[Signal transduction in heart failure]

Area of Science:

• Cardiovascular Biology
• Molecular Medicine
• Cell Signaling

Context:

• Heart failure is a complex condition resulting from ischemic disease, valvular insufficiency, and viral myocarditis.
• The precise molecular mechanisms driving heart failure progression remain incompletely understood.
• Mammalian cells feature four parallel kinase cascades converging on mitogen-activated protein kinase (MAPK) family members.

Purpose:

• To elucidate the role of specific kinase pathways in the pathogenesis of heart failure.
• To investigate the contribution of apoptosis signal-regulating kinase 1 (ASK1) to cardiac dysfunction.
• To understand the interplay between myocyte apoptosis and myocardial interstitial changes in heart failure progression.

Summary:

• Mitogen-activated protein kinase (MAPK) family members, including ERKs, JNK, and p38, are activated through upstream kinase cascades.
• Apoptosis signal-regulating kinase 1 (ASK1), an activator of JNK and p38, promotes cardiac dysfunction, dilation, and fibrosis.
• Myocyte apoptosis and interstitial changes, such as extracellular matrix deposition and fibroblast activation, are critical in heart failure progression.

Impact:

• Provides insights into the molecular signaling pathways implicated in heart failure.
• Highlights the role of ASK1 as a potential therapeutic target for mitigating cardiac dysfunction and fibrosis.
• Emphasizes the significance of both cellular and interstitial remodeling in the development and progression of heart failure.