6533b82ffe1ef96bd12946f4
RESEARCH PRODUCT
Tachykinin NK(2) receptors facilitate acetylcholine release from guinea-pig isolated trachea.
Doris ErbeldingGianluigi D'agostinoHeinz Kilbingersubject
AgonistMalemedicine.medical_specialtymedicine.drug_classNeurokinin AGuinea PigsSubstance PIn Vitro TechniquesCholinechemistry.chemical_compoundPiperidinesInternal medicinemedicineAnimalsReceptorPharmacologyNeuronsReceptors Neurokinin-2Receptor antagonistAcetylcholineElectric StimulationPeptide FragmentsTracheaEndocrinologychemistryCapsaicinBenzamidesNeurokinin ACapsaicinTachykinin receptorAcetylcholinemedicine.drugdescription
The release of newly synthesised [3H]acetylcholine was evoked by electrical field stimulation (5 Hz, 600 pulses) of epithelium-deprived guinea-pig trachea strips after sensory neuropeptides depletion with 3 microM capsaicin. The selective tachykinin NK(2) receptor agonist [betaAla(8)]neurokinin A-(4-10) increased in a concentration-dependent manner the electrically-induced release of [3H]acetylcholine. The facilitatory effect was antagonised by the selective non-peptide tachykinin NK(2) receptor antagonist, SR 48968 (apparent pK(B) 8.9). The tachykinin NK(1) and NK(3) receptor agonists substance P methyl ester and senktide (both 10 and 100 nM), respectively, did not affect the evoked release of [3H]acetylcholine. It is concluded that the cholinergic nerves of guinea-pig trachea are endowed with prejunctional facilitatory tachykinin receptors of the NK(2) subtype.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-05-24 | European journal of pharmacology |