Modulation of the gut microbiota engages antigen cross-presentation to enhance antitumor effects of CAR T cell immunotherapy.
Mol Ther
; 31(3): 686-700, 2023 03 01.
Article
in En
| MEDLINE
| ID: mdl-36641624
ABSTRACT
Several studies have shown the influence of commensal microbes on T cell function, specifically in the setting of checkpoint immunotherapy for cancer. In this study, we investigated how vancomycin-induced gut microbiota dysbiosis affects chimeric antigen receptor (CAR) T immunotherapy using multiple preclinical models as well as clinical correlates. In two murine tumor models, hematopoietic CD19+-A20 lymphoma and CD19+-B16 melanoma, mice receiving vancomycin in combination with CD19-directed CAR T cell (CART-19) therapy displayed increased tumor control and tumor-associated antigens (TAAs) cross-presentation compared with CART-19 alone. Fecal microbiota transplant from human healthy donors to pre-conditioned mice recapitulated the results obtained in naive gut microbiota mice. Last, B cell acute lymphoblastic leukemia patients treated with CART-19 and exposed to oral vancomycin showed higher CART-19 peak expansion compared with unexposed patients. These results substantiate the role of the gut microbiota on CAR T cell therapy and suggest that modulation of the gut microbiota using vancomycin may improve outcomes after CAR T cell therapy across tumor types.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Gastrointestinal Microbiome
/
Receptors, Chimeric Antigen
Limits:
Animals
/
Humans
Language:
En
Journal:
Mol Ther
Journal subject:
BIOLOGIA MOLECULAR
/
TERAPEUTICA
Year:
2023
Document type:
Article
Affiliation country: