HLA-DR polymorphism modulates the cytokine profile of Mycobacterium leprae HSP-reactive CD4+ T cells

D. K. Mitra, R. Rajalingam, Veena D Taneja, B. C. Bhattacharyya, N. K. Mehra

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

In the present study, in vitro attempts have been made to define the cytokine profile of CD4+ T cells from polar leprosy patients and healthy individuals against Mycobacterium leprae-derived heat shock proteins (HSPs), HSP65 and HSP18, and their trypsin-digested fragments, relating to HLA-DR polymorphism. While all tryptic fragments of optimal digestion and undigested HSPs could stimulate CD4+ T cells from tuberculoid (TT) leprosy patients and healthy contacts (stimulation index, SI > 2.0), only two fragments, TDB65-2 (18 kDa) and TDB18-3 (3 kDa) triggered CD4+ T cells of anergic lepromatous (LL) leprosy patients. Both of these HSPs and their tryptic fragments showed diverse HLA-DR restriction, with DR15 providing the strongest restriction. Cytokine analysis demonstrated that HSP65 and HSP18 induced Th1-like activity in the context of all the restricting HLA-DR alleles, except DR1 and DR7 which induced a Th2 type of response against HSP65 and HSP18, respectively. These Th2 inducer epitopes on HSP65 (DR1 restricted) and HSP18 (DR7 restricted) were absent from TDB65-2 and TDB18-3 which exclusively triggered Th1 cells in both TT and LL forms of leprosy in the context of multiple DR alleles, DR15 being the major antigen-presenting allele. These studies suggest that the major histocompatibility complex phenotype of the antigen-presenting cell can modulate Th1-like versus Th2-like activity against M. leprae pathogens in leprosy and healthy individuals.

Original languageEnglish (US)
Pages (from-to)60-67
Number of pages8
JournalClinical Immunology and Immunopathology
Volume82
Issue number1
DOIs
StatePublished - Jan 1997
Externally publishedYes

Fingerprint

Mycobacterium leprae
HLA-DR Antigens
Leprosy
Heat-Shock Proteins
Alleles
Cytokines
T-Lymphocytes
Tuberculoid Leprosy
Lepromatous Leprosy
Th1 Cells
Antigen-Presenting Cells
Major Histocompatibility Complex
Trypsin
Epitopes
Digestion
Phenotype
Antigens

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology
  • Pathology and Forensic Medicine

Cite this

HLA-DR polymorphism modulates the cytokine profile of Mycobacterium leprae HSP-reactive CD4+ T cells. / Mitra, D. K.; Rajalingam, R.; Taneja, Veena D; Bhattacharyya, B. C.; Mehra, N. K.

In: Clinical Immunology and Immunopathology, Vol. 82, No. 1, 01.1997, p. 60-67.

Research output: Contribution to journalArticle

Mitra, D. K. ; Rajalingam, R. ; Taneja, Veena D ; Bhattacharyya, B. C. ; Mehra, N. K. / HLA-DR polymorphism modulates the cytokine profile of Mycobacterium leprae HSP-reactive CD4+ T cells. In: Clinical Immunology and Immunopathology. 1997 ; Vol. 82, No. 1. pp. 60-67.
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