Development of tolerance to opioids in isolated longitudinal muscle strips of guinea-pig ileum
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چکیده
منابع مشابه
Antihistaminic activity of carane derivatives in isolated guinea pig ileum.
Local anesthetics (LAs) inhibit membrane depolarization by reducing sodium and potassium conductance, and subsequent displacement of calcium ions from binding sites seems to occur. Histamine release appears to be a secretory process in which calcium couples the stimulus to the exocytosis of histamine-containing granules. Furthermore, LAs are structurally similar to histamine H(1)-receptor antag...
متن کاملMuscarinic cholinergic stimulation of phosphatidylinositol turnover in the longitudinal smooth muscle of guinea-pig ileum.
1. The metabolism of phosphatidylinositol and phosphatidate was investigated in fragments of longitudinal smooth muscle from guinea-pig ileum incubated with cholinergic and anticholinergic drugs. 2. Incorporation of Pi into these lipids was enhanced by acetylcholine and carbamoylcholine. 3. The receptor responsible for triggering this response was of the muscarinic type, since (a) the response ...
متن کاملInteractions of neurogenic responses of longitudinal and circular muscle in the guinea-pig ileum.
The relationship between neurogenic responses of longitudinal and circular muscle was studied by measuring contractions and EMG or nonadrenergic, non-cholinergic (NANC) relaxations and NANC inhibitory junction potentials in different preparations of the guinea-pig ileum. NANC relaxation of longitudinal muscle was observed also without any preceding or concomitant circular muscle contraction rul...
متن کاملEffect of metoclopramide in guinea-pig ileum longitudinal muscle: evidence against dopamine-mediation.
The investigation examines the hypothesis that metoclopramide-induced potentiation of gastrointestinal motility is mediated through dopamine receptors. In vitro studies on the longitudinal muscle of the guinea-pig ileum were performed. Metoclopramide, in concentrations comparable with those seen in plasma after therapeutic doses in man, selectively potentiated the cholinergic response Dopamine ...
متن کاملVoltage sensitivity of slow wave frequency in isolated circular muscle strips from guinea pig gastric antrum.
In circular muscle preparations isolated from the guinea pig gastric antrum, regular spontaneous electrical activity (slow waves) was recorded. Under normal conditions (6 mM K+), the frequency and shape of the slow waves were similar to those observed in ordinary stomach smooth muscle preparations. When the resting membrane potential was hyperpolarized and depolarized by changing the extracellu...
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ژورنال
عنوان ژورنال: Japanese Journal of Pharmacology
سال: 1979
ISSN: 0021-5198
DOI: 10.1016/s0021-5198(19)67473-1