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From gastroprotective to ulcerogenic effects of glucocorticoids: role of long-term glucocorticoid action.

Glucocorticoids may have dual action on the gastric mucosa: gastroprotective and ulcerogenic. In this article, we review the data which suggested that an initial action of endogenous glucocorticoids, including stress-produced ones as well as exogenous glucocorticoids is gastroprotective and consider possible mechanisms of the conversion of physiological gastroprotective action of glucocorticoid hormones to their pathological ulcerogenic effect.