Prejunctional modulation of cholinergic neurotransmission in the isolated guinea pig ileum
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چکیده
منابع مشابه
The role of prostacyclin in modulating cholinergic neurotransmission in guinea-pig ileum.
The mechanism of action of prostacyclin (PGI2) on isolated segments of guinea-pig terminal ileum was studied by recording the changes in isometric tension. In these preparations PGI2 (1 nM-1 microM) caused a concentration-dependent increase in muscle tension. This effect was rapid and short-lasting. PGI2-induced contractions were inhibited by atropine and potentiated by physostigmine. Hemicholi...
متن کاملPolar innervation of enteric non-cholinergic and non-adrenergic neurons in the isolated guinea-pig ileum.
To study the polarity of the efferent pathway of the myenteric plexus, recordings were made of the mechanical activity of the longitudinal muscle of isolated guinea-pig ileal segments upon stimulation with an electrical field around the myenteric plexus contained within strips of longitudinal muscle (LM-MP) continuous with each end of ileal segment. The amplitude of the contractile response to ...
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On most adrenergic and cholinergic nerve terminals, prejunctional α-adrenoceptors belonging to the α2-subtype have been identified. Activation of these receptors will decrease the release of norepinephrine. It has been reported that several isolated tissue preparations contain prejunctional dopamine receptors, the stimulation of which inhibits neurotransmission. It has remained uncertain whethe...
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Thiazolidinediones are commonly used anti-diabetic drugs. Owing to the anti-inflammatory action of TZDs as a result of there action on the PPAR gamma receptor and a proposed action on the prostaglandins, these drugs can be tried in the acute exacerbations of COPD that are also commonly found among diabetic patients. An experimental study of one week was carried out at animal house of Army Medic...
متن کاملAntihistaminic 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...
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ژورنال
عنوان ژورنال: Japanese Journal of Pharmacology
سال: 1990
ISSN: 0021-5198
DOI: 10.1016/s0021-5198(19)55455-5