Endothelial cells and cathepsins: Biochemical and biomechanical regulation

Area of Science:

• Cardiovascular Biology
• Protease Function
• Mechanotransduction

Background:

• Cathepsins are mechanosensitive proteases regulated by biochemical and biomechanical factors in the cardiovascular system.
• Their activity influences cardiovascular tissue remodeling, implicated in atherosclerosis, aneurysms, and heart valve disease.
• Endothelial cells integrate inflammatory and biomechanical signals to modulate cathepsin activity.

Purpose of the Study:

• To explore the role of cysteine cathepsins in cardiovascular diseases beyond traditional understanding.
• To investigate how altered hemodynamics and biochemical cues in specific diseases impact cathepsin activation.
• To identify new therapeutic targets by understanding cathepsin involvement in complex cardiovascular conditions.

Main Methods:

• Review and synthesis of existing literature on cathepsins, mechanobiology, and cardiovascular diseases.
• Analysis of signaling pathways integrating biomechanical forces and inflammatory cues in endothelial cells.
• Examination of disease-specific factors (e.g., sickle cell, HIV) influencing cathepsin activity and cardiovascular remodeling.

Main Results:

• Cathepsin activity is modulated by fluid shear stress and inflammatory cytokines in endothelial cells.
• Specific conditions like sickle cell disease present unique hemodynamic and biochemical challenges affecting elastin remodeling.
• HIV-mediated cardiovascular disease involves accelerated mechanisms influenced by viral proteins and antiretrovirals.

Conclusions:

• Cathepsin activation is a critical nexus of biomechanical and biochemical signaling in cardiovascular health and disease.
• Expanding cathepsin research to include diseases like sickle cell and HIV offers novel insights into accelerated remodeling.
• Understanding these complex interactions is crucial for developing new therapeutic strategies for cardiovascular disease prevention and treatment.