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Informative Article | Biology | Morocco | Volume 5 Issue 12, December 2016

Effects of Cold and Intracerebroventricular Injection of Glucagon on Plasma Catecholamines in Muscovy Ducklings

Laila Lamri ^[3] | Zineb Choukairi ^[3] | Tahar Hazzaz ^[2] | Khalid Halim | Taoufiq Fechtali ^[4]

Abstract: The aim of the present study was to understand the effect of cold and i. c. v glucagon administration on plasma catecholamine. Cold exposure (+4C) induces a 42 % increase of arteriel plasma norepinephrine (NE) in thermoneutral (TN) ducklings. Thus, cold has a stimulatory effect on the sympathetic nervous system (SNS).15min after i. c. v glucagon injection plasma epinephrine (E) increase in TN ducklings, (74 %) whereas NE concentration decrease (23 %) only in TN. Plasma NE remained in glucagon treated (GT). Injection of glucagon causes a decrease in heart rate (HR) in TN duckling whereas it has no effect on GT ducklings. In conclusion, large increase in E levels in TN ducklings may be due to a massive release of adrenal catecholamine in response to cold and i. c. v glucagon administration. Treatment with glucagon twice daily rendered ducks possibly insensitive to the effect of i. c. v glucagon injection.

Keywords: Cold, icv Glucagon, Norepinephrine, Thermoneutral, Sympathetic Nervous System

Edition: Volume 5 Issue 12, December 2016,

Pages: 794 - 797