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Strain variations in the murine cellular immune response to the phenolic glycolipid I antigen of Mycobacterium leprae.

ABSTRACT

The cellular immune response to the Mycobacterium leprae-specific phenolic glycolipid I was examined in inbred mice immunized with M. leprae by in vivo delayed cutaneous hypersensitivity and in vitro lymphocyte proliferation. Whereas all mouse strains responded to M.leprae-induced delayed-type hypersensitivity and lymphocyte proliferation, only BALB.K was responsive in both assays to the glycolipid. Responsiveness was determined in part by non-H-2 genes, while the influence of H-2 genes was not apparent. Among congenic BALB/c mice differing only at Igh-C allotype loci, variations in responsiveness were found in both delayed-type hypersensitivity and lymphocytes proliferation assays, indicating a possible role for Igh-C loci-linked genes. Unresponsiveness in the lymphocyte proliferation assay to the glycolipid was inherited as a dominant trait in one set of responder X nonresponder F1 progeny. We conclude that after immunization with M. leprae organisms, the cell-mediated responses to the glycolipid, endowed with a single carbohydrate epitope, are under polygenic control, predominantly non-H-2-linked genes.

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