Nutritional assessment of somatolactin function in gilthead sea bream (Sparus aurata): concurrent changes in somatotropic axis and pancreatic hormones

Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
Silvia Vega-Rubín de CelisJaume Pérez-Sánchez

Abstract

The role of somatolactin (SL) in the regulation of energy homeostasis in gilthead sea bream (Sparus aurata) has been analysed. First, a down-regulation of plasma SL levels in response to gross shifts in dietary amino acid profile and the graded replacement of fish meal by plant protein sources (50%, 75% and 100%) has been observed. Thus, the impaired growth performance with changes in dietary amino acid profile and dietary protein source was accompanied by a decrease in plasma SL levels, which also decreased over the course of the post-prandial period irrespective of dietary nitrogen source. Secondly, we examined the effect of SL and growth hormone (GH) administration on voluntary feed intake. A single intraperitoneal injection of recombinant gilthead sea bream SL (0.1 microg/g fish) evoked a short-term inhibition of feed intake, whereas the same dose of GH exerted a marked enhancement of feed intake that still persisted 1 week later. Further, we addressed the effect of arginine (Arg) injection upon SL and related metabolic hormones (GH, insulin-like growth factor-I (IGF-I), insulin and glucagon) in fish fed diets with different nitrogen sources. A consistent effect of Arg injection (6.6 micromol/g fish) on plasma GH and IGF-I ...Continue Reading

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Citations

Aug 30, 2011·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·Sergio PolakofJosé L Soengas
Jul 18, 2009·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·L Vargas-ChacoffG Martínez-Rodríguez
Mar 3, 2009·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·L Vargas-ChacoffG Martínez-Rodríguez
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Sep 19, 2006·General and Comparative Endocrinology·Felix G AysonAkihiro Takemura
Oct 11, 2012·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Ryusuke SudoKatsumi Tsukamoto
Jun 4, 2013·General and Comparative Endocrinology·Elizabeth R EllensMark A Sheridan
Nov 19, 2014·Fish Physiology and Biochemistry·Cândida ToniBernardo Baldisserotto
Jan 19, 2018·Fish Physiology and Biochemistry·Quanquan CaoShaowu Yin
Nov 27, 2019·The Journal of Experimental Biology·Johnathon L I ForbesJean-Michel Weber
Aug 15, 2018·Frontiers in Endocrinology·Miquel Perelló-AmorósJoaquim Gutiérrez
Sep 18, 2020·Molecular and Cellular Endocrinology·Luis Fabián Canosa, Juan Ignacio Bertucci
Aug 28, 2021·Animals : an Open Access Journal From MDPI·Miquel Perelló-AmorósJoaquim Gutiérrez

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