Protective action of deglycyrrhizinized liquorice on the occurrence of stomach ulcers in pylorus-ligated rats

Deglycyrrhizinised liquorice (DGL) and the renewal of rat stomach epithelium

Deglycyrrhizinised liquorice (DGL) stimulated proliferation in the forestomach of the rat but did not stimulate and possibly even inhibited proliferation in the glandular part. DGL increased the number of fundus glands in which labelled mucus secreting cells occur as well as the total number of labelled mucus cells per gland. The mechanism of action proposed for DGL is that DGL stimulates and/or accelerates the differentiation to glandular cells as well as mucus formation and secretion. The accelerated proliferation observed in the forestomach is ascribed to an improved environment in the stomach as a consequence of the enhanced mucus secretion under the influence of DGL.

Effect of deglycyrrhizinated liquorice on gastric mucosal damage by aspirin

Gastric mucosal damage induced by giving 60 mg aspirin orally to rats was reduced by simultaneous administration of 100-500 mg deglycyrrhizinated liquorice. Human faecal blood loss induced by 975 mg aspirin orally three times a day was less when 350 mg deglycyrrhizinated liquorice was given with each dose of aspirin.

The influence of carbenoxolone on steroid-induced ulcer and mucus secretion in the rat

In rats, gastric mucus was decreased by starvation. The administration of carbenoxolone sodium, prednisolone, or their combination to starved rats brought the level of gastric mucus to that of nonstarved controls. Concomitant treatment with carbenoxolone sodium did not prevent prednisolone-induced ulceration of the glandular stomach in starved rats. The ulcerations of the prostomach (squamous spithelium)induced by starvation were prevented by carbenoxolone sodium, prednisolone, or the combination of the two.