Histochemical properties of intrafusal fibers in the soleus muscle of the aged rat.
ATPase reaction profiles of intrafusal fibers in the muscle spindle of the soleus muscle of 135-week-old rats were examined. Nuclear bag1 fibers contained an acid- and alkaline-labile form of the enzyme or an acid-labile and alkaline-stabile form, nuclear bag2 fibers contained an acid- and alkaline-stabile form, and nuclear chain fibers contained an acid-labile and alkaline-stabile form. These results indicate that the enzyme histochemical heterogeneity of intrafusal fibers is well-preserved during ageing.
Ishihara
A
A
College of General Education, University of Tokushima, Japan.
D000251:Adenosine Triphosphatases / Q000032:analysis / Q000378:metabolism*; D000375:Aging / Q000378:metabolism*; D000818:Animals; D005260:Female; D006651:Histocytochemistry; D009470:Muscle Spindles / Q000032:analysis / Q000201:enzymology; D009132:Muscles / Q000032:analysis / Q000201:enzymology*; D051381:Rats; D011919:Rats, Inbred Strains
D000251:Adenosine Triphosphatases