2003
DOI: 10.1152/ajpregu.00654.2001
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Abstract: Renewed interest in the use of the embryonic chicken as a model of perinatal cardiovascular regulation has inspired new questions about the control mechanisms that respond to acute perturbations, such as hypoxia. The objectives of this study were to determine the cardiovascular responses, the regulatory mechanisms involved in those cardiovascular responses, and whether those mechanisms involved the central nervous system (CNS) of embryonic chickens. Heart rate (f(H)) and blood pressure were measured in chicken… Show more

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Cited by 60 publications
(73 citation statements)
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“…1). This finding is in agreement with previous studies, which have consistently shown chronic hypoxia to retard growth in embryos from all major clades of extant vertebrates: fish (Sundt-Hansen et al, 2007), amphibians (Bradford and Seymour, 1988;Mills and Barnhardt, 1999), mammals (Mortola et al, 2000;Zamudio et al, 2005;Julian et al, 2007); as well as reptiles: squamates (Herman and Ingermann, 1996;Andrews, 2001), turtles (Kam, 1993), crocodilians Crossley and Altimiras, 2005) and birds (Wangensteen et al, 1974;Black and Snyder, 1980;Xu and Mortola, 1988;Dzialowski et al, 2002;Crossley et al, 2003b) (reviewed by Chan and Burggren, 2005). Most recently, domestic chicken eggs have become a popular model to study the effects of chronic hypoxia on embryonic growth at altitude (Giussani et al, 2007).…”
Section: Growth Under Hypoxiasupporting
confidence: 93%
See 1 more Smart Citation
“…1). This finding is in agreement with previous studies, which have consistently shown chronic hypoxia to retard growth in embryos from all major clades of extant vertebrates: fish (Sundt-Hansen et al, 2007), amphibians (Bradford and Seymour, 1988;Mills and Barnhardt, 1999), mammals (Mortola et al, 2000;Zamudio et al, 2005;Julian et al, 2007); as well as reptiles: squamates (Herman and Ingermann, 1996;Andrews, 2001), turtles (Kam, 1993), crocodilians Crossley and Altimiras, 2005) and birds (Wangensteen et al, 1974;Black and Snyder, 1980;Xu and Mortola, 1988;Dzialowski et al, 2002;Crossley et al, 2003b) (reviewed by Chan and Burggren, 2005). Most recently, domestic chicken eggs have become a popular model to study the effects of chronic hypoxia on embryonic growth at altitude (Giussani et al, 2007).…”
Section: Growth Under Hypoxiasupporting
confidence: 93%
“…This effect has been demonstrated in internally pipped chicken embryos (Sbong and Dzialowski, 2007), which possess a cardiac shunt via the ductus arteriosus, analogous to the crocodilian cardiac shunt via the left aorta (Ewer, 1950). The similarity of cardiovascular control in embryonic birds and alligators (Crossley et al, 2003a;Crossley et al, 2003b;Crossley et al, 2003c) suggests that hyperoxia may inhibit shunting in alligators. As cardiac shunting can induce hypometabolism in reptiles (Hicks and Wang, 1999;Hicks, 2002), chronic inhibition of shunting due to atmospheric hyperoxia is likely to cause a hypermetabolic state in alligators.…”
Section: Metabolic Ratesmentioning
confidence: 91%
“…It was earlier demonstrated to depend on the age of the chick embryo and it includes a complex changes in the different functional systems [29][30][31][32][33][34][35]. Our study has added data on the changes in embryonic motor activity to the general picture of the integrated response.…”
Section: Resultsmentioning
confidence: 74%
“…It was demonstrated that it induced a rapid, integrated response, numerous functional systems being involved in the prevention of damage to the embryo. This response includes a decrease in the PO 2 of the blood; an increase in the blood catecholamine level; hypotensive bradycardia; redistribution of blood flow to vital organs, such as the brain, adrenals, and heart; and a decrease in the frequency of the amniotic contraction [29][30][31][32][33][34][35]. At the same time, changes in embryonic motility during acute hypoxia have been poorly studied.…”
Section: Introductionmentioning
confidence: 99%
“…Previous research showed that hypoxia could lead to the greater speed of heart growth (Chan and Burggren, 2005) or effect the heart rate in chicken embryos (Crossley et al, 2003). Some causative factors to these phenomena may be regulated by HIF1a, such as the a-adrenergic receptor, which increased the expression by HIF1a regulation in hypoxia (French, 2005).…”
Section: Discussionmentioning
confidence: 96%