Abstract
The present study was conducted to determine whether bradykinin would affect the secretion and expression of endothelin-1 (ET-1) in B16-BL6 melanoma cells. Bradykinin administered to cultured melanoma cells increased preproET-1 mRNA level and the secretion of ET-1. Although kinin B 1 and B 2 receptor mRNAs are expressed in the melanoma cells, the increase of preproET-1 mRNA expression and the secretion of ET-1 were inhibited by kinin B 2, but not by B 1, receptor antagonist. These results suggest that bradykinin regulates the secretion and biosynthesis of ET-1 through kinin B 2 receptor in tumor cells, especially melanoma cells.
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