title: Regulatory sequences required for hst-1 expression in embryonal carcinoma cells.
abstract: The hst-1 gene, which is implicated in mammalian embryonic development and morphological transformation of NIH3T3 cells, is expressed in undifferentiated F9 cells, but not in differentiated F9 and other well-differentiated cells, such as PYS-2, NIH3T3 and HeLa cells. An octamer element present in the 3' untranslated region acts as an enhancer. Although Oct3 is down-regulated when F9 cells are differentiated, transient expression of Oct3 did not enhance the hst-1 promoter activity in HeLa, NIH3T3 or PYS-2 cells. Thus, the role of Oct3 on hst-1 expression remains elusive, and an additional transcription factor which interacts may regulate hst-1 transcription in association with Oct1, Oct3 or both.
authors.affiliation: Section of Bacterial Infection, Hokkaido University, Sapporo, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Koda
authors.forename: S
authors.initials: S
authors.lastname: Hasan
authors.forename: A
authors.initials: A
authors.lastname: Sasaki
authors.forename: Y
authors.initials: Y
authors.lastname: Arimura
authors.forename: M
authors.initials: M
authors.lastname: Kakinuma
mesh_terms: D016475:3T3 Cells; D000818:Animals; D001483:Base Sequence; D002454:Cell Differentiation; D004252:DNA Mutational Analysis; D004268:DNA-Binding Proteins / Q000235:genetics; D054278:Embryonal Carcinoma Stem Cells; D004742:Enhancer Elements, Genetic; D051519:Fibroblast Growth Factor 4; D005346:Fibroblast Growth Factors / Q000235:genetics*; D015972:Gene Expression Regulation, Neoplastic; D006367:HeLa Cells; D006801:Humans; D051379:Mice; D008969:Molecular Sequence Data; D009154:Mutation; D014411:Neoplastic Stem Cells / Q000378:metabolism*; D050814:Octamer Transcription Factor-3; D011401:Promoter Regions, Genetic; D011518:Proto-Oncogene Proteins / Q000235:genetics*; D012045:Regulatory Sequences, Nucleic Acid; D014157:Transcription Factors / Q000235:genetics; D014158:Transcription, Genetic; D014162:Transfection; D014407:Tumor Cells, Cultured
chemical_list: D004268:DNA-Binding Proteins; C496445:FGF4 protein, human; C496446:Fgf4 protein, mouse; D051519:Fibroblast Growth Factor 4; D050814:Octamer Transcription Factor-3; C494173:POU5F1 protein, human; C494174:Pou5f1 protein, mouse; D011518:Proto-Oncogene Proteins; D014157:Transcription Factors; D005346:Fibroblast Growth Factors