title: Requirement of the Fc receptor common gamma-chain for gamma delta T cell-mediated promotion of murine experimental autoimmune encephalomyelitis.
abstract: Immunoglobulin Fcgamma receptors (FcgammaR) are comprised of a ligand-binding alpha-chain that sometimes associates with a cell signaling common gamma-chain. These receptors comprise an important family of effector molecules that link humoral and cell-mediated adaptive immunity and regulate innate immunity. Recent animal studies suggest that FcgammaR in general, and FcR alpha-chains in particular, are required for full development of experimental autoimmune encephalomyelitis (EAE). We show here that deletion of the gamma-chain renders mice resistant to EAE, whereas deletion of the alpha-chains of FcgammaRI, FcgammaRIIB and FcgammaRIII has no protective effect. Susceptibility to EAE is fully restored in common gamma-chain-/- mice into which wild-type splenocytes are adoptively transferred, but EAE is not restored in common gamma-chain-/- mice given wild-type splenocytes depleted of gammadelta T cells. These data indicate that although the common gamma-chain is required for full development of EAE in mice, this requirement is likely FcgammaR alpha-chain-independent. Expression of the common gamma-chain by gammadelta T cells, probably in conjunction with the T cell receptor/CD3 complex, is likely the key requirement for full development of EAE.
authors.affiliation: Department of Medicine at The University of Alabama at Birmingham, Birmingham, AL 35294, USA.
authors.forename: Alexander J
authors.initials: AJ
authors.lastname: Szalai
authors.forename: Xianzhen
authors.initials: X
authors.lastname: Hu
authors.forename: Chander
authors.initials: C
authors.lastname: Raman
authors.forename: Scott R
authors.initials: SR
authors.lastname: Barnum
mesh_terms: D000818:Animals; D015703:Antigens, CD / Q000235:genetics / Q000502:physiology; D017252:CD3 Complex / Q000502:physiology; D002908:Chronic Disease; D018450:Disease Progression; D004681:Encephalomyelitis, Autoimmune, Experimental / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D020022:Genetic Predisposition to Disease; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D016692:Receptors, Antigen, T-Cell, gamma-delta / Q000172:deficiency / Q000235:genetics / Q000502:physiology*; D011961:Receptors, Fc / Q000172:deficiency / Q000235:genetics / Q000502:physiology*; D016176:T-Lymphocyte Subsets / Q000276:immunology* / Q000378:metabolism / Q000637:transplantation
chemical_list: D015703:Antigens, CD; D017252:CD3 Complex; C036832:Fc(alpha) receptor; D016692:Receptors, Antigen, T-Cell, gamma-delta; D011961:Receptors, Fc