The tyrosine kinase p56lck is essential in coxsackievirus B3-mediated heart disease

Area of Science:

• Virology
• Immunology
• Cardiology

Background:

• Infections play a role in the pathogenesis of numerous heart diseases.
• Coxsackievirus B3 (CVB3) is implicated in chronic dilated cardiomyopathy, a leading cause of heart failure and sudden death.

Purpose of the Study:

• To investigate the role of Src family kinases in CVB3 replication and pathogenesis.
• To determine if Lck (p56lck) is a critical host factor for CVB3 infection.

Main Methods:

• Utilized T-cell lines for in vitro CVB3 replication studies.
• Employed a mouse model lacking the p56lck gene to assess in vivo viral pathogenicity and disease development.
• Infected wild-type and p56lck-deficient mice with pathogenic CVB3.

Main Results:

• p56lck was found to be essential for efficient CVB3 replication in T-cells and viral persistence in vivo.
• Wild-type mice infected with CVB3 developed severe acute myocarditis, meningitis, hepatitis, pancreatitis, and dilated cardiomyopathy.
• Mice lacking p56lck were completely protected against CVB3-induced acute disease and chronic heart conditions.

Conclusions:

• Src family kinases, specifically Lck (p56lck), are crucial for CVB3 replication and pathogenicity.
• p56lck represents a key host factor controlling CVB3's ability to replicate and cause disease.
• Targeting p56lck may offer a novel therapeutic strategy for preventing or treating CVB3-related heart diseases.