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Poli, M. Cecilia; Ebstein, Frédéric; Nicholas, Sarah K.; de Guzman, Marietta M.; Forbes, Lisa R.; Chinn, Ivan K.; Mace, Emily M.; Vogel, Tiphanie P.; Carisey, Alexandre F.; Benavides, Felipe; Coban-Akdemir, Zeynep H.; Gibbs, Richard A.; Jhangiani, Shalini N.; Muzny, Donna M.; Carvalho, Claudia M.B.; Schady, Deborah A.; Jain, Mahim; Rosenfeld, Jill A.; Emrick, Lisa; Lewis, Richard A.; Lee, Brendan; Zieba, Barbara A.; Küry, Sébastien; Krüger, Elke; Lupski, James R.; Bostwick, Bret L.; Orange, Jordan S.
American journal of human genetics, 06/2018, Letnik: 102, Številka: 6Journal Article
The proteasome processes proteins to facilitate immune recognition and host defense. When inherently defective, it can lead to aberrant immunity resulting in a dysregulated response that can cause autoimmunity and/or autoinflammation. Biallelic or digenic loss-of-function variants in some of the proteasome subunits have been described as causing a primary immunodeficiency disease that manifests as a severe dysregulatory syndrome: chronic atypical neutrophilic dermatosis with lipodystrophy and elevated temperature (CANDLE). Proteasome maturation protein (POMP) is a chaperone for proteasome assembly and is critical for the incorporation of catalytic subunits into the proteasome. Here, we characterize and describe POMP-related autoinflammation and immune dysregulation disease (PRAID) discovered in two unrelated individuals with a unique constellation of early-onset combined immunodeficiency, inflammatory neutrophilic dermatosis, and autoimmunity. We also begin to delineate a complex genetic mechanism whereby de novo heterozygous frameshift variants in the penultimate exon of POMP escape nonsense-mediated mRNA decay (NMD) and result in a truncated protein that perturbs proteasome assembly by a dominant-negative mechanism. To our knowledge, this mechanism has not been reported in any primary immunodeficiencies, autoinflammatory syndromes, or autoimmune diseases. Here, we define a unique hypo- and hyper-immune phenotype and report an immune dysregulation syndrome caused by frameshift mutations that escape NMD.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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