eLife (Nov 2024)

ACK1 and BRK non-receptor tyrosine kinase deficiencies are associated with familial systemic lupus and involved in efferocytosis

  • Stephanie Guillet,
  • Tomi Lazarov,
  • Natasha Jordan,
  • Bertrand Boisson,
  • Maria Tello,
  • Barbara Craddock,
  • Ting Zhou,
  • Chihiro Nishi,
  • Rohan Bareja,
  • Hairu Yang,
  • Frederic Rieux-Laucat,
  • Rosa Irene Fregel Lorenzo,
  • Sabrina D Dyall,
  • David Isenberg,
  • David D'Cruz,
  • Nico Lachmann,
  • Olivier Elemento,
  • Agnes Viale,
  • Nicholas D Socci,
  • Laurent Abel,
  • Shigekazu Nagata,
  • Morgan Huse,
  • W Todd Miller,
  • Jean-Laurent Casanova,
  • Frédéric Geissmann

DOI
https://doi.org/10.7554/eLife.96085
Journal volume & issue
Vol. 13

Abstract

Read online

Systemic lupus erythematosus (SLE) is an autoimmune disease, the pathophysiology and genetic basis of which are incompletely understood. Using a forward genetic screen in multiplex families with SLE, we identified an association between SLE and compound heterozygous deleterious variants in the non-receptor tyrosine kinases (NRTKs) ACK1 and BRK. Experimental blockade of ACK1 or BRK increased circulating autoantibodies in vivo in mice and exacerbated glomerular IgG deposits in an SLE mouse model. Mechanistically, NRTKs regulate activation, migration, and proliferation of immune cells. We found that the patients’ ACK1 and BRK variants impair efferocytosis, the MERTK-mediated anti-inflammatory response to apoptotic cells, in human induced pluripotent stem cell (hiPSC)-derived macrophages, which may contribute to SLE pathogenesis. Overall, our data suggest that ACK1 and BRK deficiencies are associated with human SLE and impair efferocytosis in macrophages.

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