Mycobacterial and mouse HSP70 have immuno-modulatory effects on dendritic cells

• Published in: Cell stress & chaperones 2013-07, Vol.18 (4), p.439-446
• Main Authors: Spiering, R., van der Zee, R., Wagenaar, J., van Eden, W., Broere, F.
• Format: Article
• Language: English
• Subjects: Animals; Antigens; Antiinflammatories; Arthritis; Arthritis - chemically induced; Arthritis - immunology; Arthritis - prevention & control; Bacterial Proteins - metabolism; Bacterial Proteins - pharmacology; Biochemistry; Biomedical and Life Sciences; Biomedicine; Bone Marrow Cells - cytology; Cancer Research; CD4-Positive T-Lymphocytes - immunology; CD4-Positive T-Lymphocytes - metabolism; Cell Biology; Cytokines; Cytokines - metabolism; Dendritic cells; Dendritic Cells - drug effects; Dendritic Cells - immunology; Dendritic Cells - metabolism; Endopeptidase K - metabolism; Female; Heat shock proteins; HSP70 Heat-Shock Proteins - metabolism; HSP70 Heat-Shock Proteins - pharmacology; Humans; Immunology; Interleukin-10 - metabolism; Lymphocyte Activation - immunology; Mice; Mice, Inbred BALB C; Mice, Transgenic; Mycobacterium; Mycobacterium - metabolism; Neurosciences; Original Paper; Ovalbumin - pharmacology; Peptide Fragments - pharmacology; Phenotype; Phenotypes; Proteoglycans - pharmacology; Secretion; Spleen; T lymphocytes
• ISSN: 1355-8145; 1466-1268
• DOI: 10.1007/s12192-012-0397-4

Previously, it has been shown that heat shock protein 70 (HSP70) can prevent inflammatory damage in experimental autoimmune disease models. Various possible underlying working mechanisms have been proposed. One possibility is that HSP70 induces a tolerogenic phenotype in dendritic cells (DCs) as a result of the direct interaction of the antigen with the DC. Tolerogenic DCs can induce antigen-specific regulatory T cells and dampen pathogenic T cell responses. We show that treatment of murine DCs with either mycobacterial (Mt) or mouse HSP70 and pulsed with the disease-inducing antigen induced suppression of proteoglycan-induced arthritis (PGIA), although mouse HSP70-treated DCs could ameliorate PGIA to a greater extent. In addition, while murine DCs treated with Mt- or mouse HSP70 had no significantly altered phenotype as compared to untreated DCs, HSP70-treated DCs pulsed with pOVA (ovalbumin peptide 323—339) induced a significantly increased production of IL-10 in pOVA-specific T cells. IL-10-producing T cells were earlier shown to be involved in Mt HSP70-induced suppression of PGIA. In conclusion, this study indicates that Mt- and mouse HSP70-treated BMDC can suppress PGIA via an IL-10-producing T cell-dependent manner.