Open AccessSTIM 1 and STIM 2‐mediated Ca 2+ influx regulates antitumour immunity by CD 8 + T cells
Author(s) -
Weidinger Carl,
Shaw Patrick J.,
Feske Stefan
Publication year - 2013
Publication title -
embo molecular medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.923
H-Index - 107
eISSN - 1757-4684
pISSN - 1757-4676
DOI - 10.1002/emmm.201302989
Subject(s) - orai1 , cytotoxic t cell , stim1 , degranulation , immune system , chemistry , microbiology and biotechnology , cd8 , cancer research , biology , immunology , in vitro , biochemistry , endoplasmic reticulum , receptor
Store‐operated calcium entry (SOCE) through Ca 2+ release‐activated Ca 2+ (CRAC) channels regulates the function of many immune cells. Patients with loss‐of‐function mutations in the CRAC channel genes ORAI1 or STIM1 are immunodeficient and are prone to develop virus‐associated tumours. This and the reported role of Ca 2+ signals in cytotoxic lymphocyte function suggest that SOCE may be critical for tumour immune surveillance. Using conditional knock out mice lacking STIM1 and its homologue STIM2, we find that SOCE in CD8 + T cells is required to prevent the engraftment of melanoma and colon carcinoma cells and to control tumour growth. SOCE is essential for the cytotoxic function of CTLs both in vivo and in vitro by regulating the degranulation of CTLs, their expression of Fas ligand and production of TNF‐α and IFN‐γ. Our results emphasize an important role of SOCE in antitumour immunity, which is significant given recent reports arguing in favour of CRAC channel inhibition for cancer therapy.