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COMPARATIVE STUDY
JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Suppressive effects of transcription factor GATA-1 on cell type-specific gene expression in dendritic cells.
Immunogenetics 2010 July
To evaluate the effects of the transcription factor GATA-1 on determining cell fate between dendritic cell (DC) and mast cell (MC) lineages, GATA-1 was exogenously expressed in bone marrow-derived (BM) DCs. Exogenous expression of GATA-1 by a retrovirus in BMDCs inhibited expression of CD11c, CD80, CD86, and major histocompatibility complex class II with suppression of antigen-presenting ability and morphological changes toward granulocyte-like cells. Transcription of MC proteases and c-kit was markedly upregulated by GATA-1. Expression of IRF-4 and -8 was markedly suppressed, whereas PU.1 mRNA level was not affected by GATA-1. Chromatin immunoprecipitation assay showed that recruitment of PU.1 on the IRF-8 promoter was reduced in GATA-1-expressing DCs. These results indicate that GATA-1 suppresses PU.1 function but not PU.1 transcription. Thus, GATA-1 appears to determine cell fate by regulating several cell-specific transcription factors.
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