[Oncolytic vaccinia virus expressing CD40L (CD40L-VV) inhibits colorectal cancer cell growth and enhances anti-tumor activity of T cells in tumor-bearing mice].
Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi
; 37(7): 602-607, 2021 Jul.
Article
en Zh
| MEDLINE
| ID: mdl-34140071
ABSTRACT
Objective To explore the anti-tumor activity of oncolytic vaccinia virus expressing CD40L (CD40L-VV) against colorectal cancer. Methods The CD40L-VV was obtained by integrating the sequence of CD40L into the skeleton of oncolytic vaccinia virus(VV). The tumor cells were infected with VV and CD40L-VV to verify their oncolytic activity and the expression of CD40L in vitro. After the tumor model of colorectal cancer was treated with VV and CD40L-VV, the tumor growth was monitored, and the phenotype of tumor infiltrating T cells was analyzed by flow cytometry. The anti-tumor activity of recombinant oncolytic VV was also reflected by detecting the production of cytokine and the proliferation activity of tumor infiltrating T cells. Results Microscopic observation and Western blot assay showed that CD40L-VV could effectively infect tumor cells and express CD40L. Cell viability assay showed that VV and CD40L-VV had dose-dependent lytic ability against tumor cells. The results of tumor transplantation in vivo showed that CD40L-VV had stronger ability to inhibiting tumor growth than VV. Flow cytometry showed that tumor infiltrating T cells in the CD40L-VV group had stronger cytokine secretion ability, stronger proliferative activity and more memory cell phenotypes than those in the VV group. Conclusion CD40L-VV can significantly inhibit the growth of colorectal cancer cells and enhance the anti-tumor activity of T cells in vivo.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Neoplasias Colorrectales
/
Virus Oncolíticos
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
Zh
Revista:
Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi
Asunto de la revista:
ALERGIA E IMUNOLOGIA
Año:
2021
Tipo del documento:
Article
País de afiliación:
China