title: Hsp40 proteins modulate humoral and cellular immune response in rheumatoid arthritis patients.
abstract: Recent research on the heat shock proteins (Hsps) in chronic inflammatory diseases indicates that Hsps may have disease-suppressive activities. Our aim was to characterize immune response directed to bacterial (DnaJ) and human Hsp40s in patients with rheumatoid arthritis (RA). We found elevated levels of anti-DnaJ, anti-Hdj2, and anti-Hdj3 (but not ant-Hdj1) serum antibodies in the RA patients (P < or = 0.001) compared to healthy controls. In peripheral blood mononuclear cells (PBMCs) culture, all tested Hsp40 proteins significantly inhibited the divisions of CD4+ and CD8+ T cells of the RA patients but not those of the controls. Both DnaJ and Hdj2 stimulated secretion of the main anti-inflammatory cytokine IL-10 by PBMCs of the RA patients (P < 0.05), and of IL-6 by PBMCs of the RA (P < 0.001) and control (P < 0.01) groups. DnaJ reduced TNFalpha secretion (P < 0.05) by both groups of PBMCs. Our results show for the first time that the RA patients have an increased humoral response to human Hsp40 proteins Hdj2 and Hdj3. This is also the first description of immunomodulatory effect of human Hsp40s on T cells and cytokine secretion in RA, suggesting that Hsp40s act as natural anti-inflammatory agents in RA.
authors.affiliation: Department of Biochemistry, University of Gdansk, Kladki 24, 80-822 Gdansk, Poland.
authors.forename: Stefan
authors.initials: S
authors.lastname: Tukaj
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Kotlarz
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Jozwik
authors.forename: Zaneta
authors.initials: Z
authors.lastname: Smolenska
authors.forename: Ewa
authors.initials: E
authors.lastname: Bryl
authors.forename: Jacek M
authors.initials: JM
authors.lastname: Witkowski
authors.forename: Barbara
authors.initials: B
authors.lastname: Lipinska
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001172:Arthritis, Rheumatoid / Q000276:immunology*; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D050956:HSP40 Heat-Shock Proteins / Q000276:immunology* / Q000494:pharmacology; D006801:Humans; D007111:Immunity, Cellular / Q000276:immunology*; D056724:Immunity, Humoral / Q000276:immunology*; D007963:Leukocytes, Mononuclear / Q000187:drug effects / Q000276:immunology; D008297:Male; D008875:Middle Aged; D055815:Young Adult
chemical_list: D050956:HSP40 Heat-Shock Proteins