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Enhancing antitumor immune responses: intracellular peptide delivery and identification of MHC class II-restricted tumor antigens

Authors


Rong-Fu Wang, The Center for Cell and Gene Therapy and Department of Immunology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
Tel: + 1 713 798 1244
Fax: + 1 713 798 1263
e-mail: rongfuw@bcm.tmc.edu

Abstract

Summary: The importance of T-cell-mediated antitumor immunity has been demonstrated in both animal models and human cancer therapy. The identification of major histocompatibility complex (MHC) class I-restricted tumor antigens has generated a resurgence of interest in immunotherapy for cancer. However, recent studies suggest that therapeutic strategies that have mainly focused on the use of CD8+ T cells (and MHC class I-restricted tumor antigens) may not be effective in eliminating cancer cells in patients. Novel strategies have been developed for enhancing T-cell responses against cancer by prolonging antigen presentation of dendritic cells to T cells and the inclusion of MHC class II-restricted tumor antigens. identification of MHC class II-restricted tumor antigens, which are capable of stimulating CD4+ T cells, not only aids our understanding of the host immune responses against cancer antigens, but also provides opportunities for developing effective cancer vaccines.

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