Journal of Comparative Physiology B

, Volume 163, Issue 2, pp 118–122 | Cite as

Glucose metabolism by brown trout peripheral blood lymphocytes

  • J. L. Albi
  • J. Planas
  • J. Sánchez
Article

Abstract

Glucose metabolism in peripheral blood lymphocytes from the brown trout Salmo trutta has been studied. Glucose is taken up by means of a sodium-independent saturable process (Km=10.8 mmol·l-1), as well as by simple diffusion. Once within the cell, most of glucose is directed to lactate production through either the Embden-Meyerhof pathway or the hexose-monophosphate shunt. Rates of lactate formation are higher than rates of CO2 formation. Glutamine does not exert an effect on either glucose uptake or glucose metabolism. The present study provides information regarding the nature of energy sources for different cell types in salmonids.

Key words

Phloretin-sensitive uptake Glucose metabolism Aerobic and anaerobic metabolism Peripheral blood lymphocytes Trout, Salmo trutta 

Abbreviations

3-OMG

3-O-methyl glucose

EM

Embden-Meyerhoff pathway

G6D

glucose-6-phosphate dehydrogenase

HK

hexokinase

HMS

hexose monophosphate shunt

ICDH

isocitrate dehydrogenase

Km

apparent Michaelis constant

LDH

lactate dehydrogenase

MCB

modified Cortland buffer

PBL

peripheral blood lymphocytes

PFK

fructose-6-phosphate kinase

PK

pyruvate kinase

RBC

red blood cells

Vmax

maximal rate of uptake

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Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • J. L. Albi
    • 1
  • J. Planas
    • 1
  • J. Sánchez
    • 1
  1. 1.Dpt. Bioquímica i Fisiologia, Unitat de FisiologiaUniversitat de BarcelonaBarcelonaSpain

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