Tumor targeting through a TME specific regulatory code and programmable CAR T ce...
Tumor targeting through a TME specific regulatory code and programmable CAR T cells
Two major issues hamper successful treatment of solid cancers with CAR T cells. First, immunosuppression imposed by the tumor microenvironment (TME) can compromise CAR T cell function. Second, CAR T cells require specific antigens...
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Información proyecto TRAP-CART
Duración del proyecto: 24 meses
Fecha Inicio: 2021-03-31
Fecha Fin: 2023-03-31
Fecha límite de participación
Sin fecha límite de participación.
Descripción del proyecto
Two major issues hamper successful treatment of solid cancers with CAR T cells. First, immunosuppression imposed by the tumor microenvironment (TME) can compromise CAR T cell function. Second, CAR T cells require specific antigens for precise tumor recognition to limit/avoid toxicities associated with on-target/off-tumor activity. Initial attempts to overcome these challenges included immune checkpoint blockade and tunable CAR T cells. Here, we propose to develop a conceptually new framework for solid tumor therapy that introduces genetically modified, blood-derived TME cells as Trojan horses to deliver inflammation and broadcast intratumor signals that activate programmable CAR T cells. Overall, we will design a hematopoietic stem cell (HSC)-directed strategy for Tumor microenvironment-Regulated Activation of Programmable CAR T (TRAP-CART). This project builds on the host lab’s expertise in high-throughput genomics, bioinformatics, and CAR T cells, and on my own background in HSC engineering.
Through epigenome/transcriptome profiling, we will systematically identify gene-regulatory elements that are specific to blood-derived cells in the TME. We will use such regulatory sequences for HSC-directed gene therapy, such that their progeny will express a programmed transgene only in the immediate vicinity of tumor cells. This TME-regulated transgene will induce inflammation (to help overcome the hostile immune environment of many solid tumors) and/or release localized activatory signals for CAR T-cells (making it possible to use weakly specific CARs while avoiding on-target/off-tumor activity elsewhere in the body). We will focus on melanoma as our model cancer, which has a high mutational burden, good mouse models and is widely used for testing cutting-edge immunotherapies.
Specific Objectives:
1)Develop a promoter/enhancer toolbox for HSC gene therapy targeting the TME
2)Induce a CAR T-supportive TME that activates programmable CAR T-cells in situ