Toll-like receptor 2 (TLR2) is a key mediator of the immune response to mycobacterial infections, and mutations in TLR2 have been shown to confer susceptibility to infection with mycobacteria. This study investigated the profiles of cytokines, such as interferon (IFN)-gamma, interleukin (IL)-10, IL-12 and tumour necrosis factor (TNF)-alpha in response to Mycobacterium leprae in peripheral blood mononuclear cells (PBMC) with the TLR2 mutation Arg677Trp, a recently reported polymorphism that is associated with lepromatous leprosy. In leprosy patients with the TLR2 mutation, production of IL-2, IL-12, IFN-gamma, and TNF-alpha by M. leprae-stimulated PBMC were significantly decreased compared with that in groups with wild-type TLR2. However, the cells from patients with the TLR2 mutation showed significantly increased production of IL-10. There was no significant difference in IL-4 production between the mutant and wild-type during stimulation. Thus, these results suggest that the TLR2 signal pathway plays a critical role in the alteration of cytokine profiles in PBMC from leprosy patients and the TLR2 mutation Arg677Trp provides a mechanism for the poor cellular immune response associated with lepromatous leprosy.
BT - Immunology C1 - http://www.ncbi.nlm.nih.gov/pubmed/15270740?dopt=Abstract CN - KANG 2004 DA - 2004 Aug DO - 10.1111/j.1365-2567.2004.01926.x IS - 4 J2 - Immunology LA - eng N2 -Toll-like receptor 2 (TLR2) is a key mediator of the immune response to mycobacterial infections, and mutations in TLR2 have been shown to confer susceptibility to infection with mycobacteria. This study investigated the profiles of cytokines, such as interferon (IFN)-gamma, interleukin (IL)-10, IL-12 and tumour necrosis factor (TNF)-alpha in response to Mycobacterium leprae in peripheral blood mononuclear cells (PBMC) with the TLR2 mutation Arg677Trp, a recently reported polymorphism that is associated with lepromatous leprosy. In leprosy patients with the TLR2 mutation, production of IL-2, IL-12, IFN-gamma, and TNF-alpha by M. leprae-stimulated PBMC were significantly decreased compared with that in groups with wild-type TLR2. However, the cells from patients with the TLR2 mutation showed significantly increased production of IL-10. There was no significant difference in IL-4 production between the mutant and wild-type during stimulation. Thus, these results suggest that the TLR2 signal pathway plays a critical role in the alteration of cytokine profiles in PBMC from leprosy patients and the TLR2 mutation Arg677Trp provides a mechanism for the poor cellular immune response associated with lepromatous leprosy.
PY - 2004 SP - 674 EP - 80 T2 - Immunology TI - Differential production of interleukin-10 and interleukin-12 in mononuclear cells from leprosy patients with a Toll-like receptor 2 mutation. VL - 112 SN - 0019-2805 ER -