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  • Title: Chronic long-term electrostimulation creates a unique metabolic enzyme profile in rabbit fast-twitch muscle.
    Author: Hood DA, Pette D.
    Journal: FEBS Lett; 1989 Apr 24; 247(2):471-4. PubMed ID: 2714446.
    Abstract:
    Long-term low-frequency stimulation (up to 120 days) of rabbit fast-twitch tibialis anterior muscle led, in a first-order-like time course, to changes in enzyme activities of energy metabolism which became stable with ongoing stimulation after 50 days. The glycolytic enzymes decreased to 30-40% of their normal values, but remained 2-3-fold higher than in heart or soleus muscle. The LDH isozyme pattern ultimately resembled that of the slow-twitch soleus muscle. Citrate synthase activity increased 3.7-fold which brought this enzyme to a value 45% above that of heart. These results indicate that chronic stimulation does not simply convert the fast-twitch muscle into a soleus-like slow-twitch muscle, but creates a tissue of unique metabolic properties.
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