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International Immunology, Vol. 16, No. 4, pp. 615-624, April 2004
© 2004 Japanese Society for Immunology

FEATURED ARTICLE OF THE MONTH

Immune modulation with high-dose heat-shock protein gp96: therapy of murine autoimmune diabetes and encephalomyelitis

Rajiv Y. Chandawarkar, Mihir S. Wagh, Joseph T. Kovalchin and Pramod Srivastava

Center for Immunotherapy of Cancer and Infectious Diseases, University of Connecticut School of Medicine, Farmington, CT 06030-1601, USA

Correspondence to: P. Srivastava; E-mail: Srivastava{at}nso2.uchc.edu
Transmitting editor: R. D. Schreiber

Immunization with heat-shock protein (HSP) gp96 elicits protective immunity to the cancer or virus-infected cells from which it is derived. Low doses of gp96 generate immunity, while doses 10 times the immunizing dose do not. We show here that injection of high doses of gp96 generates CD4+ T cells that down-regulate a variety of ongoing immune responses. Immunization with high doses of gp96 prevents myelin basic protein- or proteolipid protein-induced autoimmune encephalomyelitis in SJL mice and the onset of diabetes in non-obese diabetic mice. The suppression of immune response can be adoptively transferred with CD4+ cells and does not partition with the CD25 phenotype. The immunomodulatory properties of gp96 (and possibly other HSP) may be used for antigen-specific activation or suppression of cellular immune responses. The latter may form the basis for novel immunotherapies for autoimmune diseases.

Keywords: CD4+ T cell, CD25, suppressor T cell, tolerance, tumor immunity


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