PU.1 can regulate the ZNF300 promoter in APL-derived promyelocytes HL-60

Abstract ZNF300, which plays the role in human embryonic development and some diseases, is a typical KRAB/C2H2 zinc finger gene expressed only in higher mammalians. Our data showed that expression of ZNF300 changed significantly in various leukemia blasts in the bone marrow aspirates of newly diagno...

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Bibliographic Details
Published in:Leukemia research 2010-12, Vol.34 (12), p.1636-1646
Main Authors: Xu, Jun-Hua, Wang, Tao, Wang, Xian-Guo, Wu, Xiang-Peng, Zhao, Zhou-Zhou, Zhu, Chen-Gang, Qiu, Hong-Ling, Xue, Lu, Shao, Huan-Jie, Guo, Ming-Xiong, Li, Wen-Xin
Format: Article
Language:English
Subjects:
CD11b Antigen - biosynthesis
CD11b Antigen - genetics
Cell Differentiation - drug effects
Cryoprotective Agents - pharmacology
Dimethyl Sulfoxide - pharmacology
Gene Expression Regulation, Leukemic
Hematology, Oncology and Palliative Medicine
Hematopoietic differentiation
HL-60
HL-60 Cells
Humans
Jurkat Cells
Leukemia
Leukemia, Promyelocytic, Acute - genetics
Leukemia, Promyelocytic, Acute - metabolism
Proto-Oncogene Proteins - genetics
Proto-Oncogene Proteins - metabolism
PU.1
Repressor Proteins - biosynthesis
Repressor Proteins - genetics
Response Elements
Trans-Activators - genetics
Trans-Activators - metabolism
Transcriptional regulation
Up-Regulation
ZNF300
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Summary:Abstract ZNF300, which plays the role in human embryonic development and some diseases, is a typical KRAB/C2H2 zinc finger gene expressed only in higher mammalians. Our data showed that expression of ZNF300 changed significantly in various leukemia blasts in the bone marrow aspirates of newly diagnosed leukemia patients. To investigate the potential relationship between expression of ZNF300 and the progression of leukemia development and hematopoietic differentiation, we cloned and characterized the putative human ZNF300 gene promoter and identified its transcription start sites (TSSs). Deletion and mutagenesis analysis demonstrated that a myeloid-specific transcription factor PU.1 binding site was responsible for myeloid-specific regulation of ZNF300 promoter activity. Furthermore, electrophoretic mobility shift and chromatin immunoprecipitation assays revealed that PU.1 bound to the PU.1 binding site within ZNF300 promoter region in vitro and in vivo . Overexpression of PU.1 elevated ZNF300 promoter activity, whereas silencing of PU.1 expression significantly reduced the activity in myeloid-derived HL-60 cell but not in T-cell Jurkat. In vitro induced HL-60 cells into CD11b expressing cells by DMSO demonstrated that ZNF300 was upregulated along with upregulation of PU.1 expression. These results demonstrated that ZNF300 was activated by PU.1 and suggested that the regulation may be involved in the progression of leukemia development and hematopoietic differentiation.
ISSN:0145-2126
1873-5835
DOI:10.1016/j.leukres.2010.04.009