A study on anti-tumor immunity induced by gene-modified melanoma B16 cells.

Abstract:

:T cell-mediated cell immunity is the main anti-tumor immunity in which the effector T cells need specific antigen and costimulatory signals. One of the vaccines applied in tumor immunotherapy is the gene-modified tumor cell vaccine. One potential method to increase cell epitope density is to link the antigen with the major histcompatibility complex subunit beta2m. Our previous research indicated that the strategy of epitope fusion gene OVA-linker-beta2m can promote the formation of specific compounds on the tumor cell surface in vitro. In this study, we constructed two coexpression vectors pGL3-CD80-OVA-linker-beta2m and pGL3-IL21-OVA-linker-beta2m, in order to explore the cooperative action of CD80 or interleukin-21 (IL21) with the epitope fusion gene in anti-tumor immunity. Results showed that gene-modified B16 cells (B16/OVA, B16/CD80-OVA and B16/IL21-OVA) grew slower than B16 cells in vitro and in vivo, especially the B16/IL21-OVA subline, which illustrated that such gene modification decreased oncogenicity of malignant tumor cells. On the other hand, gene-modified tumor cell subline immunization can induce effective long-term anti-tumor immunity defending tumor cell attacks. IL21 played a more cooperative role with the OVA-linker-beta2m than CD80 in this study. This strategy might lay foundations for the research of a new type of tumor vaccine.

journal_name

Oncol Rep

journal_title

Oncology reports

authors

Fang L,Wang K,Liu X,Zhang L,Zhang X,Qian L,Lu J,Qian G,Ge S

subject

Has Abstract

pub_date

2008-06-01 00:00:00

pages

1589-95

issue

6

eissn

1021-335X

issn

1791-2431

journal_volume

19

pub_type

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