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Effect of cortisol on Aquaporin expression in the esophagus of the European eel (Anguilla anguilla).

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Author(s)

A-S Martinez, Christopher Paul Cutler, GD Wilson, C Philips, Neil Hazon, Gordon Cramb

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Abstract

Long-term cortisol infusion into freshwater (FW)-adapted eels induced a significant increase in aquaporin-1 (AQP1) mRNA expression within the esophageal epithelium of migratory "silver" eels, but not in nonmigratory, immature "yellow" eels. Cortisol treatment had no significant effect on the mRNA abundance of a second aquaporin-1 isoform, termed AQP1dup, which exhibited a highly variable expression profile among individual members of all fish groups. These results suggest that cortisol, at plasma concentrations similar to that found during FW/seawater (SW) acclimation, induces upregulation in AQP1 expression and thus increases esophageal water permeability during the migration of eels to the SW environment.

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Original languageEnglish
Pages (from-to)395-398
JournalAnnals of the New York Academy of Sciences
Volume1040
DOIs
Publication statusPublished - 2005

    Research areas

  • European eel, aquaporin, cortisol, esophagus, seawater (SW) acclimation, SEAWATER

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