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Infectious particles derived from Semliki Forest virus vectors encoding murine leukemia virus envelopes
I Lebedeva1, K Fujita, A Nihrane
1Laboratory of Molecular Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA.
Journal of Virology
|September 1, 1997
Summary
Researchers engineered Semliki Forest virus vectors to create "minimal" viruses. These particles efficiently deliver RNA to target cells, offering potential for retroviral vaccines and studying virus evolution.
Area of Science:
- Virology
- Molecular Biology
- Immunology
Background:
- Semliki Forest virus (SFV) is an alphavirus commonly used as a vector in molecular biology.
- Murine leukemia virus (MLV) is a gammaretrovirus known for its envelope protein mediating cell entry.
- Truncating the cytoplasmic tail of viral envelope proteins can alter particle formation and release.
Purpose of the Study:
- To engineer novel viral vectors with specific cell-targeting capabilities.
- To investigate the properties of minimal viral particles generated from SFV vectors.
- To explore potential applications of these minimal viruses in vaccinology and evolutionary studies.
Main Methods:
- SFV vectors were constructed to encode the MLV envelope protein with a truncated cytoplasmic tail.
- The resulting viral particles were characterized for size, cell association, and RNA content.
- Transduction efficiency was assessed in cells expressing the MLV receptor.
Main Results:
- The engineered SFV vectors produced submicrometer, cell-associated membranous particles.
- These particles specifically transmitted replication-competent vector RNA to cells expressing the MLV receptor.
- The truncated MLV envelope protein facilitated targeted RNA delivery.
Conclusions:
- Minimal viral particles derived from SFV vectors can efficiently and specifically deliver genetic cargo.
- These engineered viruses hold promise as next-generation retroviral vaccines.
- Further research into these minimal viruses can advance our understanding of virus evolution.