PMID- 19210880 OWN - NLM STAT- MEDLINE DCOM- 20090406 LR - 20170112 IS - 0392-856X (Print) IS - 0392-856X (Linking) VI - 26 IP - 6 DP - 2008 Nov-Dec TI - Serum levels of antibodies to Chlamydia pneumoniae and human HSP60 in giant cell arteritis patients. PG - 1107-10 AB - OBJECTIVE: To measure the serum levels of IgG anti-Chlamydia pneumoniae (C. pneumoniae) and human heat shock protein (hHSP) 60 antibodies in patients with active giant cell arteritis (GCA) and to determine whether such levels decrease with corticosteroid therapy and remission of symptoms. METHODS: IgG anti-C. pneumoniae and anti-hHSP60 antibodies were quantified by commercial and in-house ELISA tests, respectively, in serum samples from 17 GCA patients, 39 polymyalgia rheumatica (PMR) patients and 23 age-matched healthy subjects. RESULTS: Serum IgG anti-hHSP60, but not anti-C. pneumoniae, antibodies were significantly increased in GCA patients in comparison with PMR patients or healthy controls. After steroid therapy, both anti-hHSP60 and -C. pneumoniae antibodies decreased significantly in both groups of patients. CONCLUSIONS: Although some infectious agents have been suggested to participate in GCA pathogenesis, our data do not suggest that C. pneumoniae might be one of them. The production of anti-hHSP60 antibodies is shared in GCA with other systemic diseases and may be triggered by unknown infectious agents and/or other inflammatory factors. FAU - Lopez-Hoyos, M AU - Lopez-Hoyos M AD - Divisions of Immunology, Hospital Universitario Marques de Valdecilla, Spain. inmlhm@humv.es FAU - Alvarez, L AU - Alvarez L FAU - Ruiz Soto, M AU - Ruiz Soto M FAU - Blanco, R AU - Blanco R FAU - Jose Bartolome, M AU - Jose Bartolome M FAU - Martinez-Taboada, V M AU - Martinez-Taboada VM LA - eng PT - Journal Article PL - Italy TA - Clin Exp Rheumatol JT - Clinical and experimental rheumatology JID - 8308521 RN - 0 (Antibodies, Bacterial) RN - 0 (Autoantibodies) RN - 0 (Chaperonin 60) RN - 0 (Immunoglobulin G) RN - 0 (Steroids) SB - IM MH - Aged MH - Antibodies, Bacterial/blood MH - Autoantibodies/*blood MH - Chaperonin 60/*immunology MH - Chlamydophila Infections/*immunology MH - Chlamydophila pneumoniae/*immunology MH - Female MH - Giant Cell Arteritis/drug therapy/epidemiology/*immunology MH - Humans MH - Immunoglobulin G/blood MH - Male MH - Polymyalgia Rheumatica/drug therapy/epidemiology/immunology MH - Remission Induction MH - Risk Factors MH - Seroepidemiologic Studies MH - Steroids/therapeutic use EDAT- 2009/02/13 09:00 MHDA- 2009/04/07 09:00 CRDT- 2009/02/13 09:00 PHST- 2009/02/13 09:00 [entrez] PHST- 2009/02/13 09:00 [pubmed] PHST- 2009/04/07 09:00 [medline] AID - 2533 [pii] PST - ppublish SO - Clin Exp Rheumatol. 2008 Nov-Dec;26(6):1107-10.