Delayed evacuatory function due to specific smooth muscle reactivity in the gastrointestinal tracts of tacrine-treated rats.
Most of the side effects induced by tacrine are associated with the gastrointestinal (GI) tract. The aim of the study was to analyze the nature of radiographically registered, tacrine-induced changes in evacuatory function, as well as to find a possible correlation with the immediate in vitro action of the drug on smooth muscles from the GI tracts of rats. The tacrine dose we used reliably delayed GI passage: contrast matter was not fully evacuated, predominantly from the stomach and cecum. The delay resulted from changes in tone and peristaltic activity, specific for the various regions of the tract. These changes were associated with a superposing of the responses due to the anticholinesterase and noncholinergic action of tacrine.
Krustev
A
A
Department of Biophysics, Medical University, Plovdiv, Bulgaria.
Sirakov
V
V
Turiiski
V
V
Getova
D
D
Velkova
K
K
Prissadova
N
N
D000818:Animals; D041981:Gastrointestinal Tract / Q000000981:diagnostic imaging / Q000187:drug effects*; D005772:Gastrointestinal Transit / Q000187:drug effects*; D008297:Male; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000000981:diagnostic imaging / Q000187:drug effects*; D018697:Nootropic Agents / Q000009:adverse effects*; D010528:Peristalsis / Q000187:drug effects*; D011859:Radiography; D051381:Rats; D017208:Rats, Wistar; D013619:Tacrine / Q000009:adverse effects*