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Oncotarget. 2016 Nov 29;7(48):79170-79186. doi: 10.18632/oncotarget.13005.

Anti-metastatic effect of the TM4SF5-specific peptide vaccine and humanized monoclonal antibody on colon cancer in a mouse lung metastasis model.

Author information

1
Center for Medical Science Research, College of Medicine, Hallym University, Chuncheon 24252, Republic of Korea.
2
Department of Biochemistry, College of Natural Sciences, Chungbuk National University, Cheongju 28644, Republic of Korea.
3
Department of Molecular Science and Technology, Ajou University, Suwon 16499, Republic of Korea.
4
Department of Microbiology, College of Medicine, Hallym University, Chuncheon 24252, Republic of Korea.

Abstract

Transmembrane 4 superfamily member 5 protein (TM4SF5) is a potential therapeutic target for hepatocellular carcinoma (HCC) and colon cancer. In a previous study, we demonstrated the prophylactic and therapeutic effects of a TM4SF5-specific peptide vaccine and monoclonal antibody in HCC and colon cancer in a mouse model. Here, we designed a cyclic peptide targeting TM4SF5. Cyclic peptide-specific antibodies were produced in mice after immunization with a complex of the peptide, CpG-DNA, and liposomes. Intravenous injection of the CT-26 mouse colon cancer cell line into mice induced tumors in the lung. Immunization with the peptide vaccine improved the survival rate and reduced the growth of lung tumors. We established a monoclonal antibody specific to the cyclic TM4SF5-based peptide and humanized the antibody sequence by complementarity determining region-grafting. The humanized antibody was reactive to the cyclic peptide and TM4SF5 protein. Treatment of CT-26 cells with the humanized antibody reduced cell motility in vitro. Furthermore, direct injection of the humanized anti-TM4SF5 antibody in vivo reduced growth of lung tumors in mouse metastasis model. Therefore, we conclude that the immunization with the cyclic peptide vaccine and injection of the TM4SF5-specifc humanized antibody have an anti-metastatic effect against colon cancer in mice. Importantly, the humanized antibody may serve as a starting platf.

KEYWORDS:

TM4SF5; anti- metastatic effect; colon cancer; monoclonal antibody; peptide vaccine

PMID:
27816969
PMCID:
PMC5346706
DOI:
10.18632/oncotarget.13005
[Indexed for MEDLINE]
Free PMC Article

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