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Literature DB >> 15855276

The transcription factor Gli3 regulates differentiation of fetal CD4- CD8- double-negative thymocytes.

Ariadne L Hager-Theodorides¹, Johannes T Dessens, Susan V Outram, Tessa Crompton.

Abstract

Glioblastoma 3 (Gli3) is a transcription factor involved in patterning and oncogenesis. Here, we demonstrate a role for Gli3 in thymocyte development. Gli3 is differentially expressed in fetal CD4- CD8- double-negative (DN) thymocytes and is most highly expressed at the CD44+ CD25- DN (DN1) and CD44- CD25- (DN4) stages of development but was not detected in adult thymocytes. Analysis of null mutants showed that Gli3 is involved at the transitions from DN1 to CD44+ CD25+ DN (DN2) cell and from DN to CD4+ CD8+ double-positive (DP) cell. Gli3 is required for differentiation from DN to DP thymocyte, after pre-T-cell receptor (TCR) signaling but is not necessary for pre-TCR-induced proliferation or survival. The effect of Gli3 was dose dependent, suggesting its direct involvement in the transcriptional regulation of genes controlling T-cell differentiation during fetal development.

Entities: Chemical Disease Gene Species

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Year: 2005 PMID： 15855276 PMCID： PMC1274277 DOI： 10.1182/blood-2005-03-0998

Source DB: PubMed Journal: Blood ISSN： 0006-4971 Impact factor: 22.113

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