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The HIV Env-mediated fusion reaction
Stephen A Gallo1, Catherine M Finnegan, Mathias Viard
1Laboratory of Experimental and Computational Biology, Center for Cancer Research, NCI-Frederick, National Institute of Health, Miller Drive, Frederick, MD 21702-1201, USA.
Biochimica Et Biophysica Acta
|July 23, 2003
Summary
The human immunodeficiency virus (HIV) entry model requires updates. New data suggest including membrane microdomains, actin polymerization, and signaling pathways for a more complete understanding of viral entry.
Area of Science:
- Virology
- Cell Biology
- Immunology
Background:
- The current model of HIV entry details glycoprotein binding to CD4 and chemokine receptors, leading to membrane fusion.
- This model has been challenged by recent findings on target cell interactions and fusion kinetics.
Purpose of the Study:
- To review recent data on HIV entry mechanisms.
- To propose an updated model incorporating new findings.
Main Methods:
- Review of recent scientific literature on HIV viral entry.
- Analysis of kinetic data from fusion inhibitor experiments.
Main Results:
- Recent data highlight the involvement of membrane microdomains, actin polymerization, and glycosphingolipids in HIV entry.
- Kinetic studies reveal rate-limiting steps and add a temporal dimension to the entry process.
Conclusions:
- The existing HIV entry model needs significant updates.
- A comprehensive model should integrate cellular factors like membrane domains and signaling pathways, alongside temporal dynamics.