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Monoclonal antibodies specific for members of the genus Endotrypanum
1Department of Epidemiology and Public Health, Yale University School of Medicine, New Haven, Connecticut 06510.
Abstract:
Twenty-six monoclonal antibodies were produced against membrane-enriched preparations of Endotrypanum schaudinni or Endotrypanum sp. promastigotes. Fifteen of these monoclonal antibodies (E1-E15) reacted only with the standard strain of E. schaudinni, M6159. Monoclonal antibodies E16-E26 were considered Endotrypanum specific; no cross reactivity was detected with any other genus of the family Trypanosomatidae (Leishmania, Trypanosoma, Leptomonas, Herpetomonas or Crithidia) by dot-blot radioimmune assay. By indirect immunofluorescence assay, the antigens recognized by Endotrypanum specific monoclonal antibodies appear to be associated with the surface of the parasite. Based on Western blot analysis, 4 antigenic molecules ranging in molecular weight from 24 kD to 160 kD were identified by monoclonal antibodies specific for the strain of E. schaudinni, M6159. Monoclonal antibodies specific for the genus Endotrypanum identified an antigen of molecular weight 48 kD as well as a diffuse component migrating with an apparent molecular weight of 64-200 kD.
Insights
Researchers developed 26 monoclonal antibodies targeting Endotrypanum parasites. Specific antibodies identified distinct surface antigens, aiding in the genus and strain characterization of Endotrypanum schaudinni.
Area of Science:
- Immunology
- Parasitology
- Molecular Biology
Background:
- Endotrypanum is a genus of kinetoplastid protozoan parasites.
- Characterizing parasite surface antigens is crucial for understanding host-parasite interactions and developing diagnostics.
Purpose of the Study:
- To generate and characterize monoclonal antibodies against Endotrypanum promastigotes.
- To identify specific and genus-specific antigens of Endotrypanum.
Main Methods:
- Production of monoclonal antibodies against Endotrypanum schaudinni and Endotrypanum sp. promastigotes.
- Dot-blot radioimmune assay for cross-reactivity testing.
- Indirect immunofluorescence assay for antigen localization.
- Western blot analysis for molecular weight determination.
Main Results:
- Fifteen monoclonal antibodies (E1-E15) were specific for the E. schaudinni M6159 strain.
- Eleven monoclonal antibodies (E16-E26) were specific for the Endotrypanum genus, showing no cross-reactivity with other Trypanosomatidae.
- Antigens identified by strain-specific antibodies ranged from 24 kD to 160 kD.
- Genus-specific antibodies recognized a 48 kD antigen and a diffuse 64-200 kD component on the parasite surface.
Conclusions:
- Monoclonal antibodies provide valuable tools for differentiating Endotrypanum species and strains.
- Surface-associated antigens of Endotrypanum have been characterized, offering potential targets for further research.