Article (Scientific journals)
HDAC7 regulates apoptosis in developing thymocytes.
Verdin, Eric; Dequiedt, Franck; Kasler, Herb
2004 • In Novartis Foundation Symposium, 259, p. 115 - 169
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Keywords :
DNA-Binding Proteins; Histones; MADS Domain Proteins; MEF2 Transcription Factors; MEF2D protein, human; Myogenic Regulatory Factors; NR4A1 protein, human; Nuclear Receptor Subfamily 4, Group A, Member 1; Receptors, Cytoplasmic and Nuclear; Receptors, Steroid; Transcription Factors; HDAC7 protein, human; Histone Deacetylases; Animals; Apoptosis/physiology; Cell Differentiation/physiology; DNA-Binding Proteins/genetics; DNA-Binding Proteins/metabolism; Histone Deacetylases/physiology; Histones/physiology; Humans; Thymus Gland/physiology; Transcription Factors/genetics; Transcription Factors/metabolism; Medicine (all)
Abstract :
[en] Central immune tolerance is established in the thymus for T cells via a complex selection process that involves interactions between CD4+CD8+ double-positive thymocytes and antigen-presenting cells. Cells that express antigen receptors interacting strongly with self peptide MHC complexes are deleted from the repertoire via activation-induced apoptosis, a process termed negative selection. Cells that express an appropriate signal are positively selected and mature into single positive naïve T cells, either CD4 or CD8 positive. The balance between positive and negative selection is thought to play a critical role in the elimination of self-reactive clones and in the establishment of central immune tolerance. We have recently reported that HDAC7, a class II histone deacetylase, is highly expressed in CD4+CD8+ double positive thymocytes. HDAC7 inhibits Nur77 expression, an orphan receptor involved in antigen-induced cell death and in negative selection. The inhibitory effect of HDAC7 on the Nur77 promoter is mediated via the transcription factor MEF2D. During T cell receptor activation, HDAC7 is exported from the nucleus leading to the derepression of Nur77 expression and the induction of apoptosis. These observations define HDAC7 as a regulator of Nur77 and apoptosis in developing thymocytes and indicate that HDAC7 is likely to play an important role in the control of central immune tolerance.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Verdin, Eric;  Gladstone Institute of Virology and Immunology, Department of Medicine, University of California, San Francisco, PO Box 419100, San Francisco, CA 94141-9100, USA
Dequiedt, Franck  ;  Université de Liège - ULiège > Département des sciences de la vie > Génétique et biologie moléculaires animales ; Université de Liège - ULiège > GIGA > GIGA Molecular & Computational Biology - Gene Expression & Cancer
Kasler, Herb
Language :
English
Title :
HDAC7 regulates apoptosis in developing thymocytes.
Publication date :
June 2004
Journal title :
Novartis Foundation Symposium
ISSN :
1528-2511
Publisher :
John Wiley & Sons, Gb
Volume :
259
Pages :
115 - 169
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 03 July 2026

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