The mode of action of PTHrP in the regulation of sea bream (Sparus auratus) interrenal cortisol production was studied in vitro using a dynamic superfusion system. Piscine (1–34)PTHrP (10−6–10−11 m) stimulated cortisol production in a dose-dependent manner. The ED50 of (1–34)PTHrP was 2.8 times higher than that of (1–39)ACTH, and maximum increase in cortisol production in response to 10−8 m of (1–34)PTHrP was a...
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