Identification of an IL-1 receptor mutation driving autoinflammation directs IL-1-targeted drug design.
Immunity
; 56(7): 1485-1501.e7, 2023 07 11.
Article
in En
| MEDLINE
| ID: mdl-37315560
ABSTRACT
The interleukin 1 (IL-1) pathway signals through IL-1 receptor type 1 (IL-1R1) and emerges as a central mediator for systemic inflammation. Aberrant IL-1 signaling leads to a range of autoinflammatory diseases. Here, we identified a de novo missense variant in IL-1R1 (p.Lys131Glu) in a patient with chronic recurrent multifocal osteomyelitis (CRMO). Patient PBMCs showed strong inflammatory signatures, particularly in monocytes and neutrophils. The p.Lys131Glu substitution affected a critical positively charged amino acid, which disrupted the binding of the antagonist ligand, IL-1Ra, but not IL-1α or IL-1ß. This resulted in unopposed IL-1 signaling. Mice with a homologous mutation exhibited similar hyperinflammation and greater susceptibility to collagen antibody-induced arthritis, accompanied with pathological osteoclastogenesis. Leveraging the biology of the mutation, we designed an IL-1 therapeutic, which traps IL-1ß and IL-1α, but not IL-1Ra. Collectively, this work provides molecular insights and a potential drug for improved potency and specificity in treating IL-1-driven diseases.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Osteomyelitis
/
Receptors, Interleukin-1
Type of study:
Diagnostic_studies
Limits:
Animals
Language:
En
Journal:
Immunity
Journal subject:
ALERGIA E IMUNOLOGIA
Year:
2023
Document type:
Article
Affiliation country:
China