Abstract:
:The CD4 versus CD8 lineage specification of thymocytes is linked to coreceptor expression. The transcription factor MAZR has been identified as an important regulator of Cd8 expression. Here we show that variegated CD8 expression by loss of Cd8 enhancers was reverted in MAZR-deficient mice, which confirms that MAZR negatively regulates the Cd8 loci during the transition to the double-positive (DP) stage. Moreover, loss of MAZR led to partial redirection of major histocompatibility complex (MHC) class I-restricted thymocytes into CD4(+) helper-like T cells, which correlated with derepression of Th-POK, a central transcription factor for helper-lineage development. MAZR bound the silencer of the gene encoding Th-POK, which indicated direct regulation of this locus by MAZR. Thus, MAZR is part of the transcription factor network that regulates the CD8 lineage differentiation of DP thymocytes.
journal_name
Nat Immunoljournal_title
Nature immunologyauthors
Sakaguchi S,Hombauer M,Bilic I,Naoe Y,Schebesta A,Taniuchi I,Ellmeier Wdoi
10.1038/ni.1860subject
Has Abstractpub_date
2010-05-01 00:00:00pages
442-8issue
5eissn
1529-2908issn
1529-2916pii
ni.1860journal_volume
11pub_type
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