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  • Title: Role of lipoxygenases and lipoxin A(4)/annexin-1 receptor in gastric protection induced by 20% ethanol or sodium salicylate in rats.
    Author: Peskar BM, Ehrlich K, Schuligoi R, Peskar BA.
    Journal: Pharmacology; 2009; 84(5):310-3. PubMed ID: 19844131.
    Abstract:
    The role of cyclooxygenases and prostaglandins in experimental models of gastroprotection is well established. We investigated the effects of the 5-lipoxygenase inhibitor A63162, the 12-lipoxygenase inhibitor baicalein and the 15-lipoxygenase inhibitor PD146176 as well as the nonspecific lipoxin A(4)/annexin-1 antagonist Boc1 on adaptive protection induced by 20% ethanol against 70% ethanol, and on protection induced by sodium salicylate against the mucosal-damage-aggravating effects of celecoxib and dexamethasone during local ischemia-reperfusion in rats. It was found that both types of gastroprotection were antagonized by the lipoxygenase inhibitors and the lipoxin A(4)/annexin-1 antagonist in doses that have no direct damaging effect on gastric mucosa. The results suggest that not only cyclooxygenases, but also active lipoxygenases and, possibly, annexin-1 are required for these types of gastroprotection to occur.
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