CD28-mediated T cell response is upregulated by exogenous application of autologous Hsp70–peptide complex in a tumor-bearing host
Hsp70, a highly conserved protein, has gained plenty of attention by virtue of its adjuvant capability to induce peptide-specific cytotoxic T lymphocyte responses. In this study, we have investigated the effect of autologous Hsp70–peptide complex (or simply autologous Hsp70) on the expression of CD2...
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Published in | Immunologic research Vol. 64; no. 1; pp. 313 - 323 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
New York
Springer US
01.02.2016
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Hsp70, a highly conserved protein, has gained plenty of attention by virtue of its adjuvant capability to induce peptide-specific cytotoxic T lymphocyte responses. In this study, we have investigated the effect of autologous Hsp70–peptide complex (or simply autologous Hsp70) on the expression of CD28 on T cells and its effector functions through macrophage activation. Further, we investigated the effect of Hsp70 on the expression of CD80 and CD86 on macrophages isolated from normal and tumor-bearing host to provide costimulatory signal for T cell activation and secretion of IL-2 and IFN-γ during interaction. We found that treatment of autologous Hsp70 effectively activated TAMs to induce higher expression of CD28 on T cells through T cells–macrophage interaction. Treatment of autologous Hsp70 induces higher expression of CD80 and CD86 on TAMs, as a result, increases B7/CD28 interaction, which in turns activates T cells and induces higher production of IL-2 and IFN-γ, thereby increasing antigen-specific T cell proliferation. With our novel study, we have provided the strong insights into the role of extracellular Hsp70 on the expression of CD28 costimulatory molecule on T cells, which helps in the activation and generation of antigen-specific T cell effector functions in a tumor-bearing host to curb malignancy. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0257-277X 1559-0755 |
DOI: | 10.1007/s12026-015-8752-z |