title: Expression of Oct-4 during differentiation of murine F9 cells.
abstract: Oct-4 is a transcription factor that shares a common structural motif with members of the POU family. The mRNA for Oct-4 is found in growing oocytes and in totipotent or pluripotent cells of the early mouse embryo. Oct-4 is down-regulated in embryos during differentiation events associated with blastocyst implantation and gastrulation. Oct-4 gene expression is also down-regulated when murine embryonic stem cells or embryonal carcinoma cells are induced to differentiate in the presence of retinoic acid. A polyclonal antibody that can recognize a unique peptide sequence in the C-terminus of mouse Oct-4 has been prepared. It specifically recognizes Oct-4 protein as tested by Western blots and gel mobility shift assays. This antibody has been used to measure Oct-4 protein levels during retinoic acid induced differentiation of F9 embryonal carcinoma cells, It was observed that Oct-4 protein was abundant in undifferentiated F9 cells but decreased to levels below detection as the cells differentiated, consistent with changes in levels of expression in early embryos.
authors.affiliation: Department of Medical Biochemistry, University of Calgary, AB, Canada.
authors.forename: L
authors.initials: L
authors.lastname: Wang
authors.forename: G A
authors.initials: GA
authors.lastname: Schultz
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D003994:Bucladesine / Q000494:pharmacology; D002454:Cell Differentiation / Q000235:genetics*; D002460:Cell Line; D004268:DNA-Binding Proteins / Q000235:genetics* / Q000378:metabolism; D015536:Down-Regulation; D054278:Embryonal Carcinoma Stem Cells; D005786:Gene Expression Regulation; D051379:Mice; D008969:Molecular Sequence Data; D014411:Neoplastic Stem Cells / Q000166:cytology*; D050814:Octamer Transcription Factor-3; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D014157:Transcription Factors / Q000235:genetics* / Q000378:metabolism; D014212:Tretinoin / Q000494:pharmacology
chemical_list: D004268:DNA-Binding Proteins; D050814:Octamer Transcription Factor-3; C494174:Pou5f1 protein, mouse; D012333:RNA, Messenger; D014157:Transcription Factors; D014212:Tretinoin; D003994:Bucladesine