Regional variations of vasomotion to G-protein coupled receptor agonists following heat stress in rats
(2010) In Journal of Pharmacy and Pharmacology 62(3). p.315-322- Abstract
- Objectives This study was designed to compare vascular contractile and relaxing responses to G-protein coupled receptor agonists among the different regions of arteries following heat stress in rats. Methods Heat exposure was performed by increasing the internal temperature of the rats to 42 degrees C for 15 min. After heat stress for 48 h, a rnyograph system was used to monitor the contractile responses in rat renal, femoral and mesenteric arteries to agonists of endothelin type B (ETB) receptor, endothelin type A (ETA) receptor, serotonin receptor and alpha-adrenoceptor, respectively. In addition, calcitonin gene-related peptide (CGRP)-induced vasodilation was studied. Key findings The results showed that heat stress induced decreased... (More)
- Objectives This study was designed to compare vascular contractile and relaxing responses to G-protein coupled receptor agonists among the different regions of arteries following heat stress in rats. Methods Heat exposure was performed by increasing the internal temperature of the rats to 42 degrees C for 15 min. After heat stress for 48 h, a rnyograph system was used to monitor the contractile responses in rat renal, femoral and mesenteric arteries to agonists of endothelin type B (ETB) receptor, endothelin type A (ETA) receptor, serotonin receptor and alpha-adrenoceptor, respectively. In addition, calcitonin gene-related peptide (CGRP)-induced vasodilation was studied. Key findings The results showed that heat stress induced decreased contractions mediated by alpha-adrenoceptors and serotonin receptors (at lower concentration), while it increased contraction mediated by endothelin ETB receptors and enhanced relaxation mediated by CGRP receptors in the renal artery. Heat stress increased contractions mediated by endothelin ETB receptors, endothelin ETA receptors and alpha-adrenoceptors in the femoral artery. In the mesenteric artery, heat stress increased contractions mediated by endothelin ETB and serotonin receptors and relaxation mediated by CGRP receptors. Conclusions The vasomotor responses to the G-protein coupled receptor agonists with altered vascular contractions and relaxations were different in rat renal, femoral and mesenteric arteries after heat stress. This might have contributed to the redistribution of blood flow and aids understanding of the preconditioning phenomenon. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1586988
- author
- Li, Jie ; Cao, Yong-Xiao ; Chen, Kun-Lun ; Cao, Lei ; Ma, Zhao and Xu, Cang-Bao LU
- organization
- publishing date
- 2010
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- heat stress rat, artery, G-protein coupled receptor, vasomotion
- in
- Journal of Pharmacy and Pharmacology
- volume
- 62
- issue
- 3
- pages
- 315 - 322
- publisher
- Oxford University Press
- external identifiers
-
- wos:000276259300005
- scopus:77950245009
- ISSN
- 0022-3573
- DOI
- 10.1211/jpp/62.03.0005
- language
- English
- LU publication?
- yes
- id
- 98e09047-a9d9-4d6e-afaf-648a2824a057 (old id 1586988)
- date added to LUP
- 2016-04-01 13:04:20
- date last changed
- 2024-10-09 21:02:48
@article{98e09047-a9d9-4d6e-afaf-648a2824a057,
abstract = {{Objectives This study was designed to compare vascular contractile and relaxing responses to G-protein coupled receptor agonists among the different regions of arteries following heat stress in rats. Methods Heat exposure was performed by increasing the internal temperature of the rats to 42 degrees C for 15 min. After heat stress for 48 h, a rnyograph system was used to monitor the contractile responses in rat renal, femoral and mesenteric arteries to agonists of endothelin type B (ETB) receptor, endothelin type A (ETA) receptor, serotonin receptor and alpha-adrenoceptor, respectively. In addition, calcitonin gene-related peptide (CGRP)-induced vasodilation was studied. Key findings The results showed that heat stress induced decreased contractions mediated by alpha-adrenoceptors and serotonin receptors (at lower concentration), while it increased contraction mediated by endothelin ETB receptors and enhanced relaxation mediated by CGRP receptors in the renal artery. Heat stress increased contractions mediated by endothelin ETB receptors, endothelin ETA receptors and alpha-adrenoceptors in the femoral artery. In the mesenteric artery, heat stress increased contractions mediated by endothelin ETB and serotonin receptors and relaxation mediated by CGRP receptors. Conclusions The vasomotor responses to the G-protein coupled receptor agonists with altered vascular contractions and relaxations were different in rat renal, femoral and mesenteric arteries after heat stress. This might have contributed to the redistribution of blood flow and aids understanding of the preconditioning phenomenon.}},
author = {{Li, Jie and Cao, Yong-Xiao and Chen, Kun-Lun and Cao, Lei and Ma, Zhao and Xu, Cang-Bao}},
issn = {{0022-3573}},
keywords = {{heat stress rat; artery; G-protein coupled receptor; vasomotion}},
language = {{eng}},
number = {{3}},
pages = {{315--322}},
publisher = {{Oxford University Press}},
series = {{Journal of Pharmacy and Pharmacology}},
title = {{Regional variations of vasomotion to G-protein coupled receptor agonists following heat stress in rats}},
url = {{http://dx.doi.org/10.1211/jpp/62.03.0005}},
doi = {{10.1211/jpp/62.03.0005}},
volume = {{62}},
year = {{2010}},
}