caa a22 4500 605514119 CHVBK 20210128100703.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s00360-015-0917-5 doi (NATIONALLICENCE)springer-10.1007/s00360-015-0917-5 Functional differences between the arteries perfusing gas exchange and nutritional membranes in the late chicken embryo [Elektronische Daten] [Riazudin Mohammed, Giacomo Cavallaro, Carolina Kessels, Eduardo Villamor] The chicken extraembryonic arterial system comprises the allantoic arteries, which irrigate the gas exchange organ (the chorioallantoic membrane, CAM) and the yolk sac (YS) artery, which irrigates the nutritional organ (the YS membrane). We compared, using wire myography, the reactivity of allantoic and YS arteries from 19-day chicken embryos (total incubation 21days). The contractions induced by KCl, the adrenergic agonists norepinephrine (NE, nonselective), phenylephrine (α1), and oxymetazoline (α2), electric field stimulation (EFS), serotonin, U46619 (TP receptor agonist), and endothelin (ET)-1 and the relaxations induced by acetylcholine (ACh), sodium nitroprusside (SNP, NO donor), forskolin (adenylate cyclase activator), and isoproterenol (β-adrenergic agonist) were investigated. Extraembryonic allantoic arteries did not show α-adrenergic-mediated contraction (either elicited by exogenous agonists or EFS) or ACh-induced (endothelium-dependent) relaxation, whereas these responses were present in YS arteries. Interestingly, the intraembryonic segment of the allantoic artery showed EFS- and α-adrenergic-induced contraction and ACh-mediated relaxation. Moreover, glyoxylic acid staining showed the presence of catecholamine-containing nerves in the YS and the intraembryonic allantoic artery, but not in the extraembryonic allantoic artery. Isoproterenol- and forskolin-induced relaxation and ET-1-induced contraction were higher in YS than in allantoic arteries, whereas serotonin- and U46619-induced contraction and SNP-induced relaxation did not significantly differ between the two arteries. In conclusion, our study demonstrates a different pattern of reactivity in the arteries perfusing the gas exchange and the nutritional membranes of the chicken embryo. The Author(s), 2015 Chicken embryo nationallicence Fetal circulation nationallicence Umbilical nationallicence Endothelium nationallicence Adrenergic nationallicence Mohammed Riazudin Department of Pediatrics, Maastricht University Medical Center (MUMC+), Research Institute Growth and Development (GROW) and Cardiovascular Research Institute Maastricht (CARIM), University of Maastricht, P. Debyelaan 25, P.O. Box 5800, 6202 AZ, Maastricht, The Netherlands aut Cavallaro Giacomo Neonatal Intensive Care Unit, Department of Clinical Sciences and Community Health, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Università degli Studi di Milano, Milan, Italy aut Kessels Carolina Department of Pediatrics, Maastricht University Medical Center (MUMC+), Research Institute Growth and Development (GROW) and Cardiovascular Research Institute Maastricht (CARIM), University of Maastricht, P. Debyelaan 25, P.O. Box 5800, 6202 AZ, Maastricht, The Netherlands aut Villamor Eduardo Department of Pediatrics, Maastricht University Medical Center (MUMC+), Research Institute Growth and Development (GROW) and Cardiovascular Research Institute Maastricht (CARIM), University of Maastricht, P. Debyelaan 25, P.O. Box 5800, 6202 AZ, Maastricht, The Netherlands aut Journal of Comparative Physiology B Springer Berlin Heidelberg 185/7(2015-10-01), 783-796 0174-1578 185:7<783 2015 185 360 https://doi.org/10.1007/s00360-015-0917-5 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00360-015-0917-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mohammed Riazudin Department of Pediatrics, Maastricht University Medical Center (MUMC+), Research Institute Growth and Development (GROW) and Cardiovascular Research Institute Maastricht (CARIM), University of Maastricht, P. Debyelaan 25, P.O. Box 5800, 6202 AZ, Maastricht, The Netherlands aut NATIONALLICENCE 700 1- Cavallaro Giacomo Neonatal Intensive Care Unit, Department of Clinical Sciences and Community Health, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Università degli Studi di Milano, Milan, Italy aut NATIONALLICENCE 700 1- Kessels Carolina Department of Pediatrics, Maastricht University Medical Center (MUMC+), Research Institute Growth and Development (GROW) and Cardiovascular Research Institute Maastricht (CARIM), University of Maastricht, P. Debyelaan 25, P.O. Box 5800, 6202 AZ, Maastricht, The Netherlands aut NATIONALLICENCE 700 1- Villamor Eduardo Department of Pediatrics, Maastricht University Medical Center (MUMC+), Research Institute Growth and Development (GROW) and Cardiovascular Research Institute Maastricht (CARIM), University of Maastricht, P. Debyelaan 25, P.O. Box 5800, 6202 AZ, Maastricht, The Netherlands aut NATIONALLICENCE 773 0- Journal of Comparative Physiology B Springer Berlin Heidelberg 185/7(2015-10-01), 783-796 0174-1578 185:7<783 2015 185 360