ARID5A orchestrates cardiac aging and inflammation through MAVS mRNA stabilization

Area of Science:

• Cardiovascular Biology
• Aging Research
• Molecular Medicine

Background:

• Human cardiac aging involves complex histological, cellular, and molecular changes.
• Understanding the regulatory mechanisms of heart aging is crucial for developing interventions.

Purpose of the Study:

• To elucidate the molecular mechanisms driving human cardiac aging.
• To identify key regulators of aging-related inflammation in the heart.

Main Methods:

• Analysis of human heart tissues from individuals across a wide age range.
• Single-cell RNA sequencing to decode aging-related gene expression.
• Investigated the role of ARID5A and its downstream targets (MAVS, NF-κB, TBK1).
• Utilized gene therapy in aged mice to assess therapeutic potential.

Main Results:

• Increased inflammation is a key feature of cardiac aging, driven by ARID5A upregulation.
• ARID5A regulates MAVS mRNA stability, activating inflammatory pathways (NF-κB, TBK1).
• Gene therapy targeting ARID5A reduced inflammation and aging phenotypes, improving cardiac function in aged mice.

Conclusions:

• The ARID5A-MAVS axis plays a critical role in post-transcriptional regulation of cardiac aging and inflammation.
• Targeting ARID5A offers a potential therapeutic strategy for age-related cardiac dysfunction.