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The research aims to investigate how HPK1 inhibition affects the differentiation and efficacy of exhausted CD8+ T cells during anti-PD-1 therapy.

Abstract LB149: Progenitor-to-intermediate differentiation of exhausted CD8+T cells is enhanced by HPK1 inhibition during anti-PD-1 therapy

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The research aims to investigate how HPK1 inhibition affects the differentiation and efficacy of exhausted CD8+ T cells during anti-PD-1 therapy.
Utilized single-cell profiling of ex vivo antigen-stimulated T cells
Investigated the effects of HPK1 inhibition on tumor-specific CD8+ T cell clones
Conducted experiments in a mouse tumor model to evaluate TPEX and TIEX cell behaviors
Analyzed migration patterns of TPEX cells in tumor-draining lymph nodes during PD-1 blockade.
HPK1 inhibition significantly expanded tumor-specific CD8+ T cell clones
Highlighted enhanced differentiation from progenitor exhausted TPEX cells to intermediate exhausted TIEX cells
Demonstrated increased TPEX cell expansion in lymph nodes and migration to tumor sites during PD-1 blockade
Revealed an additional immunotherapy mechanism via HPK1 inhibition.

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This research demonstrates HPK1 inhibition improves T-cell differentiation in a cancer model, indicating potential for enhanced immunotherapy.

Lee et al. (2026) studied this question.

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This research demonstrates HPK1 inhibition improves T-cell differentiation in a cancer model, indicating potential for enhanced immunotherapy.