Differential production of interleukin-10 and interleukin-12 in mononuclear cells from leprosy patients with a Toll-like receptor 2 mutation.
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.
Kang
Tae Jin
TJ
Institute of Hansen's Disease, Department of Pathology, College of Medicine, The Catholic University of Korea, 505 Banpo-Dong, Seocho-Gu, Seoul 137-701, Republic of Korea.
Yeum
Chung Eun
CE
Kim
Byoung Chul
BC
You
Eun-Young
EY
Chae
Gue-Tae
GT
D000328:Adult; D000368:Aged; D000818:Animals; D001483:Base Sequence; D005260:Female; D006801:Humans; D016753:Interleukin-10 / Q000096:biosynthesis*; D018664:Interleukin-12 / Q000096:biosynthesis*; D007918:Leprosy / Q000235:genetics / Q000276:immunology*; D007963:Leukocytes, Mononuclear / Q000276:immunology; D008297:Male; D008562:Membrane Glycoproteins / Q000235:genetics* / Q000378:metabolism; D051379:Mice; D008819:Mice, Nude; D008875:Middle Aged; D008969:Molecular Sequence Data; D017354:Point Mutation; D011956:Receptors, Cell Surface / Q000235:genetics* / Q000378:metabolism; D051195:Toll-Like Receptor 2; D051193:Toll-Like Receptors; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis
D008562:Membrane Glycoproteins; D011956:Receptors, Cell Surface; C495342:TLR2 protein, human; D051195:Toll-Like Receptor 2; D051193:Toll-Like Receptors; D014409:Tumor Necrosis Factor-alpha; D016753:Interleukin-10; D018664:Interleukin-12