13 结果
The cough response following inhalation challenge with the sensory nerve irritant resiniferatoxin was compared with that of capsaicin and citric acid in guinea-pig and man. Capsaicin and citric acid gave comparable dose-response curves in the two species. The mean (+/- SEM) concentration producing
1. Endogenous neuronal lipid mediator anandamide, which can be synthesized in the lung, is a ligand of both cannabinoid (CB) and vanilloid receptors (VR). The tussigenic effect of anandamide has not been studied. The current study was designed to test the direct tussigenic effect of anandamide in
Ethanol is a chemical irritant able to induce a large variety of effects in the airways. It has been reported that ethanol sensitizes the transient receptor potential vanilloid-1 (TRPV1) to various stimuli and inhalation of ethanol enhances the cough mediated by TRPV1 activation (capsaicin) in
A lowered threshold to the cough response frequently accompanies chronic airway inflammatory conditions. However, the mechanism(s) that from chronic inflammation results in a lowered cough threshold is poorly understood. Irritant agents, including capsaicin, resiniferatoxin, and citric acid, elicit
BACKGROUND
Nociceptin/orphanin FQ has been reported to inhibit capsaicin- and mechanically provoked cough in animal models, but the mechanism of this effect has not been elucidated.
OBJECTIVE
The objectives of this study were to determine whether nociceptin inhibits acid-evoked cough in conscious
A wealth of literature describes the approaches that investigators have used to develop animal models of cough. The relevance of the models to cough in man and disease is still unknown. Furthermore, the choice of animal model that is used will depend on the purpose of the investigation and what
BACKGROUND
Iodo-resiniferatoxin (I-RTX) has recently been described as an ultra potent antagonist of the transient receptor potential vanilloid-1 (TRPV1).
METHODS
The ability of I-RTX to inhibit cough induced by inhalation of two putative TRPV1 stimulants (capsaicin and citric acid) was tested in
Two nonpeptide tackykinin NK2 receptor antagonists have now been described, SR 48968 and GR 159897. These drugs are highly specific and very potent antagonists with affinity (binding and in vitro study) for NK2 receptors in the subnanomolar range (pKi = 9-10), without intrinsic activity. They act
An isolated perfused lung model was developed in which the mechanisms of regulation of sensory neuropeptide overflow and bronchoconstrictor responses evoked by antidromic vagal nerve stimulation or various irritants could be studied. For further comparison, non-adrenergic non-cholinergic (NANC)
In the present study we evaluated the effects of ruthenium red, a blocker of transmembrane Ca2+ fluxes, on bronchoconstriction and the release of calcitonin gene-related peptide-like immunoreactivity induced by different stimuli in the isolated perfused guinea-pig lung. Vagal stimulation (1 Hz, 1
American guidelines, unlike European guidelines, support the use of antihistamines as a first line of treatment for some causes of chronic cough. Transient receptor potential vanilloid-1 (TRPV1) is an ion channel activated by the tussive agents capsaicin, resiniferatoxin, and protons. It is
Transient receptor potential vanilloid 1 (TRPV1) is an ion channel expressed on sensory neurons triggering an influx of cations. TRPV1 receptors function as homotetramers responsive to heat, proinflammatory substances, lipoxygenase products, resiniferatoxin, endocannabinoids, protons, and peptide
TRPV1 is a well-characterised channel expressed by a subset of peripheral sensory neurons involved in pain sensation and also at a number of other neuronal and non-neuronal sites in the mammalian body. Functionally, TRPV1 acts as a sensor for noxious heat (greater than ~42 °C). It can also be