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Published in: Cancer Immunology, Immunotherapy 7/2004

01-07-2004 | Original Article

α-Tocopheryl succinate sensitizes established tumors to vaccination with nonmatured dendritic cells

Authors: Lalitha V. Ramanathapuram, James J. Kobie, David Bearss, Claire M. Payne, Katrina T. Trevor, Emmanuel T. Akporiaye

Published in: Cancer Immunology, Immunotherapy | Issue 7/2004

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Abstract

Purpose: Dendritic cells (DCs) are considered potential candidates for cancer immunotherapy due to their ability to process and present antigens to T cells and stimulate immune responses. However, DC-based vaccines have exhibited minimal effectiveness against established tumors in mice and human cancer patients. The use of appropriate adjuvants can enhance the efficacy of DC-based cancer vaccines in treating established tumors. Methods: In this study we have employed α-tocopheryl succinate (α-TOS), a nontoxic esterified analogue of vitamin E, as an adjuvant to enhance the effectiveness of DC vaccines in treating established murine Lewis lung (3LL) carcinomas. Results: We demonstrate that locally or systemically administered α-TOS in combination with nonmatured DCs injected intratumorally (i.t.) or subcutaneously (s.c.) significantly inhibits the growth of preestablished 10-day tumors (mean tumor volume of 77.5 ± 17.8 mm3 on day 30 post–tumor injection) as compared to α-TOS alone (mean tumor volume of 471 ± 68 mm3 on day 30 post–tumor injection). Additionally, the adjuvant effect of α-TOS was superior to that of cyclophosphamide (CTX). The mean tumor volume on day 28 post–tumor injection in mice treated with CTX+DCs was 611 ± 94 mm3 as compared to 105 ± 36 mm3 in mice treated with α-TOS+DCs. Analysis of purified T lymphocytes from mice treated with α-TOS+DC revealed significantly increased secretion of IFN-γ as compared to T cells from the various control groups. Conclusion: This study demonstrates the potential usefulness of α-tocopheryl succinate, an agent nontoxic to normal cell types, as an adjuvant to augment the effectiveness of DC-based vaccines in treating established tumors.
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Metadata
Title
α-Tocopheryl succinate sensitizes established tumors to vaccination with nonmatured dendritic cells
Authors
Lalitha V. Ramanathapuram
James J. Kobie
David Bearss
Claire M. Payne
Katrina T. Trevor
Emmanuel T. Akporiaye
Publication date
01-07-2004
Publisher
Springer-Verlag
Published in
Cancer Immunology, Immunotherapy / Issue 7/2004
Print ISSN: 0340-7004
Electronic ISSN: 1432-0851
DOI
https://doi.org/10.1007/s00262-004-0499-7

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