1. Inherited ARPC5 mutations cause an actinopathy impairing cell motility and disrupting cytokine signaling.
- Author
-
Nunes-Santos, Cristiane J., Kuehn, HyeSun, Boast, Brigette, Hwang, SuJin, Kuhns, Douglas B., Stoddard, Jennifer, Niemela, Julie E., Fink, Danielle L., Pittaluga, Stefania, Abu-Asab, Mones, Davies, John S., Barr, Valarie A., Kawai, Tomoki, Delmonte, Ottavia M., Bosticardo, Marita, Garofalo, Mary, Carneiro-Sampaio, Magda, Somech, Raz, Gharagozlou, Mohammad, and Parvaneh, Nima
- Subjects
CYTOKINES ,GENETIC mutation ,PROTEIN expression ,CELL physiology ,DISEASE relapse ,INTERLEUKIN-23 - 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. Mutations that impact the function of the Arp2/3 complex are known to cause inborn errors of immunity. Here the authors describe biallelic null mutations in the ARPC5 subunit of Arp2/3 that disrupt actin function and cytokine signaling, causing infections, autoimmunity, inflammation and dysmorphisms. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF