Effect of indomethacin on the secretion of pepsinogen in isolated human cells in vitro
Serrano Aulló, M.T.; Nerín de la Puerta, J.M.; Lanas Arbeloa, A.I.
Revista Espanola de Enfermedades Digestivas Organo Oficial de la Sociedad Espanola de Patologia Digestiva 88(4): 253-257
1996
ISSN/ISBN: 1130-0108 PMID: 9004795 Document Number: 455534
The effects of indomethacin on pepsinogen secretion were studied in isolated human peptic cells prepared from endoscopically obtained biopsies after collagenase digestion, mechanical disruption and percoll gradient centrifugation. Low concentrations of indomethacin (10(-8)-10(-10) M) stimulated basal pepsinogen secretion. Higher doses of indomethacin (10(-5)-10(-6) M) potentiated histamine (10(-4) M) and db-cAMP (10(-4) M)-stimulated pepsinogen secretion without affecting acetylcholine (10(-6) M) and CCK-8-stimulated pepsinogen secretion or cell vitality. Increase of pepsinogen secretion was dependent on extracellular calcium because potentiation was abolished by calcium depletion of the medium. We conclude that indomethacin potentiates basal and secretagogue-stimulated pepsinogen secretion by dispersed human peptic cells and this might be an additional mechanism of NSAID-induced gastric injury. This potentiation effect is regulated by calcium and independent of endogenous prostaglandin inhibition.