Role of Endogenous Basic Fibroblast Growth Factor in the Healing of Gastric Ulcers in Rats.

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  • Satoh Hiroshi
    Pharmaceutical Research Division, Takeda Chemical Industries, Ltd.
  • Shino Akio
    Pharmaceutical Development Division, Takeda Chemical Industries, Ltd.
  • Sato Fumihiko
    Pharmaceutical Research Division, Takeda Chemical Industries, Ltd.
  • Asano Shoichi
    Pharmaceutical Research Division, Takeda Chemical Industries, Ltd.
  • Murakami Izumi
    Pharmaceutical Research Division, Takeda Chemical Industries, Ltd.
  • Inatomi Nobuhiro
    Pharmaceutical Research Division, Takeda Chemical Industries, Ltd.
  • Nagaya Hideaki
    Pharmaceutical Research Division, Takeda Chemical Industries, Ltd.
  • Kato Koichi
    Discovery Research Division, Takeda Chemical Industries, Ltd.
  • Szabo Sandor
    Department of Pathology, Harvard Medical School
  • Folkman Judah
    Department of Surgery, Harvard Medical School

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  • Role of Endogenous Basic Fibroblast Gro

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Abstract

Recently, it has been pointed out that growth factors play an important role in the healing of gastrointestinal ulcers. In the present study, we examined the role of endogenous basic fibroblast growth factor (bFGF)in the healing of gastric ulcers in the rat. In male SD rats, gastric ulcers were induced in the antrum by injection of acetic acid. Time-dependent changes in the area and bFGF content in the ulcerated area and distribution of bFGF in the ulcerated mucosa were examined. Effects of bFGF mutein CS23 (TGP-580)and a monoclonal antibody for bFGF (MAb 3H3)on the healing of the gastric ulcers and angiogenesis in the ulcer bed were also examined. The content of bFGF in the ulcerated area increased with time as the ulcer healed and reached a maximum 7 days after ulcer formation. In the gastric ulcer bed, many cells such as fibroblasts and macrophages were positively stained immunohistochemically by anti-bFGF antiserum. MAb 3H3 (0.1 mg/rat/day, i.v.)inhibited angiogenesis in the ulcer bed and significantly delayed ulcer healing, while TGP-580 (0.001 -0.1 mg/kg × 2/day, p.o.)increased the number of microvessels in the ulcer bed and accelerated the healing. These results suggest that endogenous bFGF may play an important role in the healing of gastric ulcers in the rat and that the angiogenic properties of bFGF (TGP-580)may be involved in its effect on ulcer healing.

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