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Fish Physiology and Biochemistry

, Volume 39, Issue 2, pp 159–169 | Cite as

Effect of guar gum on glucose and lipid metabolism in white sea bream Diplodus sargus

  • P. Enes
  • P. Pousão-Ferreira
  • C. Salmerón
  • E. Capilla
  • I. Navarro
  • J. Gutiérrez
  • A. Oliva-Teles
Article

Abstract

The aim of this study was to assess the role of soluble non-starch polysaccharide (guar gum) on white sea bream Diplodus sargus, glucose and lipid metabolism. A control diet was formulated to contain 40 % crude protein, 14 % crude lipids and 35 % pregelatinized maize starch, and three other diets were formulated similar to the control diet except for guar gum, which was included at 4 % (diet GG4), 8 % (diet GG8) or 12 % (diet GG12). Diets were fed to the fish for 9 weeks on a pair-feeding scheme. Guar gum had no effect on growth performance, feed efficiency, glycaemia, cholesterolaemia and plasma triacylglyceride levels. Hepatic glucokinase and pyruvate kinase activities, liver glycogen content and liver insulin-like growth factor-I gene expression were not affected by dietary guar gum, while fructose-1,6-bisphosphatase activity was lower in fish fed guar gum–supplemented diets. Hepatic glucose-6-phosphate dehydrogenase activity was higher in fish fed diets GG4 and GG8 than in the control group. Overall, data suggest that in contrast to mammals guar gum had no effect on white sea bream glucose utilization and in lowering plasma cholesterol and triacylglyceride levels. However, it seems to contribute to lower endogenous glucose production.

Keywords

Glucose metabolism Guar gum Lipid metabolism Soluble non-starch polysaccharides White sea bream 

Notes

Acknowledgments

The present work was supported by Fundação para a Ciência e a Tecnologia (pluriannual funding) through the PIDDAC Program funds from the Portuguese government and by funds from the Spanish Government (AGL2008-00783 and AGL 2009-12427). The first author was supported by a grant (BPD/39688/2007) from Fundação para a Ciência e a Tecnologia, Portugal. We would like to express our thanks to Mr. P. Correia for the technical assistance during the trial.

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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • P. Enes
    • 1
  • P. Pousão-Ferreira
    • 2
  • C. Salmerón
    • 3
  • E. Capilla
    • 3
  • I. Navarro
    • 3
  • J. Gutiérrez
    • 3
  • A. Oliva-Teles
    • 1
    • 4
  1. 1.CIMAR/CIIMAR, Centro Interdisciplinar de Investigação Marinha e AmbientalUniversidade do PortoPortoPortugal
  2. 2.IPIMAR/CIMSulOlhãoPortugal
  3. 3.Departament de Fisiologia i Immunologia, Facultat de BiologiaUniversitat de BarcelonaBarcelonaSpain
  4. 4.Departamento de Biologia, Faculdade de CiênciasUniversidade do PortoPortoPortugal

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