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Soluble interferon-gamma receptors encoded by poxviruses
Comparative Immunology, Microbiology and Infectious Diseases
|September 1, 1996
Summary
Poxviruses secrete a soluble interferon-gamma receptor (IFN-gamma R) to block host immune responses. This viral protein
Area of Science:
- Virology
- Immunology
- Evolutionary Biology
Background:
- Poxviruses encode proteins that evade host immune responses.
- A secreted soluble interferon-gamma receptor (IFN-gamma R) inhibits interferon-gamma (IFN-gamma) signaling.
- IFN-gamma R is conserved across poxviruses, indicating its importance in pathogenesis.
Purpose of the Study:
- To investigate the evolutionary relationship between poxviruses and their hosts using species-specific IFN-gamma R.
- To analyze the species specificity of IFN-gamma R from different poxvirus families.
Main Methods:
- Analysis of poxvirus-encoded soluble interferon-gamma receptors.
- Comparison of species specificity of IFN-gamma R from myxoma virus and orthopoxviruses.
Main Results:
- Myxoma virus IFN-gamma R is specific to rabbit IFN-gamma.
- Orthopoxvirus IFN-gamma R exhibits broad species specificity across multiple hosts.
- This broad specificity suggests co-evolution with several host species.
Conclusions:
- Poxvirus IFN-gamma R's species specificity provides insights into viral evolution.
- The broad specificity of orthopoxvirus IFN-gamma R implies adaptation to diverse hosts.
- Findings have implications for understanding the origin and natural hosts of vaccinia virus.