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Replication-competent hybrids between murine leukemia virus and foamy virus
Evelina Shikova-Lekova1, Dirk Lindemann, Thomas Pietschmann
1Institut für Virologie, Medizinische Fakultät, Technische Universität Dresden, Dresden, Germany.
Journal of Virology
|June 14, 2003
Summary
Researchers engineered chimeric retroviruses combining murine leukemia viruses (MuLV) and foamy viruses (FV). These novel viruses exhibited altered host range, cytopathology, and ultrastructure, offering insights into retroviral envelope gene function.
Area of Science:
- Virology
- Molecular Biology
- Genetics
Background:
- Retroviridae comprises orthoretroviruses and spumaretroviruses with distinct biological properties.
- Understanding retroviral envelope (env) gene function is crucial for viral vector development and pathogenesis studies.
Purpose of the Study:
- To characterize replication-competent chimeric retroviruses combining MuLV and FV env genes.
- To investigate the functional role of leader peptides and envelope proteins in viral replication and host cell interactions.
Main Methods:
- Construction of chimeric retroviruses (ESL-1 to -4) with hybrid MuLV-FV env genes.
- Analysis of viral replication, host cell range, cytopathology, and ultrastructure.
- Genetic analysis to identify mutations affecting envelope protein synthesis.
Main Results:
- Chimeric viruses displayed an extended host cell range and FV-like cytopathology.
- Ultrastructural analysis revealed a combination of MuLV and FV features.
- A stop codon mutation in ESL-2 to -4 indicated FV leader peptide sufficiency for Env secretion.
Conclusions:
- Chimeric MuLV-FV retroviruses can be successfully constructed and exhibit unique biological properties.
- The FV leader peptide is sufficient for directing chimeric Env protein synthesis into the secretory pathway.
- These findings contribute to understanding retroviral envelope gene function and potential for novel viral vector design.