CD4+, CD8+ and CD4- CD8- T cell-subsets can confer protection against Leishmania m. mexicana infection.
We studied the role of CD4+, CD8+, CD4- CD8- T cells and IgG anti-Leishmania after infection or vaccination in the CBA/ca mouse. Mice were either infected with L. m. mexicana promastigotes or vaccinated with parasite-membrane antigens incorporated into liposomes. Successfully vaccinated mice were used as cell-donors in adoptive transfer experiments. Naive, syngeneic recipients received highly-enriched CD4+, CD8+ or CD4- CD8- T cells from those two set of donors and challenged with live parasites. Our results showed that, both CD4+ and CD8+ T cells from infected or vaccinated donors conferred significant disease-resistance to naive recipients. In addition, adoptive transfer of CD4- CD8- T cells from vaccinated donors significantly delayed lesion growth in recipient mice. We concluded that vaccination of CBA mice correlates with the induction of protective CD4+, CD8+ and CD4- CD8- T cells and the synthesis of IgG anti-Leishmania.
Centro de Investigaciónes en Enfermedades Tropicales, Universidad Autónoma de Campeche, México.
C M
CM
Lezama-Dávila
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G
Gallagher
D000818:Animals; D016516:CD4-CD8 Ratio; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology* / Q000469:parasitology; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology* / Q000469:parasitology; D004591:Electrophoresis, Polyacrylamide Gel; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D007074:Immunoglobulin G / Q000032:analysis; D007894:Leishmania mexicana / Q000276:immunology; D016773:Leishmaniasis, Cutaneous / Q000276:immunology*; D008297:Male; D051379:Mice; D008808:Mice, Inbred CBA; D014611:Vaccination
D007074:Immunoglobulin G