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Species-specific effects on hemolymph glucose control by serotonin, dopamine, and L-enkephalin and their inhibitors in Squilla mantis and Astacus leptodactylus (crustacea) by Simonetta Lorenzon; Sara Brezovec; Enrico A. Ferrero is a Environmental Science article available to read on EtoBox.

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## Abstract Hemolymph glucose level is controlled by crustacean Hyperglycemic Hormone (cHH) released from the eyestalk neuroendocrine centers under conditions of both physiological and environmental stress. Biogenic amines and enkephalin have been found to mediate the release of several neurohormones from crustacean neuroendocrine tissue. We investigated the effect of serotonin, dopamine, and Leucine‐enkephalin in vivo—injected into the stomatopod __Squilla mantis__ and the decapod __Astacus leptodactylus__—whether increasing or depressing glycemia. Serotonin had a marked effect in elevating glucose level compared with initial values in both species. 5–HT~1~–like receptors are more involved in mediating serotonin action as co‐injected cyproheptadine was a more effective antagonist than ketanserin (5–HT~2~–like receptor inhibitor). Dopamine injection in intact animals produced a decrease below initial levels of hemolymph glucose. This effect was significantly antagonized by domperidone. No significant effect of both amines occurred in eyestalkless animals. L‐enkephalin shows a differential effect: in __S. mantis__ it induced hypoglycemia while in __A. leptodactylus__ it caused an in

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Author

Simonetta Lorenzon; Sara Brezovec; Enrico A. Ferrero

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0022-104X)

Published

2004

Language

EN

Field

Environmental Science (Life Sciences)