Células T CAR de doble objetivo y ping-pong: Aprovechamiento de la expansión periférica para mejorar la inmunoterapia...

Área de la Ciencia:

• Immunology; Oncology; Biotechnology

Sus antecedentes:

• Clinical responses to CD19-directed CAR T cell therapy correlate with CAR T cell expansion in peripheral blood.
• CAR T cells targeting solid tumors exhibit limited peripheral expansion due to lack of peripheral antigen recognition.

Objetivo del estudio:

• To engineer dual-targeted and dual-costimulated CAR T cells (CD19/28ζ-M5BBζ) to overcome limitations in solid tumor CAR T cell therapy.
• To enhance peripheral expansion and anti-tumor efficacy of CAR T cells for solid tumors.

Principales métodos:

• Engineered dual-targeted CAR T cells recognizing both CD19+ B cells and solid tumor antigens.
• Tested dual-targeted CAR T cells in immunocompetent mouse models of pancreatic ductal adenocarcinoma and melanoma.
• Validated findings in a human CAR T cell pancreatic/xenograft model with peripheral CD19+ B cells.

Principales resultados:

• Dual-targeted CAR T cells demonstrated enhanced peripheral expansion in mouse models.
• Improved anti-tumor efficacy and increased survival were observed with dual-targeted CAR T cells compared to single-targeted CAR T cells.
• Dual CAR T cells significantly enhanced tumor clearance and survival in the humanized xenograft model.

Conclusiones:

• Dual-targeted CAR T cells boost peripheral expansion and anti-tumor efficacy.
• This strategy enhances CAR T cell pool for tumor infiltration without lymphodepletion.
• Provides a novel approach to improve outcomes for patients receiving CAR T cell therapy for solid tumors.