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Am J Physiol Cell Physiol 277: C29-C34, 1999;
0363-6143/99 $5.00
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Vol. 277, Issue 1, C29-C34, July 1999

Na+-K+ pump and metabolic activities of trout erythrocytes during anoxia

Jesús Pesquero1, Teresa Roig2, Josep Sánchez1, and Jordi Bermúdez2

1 Departament de Fisiologia, Universitat de Barcelona, E-08028 Barcelona; and 2 Departament Ciències Fisiològiques II, Unitat de Biofísica, Universitat de Barcelona, E-08907 L'Hospitalet de Llobregat, Spain

Metabolic activity in the red blood cells of brown trout was monitored under conditions of oxygen depletion and chemically induced anoxia. Although metabolic activity was reduced during anoxia to one-third of the normoxic value, these cells maintained their ATP contents stable and were viable for hours in the absence of oxygen. In addition, Na+-K+ pump activity was not down-regulated when metabolic activity was reduced during anoxia. The compatibility of this finding with energy equilibrium and ion homeostasis was investigated.

microcalorimetry; potassium flux


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T. M. Casey, J. L. Pakay, M. Guppy, and P. G. Arthur
Hypoxia Causes Downregulation of Protein and RNA Synthesis in Noncontracting Mammalian Cardiomyocytes
Circ. Res., April 19, 2002; 90(7): 777 - 783.
[Abstract] [Full Text] [PDF]


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