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  • Hansson, GK, et al. (author)
  • Atherosclerosis and the immune system
  • 2004
  • In: Acta paediatrica (Oslo, Norway : 1992). Supplement. - : Wiley. - 0803-5326 .- 0803-5253. ; 93:446, s. 63-69
  • Journal article (peer-reviewed)
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  • Tupin, E, et al. (author)
  • CD1d-dependent activation of NKT cells aggravates atherosclerosis
  • 2004
  • In: The Journal of experimental medicine. - : Rockefeller University Press. - 0022-1007 .- 1540-9538. ; 199:3, s. 417-422
  • Journal article (peer-reviewed)abstract
    • Adaptive and innate immunity have been implicated in the pathogenesis of atherosclerosis. Given their abundance in the lesion, lipids might be targets of the atherosclerosis-associated immune response. Natural killer T (NKT) cells can recognize lipid antigens presented by CD1 molecules. We have explored the role of CD1d-restricted NKT cells in atherosclerosis by using apolipoprotein E–deficient (apoE−/−) mice, a hypercholesterolemic mouse model that develops atherosclerosis. ApoE−/− mice crossed with CD1d−/− (CD1d−/−apoE−/−) mice exhibited a 25% decrease in lesion size compared with apoE−/− mice. Administration of α-galactosylceramide, a synthetic glycolipid that activates NKT cells via CD1d, induced a 50% increase in lesion size in apoE−/− mice, whereas it did not affect lesion size in apoE−/−CD1d−/− mice. Treatment was accompanied by an early burst of cytokines (IFNγ, MCP-1, TNFα, IL-2, IL-4, IL-5, and IL-6) followed by sustained increases in IFNγ and IL-4 transcripts in the spleen and aorta. Early activation of both T and B cells was followed by recruitment of T and NKT cells to the aorta and activation of inflammatory genes. These results show that activation of CD1d-restricted NKT cells exacerbates atherosclerosis.
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