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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Hay, D. W. Page, C. P. Muccitelli, R. M. Spina, D. |
| Description | Author Affiliation: Hay DW ( Department of Pharmacology, SmithKline Beecham Pharmaceuticals, King of Prussia, PA 19406-930.) |
| Abstract | 1. In co-axial bioassays, in the presence of indomethacin, addition of histamine (100 microM) or methacholine (100 microM) to guinea-pig trachea produced an epithelium-dependent relaxation of precontracted rat aorta which was associated with an approximately 2 fold elevation in tissue levels of guanosine 3':5'-cyclic monophosphate (cyclic GMP). Removal of the airway epithelium abolished the histamine-induced relaxation of rat aorta and the associated increase in intracellular cyclic GMP. 2. Epithelium-dependent relaxation was not associated with altered adenosine 3':5'-cyclic monophosphate (cyclic AMP) levels in rat aorta. Unstimulated intact or denuded guinea-pig trachea also did not affect the levels of cyclic AMP or cyclic GMP in rat aorta. 3. Methylene blue (10 microM) abolished the methacholine-induced, endothelium-derived relaxing factor (EDRF)-mediated rise in intracellular cyclic GMP in rat endothelium-intact aorta alone. In contrast, methylene blue (10 microM) did not affect the methacholine-induced epithelium-dependent rise in intracellular cyclic GMP in rat endothelium-denuded aorta in the co-axial bioassay. 4. Relaxation of the rat aorta without endothelium was associated with increased levels of cyclic GMP (but not cyclic AMP) in response to sodium nitroprusside (5 nM) and of cyclic AMP (but not cyclic GMP) in response to isoprenaline (1 microM). 5. These results provide evidence that the postulated epithelium-derived inhibitory factor (EpDIF) may produce relaxation of vascular tissue via elevation in cyclic GMP levels. Furthermore, some data suggest that EpDIF may act by stimulation of the particulate, rather than the soluble form of guanylate cyclase. |
| ISSN | 00071188 |
| e-ISSN | 14765381 |
| Journal | British Journal of Pharmacology |
| Issue Number | 4 |
| Volume Number | 105 |
| Language | English |
| Publisher | Wiley Online Library(on behalf of The British Pharmacological Society) |
| Publisher Date | 1992-04-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Open |
| Subject Keyword | Biological Factors Physiology Cyclic AMP Metabolism Cyclic GMP Vasodilation Animals Aorta Drug Effects Biological Assay Epithelium Histamine Pharmacology In Vitro Techniques Indomethacin Methacholine Chloride Muscle, Smooth, Vascular Phenylephrine Rats, Inbred Strains Respiratory Physiological Phenomena Research Support, Non-U.S. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Pharmacology |
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