Title : Morphine inhibits VEGF expression in myocardial ischemia.

Pub. Date : 2003 Aug

PMID : 12947338






3 Functional Relationships(s)
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1 We hypothesize that morphine inhibits myocardial VEGF expression by inhibiting hypoxia-induced factor 1alpha (HIF-1alpha) and the signal transduction mechanisms involving Erk-1,2 MAP kinase (p42/p44), and PI3 kinase activity (phospho-Akt). Morphine hypoxia inducible factor 1 subunit alpha Rattus norvegicus
2 Using a rat coronary ligation model, we show that morphine treatment: (1) decreases myocardial VEGF protein expression (immunohistochemistry); (2) decreases HIF-1alpha protein expression (immunoblot); and (3) decreases phospho-Erk-1,2 and phospho-Akt expression. Morphine hypoxia inducible factor 1 subunit alpha Rattus norvegicus
3 CONCLUSIONS: (1) Morphine inhibits hypoxia-induced VEGF transcription, in part, through an HIF-1alpha-mediated mechanism and (2) morphine inhibition of hypoxia-induced HIF-1alpha may be mediated by inhibition of ERK 1,2 MAP kinase activity and PI3 kinase activity. Morphine hypoxia inducible factor 1 subunit alpha Rattus norvegicus