Document Detail


Involvement of the Autonomic Nervous System in Diurnal Variation of Corrected QT Intervals in Common Marmosets.
MedLine Citation:
PMID:  23363785     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Our previous study has shown that the corrected QT (QTc) interval of the electrocardiogram is longer during the dark period than during the light period in telemetered common marmosets. In the present study, we investigated the involvement of sympathetic and parasympathetic nervous activities in the changes of QTc interval associated with the light-dark cycle. Telemetry transmitters were implanted in six common marmosets to continuously record the electrocardiogram. The QT intervals obtained were corrected for the RR interval by applying individual probabilistic QT-rate correction formulae. Power spectral analysis of heart rate variability was performed to quantify each autonomic nervous function. Changes in QTc intervals and autonomic nervous tones were associated with the light-dark cycle. Parasympathetic nervous activity and QTc intervals significantly increased by approximately 10 ms during the dark period. Atropine, a muscarinic receptor antagonist, suppressed the increased parasympathetic tone and QTc prolongation during the dark period. In contrast, propranolol, a β-adrenoceptor antagonist, decreased the sympathetic activity and increased QTc intervals during the light period. These results suggest that the parasympathetic nerve functions prolong QTc intervals during the dark period, while the sympathetic nerve functions shorten them during the light period in common marmosets.
Authors:
Masaki Honda; Ryuichi Komatsu; Takehito Isobe; Mitsuyasu Tabo; Tomohisa Ishikawa
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-31
Journal Detail:
Title:  Journal of pharmacological sciences     Volume:  -     ISSN:  1347-8648     ISO Abbreviation:  J. Pharmacol. Sci.     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-31     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101167001     Medline TA:  J Pharmacol Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Research Division, Chugai Pharmaceutical Co., Ltd., Japan.
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