Summary
Transformation of structural, functional, metabolic and molecular characteristics is induced by stimulating fast-twitch muscles with the frequency pattern of a motoneuron normally innervating a slow-twitch muscle. These changes correspond to a transition of a “fast-white” into a “slow-red” muscle. Intermittent stimulation (8 h/d) does not affect the system but causes alterations of the sarcoplasmic reticulum which lead to changes in time to peak and half relaxation time. Continuous stimulation (24 h/d) induces a transformation of the muscle also at the level of the myosin system.
Zusammenfassung
Dauerstimulation schneller Muskeln mit dem Frequenzmuster langsamer Motoneurone induziert in schnellen Kaninchenmuskeln eine Transformation morphologischer, funktioneller, metabolischer und molekularer Merkmale. Diese Veränderungen entsprechen der Umwandlung eines “schnellen/weißen” in einen “langsamen/roten” Muskel. Intermittierende (8 Std/Tag) Stimulation bewirkt keine Umwandlung des Myosins, induziert aber eine solche des sarkoplasmatischen Retikulums. Kontinuierliche (24 Std/Tag) Stimulation bewirkt eine Transformation des Muskels, die auch eine Umwandlung des Myosins einschließt.
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This study was supported by the Deutsche Forschungsgemeinschaft, Sonderforschungsbereich 138 “Biologische Grenzflächen und Spezifität”.C. Heilmann ist postdoctoral fellow of the Deutsche Forschungsgemeinschaft.
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Pette, D., Heilmann, C. Transformation of morphological, functional and metabolic properties of fast-twitch muscle as induced by long-term electrical stimulation. Basic Res Cardiol 72, 247–253 (1977). https://doi.org/10.1007/BF01906369
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DOI: https://doi.org/10.1007/BF01906369