The Adhesion G Protein-Coupled Receptor GPR56/ADGRG1 Is an Inhibitory Receptor on Human NK Cells

Gin Wen Chang, Cheng Chih Hsiao, Yen Ming Peng, Felipe A. Vieira Braga, Natasja A.M. Kragten, Ester B.M. Remmerswaal, Martijn D.B. van de Garde, Rachel Straussberg, Gabriele M. König, Evi Kostenis, Vera Knäuper, Linde Meyaard, René A.W. van Lier, Klaas P.J.M. van Gisbergen, Hsi Hsien Lin, Jörg Hamann

Research output: Contribution to journalArticlepeer-review

Abstract

Natural killer (NK) cells possess potent cytotoxic mechanisms that need to be tightly controlled. Here, we explored the regulation and function of GPR56/ADGRG1, an adhesion G protein-coupled receptor implicated in developmental processes and expressed distinctively in mature NK cells. Expression of GPR56 was triggered by Hobit (a homolog of Blimp-1 in T cells) and declined upon cell activation. Through studying NK cells from polymicrogyria patients with disease-causing mutations in ADGRG1, encoding GPR56, and NK-92 cells ectopically expressing the receptor, we found that GPR56 negatively regulates immediate effector functions, including production of inflammatory cytokines and cytolytic proteins, degranulation, and target cell killing. GPR56 pursues this activity by associating with the tetraspanin CD81. We conclude that GPR56 inhibits natural cytotoxicity of human NK cells.

Original languageEnglish
Pages (from-to)1757-1770
Number of pages14
JournalCell Reports
Volume15
Issue number8
DOIs
StatePublished - 24 May 2016

Keywords

  • Adhesion GPCRs
  • Cytotoxicity
  • Immune regulation
  • NK cells
  • Transcription factor

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