Targeted calcium influx boosts cytotoxic T lymphocyte function in the tumour microenvironment.

ABSTRACT: Adoptive cell transfer utilizing tumour-targeting cytotoxic T lymphocytes (CTLs) is one of the most effective immunotherapies against haematological malignancies, but significant clinical success has not yet been achieved in solid tumours due in part to the strong immunosuppressive tumour microenvironment. Here, we show that suppression of CTL killing by CD4⁺CD25⁺Foxp3⁺ regulatory T cell (Treg) is in part mediated by TGFβ-induced inhibition of inositol trisphosphate (IP₃) production, leading to a decrease in T cell receptor (TCR)-dependent intracellular Ca²⁺ response. Highly selective optical control of Ca²⁺ signalling in adoptively transferred CTLs enhances T cell activation and IFN-γ production in vitro, leading to a signi

SUBMITTER: Kim KD 

PROVIDER: S-EPMC5440668 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature