Compound heterozygous variants in OTULIN are associated with fulminant atypical late-onset ORAS.
EMBO Mol Med
; 14(3): e14901, 2022 03 07.
Article
em En
| MEDLINE
| ID: mdl-35170849
ABSTRACT
Autoinflammatory diseases are a heterogenous group of disorders defined by fever and systemic inflammation suggesting involvement of genes regulating innate immune responses. Patients with homozygous loss-of-function variants in the OTU-deubiquitinase OTULIN suffer from neonatal-onset OTULIN-related autoinflammatory syndrome (ORAS) characterized by fever, panniculitis, diarrhea, and arthritis. Here, we describe an atypical form of ORAS with distinct clinical manifestation of the disease caused by two new compound heterozygous variants (c.258G>A (p.M86I)/c.500G>C (p.W167S)) in the OTULIN gene in a 7-year-old affected by a life-threatening autoinflammatory episode with sterile abscess formation. On the molecular level, we find binding of OTULIN to linear ubiquitin to be compromised by both variants; however, protein stability and catalytic activity is most affected by OTULIN variant p.W167S. These molecular changes together lead to increased levels of linear ubiquitin linkages in patient-derived cells triggering the disease. Our data indicate that the spectrum of ORAS patients is more diverse than previously thought and, thus, supposedly asymptomatic individuals might also be affected. Based on our results, we propose to subdivide the ORAS into classical and atypical entities.
Palavras-chave
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Endopeptidases
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Ubiquitina
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Doenças Hereditárias Autoinflamatórias
Tipo de estudo:
Risk_factors_studies
Limite:
Child
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Humans
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Newborn
Idioma:
En
Revista:
EMBO Mol Med
Assunto da revista:
BIOLOGIA MOLECULAR
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
Alemanha