Linked Life Data

17348674

Source:http://linkedlifedata.com/resource/pubmed/id/17348674

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
7
pubmed:dateCreated
2007-3-28
pubmed:abstractText
Many studies investigating drug interactions with citrus compounds focus on the major grapefruit furanocoumarins bergamottin, dihydroxybergamottin, and the flavonoid naringenin. This study evaluated the influence of polymethoxylated flavones (PMFs), tangeretin, nobiletin, 3,5,6,7,8,3,4'-heptamethoxyflavone, and sinensetin, as well as other minor occurring citrus phenols, hesperetin, limettin, 7-OH-coumarin, 7-geranyloxycoumarin, and eriodictyol, on P-glycoprotein-mediated transport of the beta-blocker talinolol using the Caco-2 cell monolayer model and was used to determine the structure-function aspects of the interaction. The transport of talinolol across Caco-2 cells monolayers was determined in the absence and presence of distinct concentrations of the calcium-channel blocker verapamil (a known inhibitor of P-glycoprotein) and citrus compounds. A sigmoid dose-response model was used to fit the data and to estimate the IC50 values of the potential inhibitors. Results from this study show that PMFs significantly decreased talinolol transport from the basolateral to apical side, where tangeretin had the lowest IC50 of 3.2 micromol/L, followed by nobiletin, heptamethoxyflavone, and sinensetin with IC50 values of 3.5, 3.8, and 3.9 micromol/L, respectively. However, the efficacy of the compounds did not appear to be dependent on the number of methoxy groups. Other citrus compounds did not have any significant effect on the transport of talinolol. This study suggests that PMFs have a high potential in the interaction with P-gp-mediated talinolol transport in Caco-2 cells. Based on their relatively low concentrations (< or =3 microg/mL) in citrus, the clinical relevance of these interactions needs to be further elucidated in in vivo studies.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0021-8561
pubmed:author
pubmed:issnType
Print
pubmed:day
4
pubmed:volume
55
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2563-8
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Polymethoxylated flavones and other phenolic derivates from citrus in their inhibitory effects on P-glycoprotein-mediated transport of talinolol in Caco-2 cells.
pubmed:affiliation
Department of Pharmaceutics, College of Pharmacy, University of Florida, P.O. Box 100494, Gainesville, FL 32610, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't