Document Detail

Profile of cardiovascular effects of NKH477, a novel forskolin derivative, assessed in isolated, blood-perfused dog heart preparations: comparison with isoproterenol.
MedLine Citation:
PMID:  1381017     Owner:  NLM     Status:  MEDLINE    
Cardiac and coronary vasodilator effects of NKH477, a novel water-soluble forskolin derivative, and isoproterenol, a nonselective beta-adrenoceptor full agonist, were compared in isolated, blood-perfused papillary muscle, sinoatrial (SA) node, and atrioventricular (AV) node preparations of dogs. Both agents were injected intraarterially. The two agents increased the force of contraction of the paced papillary muscle and of the unpaced muscle, and the rate of automaticity of the latter. They increased sinus rate and accelerated AV nodal conduction. In producing these cardiac effects, both agents were similar, although NKH477 was 120-350 times less potent than isoproterenol; however, NKH477 differed distinctly from isoproterenol in that the former increased coronary blood flow more greatly than the latter. Thus, NKH477 is more coronary vasodilatory than positive inotropic, and more positive inotropic than positive chronotropic. Such a cardiovascular profile of NKH477 was similar to that of forskolin, except for the duration of actions; NKH477 was longer-acting than forskolin.
O Ishizuka; M Hosono; K Nakamura
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Publication Detail:
Type:  Comparative Study; In Vitro; Journal Article    
Journal Detail:
Title:  Journal of cardiovascular pharmacology     Volume:  20     ISSN:  0160-2446     ISO Abbreviation:  J. Cardiovasc. Pharmacol.     Publication Date:  1992 Aug 
Date Detail:
Created Date:  1992-10-01     Completed Date:  1992-10-01     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7902492     Medline TA:  J Cardiovasc Pharmacol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  261-7     Citation Subset:  IM    
Research Laboratories, Pharmaceuticals Group, Nippon Kayaku, Tokyo, Japan.
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MeSH Terms
Adrenergic beta-Agonists / pharmacology*
Atrioventricular Node / drug effects
Dose-Response Relationship, Drug
Forskolin / analogs & derivatives*,  pharmacology
Heart / drug effects*
Isoproterenol / pharmacology*
Papillary Muscles / drug effects
Sinoatrial Node / drug effects
Vasodilator Agents / pharmacology*
Reg. No./Substance:
0/Adrenergic beta-Agonists; 0/Vasodilator Agents; 138605-00-2/colforsin; 66428-89-5/Forskolin; 7683-59-2/Isoproterenol

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