Linked Life Data

16387459

Source:http://linkedlifedata.com/resource/pubmed/id/16387459

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2006-5-1
pubmed:abstractText
Glycyrrhizae Radix is used to treat abdominal pain as a component of Shakuyaku-kanzo-to, a traditional Chinese medicine formulation. We aim at clarifying the antispasmodic principles of Glycyrrhizae Radix, and consequently isolated glycycoumarin as a potent relaxant on the carbamylcholine (CCh)-induced contraction of mouse jejunum. In this paper we investigated the effects and the action mechanism of glycycoumarin on the contraction of mouse jejunum. Glycycoumarin inhibited the contraction induced by various types of stimulants, such as CCh, KCl, BaCl(2), and A23187 (calcium ionophore III) with IC(50) values of 2.93+/-0.94 micromol/l (1.08+/-0.35 microg/ml), 2.59+/-0.58 micromol/l (0.95+/-0.29 microg/ml), 4.09+/-1.82 micromol/l (1.51+/-0.67 microg/ml) and 7.39+/-5.19 micromol/l (2.72+/-1.91 microg/ml), respectively, with a potency similar to that of papaverine (a representative antispasmodic for smooth muscle). Furthermore, pretreatment with glycycoumarin enhanced the relaxation induced by forskolin on CCh-evoked contraction, similar to that by pretreatment with IBMX, a non-specific inhibitor of phosphodiesterases (PDEs). Pretreatment with glycycoumarin also enhanced the relaxation effect of rolipram, a specific inhibitor of PDE isozyme 4, as pretreatment with milrinone, a specific inhibitor of isozyme 3, did. Moreover, the effect of glycycoumarin was associated with dose-dependent accumulation of cAMP, but not cGMP, in mouse jejunum. These results indicate that glycycoumarin has an inhibitory effect on smooth muscle contraction induced by various types of stimulants through the inhibition of PDEs, especially isozyme 3, followed by the accumulation of intracellular cAMP.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0378-8741
pubmed:author
pubmed:issnType
Print
pubmed:day
24
pubmed:volume
105
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
409-14
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Glycycoumarin from Glycyrrhizae Radix acts as a potent antispasmodic through inhibition of phosphodiesterase 3.
pubmed:affiliation
Department of Pharmaceutical Physiology, Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University, Toyama 930-0194, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't