PMID- 15556682 OWN - NLM STAT- MEDLINE DCOM- 20051017 LR - 20081121 IS - 0198-8859 (Print) IS - 0198-8859 (Linking) VI - 65 IP - 11 DP - 2004 Nov TI - CD25+ regulatory cells from HLA-DQ8 transgenic mice are capable of modulating collagen-induced arthritis. PG - 1319-27 AB - In the last decade, CD4+CD25+ T regulatory cells have been implicated in the protection against autoimmune diseases. The human DQ8 major histocompatibility complex (MHC) class II molecule is associated with rheumatoid arthritis (RA) and various other autoimmune diseases in humans. The human leukocyte antigen (HLA)-DQ8 transgenic mouse, containing the human DQ8 MHC class II molecule, is predisposed toward collagen-induced arthritis. However, the biologic pathways responsible for DQ8-associated autoimmunity have yet to be defined, including possible defects in the CD4+CD25+ T regulatory cell compartment. To explore this concept, we examined the suppressive capacity of CD4+CD25+ T regulatory cells from DQ8 transgenic mice in vitro and, using CD25-specific depleting antibodies, investigated their influence on collagen-induced arthritis in vivo. CD4+CD25+ T regulatory cells isolated from DQ8 transgenic mice were found to be sufficient suppressors of splenocyte proliferation and interferon (INF)-gamma production. Furthermore, depletion of these cells before immunization led to significant increases in arthritis severity, collagen-specific antibodies, and INF-gamma production. These results indicate that HLA-DQ8 mice contain naturally occurring CD25+ regulatory cells that modulate collagen-induced arthritis and imply that DQ8 expression does not hinder the development of CD25+ T regulatory cells. FAU - Morgan, Mary E AU - Morgan ME AD - Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands. m.morgan@ncmls.kun.nl FAU - Witteveen, Hendrik J AU - Witteveen HJ FAU - Sutmuller, Roger P M AU - Sutmuller RP FAU - de Vries, Rene R P AU - de Vries RR FAU - Toes, Rene E M AU - Toes RE LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Hum Immunol JT - Human immunology JID - 8010936 RN - 0 (Antibodies) RN - 0 (Collagen Type II) RN - 0 (HLA-DQ Antigens) RN - 0 (HLA-DQ8 antigen) RN - 0 (Receptors, Interleukin-2) RN - 82115-62-6 (Interferon-gamma) SB - IM MH - Animals MH - Antibodies/blood/immunology MH - Arthritis, Experimental/etiology/*immunology MH - CD4-Positive T-Lymphocytes/cytology/*immunology MH - Collagen Type II/immunology MH - HLA-DQ Antigens/*genetics/immunology MH - Humans MH - Immune Tolerance/immunology MH - Interferon-gamma/metabolism MH - Lymphocyte Activation/immunology MH - Lymphocyte Depletion MH - Male MH - Mice MH - Mice, Inbred DBA MH - Mice, Transgenic MH - Receptors, Interleukin-2/*immunology MH - T-Lymphocytes/metabolism EDAT- 2004/11/24 09:00 MHDA- 2005/10/18 09:00 CRDT- 2004/11/24 09:00 PHST- 2004/04/08 00:00 [received] PHST- 2004/06/24 00:00 [revised] PHST- 2004/06/30 00:00 [accepted] PHST- 2004/11/24 09:00 [pubmed] PHST- 2005/10/18 09:00 [medline] PHST- 2004/11/24 09:00 [entrez] AID - S0198-8859(04)00158-2 [pii] AID - 10.1016/j.humimm.2004.06.011 [doi] PST - ppublish SO - Hum Immunol. 2004 Nov;65(11):1319-27. doi: 10.1016/j.humimm.2004.06.011.