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http://dx.doi.org/10.4110/in.2010.10.6.206

Induction of 90K-specific Cytotoxic T Lymphocytes for Colon Cancer Immunotherapy  

Lee, Ji-Hee (Department of Oncology, Chonnam National University Hwasun Hospital)
Park, Myung-Suk (Department of Oncology, Chonnam National University Hwasun Hospital)
Chung, Ik-Joo (Department of Oncology, Chonnam National University Hwasun Hospital)
Publication Information
IMMUNE NETWORK / v.10, no.6, 2010 , pp. 206-211 More about this Journal
Abstract
Background: Dendritic cell (DC)-based tumor vaccine is an attractive modality for the treatment of colon cancer because it has been recurred and produced few side effects in patients. Secretory glycoprotein 90K has been found at elevated level in various cancer tissues and sera. We investigated to establish a more effective DC vaccine for the treatment of colon cancer in which the levels of 90K are elevated. Methods: We obtained the concentrated 90K from 293T cells stably expressing 90K. DCs were cultured from peripheral blood monocytes, and a DC vaccine pulsed with tumor lysate was compared with a DC vaccine pulsed with 90K. We measured the functional activity for CTLs by using IFN-${\gamma}$-enzyme linked immunoabsorbent spot (ELISPOT) assay. Results: DCs pulsed with tumor lysate+90K exhibited the enhanced T cell stimulation, polarization of $\ddot{i}$ T cell toward Th1. The CTLs generated by DCs pulsed with 90K efficiently lysed HCT116 cells. The results indicate that 90K-speicifc-CTLs can recognize 90K proteins naturally presented by colon cancer cells. Conclusion: Our study suggests that 90K-specific CTLs generated by 90K-pulsed DCs could be useful effector cells for immunotherapy in colon cancer.
Keywords
Dendritic cell; 90K; Colon cancer; Immunotherapy; CTLs;
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