Document Detail


Autonomic regulation of the heart during digestion and aerobic swimming in the European sea bass (Dicentrarchus labrax).
MedLine Citation:
PMID:  20362690     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The autonomic regulation of the heart was studied in European sea bass (Dicentrarchus labrax) during digestion and aerobic exercise by measuring cardiac output (Q), heart rate (f(H)), stroke volume (V(s)) and oxygen consumption (MO(2)) before and after pharmacological blockade by intraperitoneal injections of atropine and propranolol. The significant rise in MO(2) (134+/-14 to 174+/-14 mg kg(-)(1)h(-)(1)) 6h after feeding (3% body mass) caused a significant tachycardia (47.7+/-10.9 to 72.6+/-7.2 beats min(-)(1)), but only a small elevation of Q. MO(2) of fasting fish increased progressively with swimming speed (0.7-2.1BLs(-)(1)) causing a significant tachycardia (43+/-6 to 61+/-4 mL min(-)(1)kg(-)(1)) and increased Q but V(s) did not change. Inactive fish were characterized by a high vagal tone (98.3+/-21.7%), and the tachycardia during digestion and exercise was exclusively due to a reduction of vagal tone, while the adrenergic tone remained low during all conditions. Intrinsic f(H), revealed after double autonomic blockade, was not affected by digestion (71+/-4 and 70+/-6 min(-)(1), respectively), indicating that non-adrenergic, non-cholinergic (NANC) factors do not contribute to the tachycardia during digestion in sea bass.
Authors:
Nina K Iversen; Aurélie Dupont-Prinet; Inge Findorf; David J McKenzie; Tobias Wang
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-04-01
Journal Detail:
Title:  Comparative biochemistry and physiology. Part A, Molecular & integrative physiology     Volume:  156     ISSN:  1531-4332     ISO Abbreviation:  Comp. Biochem. Physiol., Part A Mol. Integr. Physiol.     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-06-23     Completed Date:  2011-01-25     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9806096     Medline TA:  Comp Biochem Physiol A Mol Integr Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  463-8     Citation Subset:  IM    
Copyright Information:
Copyright (c) 2010 Elsevier Inc. All rights reserved.
Affiliation:
Zoophysiology, Department of Biological Sciences, University of Aarhus, Denmark. nina.iversen@biology.au.dk
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Physiological / drug effects,  physiology
Animals
Atropine / administration & dosage
Autonomic Nervous System / drug effects,  physiology*
Bass / physiology*
Cardiac Output / drug effects,  physiology
Digestion / drug effects,  physiology*
Fasting
Heart / drug effects,  innervation*,  physiology*
Heart Rate / drug effects,  physiology
Oxygen Consumption / drug effects,  physiology
Physical Conditioning, Animal / physiology
Propranolol / administration & dosage
Swimming / physiology*
Chemical
Reg. No./Substance:
51-55-8/Atropine; 525-66-6/Propranolol

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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