| A comparison of the cardiovascular effects of dobutamine and a new dopamine derivative (D4975) during shock induced by E. coli endotoxin. | |
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MedLine Citation:
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PMID: 7002244 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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1 The effects of a newly developed dopamine-xanthine derivative, 7-propyl-theophylline-dopamine (D4975) and of dobutamine have been examined in anaesthetized cats before and after the induction of shock with E. coli endotoxin. 2 Both D4975 and dobutamine caused dose-related increases in left ventricular (LV) dP/dtmax (and LVdP/dt at fixed isovolumic pressures. Significantly smaller increases in LVdP/dtmax occurred as early as 0.5 to 1 h after endotoxin, with maximal attenuation at 1 to 2 h and some improvement in sensitivity in cats surviving 2 to 4 h. The maximum response to each drug was markedly reduced in shock. 3 Neither D4975 nor dobutamine had significant effects on heart rate. D4975 caused dose-related increases in systemic arterial blood pressure which were smaller during shock, the changes in responsiveness following those in LVdP/dtmax. 4 Possible mechanisms responsible for changing myocardial sensitivity to these and other agents are discussed. It is concluded that D4975 may be more useful in the treatment of shock than either dopamine or dobutamine because (a) it is more potent during shock than dobutamine (perhaps as a result of phosphodiesterase inhibition by the theophylline component of D4975); (b) its action is longer-lasting than dobutamine or dopamine and (c) like dobutamine, its effect on heart rate is insignificant. |
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Authors:
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D McCaig; J R Parratt |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: British journal of pharmacology Volume: 69 ISSN: 0007-1188 ISO Abbreviation: Br. J. Pharmacol. Publication Date: 1980 Aug |
Date Detail:
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Created Date: 1981-02-26 Completed Date: 1981-02-26 Revised Date: 2009-11-18 |
Medline Journal Info:
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Nlm Unique ID: 7502536 Medline TA: Br J Pharmacol Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 651-6 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Blood Pressure / drug effects* Catecholamines / pharmacology* Cats Dobutamine / pharmacology* Dopamine / analogs & derivatives*, pharmacology Endotoxins Escherichia coli Female Heart / drug effects* Heart Rate / drug effects Male Shock, Septic / drug therapy* Theophylline / analogs & derivatives*, pharmacology |
| Chemical | |
Reg. No./Substance:
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0/Catecholamines; 0/Endotoxins; 34368-04-2/Dobutamine; 58-55-9/Theophylline; 71201-33-7/7-propyltheophylline dopamine |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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