Background:Immunologic tolerance to tissue-restricted self-antigens primarily takes place in the thymus. Results: Sequence variation within the Ica1 promoter is associated with increased autoimmune regulator (AIRE) binding and transcription repression of ICA69 in medullary thymic epithelial cells. Conclusion: AIRE is a transcription repressor within the NOD mouse Ica1 promoter. Significance: A newly identified role for AIRE as a transcription repressor in medullary thymic epithelial cells.
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