Linked Life Data

20592643

Source:http://linkedlifedata.com/resource/pubmed/id/20592643

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2010-7-28
pubmed:abstractText
As add-on therapy, phase III clinical trials of eslicarbazepine acetate (ESL) conducted in patients with refractory partial-onset seizures have shown good efficacy, safety, and tolerability, even in patients taking carbamazepine (CBZ) at baseline (approximately 60% of the enrolled patients). Thus, considering the pharmacological disadvantages of CBZ and the similar efficacy spectrum of CBZ and ESL, switching to ESL may be successful in many patients. As ESL is a prodrug almost instantaneously converted to S-licarbazepine (S-Lic; approximately 95%), an interest in therapeutic drug monitoring (TDM) of S-Lic is likely to develop in the future. This study investigated the plasma concentrations of S-Lic and R-licarbazepine (R-Lic) enantiomers in patients under CBZ long-term treatment to assess the potential interference of CBZ or its metabolites in the enantioselective TDM of ESL (using S-Lic concentrations). A chiral high-performance liquid chromatography assay with ultraviolet detection (HPLC-UV) previously developed and validated by our research group was used. Twenty-four patients admitted to the Coimbra University Hospital and supposedly receiving CBZ long-term treatment were identified. Blood samples were collected from patients and serum CBZ concentrations were measured by the usual TDM protocol. Aliquots of plasma from such patients were also submitted to a chiral HPLC-UV analysis. The bioanalytical data indicated that S-Lic and R-Lic were not present at detectable concentrations in plasma samples of the CBZ-treated patients. The chromatograms generated by the analysis of patient plasma samples, when compared with those obtained from blank plasma samples spiked with S-Lic and R-Lic, clearly showed the absence of interferences at the retention times of both Lic enantiomers. These data support the usefulness of the chiral HPLC-UV method used for the enantioselective TDM of ESL (using S-Lic) for programs in which switching from CBZ to ESL is implemented.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
1536-3694
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
32
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
512-6
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
Enantioselective assay for therapeutic drug monitoring of eslicarbazepine acetate: no interference with carbamazepine and its metabolites.
pubmed:affiliation
Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't