Related Experiment Videos
Mechanisms of enveloped RNA virus budding
Owen Pornillos1, Jennifer E Garrus, Wesley I Sundquist
1Dept of Biochemistry, University of Utah, Salt Lake City, UT 84132, USA.
Trends in Cell Biology
|December 24, 2002
Summary
Enveloped viruses like HIV hijack cellular machinery to bud from host cells. This process involves multivesicular bodies, offering new insights into viral spread and cell biology.
Area of Science:
- Virology
- Cell Biology
- Molecular Biology
Background:
- Enveloped viruses require budding from host cells to propagate infection.
- Viral budding mechanisms are crucial for understanding pathogenesis and developing antivirals.
Purpose of the Study:
- To elucidate the mechanism by which enveloped viruses, including HIV, bud from infected host cells.
- To investigate the role of cellular machinery in viral egress.
Main Methods:
- The study likely involves advanced microscopy and biochemical assays to visualize and analyze viral budding processes.
- Comparative analysis of viral budding in different cell types and conditions.
Main Results:
- Enveloped viruses, such as HIV (Human Immunodeficiency Virus), utilize the host cell's machinery for forming multivesicular bodies (MVBs).
- Viral budding occurs by hijacking the endosomal sorting complex required for transport (ESCRT) pathway, normally involved in MVB formation.
- This appropriation of cellular machinery facilitates the release of infectious viral particles.
Conclusions:
- A novel model suggests enveloped RNA viruses bud by co-opting the host cell's MVB pathway.
- This mechanism has significant implications for understanding viral pathogenesis and host-pathogen interactions.
- The findings open new avenues for therapeutic strategies targeting viral budding.