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Antigenic signature analysis reflects differences among plant virus isolates
R Di1, J H Hill, R A Van Deusen
1Department of Plant Pathology, Iowa State University, Ames 50011.
Journal of Virological Methods
|May 1, 1993
Summary
Signature analysis effectively identified subtle antigenic differences among cowpea severe mosaic virus (CPSMV) isolates. This method uses monoclonal antibodies and plant extracts, requiring no purified virus or known concentration.
Area of Science:
- Plant Virology
- Immunology
- Biochemistry
Background:
- Cowpea severe mosaic virus (CPSMV) exhibits antigenic variability among its isolates.
- Characterizing these differences is crucial for understanding viral evolution and disease management.
Purpose of the Study:
- To develop and validate a novel method for detecting subtle antigenic differences among CPSMV isolates.
- To demonstrate the utility of signature analysis for viral characterization.
Main Methods:
- Utilized signature analysis with a panel of seven monoclonal antibodies.
- Generated binding curves by reacting serial dilutions of infected plant extracts with antibodies.
- Employed an iterative procedure to align antigen concentrations for comparative analysis.
Main Results:
- Signature analysis clearly reflected antigenic differences among CPSMV isolates.
- The method successfully generated distinct binding profiles for different viral antigens.
- Demonstrated the ability to compare binding profiles across different assays.
Conclusions:
- Signature analysis is a powerful tool for elucidating subtle antigenic variations in viruses.
- This technique does not require purified virus or knowledge of viral concentration in host tissues.
- Offers a valuable approach for viral isolate characterization and diagnostics.