title: [Influence of AML1 and AML1-ETO on transcriptional regulation of nucb2 gene].
abstract: This study was purposed to investigate the effect of AML1-ETO fusion protein resulted from hematopoietic transcription factor (AML1) and acute myeloid leukemia M(2b)(AML-M(2b)) on transcription activity of nucleobindin 2 (nucb2) promoter, and to explore the role of AML1-ETO in molecular pathogenesis of AML-M(2b). The real-time RT-PCR was used to study the regulation of AML1-ETO on nucb2 at transcription level in AML1-ETO inducible leukemia cell line, the chromatin immunoprecipitation (ChIP)-based qPCR was used to investigate the direct in vivo interaction between the AML1, AML1-ETO and nucb2 promoter in AML1-ETO positive leukemia cell line, the luciferase report gene assay was used to detect the regulation of AML1, AML1-ETO on the transcription activity of nucb2 promoter. The results showed that the expression level of nucb2 was reduced with the increase of AML1-ETO. The promoter of nucb2 could be bound by both AML1 and AML1-ETO. The promoter of nucb2 was trans-repressed by AML1 and AML1-ETO respectively. It is concluded that the nucb2 is the direct target gene of AML1 and AML1-ETO, the transcription regulation of AML1, AML1-ETO on nucb2 is carried out via repressing its promoter activity.
authors.affiliation: National Key Laboratory of Medical Genomics, Ruijin Hospital, Shanghai Jiaotong University Medical College, Shanghai 200025, China.
authors.forename: Bei
authors.initials: B
authors.lastname: Zou
authors.forename: Wen
authors.initials: W
authors.lastname: Jin
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.forename: Jian-Tao
authors.initials: JT
authors.lastname: Shi
authors.forename: Ji
authors.initials: J
authors.lastname: Zhang
authors.forename: Kan-Kan
authors.initials: KK
authors.lastname: Wang
mesh_terms: D002135:Calcium-Binding Proteins / Q000235:genetics*; D045744:Cell Line, Tumor; D050676:Core Binding Factor Alpha 2 Subunit / Q000235:genetics*; D004268:DNA-Binding Proteins / Q000235:genetics*; D015973:Gene Expression Regulation, Leukemic; D006801:Humans; D009419:Nerve Tissue Proteins; D000080866:Nucleobindins; D015514:Oncogene Proteins, Fusion / Q000235:genetics*; D011401:Promoter Regions, Genetic; D000075142:RUNX1 Translocation Partner 1 Protein; D014157:Transcription Factors / Q000235:genetics*; D015533:Transcriptional Activation
chemical_list: C107844:AML1-ETO fusion protein, human; D002135:Calcium-Binding Proteins; D050676:Core Binding Factor Alpha 2 Subunit; D004268:DNA-Binding Proteins; C000630650:NUCB2 protein, human; D009419:Nerve Tissue Proteins; D000080866:Nucleobindins; D015514:Oncogene Proteins, Fusion; D000075142:RUNX1 Translocation Partner 1 Protein; D014157:Transcription Factors