Abstract:
:Intracellular recording was used to study the effect of uncouplers of oxidative phosphorylation on miniature endplate potentials (m.e.p.p.s) in skeletal muscles from dystrophic mice and their clinically normal littermates. Control m.e.p.p. frequency in muscles from dystrophic mice was not significantly different from normal. In the presence of the inhibitors 2,4-dinitrophenol (10(-4) M) or guanidine (5 X 10(-3) M) m.e.p.p. frequency was increased less in muscles from dystrophic mice than that in muscles from normal littermates. In contrast, raising the extracellular calcium concentration, depolarising nerve terminals with potassium or motor nerve stimulation all caused a similar increase in m.e.p.p. frequency in normal and dystrophic muscles. It is suggested that there is a difference in the way in which calcium is stored in dystrophic nerve terminals but that their ability to regulate free calcium is normal.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Kelly S,Morgan G,Smith Jdoi
10.1016/0014-2999(88)90637-1subject
Has Abstractpub_date
1988-02-16 00:00:00pages
93-9issue
1eissn
0014-2999issn
1879-0712pii
0014-2999(88)90637-1journal_volume
147pub_type
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journal_title:European journal of pharmacology
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journal_title:European journal of pharmacology
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journal_title:European journal of pharmacology
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