Competence Effect of Basic Fibroblast Growth Factor on Cell Cycle in Subcultured Endothelial Cells of Rat Aorta by Flow Cytometry.

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  • Kimura Ikuko
    Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University
  • Okabe Motonori
    Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University
  • Ogasawara Masaru
    Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University
  • Kimura Masayasu
    Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University

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Abstract

With flow cytometry, we investigated the effect of basic fibroblast growth factor (bFGF)-induced competence in subcultured endothelial cells (EC) (4—9-passage) of rat thoracic aorta. The cell population in each phase of the cell cycle was determined by a double staining technique with fluorescein isothiocyanate-conjugated mouse monoclonal antibody against the proliferation-associated nucleus antigen Ki-67 and propidium iodide for total DNA content. EC were cultured in medium containing 5% fetal bovine serum (FBS) for 6 days. After serum-starvation for 2 days, the treatment with bFGF (3—10 ng/ml) for 12 hr promoted the entry of cells into the G1 phase from the G0 phase concentration-dependently. bFGF (10 ng/ml) increased the cell population in the G1 phase by 50% of the total EC, compared with the control culture without bFGF. A further 12—15-hr culture with 1% FBS after bFGF treatment promoted the entry of the cell into the S phase. Thus flow cytometric analysis demonstrates that bFGF stimulates the entry of EC into the G1 phase from the G0 phase.

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