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Species-specific responses of muscle lactate dehydrogenase isozymes to increased contractile activity

  • Jean-Aimé Simoneau
  • Dirk Pette
Heart, Circulation, Respiration and Blood; Environmental and Exercise Physiology Short Communication

Abstract

Analyses of lactate dehydrogenase (LDH) isozymes were performed in normal and chronically stimulated (10 Hz, 10 h/d) tibialis anterior (TA) muscles of the mouse, rat, guinea pig, and rabbit. The electrophoretic mobilities of the individual LDH isozymes of normal muscles revealed speciesspecific patterns. Stimulation up to 28 days evoked increases in the percentage of the H-subunit of LDH. The absolute increase was highest in the rabbit, intermediate in the guinea pig and rat, and lowest in the mouse. The extent of the M- to H-subunit exchange, thus, appeared to be inversely correlated with the basal aerobic-oxidative capacities of the investigated muscles. In addition, a relationship between the expression of the H-subunit or LDH and the increase in aerobic-oxidative capacity became evident from these stimulation-induced processes of metabolic adaptation.

Key words

Chronic, low-frequency nerve stimulation Fast-twitch skeletal muscle Lactate dehydrogenase isozymes Species differences 

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Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • Jean-Aimé Simoneau
    • 1
  • Dirk Pette
    • 1
  1. 1.Fakultät für BiologieUniversität KonstanzKonstanzFederal Republic of Germany

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