Restitution of frog gastric mucosa in vitro: Effect of basic fibroblast growth factor

Hannu Paimela, Philip J. Goddard, Katharine Carter, Robert Khakee, Paul L. McNeil, Susumo Ito, William Silen

Research output: Contribution to journalArticle

59 Scopus citations

Abstract

Background: Rapid re-epithelialization after superficial gastric mucosal injury is caused by migration of persisting viable epithelial cells. Basic fibroblast growth factor (bFGF) has been reported to enhance the healing of experimental duodenal ulcer, but its mode of action is unclear. The present experiments examine whether an effect of bFGF on restitution might contribute to such healing. Methods: Paired halves of bullfrog fundic gastric mucosa in Ussing chambers were injured by luminal exposure to 1 mol/L NaCl for 10 minutes. Results: Luminal protamine or suramin, both known to interfere with endogenous bFGF, significantly inhibited electrophysiological recovery at neutral luminal pH (pHL). Luminal sucrose octasulfate, which prevents acid degradation of bFGF, and an exogenous, acid-resistant form of bFGF allowed electrophysiological recovery at a pHL of 3.0 that completely prevented restitution in control tissues. Electrophysiological recovery correlated well with morphological restitution. The presence of endogenous bFGF in normal and restituting bullfrog mucosa was confirmed by positive staining with a monoclonal antibody. Conclusions: It is concluded that rapid epithelial repair after surface injury is at least in part mediated by bFGF.

Original languageEnglish (US)
Pages (from-to)1337-1345
Number of pages9
JournalGastroenterology
Volume104
Issue number5
DOIs
StatePublished - May 1993

ASJC Scopus subject areas

  • Hepatology
  • Gastroenterology

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    Paimela, H., Goddard, P. J., Carter, K., Khakee, R., McNeil, P. L., Ito, S., & Silen, W. (1993). Restitution of frog gastric mucosa in vitro: Effect of basic fibroblast growth factor. Gastroenterology, 104(5), 1337-1345. https://doi.org/10.1016/0016-5085(93)90342-A