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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Nakamura, S. Shimizu, Y. Shirahase, H. Kanda, M. Kurahashi, K. Usui, H. |
| Description | Author Affiliation: Shirahase H ( Pharmacology Division, Kyoto University, Japan.) |
| Abstract | 1. We have examined whether three natural tachykinins, substance P (SP), neurokinin A (NKA) and neurokinin B (NKB) induce an endothelium-dependent contraction (EDC) in the rabbit isolated intrapulmonary artery. 2. Removal of the endothelium almost abolished the contraction induced by SP (10(-8) M) while it did not attenuate the contraction induced by SP (10(-7) M), NKA (10(-9) - 10(-7) M) or NKB (10(-8) and 10(-7) M). 3. The EDC induced by SP (10(-8) M) was abolished by NK1 antagonists (FK-888, CP-96345, CP-99994 and SR-140333) but not by an NK2 antagonist (SR-48968). 4. The EDC induced by SP was attenuated by cyclo-oxygenase inhibitors (aspirin and indomethacin), thromboxane A2 (TXA2) synthetase inhibitors (OKY-046, KY-234 and KY-063) and a TXA2 antagonist (S-1452). 5. The rank order of potency causing endothelium-independent contraction (EIC) was NKA > NKB > SP. The EIC induced by SP (10(-7) M) was attenuated by an NK2 antagonist but not by NK1 antagonists, cyclo-oxygenase inhibitors, TXA2 synthetase inhibitors or a TXA2 antagonist. 6. In conclusion, SP at 10(-8) M induces EDC via endothelial NK1 receptors and TXA2 production, and SP at 10(-7) M induces EIC via NK2 receptors in the rabbit intrapulmonary artery. |
| ISSN | 00071188 |
| e-ISSN | 14765381 |
| Journal | British Journal of Pharmacology |
| Issue Number | 7 |
| Volume Number | 115 |
| Language | English |
| Publisher | Wiley Online Library(on behalf of The British Pharmacological Society) |
| Publisher Date | 1995-08-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Open |
| Subject Keyword | Endothelium, Vascular Physiology Muscle, Smooth, Vascular Receptors, Neurokinin-1 Thromboxane A2 Animals Cyclooxygenase Inhibitors Pharmacology Drug Effects In Vitro Techniques Muscle Contraction Neurokinin A Neurokinin B Neurokinin-1 Receptor Antagonists Rabbits Receptors, Neurokinin-2 Substance P Tachykinins Antagonists & Inhibitors Thromboxane-A Synthase |
| Content Type | Text |
| Resource Type | Article |
| Subject | Pharmacology |
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