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Folly Beach Library
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Wando Mount Pleasant Library
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Enhanced T-cell immunity induced by dendritic cells with phagocytosis of heat shock protein 70 gene-transfected tumor cells in early phase of apoptosis.
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- Author(s): Chan, T.; Chen, Z.; Hao, S.; Xu, S.; Yuan, J.; Saxena, A.; Qureshi, M.; Zheng, C.; Xiang, J.
- Source:
Cancer Gene Therapy; Apr2007, Vol. 14 Issue 4, p409-420, 12p, 1 Black and White Photograph, 1 Chart, 6 Graphs- Subject Terms:
- Source:
- Additional Information
- Abstract: The dual role of heat shock protein 70 (HSP70), as antigenic peptide chaperone and danger signal, makes it especially important in dendritic cell (DC)-based vaccination. In this study, we investigated the impacts of apoptotic transgenic MCA/HSP tumor cells expressing HSP70 on DC maturation, T-cell stimulation and vaccine efficacy. We found that DCs with phagocytosis of MCA/HSP in early phase of apoptosis expressed more pMHC I complexes, stimulated stronger cytotoxic T lymphocyte (CTL) responses (40% specific killing at an E:T cell ratio of 50) and induced immune protection in 90% of mice against MCA tumor cell challenge, compared with 25% specific CTL killing activity and 60% immune protection seen in mice immunized with DC with phagocytosis of MCA/HSP in late phase of apoptosis (P<0.05). Similar results were confirmed in another EG7 tumor model also expressing HSP70. Taken together, our data demonstrate that HSP70 on apoptotic tumor cells stimulate DC maturation, and DC with phagocytosis of apoptotic tumor cells expressing HSP70 in early phase of apoptosis more efficiently induced tumor-specific CTL responses and immunity than DCs with phagocytosis of apoptotic tumor cells in late phase of apoptosis. These results may have an important impact in designing DC-based antitumor vaccines.Cancer Gene Therapy (2007) 14, 409–420. doi:10.1038/sj.cgt.7701025; published online 19 January 2007 [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Cancer Gene Therapy is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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