核ATP-酸酶调节肌纤维细胞基因程序的染色体依赖激活和维护
Michael P Lazaropoulos1, Andrew A Gibb1, Douglas J Chapski2
1Aging + Cardiovascular Discovery Center, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, USA.
Nature cardiovascular research
|August 28, 2024
概括
ATP-酸酶 (ACLY) 通过促进肌纤维细胞分化通过基因素乙化驱动心脏纤维化. 抑制ACLY可以预防和逆转纤维化,保持心脏功能.
科学领域:
- 心血管生物学 心血管生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子心脏病学分子心脏病学
背景情况:
- 由肌纤维细胞分化驱动的心脏纤维化在心力衰竭中至关重要.
- 线粒体信号传递和组织素脱甲基化以前与肌纤维细胞形成有关.
- 素乙化在调节肌纤维细胞命运和心脏纤维化中的作用仍然不清楚.
研究的目的:
- 调查ATP-酸酶 (ACLY) 在心脏纤维化中的基因组乙化和肌纤维细胞分化中的作用.
- 确定ACLY活性是否对肌纤维细胞持续性和病态心脏重塑至关重要.
主要方法:
- 在压力过载心力衰竭的小鼠模型中使用遗传删除和药理抑制来研究ACLY的作用.
- 检查了ACLY的核定位,与SMAD2/3的相互作用,以及其对纤维细胞基因定位处基因乙化 (H3K27ac) 的影响.
- 评估了ACLY操纵对肌纤维细胞分化,纤维化发展和心脏功能的影响.
主要成果:
- 通过ACLY的非激活,可以防止肌纤维细胞的分化,并诱导静止.
- 在激活的肌纤维细胞中,Acly的遗传除减弱了纤维化,并保持了心脏功能.
- TGFβ刺激增加了ACLY核局部化和H3K27ac在纤维化基因,这被ACLY抑制阻止.
结论:
- 核ACLY活性对于肌纤维细胞分化和持久性是必不可少的,因为它通过维持基因素乙化来维持基因素乙化.
- 针对ACLY提供了一个潜在的治疗策略,以预防和逆转心脏纤维化.
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