环素诱导心肌细胞染色质可访问性的大规模,时间依赖的变化.
- 这些在特定位置的药物诱导的基因组变化可能会导致心血管疾病的发展.
- 这些发现提供了心脏毒性癌症疗法和对心脏病的遗传倾向之间的机制联系.
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