PMID: 7542680Aug 1, 1995Paper

Myofibrillar ATPase activity of feline muscle fibers expressing slow and fast myosin heavy chains

The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society
R J TalmadgeV R Edgerton

Abstract

The interrelationships among myofibrillar ATPase activity (Quant-mATPase), qualitative myofibrillar ATPase staining after acid (Acid-mATPase) and alkaline (Alk-mATPase) preincubations, and myosin heavy chain (MHC) composition were determined in frozen sections of soleus (Sol) and medial gastrocnemius (MG) muscle fibers from adult control cats and cats 6 months after complete spinal cord transection (Sp). Fibers were categorized as either fast, slow, or fast and slow (Fast-Slow) based on monoclonal antibody labeling. Slow fibers had low Quant-mATPase activity and stained lightly with Alk-mATPase and darkly with Acid-mATPase. Fast fibers had high Quant-mATPase activity (approximately twice that of slow fibers) and stained darkly with Alk-mATPase and lightly with Acid-mATPase. Fast-Slow fibers had intermediate Quant-mATPase activity and stained intermediately for Acid-mATPase and darkly for Alk-mATPase. There was a positive linear relationship between Alk-mATPase and Quant-mATPase for all fibers of Sol and MG from control and Sp cats. There was a negative linear relationship between Acid-mATPase and Quant-mATPase for all fibers of Sol and MG. However, within the fast fiber population of the MG there was a positive relationship bet...Continue Reading

Citations

Jun 8, 1999·The Anatomical Record·R J TalmadgeV R Edgerton
Mar 22, 2016·Endocrinology and Metabolism·Su Han ChoWook Song
Dec 13, 2006·Journal of Applied Physiology·Krzysztof E KowalskiAnthony F DiMarco
Dec 1, 1996·Journal of Applied Physiology·R J TalmadgeV R Edgerton
Jan 14, 1999·Journal of Applied Physiology·M J CastroG A Dudley

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