TOX2 coordinates with TET2 to positively regulate central memory differentiation in human CAR T cells

Collins, Sierra M, Alexander, Katherine A, Lundh, Stefan, Dimitri, Alexander J, Zhang, Zhen, Good, Charly R, Fraietta, Joseph A, Berger, Shelley L (July 2023) TOX2 coordinates with TET2 to positively regulate central memory differentiation in human CAR T cells. Science Advances, 9 (29). ISSN 2375-2548

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Abstract

Chimeric antigen receptor (CAR) T cell therapy is used in treating human hematological malignancies, but its efficacy is limited by T cell exhaustion (TEX). TEX arises at the expense of central memory T cells (TCM), which exhibit robust antitumor efficacy. Reduction of the TET2 gene led to increased TCM differentiation in a patient with leukemia who experienced a complete remission. We show that loss of TET2 led to increased chromatin accessibility at exhaustion regulators TOX and TOX2, plus increased expression of TOX2. Knockdown of TOX increased the percentage of TCM. However, unexpectedly, knockdown of TOX2 decreased TCM percentage and reduced proliferation. Consistently, a TCM gene signature was reduced in the TOX2 knockdown, and TOX2 bound to promoters of numerous TCM genes. Our results thus suggest a role for human TOX2, in contrast to exhaustion regulator TOX, as a potentiator of central memory differentiation of CAR T cells, with plausible utility in CAR T cell cancer therapy via modulated TOX2 expression.

Item Type:	Paper
Subjects:	diseases & disorders > cancer diseases & disorders diseases & disorders > neoplasms organs, tissues, organelles, cell types and functions > cell types and functions > cell functions > cell differentiation organs, tissues, organelles, cell types and functions > cell types and functions > cell functions organs, tissues, organelles, cell types and functions > cell types and functions diseases & disorders > cancer > drugs and therapies diseases & disorders > cancer > drugs and therapies > Immunotherapy organs, tissues, organelles, cell types and functions
CSHL Authors:	Alexander, Katherine
Communities:	CSHL labs > Alexander lab
SWORD Depositor:	CSHL Elements
Depositing User:	CSHL Elements
Date:	21 July 2023
Date Deposited:	16 Jul 2024 14:42
Last Modified:	16 Jul 2024 14:42
PMCID:	PMC10355826
Related URLs:	Publisher
URI:	https://repository.cshl.edu/id/eprint/41610

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