Does luminal gastrin stimulate gastric acid secretion?

@article{Ayalon1981DoesLG,
  title={Does luminal gastrin stimulate gastric acid secretion?},
  author={Alberto Ayalon and Roberto Yazigi and Peter G. Devitt and Phillip Leon Rayford and James Chilton Thompson},
  journal={American journal of surgery},
  year={1981},
  volume={141 1},
  pages={
          94-7
        }
}
The effects of pentagastrin on acid secretion, short circuit current, electrical conductance and potential difference were determined in isolated bullfrog fundic mucosa. Biologically active luminal pentagastrin had no effect on gastric mucosa, even at a concentration 100 times higher than that necessary for stimulation of the mucosa from the serosal side. It is concluded that luminal gastrin does not appear to have a physiologic role in gastric secretory processes. 
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