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Leishmania donovani flagellum-specific epitopes mediating host-parasite interactions
1Department of Experimental Medicine, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
FEMS Immunology and Medical Microbiology
|March 1, 1994
Summary
Monoclonal antibodies targeting Leishmania donovani flagellar components reduced parasite attachment to macrophages. These flagellar epitopes are recognized by patients with visceral leishmaniasis, suggesting a role in host-parasite interactions.
Area of Science:
- Immunology
- Parasitology
- Molecular Biology
Background:
- Leishmania donovani causes visceral leishmaniasis.
- Understanding host-parasite interactions is crucial for disease control.
- Flagellar components are potential targets for therapeutic interventions.
Purpose of the Study:
- To develop monoclonal antibodies against Leishmania donovani flagellar components.
- To investigate the role of flagellar epitopes in parasite-host interactions.
- To assess the diagnostic potential of identified epitopes.
Main Methods:
- Development of monoclonal antibodies against Leishmania donovani promastigote flagella.
- Epitope mapping using Western blotting and immunofluorescence.
- Assay for parasite attachment to macrophages.
- Serological testing with human visceral leishmaniasis patient sera.
Main Results:
- Monoclonal antibody A11 (mAb A11) recognized flagellar polypeptides (86, 66, 53 kDa) distributed on the parasite.
- mAb A11 strongly agglutinated Leishmania donovani promastigotes.
- Pre-treatment with mAb A11 significantly reduced parasite attachment to macrophages (P < 0.001).
- Identified epitopes were recognized by sera from visceral leishmaniasis patients.
Conclusions:
- Flagellar-specific epitopes are involved in Leishmania donovani attachment to host macrophages.
- These epitopes may play a significant role in the pathogenesis of visceral leishmaniasis.
- Flagellar epitopes hold potential for diagnostic and therapeutic strategies against leishmaniasis.