Abstract
Here we show the increased hepatocyte growth factor (HGF) and cyclooxygenase-2 (COX-2) expression in gastric mucosa of rats which have developed a reserpine-induced ulcer. Such an increase of HGF and COX-2 expression was blunted in rats pretreated with adrenomedullin. Pretreatment with adrenomedullin and the adrenomedullin22–52 fragment did not result in changes of HGF and COX-2 expression, compared to the reserpine and adrenomedullin treated group. Pretreatment with adrenomedullin and the calcitonin gene-related peptide8–37 fragment (CGRP8–37) increased HGF and COX-2 expression, compared to the reserpine and adrenomedullin treated group. Our results suggest that the inhibitory effect of adrenomedullin on the expression of HGF and COX-2 is mediated by CGRP receptors.
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