ORAI2 modulates store-operated calcium entry and T cell-mediated immunity

Martin Vaeth; Jun Yang; Megumi Yamashita; Isabelle Zee; Miriam Eckstein; Camille Knosp; Ulrike Kaufmann; Peter Karoly Jani; Rodrigo S. Lacruz; Veit Flockerzi; Imre Kacskovics; Murali Prakriya; Stefan Feske

doi:10.1038/ncomms14714

ORAI2 modulates store-operated calcium entry and T cell-mediated immunity

Martin Vaeth, Jun Yang, Megumi Yamashita, Isabelle Zee, Miriam Eckstein, Camille Knosp, Ulrike Kaufmann, Peter Karoly Jani, Rodrigo S. Lacruz, Veit Flockerzi, Imre Kacskovics, Murali Prakriya, Stefan Feske^*

^*Corresponding author for this work

Pharmacology

Research output: Contribution to journal › Article › peer-review

166 Scopus citations

Abstract

Store-operated Ca²⁺ entry (SOCE) through Ca²⁺ release-activated Ca²⁺ (CRAC) channels is critical for lymphocyte function and immune responses. CRAC channels are hexamers of ORAI proteins that form the channel pore, but the contributions of individual ORAI homologues to CRAC channel function are not well understood. Here we show that deletion of Orai1 reduces, whereas deletion of Orai2 increases, SOCE in mouse T cells. These distinct effects are due to the ability of ORAI2 to form heteromeric channels with ORAI1 and to attenuate CRAC channel function. The combined deletion of Orai1 and Orai2 abolishes SOCE and strongly impairs Tcell function. In vivo, Orai1/Orai2 double-deficient mice have impaired T cell-dependent antiviral immune responses, and are protected from T cell-mediated autoimmunity and alloimmunity in models of colitis and graft-versus-host disease. Our study demonstrates that ORAI1 and ORAI2 form heteromeric CRAC channels, in which ORAI2 fine-tunes the magnitude of SOCE to modulate immune responses.

Original language	English (US)
Article number	14714
Journal	Nature communications
Volume	8
DOIs	https://doi.org/10.1038/ncomms14714
State	Published - Mar 15 2017

Funding

This work was funded by NIH Grants AI097302 (to S.F.) and GM114210 and NS057499 (to M.P.), postdoctoral fellowships VA 882/1-1 (to M.V.) and KA 4083/2-1 (to U.K.) by the Deutsche Forschungsgemeinschaft (DFG) and DFG Grants FL 153/10-1 and SFB894 (to V.F.). The histopathology and cell sorting core facilities at NYU School of Medicine are supported in part by NIH Grant UL1TR00038 from the National Center for Advancing Translational Sciences (NCATS) and by a grant (P30CA016087) to the Laura and Isaac Perlmutter Cancer Center. Analysis of murine Orai1, Orai2 and Orai3 mRNA expression was accomplished in part using data from the ImmGen Consortium. Orai1fl/fl mice and 2C1.1 antibody were kindly provided by Dr H. McBride (Amgen Inc.). Embryonic stem cells used to generate Orai2LacZ+ mice were generated by the trans-NIH Knock-Out Mouse Project (KOMP) and obtained from the KOMP Repository (http://www.komp.org), which were funded by NIH Grants U01HG004085 (to Velocigene at Regeneron Inc.) and U42RR024244 (to the KOMP Repository at UC Davis and CHORI).

ASJC Scopus subject areas

General Physics and Astronomy
General Chemistry
General Biochemistry, Genetics and Molecular Biology

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title = "ORAI2 modulates store-operated calcium entry and T cell-mediated immunity",

abstract = "Store-operated Ca2+ entry (SOCE) through Ca2+ release-activated Ca2+ (CRAC) channels is critical for lymphocyte function and immune responses. CRAC channels are hexamers of ORAI proteins that form the channel pore, but the contributions of individual ORAI homologues to CRAC channel function are not well understood. Here we show that deletion of Orai1 reduces, whereas deletion of Orai2 increases, SOCE in mouse T cells. These distinct effects are due to the ability of ORAI2 to form heteromeric channels with ORAI1 and to attenuate CRAC channel function. The combined deletion of Orai1 and Orai2 abolishes SOCE and strongly impairs Tcell function. In vivo, Orai1/Orai2 double-deficient mice have impaired T cell-dependent antiviral immune responses, and are protected from T cell-mediated autoimmunity and alloimmunity in models of colitis and graft-versus-host disease. Our study demonstrates that ORAI1 and ORAI2 form heteromeric CRAC channels, in which ORAI2 fine-tunes the magnitude of SOCE to modulate immune responses.",

author = "Martin Vaeth and Jun Yang and Megumi Yamashita and Isabelle Zee and Miriam Eckstein and Camille Knosp and Ulrike Kaufmann and Jani, {Peter Karoly} and Lacruz, {Rodrigo S.} and Veit Flockerzi and Imre Kacskovics and Murali Prakriya and Stefan Feske",

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AU - Yang, Jun

AU - Yamashita, Megumi

AU - Zee, Isabelle

AU - Eckstein, Miriam

AU - Knosp, Camille

AU - Kaufmann, Ulrike

AU - Jani, Peter Karoly

AU - Lacruz, Rodrigo S.

AU - Flockerzi, Veit

AU - Kacskovics, Imre

AU - Prakriya, Murali

AU - Feske, Stefan

PY - 2017/3/15

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N2 - Store-operated Ca2+ entry (SOCE) through Ca2+ release-activated Ca2+ (CRAC) channels is critical for lymphocyte function and immune responses. CRAC channels are hexamers of ORAI proteins that form the channel pore, but the contributions of individual ORAI homologues to CRAC channel function are not well understood. Here we show that deletion of Orai1 reduces, whereas deletion of Orai2 increases, SOCE in mouse T cells. These distinct effects are due to the ability of ORAI2 to form heteromeric channels with ORAI1 and to attenuate CRAC channel function. The combined deletion of Orai1 and Orai2 abolishes SOCE and strongly impairs Tcell function. In vivo, Orai1/Orai2 double-deficient mice have impaired T cell-dependent antiviral immune responses, and are protected from T cell-mediated autoimmunity and alloimmunity in models of colitis and graft-versus-host disease. Our study demonstrates that ORAI1 and ORAI2 form heteromeric CRAC channels, in which ORAI2 fine-tunes the magnitude of SOCE to modulate immune responses.

AB - Store-operated Ca2+ entry (SOCE) through Ca2+ release-activated Ca2+ (CRAC) channels is critical for lymphocyte function and immune responses. CRAC channels are hexamers of ORAI proteins that form the channel pore, but the contributions of individual ORAI homologues to CRAC channel function are not well understood. Here we show that deletion of Orai1 reduces, whereas deletion of Orai2 increases, SOCE in mouse T cells. These distinct effects are due to the ability of ORAI2 to form heteromeric channels with ORAI1 and to attenuate CRAC channel function. The combined deletion of Orai1 and Orai2 abolishes SOCE and strongly impairs Tcell function. In vivo, Orai1/Orai2 double-deficient mice have impaired T cell-dependent antiviral immune responses, and are protected from T cell-mediated autoimmunity and alloimmunity in models of colitis and graft-versus-host disease. Our study demonstrates that ORAI1 and ORAI2 form heteromeric CRAC channels, in which ORAI2 fine-tunes the magnitude of SOCE to modulate immune responses.

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ORAI2 modulates store-operated calcium entry and T cell-mediated immunity

Abstract

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