Dichloroacetate reveals the presence of metabolic inertia at the start of exercise in rainbow trout (Oncorhynchus mykiss, Walbaum 1792).

Abstract:

:A lag in the increase in oxygen consumption (MO2 ) occurs at the start of sustainable exercise in trout. Waterborne dichloroacetate (0.58 and 3.49 mmol l-1 ), a compound which activates pyruvate dehydrogenase (PDH) by inhibiting PDH kinase in muscle, accelerates the increase in MO2 during the first 10 min of sustainable exercise when velocity is elevated to 75% critical swimming speed in a swim tunnel. There are no effects on MO2 thereafter or at rest. This indicates that a delay in PDH activation ("metabolic inertia") contributes to the lag phenomenon.

journal_name

J Fish Biol

journal_title

Journal of fish biology

authors

Wood CM,Pane EF,Heigenhauser GJF

doi

10.1111/jfb.14461

subject

Has Abstract

pub_date

2020-10-01 00:00:00

pages

1242-1246

issue

4

eissn

0022-1112

issn

1095-8649

journal_volume

97

pub_type

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