title: Oral administration of an immunodominant human collagen peptide modulates collagen-induced arthritis.
abstract: Human type II collagen (HuCII) may be one of the autoantigens involved in human rheumatoid arthritis (RA). By using over-lapping peptides, we have previously described an immunodominant region (HuCII.250-270) on HuCII. In the present study, this 21-mer HuCII.250-270 peptide was used as tolerogen, and its effect on both early and effector phase of collagen-induced arthritis (CIA) was examined. Upon immunization with HuCII-derived peptide 250-270, HuCII.250-270-tolerized mice showed diminished T cell proliferation that was mediated by Th1 cytokine, IL-2. More interestingly, oral tolerance with HuCII.250-270 peptide diminishes primarily a Th1 type of immune response. Arthritis severity was reduced markedly in mice orally tolerized with HuCII.250-270 peptide both at early and effector phases. Suppression of CIA at the effector phase by oral administration of HuCII peptide suggests a potential immunotherapeutic use of collagen II peptide in the treatment of human RA.
authors.affiliation: Department of Immunology, Mayo Clinic, Rochester, MN 55902, USA.
authors.forename: S D
authors.initials: SD
authors.lastname: Khare
authors.forename: C J
authors.initials: CJ
authors.lastname: Krco
authors.forename: M M
authors.initials: MM
authors.lastname: Griffiths
authors.forename: H S
authors.initials: HS
authors.lastname: Luthra
authors.forename: C S
authors.initials: CS
authors.lastname: David
mesh_terms: D000284:Administration, Oral; D000595:Amino Acid Sequence; D000818:Animals; D000917:Antibody Formation / Q000187:drug effects; D001168:Arthritis / Q000139:chemically induced / Q000188:drug therapy*; D003094:Collagen / Q000008:administration & dosage* / Q000737:chemistry / Q000276:immunology; D004195:Disease Models, Animal; D006801:Humans; D051379:Mice; D008811:Mice, Inbred DBA; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D003094:Collagen