AI Article Synopsis
- The study examined capillary-to-fiber ratios and mineral content in the soleus muscles of rats with compensatory hypertrophy after surgery on the gastrocnemius and plantaris muscles.
- Despite no changes in capillary-fiber ratio and mineral content, the hypertrophied muscles exhibited a significant increase in wet weight (31.6%) compared to the control, along with notable declines in residual calcium (57.1%) and total calcium (43.2%).
- The findings suggest that during muscle growth compensating for injury, calcium reserves are reduced, potentially leading to decreased muscle tension production.
Article Abstract
Capillary-to-fiber ratio and the content (mu moles/g muscle) of Na, K, Mg, Ca and Zn was measured in compensatory hypertrophied (CH) soleus muscles of adult Sprague-Dawley rats. The soleus hypertrophy was induced by unilateral tenotomy of the gastrocnemius and the plantaris muscles. Seven days after synergistic tenotomy the compensatory hypertrophied Soleus muscles showed no difference in the capillary-fiber ratio, Sr-extractable calcium ([Ca]Ext.) or the total content of Na, K, Mg and Zn. However, compared to the contralateral control side, the CH muscles showed an increase in the wet muscle weight (31.6%, P less than 0.01) and a significant decline (57.1%, P less than 0.05) in the residual calcium ([Ca]Res.) and 43.2% (P less than 0.05) decrease in the total calcium ([Ca]Total) content. It is concluded that during compensatory hypertrophy of skeletal muscles, the residual Ca reserves are significantly depleted, which may lead to a lower isometric tension generation in the muscle.
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| http://dx.doi.org/10.1016/0022-510x(86)90094-8 | DOI Listing |
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