Efficacy of bivalent CEACAM6/4-1BBL genetic vaccine combined with anti-PD1 antibody in MC38 tumor model of mice

Autor: Yuzhen Li, Xiaodan Zhu, Jianliang You, Baonan Zhang, Xiaona Huang, Chunhui Jin
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Heliyon, Vol 8, Iss 10, Pp e10775- (2022)
Druh dokumentu: article
ISSN: 2405-8440
DOI: 10.1016/j.heliyon.2022.e10775
Popis: We used mouse CRC cell line (MC38) to establish a heterotopic mouse model, and applied [89Zr]-labeled PD-L1 antibody KN035 for PET imaging. Attenuated Salmonella typhimurium 3261 was used as an anti-tumor vaccine, and the combined anti-tumor immunotherapy with bivalent genetic vaccine and anti-PD1 antibody Nivolumab was conducted. MicroPET was performed to observe the changes of tumor tissues and expression of PD-L1. We found that the recombinant double-gene plasmids were stably expressed in COS7 cells. Study results showed the combined immunotherapy improved the effectiveness over genetic vaccine alone. This study supports that combination of genetic vaccines and anti-immunocheckpoint immunotherapy can inhibit MC38 tumor growth.
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