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CARD15 mutations in Blau syndrome
C Miceli-Richard1, S Lesage, M Rybojad
1Fondation Jean Dausset/CEPH, Paris, France.
Nature Genetics
|August 31, 2001
Insights
Genetic mutations in the CARD15 gene are linked to Blau syndrome, a rare inflammatory condition. This discovery suggests CARD15 plays a role in multiple granulomatous disorders, including Crohn disease.
Area of Science:
- Genetics
- Immunology
- Molecular Biology
Background:
- Blau syndrome is a rare, early-onset autoinflammatory disease characterized by granulomatous inflammation.
- CARD15 (also known as NOD2) is a gene previously associated with Crohn disease susceptibility.
- The specific genetic underpinnings of Blau syndrome remained largely unclear.
Purpose of the Study:
- To investigate the genetic basis of Blau syndrome.
- To identify specific mutations within the CARD15/NOD2 gene in families affected by Blau syndrome.
Main Methods:
- Genetic analysis of CARD15/NOD2 in affected individuals from French and German families.
- Identification and characterization of missense mutations within the nucleotide-binding domain (NBD).
Main Results:
- Three distinct missense mutations were identified in the NBD of CARD15/NOD2.
- These mutations were consistently found in four families diagnosed with Blau syndrome.
Conclusions:
- The findings implicate CARD15/NOD2 mutations in the pathogenesis of Blau syndrome.
- CARD15/NOD2 is involved in susceptibility to at least two granulomatous disorders: Blau syndrome and Crohn disease.
Abstract:
We have identified three missense mutations in the nucleotide-binding domain (NBD) of CARD15/NOD2 in four French and German families with Blau syndrome. Our findings indicate that, in addition to Crohn disease, CARD15 is involved in the susceptibility to a second granulomatous disorder.