New Metrics for Evaluating Viral Respiratory Pathogenesis.

Area of Science:

• * Virology and Immunology
• * Respiratory Medicine
• * Animal Models of Disease

Background:

• * Traditional studies of respiratory virus pathogenesis in mice often use systemic disease markers, which may not accurately reflect human disease.
• * This approach can obscure the direct impact of viruses on lung function and immune responses.
• * A need exists for methods that directly assess pulmonary function during respiratory viral infections in preclinical models.

Purpose of the Study:

• * To evaluate the utility of whole-body plethysmography for assessing pulmonary function changes during respiratory viral infections in mice.
• * To compare plethysmography findings with traditional pathogenesis metrics.
• * To investigate virus- and dose-specific effects on respiratory function and identify long-term changes.

Main Methods:

• * Whole-body plethysmography was employed to directly measure respiratory parameters in mice infected with SARS-CoV and Influenza A Virus.
• * Pulmonary function data were correlated with established pathogenesis markers.
• * Dose-response relationships and temporal changes in respiratory function were analyzed.

Main Results:

• * Whole-body plethysmography effectively tracked changes in pulmonary function, correlating well with traditional pathogenesis metrics.
• * The method distinguished between virus-specific and dose-dependent responses to SARS-CoV and Influenza A Virus.
• * Long-term alterations in respiratory function were identified following infection with both viruses.

Conclusions:

• * Whole-body plethysmography is a valuable tool for directly measuring respiratory function in mouse models of viral infection.
• * Assessing pulmonary function provides a more clinically relevant understanding of viral pathogenesis compared to systemic markers alone.
• * This approach enhances the study of respiratory virus infections and their long-term consequences.