Nature Communications (Jun 2023)

Inherited ARPC5 mutations cause an actinopathy impairing cell motility and disrupting cytokine signaling

  • Cristiane J. Nunes-Santos,
  • HyeSun Kuehn,
  • Brigette Boast,
  • SuJin Hwang,
  • Douglas B. Kuhns,
  • Jennifer Stoddard,
  • Julie E. Niemela,
  • Danielle L. Fink,
  • Stefania Pittaluga,
  • Mones Abu-Asab,
  • John S. Davies,
  • Valarie A. Barr,
  • Tomoki Kawai,
  • Ottavia M. Delmonte,
  • Marita Bosticardo,
  • Mary Garofalo,
  • Magda Carneiro-Sampaio,
  • Raz Somech,
  • Mohammad Gharagozlou,
  • Nima Parvaneh,
  • Lawrence E. Samelson,
  • Thomas A. Fleisher,
  • Anne Puel,
  • Luigi D. Notarangelo,
  • Bertrand Boisson,
  • Jean-Laurent Casanova,
  • Beata Derfalvi,
  • Sergio D. Rosenzweig

DOI
https://doi.org/10.1038/s41467-023-39272-0
Journal volume & issue
Vol. 14, no. 1
pp. 1 – 12

Abstract

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Abstract We describe the first cases of germline biallelic null mutations in ARPC5, part of the Arp2/3 actin nucleator complex, in two unrelated patients presenting with recurrent and severe infections, early-onset autoimmunity, inflammation, and dysmorphisms. This defect compromises multiple cell lineages and functions, and when protein expression is reestablished in-vitro, the Arp2/3 complex conformation and functions are rescued. As part of the pathophysiological evaluation, we also show that interleukin (IL)−6 signaling is distinctively impacted in this syndrome. Disruption of IL-6 classical but not trans-signaling highlights their differential roles in the disease and offers perspectives for therapeutic molecular targets.