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© Research
Publication : The Journal of experimental medicine

A subset of liver NK T cells is activated during Leishmania donovani infection by CD1d-bound lipophosphoglycan

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in The Journal of experimental medicine - 01 Oct 2004

Amprey JL, Im JS, Turco SJ, Murray HW, Illarionov PA, Besra GS, Porcelli SA, Späth GF

Link to Pubmed [PMID] – 15466622

J. Exp. Med. 2004 Oct;200(7):895-904

Natural killer (NK) T cells are activated by synthetic or self-glycolipids and implicated in innate host resistance to a range of viral, bacterial, and protozoan pathogens. Despite the immunogenicity of microbial lipoglycans and their promiscuous binding to CD1d, no pathogen-derived glycolipid antigen presented by this pathway has been identified to date. In the current work, we show increased susceptibility of NK T cell-deficient CD1d(-/-) mice to Leishmania donovani infection and Leishmania-induced CD1d-dependent activation of NK T cells in wild-type animals. The elicited response was Th1 polarized, occurred as early as 2 h after infection, and was independent from IL-12. The Leishmania surface glycoconjugate lipophosphoglycan, as well as related glycoinositol phospholipids, bound with high affinity to CD1d and induced a CD1d-dependent IFNgamma response in naive intrahepatic lymphocytes. Together, these data identify Leishmania surface glycoconjugates as potential glycolipid antigens and suggest an important role for the CD1d-NK T cell immune axis in the early response to visceral Leishmania infection.

http://www.ncbi.nlm.nih.gov/pubmed/15466622