...Jodie L. Rummer; Colin J. Brauner SUMMARY During a generalized acidosis in rainbow trout, catecholamines are released into the blood, activating red blood cell (RBC) Na + /H + exchange (βNHE), thus protecting RBC intracellular pH (pH i ) and subsequent O 2 binding at the gill. Because...

... physiological and cellular stress responses following a 1 h heat shock in juvenile fish in dominance hierarchies. We measured stress hormone (cortisol and catecholamines) concentrations and blood, brain and liver tissue levels of three heat shock proteins (HSPs), the stress inducible HSP70, the constitutive...

...Bruno Tota; Maria Carmela Cerra; Alfonsina Gattuso Summary In the past 50 years, extensive evidence has shown the ability of vertebrate cardiac non-neuronal cells to synthesize and release catecholamines (CA). This formed the mindset behind the search for the intrinsic endocrine heart properties...

..., in that they possess a moderate Root effect and a choroid rete at the eye, but lack the RBC βNHE and the SB system. REFERENCES Alexander R. M. ( 1966 ). Physical aspects of swimbladder function . Biol. Rev. 41 , 141 - 176 . Berenbrink M. , Bridges C. ( 1994 ). Catecholamine...

... with a strong preference for aromatic catechol-branched substrates, especially phenylalanine and its derivatives tyrosine and L-DOPA,but not catecholamines. It represents a previously unknown SNF phenotype, and also appears to be the first sodium-dependent B 0 type transporter with a narrow selectivity...

...B. McNeill; S. F. Perry SUMMARY An in situ saline-perfused posterior cardinal vein preparation was used to assess the role of nitric oxide (NO) in the regulation of basal and stimulus-evoked catecholamine secretion from rainbow trout Oncorhynchus mykiss chromaffin cells. Addition of the NO donor...

...Brian McNeill; Colin J. Montpetit; Steve F. Perry SUMMARY The goal of the present study was to assess the catecholamine secretory capabilities of rainbow trout Oncorhynchus mykiss chromaffin cells experiencing desensitization of the nicotinic receptor. It was hypothesized that the potential...

...Colin J. Montpetit; Arash Shahsavarani; Steve F. Perry SUMMARY The current model for the neuronal control of catecholamine release from piscine chromaffin cells advocates that the neurotransmitters vasoactive intestinal polypeptide (VIP) and pituitary adenylate cyclase-activating polypeptide (PACAP...

... important) chemoreceptive sites that are not confined to the first gill arch. Plasma catecholamine levels were elevated during hypercarbia,and this response was unaffected by prior gill extirpation. To assess whether the CO 2 chemoreceptors of the first gill arch were sensing water and/or blood P CO 2...

... alone. Administration of exogenous catecholamines(10 and 100 nmol kg -1 adrenaline) to fish with intact brains and minimal surgical preparation reduced both respiratory frequency and amplitude,suggesting that humoral release of adrenaline also could not be responsible for the increase in breathing...

...Katherine N. Lapner; Steve F. Perry SUMMARY Experiments were performed in vivo on chronically cannulated adult rainbow trout ( Oncorhynchus mykiss ) to assess the involvement of serotonergic or muscarinic receptor stimulation or activation of the renin–angiotensin system in eliciting catecholamine...

...A. Lacoste; S. K. Malham; A. Cueff; F. Jalabert; F. Gélébart; S. A. Poulet ABSTRACT Catecholamines and pro-opiomelanocortin (POMC)-derived peptides, some of the central regulators of the stress-response systems of vertebrates, are also present in invertebrates. However, studies are needed...

... hypercapnia hypercarbia systemic resistance catecholamine carbon dioxide chemoreceptor hyperoxia acetazolamide cardiovascular It is generally accepted that O 2 (rather than CO 2 /H + ) chemoreceptors predominate in controlling physiological function in fishes (e.g. Cameron, 1989 ). Certainly...

..., immature erythrocytes to catecholamine stimulation was greater than that of mature erythrocytes. In addition, the membrane fluidity, measured using the steady-state fluorescence polarisation method, was greater in anaemic fish after 24 days of recovery from bleeding than in control fish. Since blood from...

... cell nicotinic receptors and (ii) to assess the ability of fish to secrete catecholamines during acute hypoxia with or without functional nicotinic receptors. Intra-arterial injection of nicotine (6.0×10 −7 mol kg −1 ) caused a rapid increase in plasma adrenaline and noradrenaline levels; the magnitude...

... , but rather post-exercise inactivity. * e-mail: [email protected] 05 01 2000 10 02 2000 © 2000 by Company of Biologists 2000 exercise cortisol catecholamine glycogen lactate muscle swimming fatigue rainbow trout Oncorhynchus mykiss Metabolic...

... pressures and systemic vascular resistance during hypercapnia but did not influence the CO 2 -induced bradycardia. Plasma levels of catecholamines did not change during hypercapnia, and therefore the stimulation of the systemic α-adrenoreceptors presumably reflected increased sympathetic nerve activity...

...Colin J. Montpetit; Steve F. Perry ABSTRACT The goal of the present investigation was to assess the relative involvement of nicotinic and muscarinic cholinergic receptors in the neuronal control of catecholamine secretion from the chromaffin tissue of rainbow trout ( Oncorhynchus mykiss...

...Nicholas J. Bernier; John E. McKendry; Steve F. Perry ABSTRACT The stimulatory effects of angiotensin II (Ang II) on catecholamine release and the contributions of the renin–angiotensin system, humoral catecholamines and adrenergic nerves to blood pressure regulation were investigated in rainbow...

... of Biologists 1999 invertebrate cephalopod catecholamine 5-hydroxytryptamine serotonin adenylate cyclase high-performance liquid chromatography monoamine heart cephalopod Sepia officinalis Within the Mollusca, the cardiovascular system of the dibranchiate cephalopods is uniquely...