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Inherited Arpc5 Mutations Cause an Actinopathy Impairing Cell Motility and Disrupting Cytokine Signaling Publisher Pubmed



Nunessantos CJ1 ; Kuehn HS1 ; Boast B1 ; Hwang SJ1 ; Kuhns DB2 ; Stoddard J1 ; Niemela JE1 ; Fink DL2 ; Pittaluga S3 ; Abuasab M4 ; Davies JS5 ; Barr VA6 ; Kawai T7 ; Delmonte OM7 Show All Authors
Authors
  1. Nunessantos CJ1
  2. Kuehn HS1
  3. Boast B1
  4. Hwang SJ1
  5. Kuhns DB2
  6. Stoddard J1
  7. Niemela JE1
  8. Fink DL2
  9. Pittaluga S3
  10. Abuasab M4
  11. Davies JS5
  12. Barr VA6
  13. Kawai T7
  14. Delmonte OM7
  15. Bosticardo M7
  16. Garofalo M8
  17. Carneirosampaio M9
  18. Somech R10, 11, 12
  19. Gharagozlou M13
  20. Parvaneh N13
  21. Samelson LE6
  22. Fleisher TA1
  23. Puel A14, 15, 16
  24. Notarangelo LD7
  25. Boisson B14, 15, 16
  26. Casanova JL14, 15, 16, 17, 18
  27. Derfalvi B19
  28. Rosenzweig SD1

Source: Nature Communications Published:2023


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. © 2023, This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply.
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