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BRG1/BRM-associated factor chromatin remodeling complexes in cardiovascular disease: Mechanisms and therapeutic
Chang Liu1, Yanjiao Wu1, Liang Wang2
1Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, China.
Insights
BRG1/BRM-associated factor (BAF) chromatin remodeling complexes are crucial in cardiovascular diseases (CVDs). This review synthesizes evidence linking BAF subtypes and subunits to various CVDs, offering new therapeutic avenues.
Area of Science:
- Molecular Biology
- Epigenetics
- Cardiovascular Research
Background:
- Cardiovascular diseases (CVDs) are a major global health burden, with underlying epigenetic mechanisms poorly understood.
- BRG1/BRM-associated factor (BAF) complexes, part of the SWI/SNF family, regulate chromatin accessibility and gene transcription.
- Mammalian BAF complexes exist in three subtypes (cBAF, PBAF, ncBAF) with distinct roles.
Purpose of the Study:
- To review the role of BAF-dependent chromatin remodeling in various cardiovascular diseases.
- To highlight subtype- and subunit-specific mechanisms involved in CVD pathogenesis.
- To explore potential therapeutic strategies targeting BAF complexes for CVD prevention and treatment.
Main Methods:
- Literature review synthesizing evidence on BAF complexes and CVDs.
- Analysis of BAF subunit composition and genomic targeting in different CVD contexts.
- Examination of molecular mechanisms including signaling pathways and protein regulation.
Main Results:
- BAF complexes are implicated in myocardial infarction, heart failure, atherosclerosis, and other CVDs.
- Specific BAF subtypes and subunits mediate processes like inflammation, oxidative stress, and extracellular matrix remodeling.
- Post-translational modifications and protein-protein interactions of BAF components are critical.
Conclusions:
- BAF-dependent chromatin remodeling is a key epigenetic regulator in cardiovascular pathophysiology.
- Targeting specific BAF complexes or their interactions offers potential for novel CVD therapies.
- Further research into tissue-specific delivery and context-dependent effects is warranted.
Abstract:
Cardiovascular diseases (CVDs) remain a leading cause of morbidity and mortality worldwide, yet the epigenetic mechanisms that connect stress signals to durable transcriptional remodeling are incompletely understood. The BRG1/BRM-associated factor (BAF) chromatin remodeling complexes, mammalian members of the SWItch/sucrose non-fermentable (SWI/SNF) family, regulate chromatin accessibility by repositioning nucleosomes and by cooperating with transcription factors and histone-modifying enzymes. Recent structural and functional studies classify mammalian BAF complexes into three major subtypes including canonical BAF (cBAF), polybromo-associated BAF (PBAF), and non-canonical BAF (ncBAF), with distinct subunit compositions and disease-relevant genomic targeting. In this review, we synthesize evidence linking BAF-dependent chromatin remodeling to myocardial infarction, ischemia-reperfusion injury, heart failure, diabetic cardiomyopathy, cardiac hypertrophy, arrhythmia, congenital heart disease, atherosclerosis, and aortic aneurysm. We emphasize subtype and subunit specific mechanisms, including inflammatory signaling, oxidative stress responses, fetal gene reactivation, ion-channel transcription, extracellular-matrix remodeling, and post-translational regulation of BAF-associated proteins. Finally, we discuss tissue-specific delivery, context-dependent effects, and the need to target disease-relevant protein-protein interfaces, providing potentially new theoretical basis and potential research directions for the prevention and treatment of CVD.
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