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J Immunol. 2006 Jul 1;177(1):17-21.

Cutting edge: the silent chemokine receptor D6 is required for generating T cell responses that mediate experimental autoimmune encephalomyelitis.

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Neuroinflammation Research Center, Department of Neurosciences, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, USA.


D6, a promiscuous nonsignaling chemokine binding molecule expressed on the lymphatic endothelium, internalizes and degrades CC chemokines, and D6(-/-) mice demonstrated increased cutaneous inflammation following topical phorbol ester or CFA injection. We report that D6(-/-) mice were unexpectedly resistant to the induction of experimental autoimmune encephalomyelitis due to impaired encephalitogenic responses. Following induction with myelin oligodendroglial glycoprotein (MOG) peptide 35-55 in CFA, D6(-/-) mice showed reduced spinal cord inflammation and demyelination with lower incidence and severity of experimental autoimmune encephalomyelitis attacks as compared with D6(+/+) littermates. In adoptive transfer studies, MOG-primed D6(+/-) T cells equally mediated disease in D6(+/+) or D6(-/-) mice, whereas cells from D6(-/-) mice transferred disease poorly to D6(+/-) recipients. Lymph node cells from MOG-primed D6(-/-) mice showed weak proliferative responses and made reduced IFN-gamma but normal IL-5. CD11c(+) dendritic cells accumulated abnormally in cutaneous immunization sites of D6(-/-) mice. Surprisingly, D6, a "silent" chemokine receptor, supports immune response generation.

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