Vascular tone control is essential in blood pressure regulation, shock, ischemia-reperfusion, inflammation, vessel injury/repair, wound healing, temperature regulation, digestion, exercise physiology, and metabolism. Here we show that a well-known growth factor, FCF2, long thought to be involved in many developmental and homeostatic processes, including growth of the tissue layers of vessel walls, functions in vascular tone control. Fgf2 knockout mice are morphologically normal and display decreased vascular smooth muscle contractility, low blood pressure and thrombocytosis. Following intra-arterial mechanical injury, FGF2-deficient vessels undergo a normal hyperplastic response. These results force us to reconsider the function of FGF2 in vascular development and homeostasis in terms of vascular tone control.

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  1. Thomas Doetschman: Correspondence should be addressed to T.D.


  1. Departments of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, 231 Bethesda Avenue, Cincinnati, Ohio, 45267, USA

    • Ming Zhou
    • , James B. Hoying
    • , Moying Yin
    • , John J. Duffy
    • , Sharon A. Pawlowski
    •  & Thomas Doetschman
  2. Molecular and Cellular Physiology, University of Cincinnati College of Medicine, 231 Bethesda Avenue, Cincinnati, Ohio, 45267, USA

    • Roy L. Sutliff
    • , Richard J. Paul
    •  & John N. Lorenz
  3. Jerome H. Holland Laboratory, American Red Cross, 15601 Crabbs Branch Way, Rockville, Maryland, 20855, USA

    • Christian C. Haudenschild
  4. McLaughlin Research Institute, 1520 23rd StreetSouth, Great Falls, Montana, 59405, USA

    • J. Douglas Coffin
  5. Hematology-Oncology, University of Cincinnati College of Medicine, 231 Bethesda Avenue, Cincinnati, Ohio, 45267, USA

    • Ling Kong
  6. Pharmacology and Cell Biophysics, University of Cincinnati College of Medicine, 231 Bethesda Avenue, Cincinnati, Ohio, 45267, USA

    • Evangelia G. Kranias
    •  & Wusheng Luo
  7. Pathology and Laboratory Medicine, University of Cincinnati College of Medicine, 231 Bethesda Avenue, Cincinnati, Ohio, 45267, USA

    • Gregory P. Boivin


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