The autoimmune regulator directly controls the expression of genes critical for thymic epithelial function.
The autoimmune regulator (Aire) gene plays an essential role in negative selection of T cells and deletion of autoreactive T cells in the thymus. The defect in thymic selection in Aire(-/-) mice was attributed to the repressed expression of tissue-specific Ags in the thymic epithelial cells and defective Ag presentation; however, the molecular mechanism underlying these functions has been elusive. Using the chromatin immunoprecipitation technique, we demonstrate here that Aire binds in vivo to specific DNA sequence motifs and directly regulates thymic expression of genes important for thymic functions including expression of autoantigens, cytokines, transcription factors, and posttranslational modifiers. These results unambiguously established Aire as a key transcriptional regulator of the immune system.
Ruan
Qing-Guo
QG
Center for Biotechnology and Genomic Medicine, Medical College of Georgia, Augusta, GA 30912, USA.
Tung
Kenneth
K
Eisenman
Daniel
D
Setiady
Yulius
Y
Eckenrode
Sarah
S
Yi
Bing
B
Purohit
Sharad
S
Zheng
Wei-Peng
WP
Zhang
Yan
Y
Peltonen
Leena
L
She
Jin-Xiong
JX
D000818:Animals; D001323:Autoantibodies / Q000096:biosynthesis; D001324:Autoantigens / Q000096:biosynthesis / Q000235:genetics / Q000276:immunology; D004847:Epithelial Cells / Q000276:immunology* / Q000378:metabolism*; D005786:Gene Expression Regulation / Q000276:immunology*; D016130:Immunophenotyping; D051379:Mice; D008805:Mice, Inbred A; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D009928:Organ Specificity / Q000235:genetics / Q000276:immunology; D016884:Polyendocrinopathies, Autoimmune / Q000235:genetics* / Q000276:immunology*; D013950:Thymus Gland / Q000276:immunology* / Q000378:metabolism* / Q000473:pathology; D014157:Transcription Factors / Q000172:deficiency / Q000235:genetics / Q000502:physiology*; D000096927:AIRE Protein
D001323:Autoantibodies; D001324:Autoantigens; D014157:Transcription Factors; D000096927:AIRE Protein