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Pharmacological analysis of nerves supplying the oesophagus.
Acta Physiol Hung
September 1997
Department of Pharmacology, University Medical School of Pécs, Hungary.
Morphological studies indicate that cholinergic, peptidergic and "nitrergic" (nitric oxide releasing) nerves supply the oesophageal muscle. In the present in vitro study, intramural nerves of guinea pig and human oesophagus were activated by means of the ganglion stimulating drug nicotine and electrical field stimulation (EFS) in organ bath experiments. In general, stimulation-induced primary contractions were diminished by atropine, while non-adrenergic, non-cholinergic (NANC) relaxations and after-contractions were inhibited by the NO-synthase inhibitor NG-nitro-L-arginine (L-NNA).
View Article and Find Full Text PDFThe opioid/anti-opioid balance in shock: a new target for therapy in resuscitation.
Resuscitation
August 1995
Department of Biomedical Sciences, University of Modena, Italy.
Teleologically, pain is of paramount importance for survival and induces the organism to cope in an active way with aggressions from a basically hostile environment. While the activation of endogenous analgesic (opioid) systems typically occurs in conditions of surrender (pre-terminal conditions, sustained tortures, etc.), the activation of endogenous anti-analgesic systems triggers mechanisms of active or passive defence (such as camouflage) aimed at survival.
View Article and Find Full Text PDFSuperior cervical ganglion (SCG)-mediated effect of Pilocarpine (pilo.) on salivation of the rat submandibular gland was investigated. A total of 32 SD male rats, aged 12 weeks was divided into 4 experimental groups I to IV.
View Article and Find Full Text PDFThe synthesis of a series of tertiary and quaternary cyclic analogues (isoarecolinol, dihydroisoarecolinol, arecolinol, and 3-pyrroline-3-carbinol derivatives) of [4-[[N-(3-chlorophenyl)carbamoyl]oxy]-2-butynyl]trimethylammonium chloride (McN-A-343) (1), a selective stimulant of muscarinic receptors in sympathetic ganglia (so-called M1 receptors), is reported. The compounds 3-10 were tested for muscarinic ganglion-stimulating activity by recording blood pressure responses in pithed rats. All tertiary compounds tested had no ganglion-stimulating activity.
View Article and Find Full Text PDFPreparation of analogs of 4-[N-(3-chlorophenyl)carbamoyloxy]-2-butynyltrimethylammonium chloride (1, McN-A-343), the isomeric 2-trimethylammoniomethyl-3-[N-(4-chlorophenyl)carbamoyloxymethyl]bicyclo [2.2.1]hept-5-ene iodides (10-13), and the corresponding -bicyclo[2.
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