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Gene defect behind APECED: a new clue to autoimmunity
P Björses1, J Aaltonen, N Horelli-Kuitunen
1Department of Human Molecular Genetics, National Public Health Institute, University of Helsinki, Mannerheimintie 166, FIN-00300 Helsinki, Finland.
Human Molecular Genetics
|September 15, 1998
Summary
The autoimmune regulator (AIRE) gene is identified as the cause of Autoimmune Polyendocrinopathy-Candidiasis-Ectodermal Dystrophy (APECED). Understanding AIRE mutations offers insights into the genetic basis of autoimmunity.
Area of Science:
- Immunology
- Genetics
- Molecular Biology
Background:
- Human autoimmunity arises from complex gene-environment interactions, making genetic variant identification challenging.
- Autoimmune Polyendocrinopathy-Candidiasis-Ectodermal Dystrophy (APECED) is a rare, monogenic autoimmune disease offering a model for genetic autoimmunity research.
Purpose of the Study:
- To identify the genetic basis of APECED, a Mendelian autoimmune disorder.
- To analyze the role of the identified gene in the molecular pathogenesis of autoimmunity.
Main Methods:
- Positional cloning strategy to isolate the causative gene for APECED.
- Mutation analysis in AIRE gene in APECED patients.
Main Results:
- A novel gene, AIRE, was identified as the causative gene for APECED.
- AIRE is expressed in thymus, pancreas, and adrenal cortex, and multiple mutations were found in patients.
- The AIRE protein contains PHD-type zinc finger motifs and a nuclear targeting signal, suggesting a role in transcriptional regulation.
Conclusions:
- The AIRE gene is responsible for APECED, providing a key genetic insight into autoimmune diseases.
- Functional studies of AIRE protein will elucidate the molecular pathogenesis of APECED and autoimmunity in general.