Published in:
01-05-2010 | Original Paper
Topoisomerase II alpha as a universal tumor antigen: antitumor immunity in murine tumor models and H-2Kb-restricted T cell epitope
Authors:
Jung-Sun Park, Hye-Sung Kim, Mi-Young Park, Chang-Hyun Kim, Yeun-Jun Chung, Yong-Kil Hong, Tai-Gyu Kim
Published in:
Cancer Immunology, Immunotherapy
|
Issue 5/2010
Login to get access
Abstract
Topoisomerase II alpha (Top2α) is an attractive candidate to be used as a tumor antigen for cancer immunotherapy, because it is abundantly expressed in various tumors and serves as a target for a number of chemotherapeutic agents. In this study, we demonstrated the immunogenicity of Top2α, using dendritic cells (DC) electroporated with RNA encoding the Top2α C-terminus (Top2αCRNA/DC). Top2αCRNA/DC were able to demonstrate in vitro stimulation of T cells from mice that were previously vaccinated with Top2α-expressing tumor lysate-pulsed DC. Vaccination with Top2αCRNA/DC induced Top2α-specific T cell responses in vivo as well as antitumor effects in various murine tumor models including MC-38, B16F10, and GL26. DC pulsed with p1327 (DSDEDFSGL), defined as an epitope presented by H-2Kb, also induced Top2α-specific immune responses and antitumor effects. Based on these data, Top2α is suggested to be a universal target for cancer immunotherapy.