Linked Life Data

12386136

Source:http://linkedlifedata.com/resource/pubmed/id/12386136

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
11
pubmed:dateCreated
2002-10-18
pubmed:abstractText
This study investigated the metabolic interaction between fibrates and statin hydroxy acids in human hepatocytes. Gemfibrozil (GFZ) modestly affected the formation of beta-oxidative products and CYP3A4-mediated oxidative metabolites of simvastatin hydroxy acid (SVA) but markedly inhibited the glucuronidation-mediated lactonization of SVA and the glucuronidation of a beta-oxidation product (IC(50) approximately 50 and 15 microM, respectively). In contrast, fenofibrate had a minimal effect on all the metabolic pathways of SVA. GFZ also significantly inhibited (IC(50) approximately 50-60 microM) the oxidation of cerivastatin (CVA) and rosuvastatin (RVA), but not of atorvastatin (AVA), while effectively decreasing (IC(50) approximately 30 to 60 microM) the lactonization of all three statins. As was observed previously with other statin hydroxy acids, RVA underwent significant glucuronidation to form an acyl glucuronide conjugate and lactonization to form RVA lactone in human liver microsomes and by UGT 1A1 and 1A3. While GFZ is not an inhibitor of CYP3A4, it is a competitive inhibitor (K(i) = 87 microM) of CYP2C8, a major catalyzing enzyme for CVA oxidation. These results suggest that 1) the pharmacokinetic interaction observed between GFZ and statins was not likely mediated by the inhibitory effect of GFZ on the beta-oxidation, but rather by its effect primarily on the glucuronidation and non-CYP3A-mediated oxidation of statin hydroxy acids, and 2) there is a potential difference between fibrates in their ability to affect the pharmacokinetics of statins, and among statins in their susceptibility to metabolic interactions with GFZ in humans.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
http://linkedlifedata.com/resource/pubmed/chemical/Aryl Hydrocarbon Hydroxylases, http://linkedlifedata.com/resource/pubmed/chemical/CYP2C8 protein, human, http://linkedlifedata.com/resource/pubmed/chemical/Fenofibrate, http://linkedlifedata.com/resource/pubmed/chemical/Fluorobenzenes, http://linkedlifedata.com/resource/pubmed/chemical/Gemfibrozil, http://linkedlifedata.com/resource/pubmed/chemical/Glucuronosyltransferase, http://linkedlifedata.com/resource/pubmed/chemical/Heptanoic Acids, http://linkedlifedata.com/resource/pubmed/chemical/Hydroxymethylglutaryl-CoA..., http://linkedlifedata.com/resource/pubmed/chemical/Hypolipidemic Agents, http://linkedlifedata.com/resource/pubmed/chemical/Pyrimidines, http://linkedlifedata.com/resource/pubmed/chemical/Pyrroles, http://linkedlifedata.com/resource/pubmed/chemical/Simvastatin, http://linkedlifedata.com/resource/pubmed/chemical/Sulfonamides, http://linkedlifedata.com/resource/pubmed/chemical/atorvastatin, http://linkedlifedata.com/resource/pubmed/chemical/rosuvastatin
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0090-9556
pubmed:author
pubmed:issnType
Print
pubmed:volume
30
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1280-7
pubmed:dateRevised
2010-11-18
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
Effects of fibrates on metabolism of statins in human hepatocytes.
pubmed:affiliation
Department of Drug Metabolism, Merck Research Laboratories, West Point, Pennsylvania 19486, USA. thomayant_prueksaritanont@merck.com
pubmed:publicationType
Journal Article, In Vitro