Anti-tumor efficacy of plasmid encoding emm55 in a murine melanoma model.
Cancer Immunol Immunother
; 69(12): 2465-2476, 2020 Dec.
Article
en En
| MEDLINE
| ID: mdl-32556443
ABSTRACT
Emm55 is a bacterial gene derived from Streptococcus pyogenes (S. pyogenes) that was cloned into a plasmid DNA vaccine (pAc/emm55). In this study, we investigated the anti-tumor efficacy of pAc/emm55 in a B16 murine melanoma model. Intralesional (IL) injections of pAc/emm55 significantly delayed tumor growth compared to the pAc/Empty group. There was a significant increase in the CD8+ T cells infiltrating into the tumors after pAc/emm55 treatment compared to the control group. In addition, we observed that IL injection of pAc/emm55 increased antigen-specific T cell infiltration into tumors. Depletion of CD4+ or CD8+ T cells abrogated the anti-tumor effect of pAc/emm55. Combination treatment of IL injection of pAc/emm55 with anti-PD-1 antibody significantly delayed tumor growth compared to either monotherapy. pAc/emm55 treatment combined with PD-1 blockade enhanced anti-tumor immune response and improved systemic anti-tumor immunity. Together, these strategies may lead to improvements in the treatment of patients with melanoma.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Asunto principal:
Proteínas de la Membrana Bacteriana Externa
/
Melanoma Experimental
/
Antineoplásicos Inmunológicos
/
Inmunoterapia
/
Antígenos Bacterianos
Límite:
Animals
/
Female
/
Humans
Idioma:
En
Revista:
Cancer Immunol Immunother
Asunto de la revista:
ALERGIA E IMUNOLOGIA
/
NEOPLASIAS
/
TERAPEUTICA
Año:
2020
Tipo del documento:
Article
País de afiliación:
Estados Unidos