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Updated: Oct 25, 2025
A Protocol for Analyzing Hepatitis C Virus Replication
Published on: June 26, 2014
HCV Spread Kinetics Reveal Varying Contributions of Transmission Modes to Infection Dynamics
Karina Durso-Cain1,2, Peter Kumberger3, Yannik Schälte4,5
1Department of Microbiology and Immunology, and The Infectious Disease and Immunology Research Institute, Stritch School of Medicine, Loyola University Medical Center, Maywood, IL 60153, USA.
Insights
Hepatitis C virus (HCV) spreads through cell-free and cell-to-cell transmission. Both modes work together synergistically, enhancing viral spread and potentially contributing to persistence.
Area of Science:
- Virology
- Infectious Disease Dynamics
- Mathematical Biology
Background:
- Hepatitis C virus (HCV) spreads via cell-free and cell-to-cell transmission routes.
- The relative contribution of each transmission mode to overall HCV spread remains unclear.
Purpose of the Study:
- To quantify the distinct contributions of cell-free and cell-to-cell transmission to HCV spread.
- To understand how these transmission modes interact and influence viral dynamics.
Main Methods:
- Measured HCV lifecycle kinetics.
- Utilized in vitro spread assays with and without neutralizing antibodies.
- Employed a spatially explicit mathematical model for single-cell level analysis.
Main Results:
- Both cell-free and cell-to-cell transmission modes synergistically enhance HCV spread.
- The combined action of both modes contributes to viral persistence.
- The relative importance of each transmission mode varies with experimental conditions, indicating environmental optimization.
Conclusions:
- HCV spread is significantly enhanced by the synergistic interaction of cell-free and cell-to-cell transmission.
- This synergy may play a crucial role in the persistence of HCV infection.
- Viral spread dynamics are adaptable and optimized based on environmental factors.
Abstract:
The hepatitis C virus (HCV) is capable of spreading within a host by two different transmission modes: cell-free and cell-to-cell. However, the contribution of each of these transmission mechanisms to HCV spread is unknown. To dissect the contribution of these different transmission modes to HCV spread, we measured HCV lifecycle kinetics and used an in vitro spread assay to monitor HCV spread kinetics after a low multiplicity of infection in the absence and presence of a neutralizing antibody that blocks cell-free spread. By analyzing these data with a spatially explicit mathematical model that describes viral spread on a single-cell level, we quantified the contribution of cell-free, and cell-to-cell spread to the overall infection dynamics and show that both transmission modes act synergistically to enhance the spread of infection. Thus, the simultaneous occurrence of both transmission modes represents an advantage for HCV that may contribute to viral persistence. Notably, the relative contribution of each viral transmission mode appeared to vary dependent on different experimental conditions and suggests that viral spread is optimized according to the environment. Together, our analyses provide insight into the spread dynamics of HCV and reveal how different transmission modes impact each other.
