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. 1992 Jul;89(1):110–114. doi: 10.1111/j.1365-2249.1992.tb06887.x

Cellular immune response to the cell walls of Mycobacterium leprae in leprosy patients and healthy subjects exposed to leprosy.

P W Roche 1, K D Neupane 1, W J Britton 1
PMCID: PMC1554417  PMID: 1628419

Abstract

Cell walls of M. leprae consist of complex arrangements of carbohydrate, lipid, peptidoglycan and protein molecules. Recently, extractable proteins of a wide range of molecular weights were identified as components of the cell wall. We have examined the cellular immune responses of Nepali leprosy patients to a cell wall preparation of M. leprae enriched for these proteins. Strong lymphocyte proliferative responses to the antigens were present in half of the paucibacillary leprosy patients and in the majority of healthy control subjects with occupational exposure to leprosy. Patients with multibacillary disease responded poorly and patients with tuberculosis had intermediate responses. Proliferative responses to the cell wall protein fraction were strongly correlated to the proliferative responses to sonicates of the whole leprosy bacillus. Immunization of mice with cell wall proteins resulted in inhibition of growth of M. leprae following foot-pad inoculation with viable organisms. Therefore cell-mediated immune responses to the extractable proteins of the cell wall may play a role in protective immunity against M. leprae infection.

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Selected References

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