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Acetylcholinesterase in singly and multiply innervated muscles of normal and dystrophic chickens. II. Effects of denervation

✍ Scribed by Linkhart, T. A. ;Wilson, B. W.

Publisher
John Wiley and Sons
Year
1975
Tongue
English
Weight
793 KB
Volume
193
Category
Article
ISSN
0022-104X

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✦ Synopsis

Abstract

Neural regulation of mature normal fast twitch muscle of the chicken suppresses high activity, extrajunctional localization, and isozyme forms of acetylcholinesterase (AChE) characteristic of embryonic, denervated and dystrophic muscle. Normal adult slow tonic muscle of the chicken retains intermediate levels of activity and embryonic isozyme forms but not extrajunctional activity; it is not affected by muscular dystrophy. The hypothesis that neural regulation of the AChE system is lacking in slow tonic muscle and thus not affected by dystrophy was tested by denervating the fast twitch posterior latissimus dorsi and slow tonic anterior latissimus dorsi muscles of normal and dystrophic chickens. Extrajunctional AChE activity and embryonic isozyme forms increased, then declined, in both muscles. The results suggest that control of AChE is qualitatively similar in slow tonic and fast twitch muscle of the chicken.

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