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RhoA is activated during respiratory syncytial virus infection
T L Gower1, M E Peeples, P L Collins
1Department of Microbiology and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, USA.
Virology
|May 5, 2001
Summary
Respiratory syncytial virus (RSV) activates the cellular protein RhoA during infection. This activation is linked to viral entry and pathogenesis, impacting cellular functions crucial for disease development.
Area of Science:
- Virology
- Cell Biology
- Molecular Biology
Background:
- Respiratory syncytial virus (RSV) causes severe respiratory infections in vulnerable populations.
- The RSV F glycoprotein mediates viral entry.
- The cellular protein RhoA is involved in critical cellular functions relevant to RSV pathogenesis.
Purpose of the Study:
- To investigate whether RhoA activation occurs in living cells during RSV infection.
- To explore the role of RhoA signaling in RSV pathogenesis.
Main Methods:
- RSV infection of HEp-2 cells.
- Assessing isoprenylated and membrane-bound RhoA levels.
- Measuring p130(cas) phosphorylation.
- Analyzing actin stress fiber formation.
- Utilizing Rho kinase inhibitor (Y-27632), HMG-CoA reductase inhibitor (lovastatin), and Clostridium botulinum C3 exotoxin.
Main Results:
- RSV infection increased isoprenylated and membrane-bound RhoA.
- RSV infection elevated p130(cas) phosphorylation, which was inhibited by Y-27632 and lovastatin.
- RSV infection induced actin stress fiber formation, which was prevented by C3 exotoxin.
Conclusions:
- RhoA and its downstream signaling pathways are activated during RSV infection.
- RhoA activation plays a role in RSV pathogenesis, influencing cellular functions like actin cytoskeleton organization.