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Characterization of human serotype 1 astrovirus-neutralizing epitopes
1Department of Pediatrics and Center for Digestive Disease, Stanford University, California 94305-5119, USA. Dorsey.Bass@Forsythe.Stanford.edu
Journal of Virology
|October 29, 1997
Summary
Monoclonal antibodies targeting astrovirus capsid protein VP29 are crucial for neutralization and preventing viral attachment. These antibodies offer insights into protective immunity against pediatric gastroenteritis agents.
Area of Science:
- Virology
- Immunology
- Molecular Biology
Background:
- Human astroviruses are significant causes of pediatric gastroenteritis.
- Understanding astrovirus antigenic structure is key to developing effective immunity strategies.
Purpose of the Study:
- To generate and characterize monoclonal antibodies (MAbs) against human astrovirus serotype 1.
- To investigate the role of specific astrovirus proteins in viral neutralization, immunity, and cell attachment.
Main Methods:
- Production and characterization of MAbs against human astrovirus.
- Enzyme-linked immunosorbent assay (ELISA) and immunoperoxidase staining for MAb reactivity.
- Immunoprecipitation and competition ELISA to identify antibody targets and epitope proximity.
- Neutralization assays and virus attachment inhibition studies.
Main Results:
- Four MAbs were generated; three exhibited potent neutralizing activity.
- Neutralizing MAbs targeted the VP29 capsid protein, with one also recognizing VP26.
- Epitopes for neutralizing MAbs were in close proximity on the virion.
- Neutralizing MAbs inhibited astrovirus attachment to Caco-2 intestinal cells.
Conclusions:
- Astrovirus capsid protein VP29 is a potential target for viral neutralization and heterotypic immunity.
- VP29 plays a role in astrovirus attachment to host cells.
- MAbs targeting VP29 provide valuable tools for studying astrovirus pathogenesis and immunity.