Linked Life Data

19223649

Source:http://linkedlifedata.com/resource/pubmed/id/19223649

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2009-4-27
pubmed:abstractText
LB80380, a dipivoxil ester prodrug of LB80331 (metabolite, LB80317), is a novel antiviral agent for chronic hepatitis B (CHB). The pharmacokinetics of LB80331/LB80317 were evaluated in two clinical studies and a study with mice. The clinical studies were dose-escalating pharmacokinetic studies with six healthy subjects per single-dose group and six CHB patients per repeated-dose group. The mouse study was designed to measure the amounts of the phosphorylated portions of LB80331 and LB80317 in the liver. In healthy subjects receiving a single dose of LB80380, the plasma level of LB80331 increased as the dose increased. Although a high-fat diet delayed the time to the maximum concentration in plasma (T(max)) of LB80331, the area under the concentration-time curve from time zero to infinity was similar between the subjects in the fasted group and those in the group who consumed a high-fat diet. In CHB patients, the mean T(max) of LB80331 was 1.0 to 2.0 h postdosing at steady state. The steady-state plasma concentration of LB80331 declined in a monoexponential manner, and the apparent elimination half-life was 2.5 to 3.3 h. The steady-state plasma concentration of LB80317 was maximum at 3 to 8 h postdoing and declined in a monoexponential manner; the apparent elimination half-life was 45 to 62 h at the 30- to 240-mg doses, while LB80317 was measurable in plasma only at higher doses of 120 and 240 mg after the administration of the first dose of LB80380. Forty percent of the amount of LB80331/LB80317 in the mouse liver was detected as the phosphorylated form. In conclusion, LB80380 is rapidly absorbed and converted to LB80331. LB80317 has a long half-life at steady-state, supporting the use of a once-daily dosing regimen. The ingestion of a high-fat diet delays the rate of absorption of LB80380 without affecting the extent of absorption.
pubmed:commentsCorrections
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
1098-6596
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
53
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1779-85
pubmed:dateRevised
2010-9-22
pubmed:meshHeading
pubmed-meshheading:19223649-Administration, Oral, pubmed-meshheading:19223649-Adolescent, pubmed-meshheading:19223649-Adult, pubmed-meshheading:19223649-Animals, pubmed-meshheading:19223649-Clinical Trials, Phase I as Topic, pubmed-meshheading:19223649-Clinical Trials, Phase II as Topic, pubmed-meshheading:19223649-Dose-Response Relationship, Drug, pubmed-meshheading:19223649-Double-Blind Method, pubmed-meshheading:19223649-Female, pubmed-meshheading:19223649-Hepacivirus, pubmed-meshheading:19223649-Hepatitis B, Chronic, pubmed-meshheading:19223649-Humans, pubmed-meshheading:19223649-Liver, pubmed-meshheading:19223649-Male, pubmed-meshheading:19223649-Mice, pubmed-meshheading:19223649-Middle Aged, pubmed-meshheading:19223649-Nucleotides, pubmed-meshheading:19223649-Prodrugs, pubmed-meshheading:19223649-Randomized Controlled Trials as Topic, pubmed-meshheading:19223649-Treatment Outcome, pubmed-meshheading:19223649-Young Adult
pubmed:year
2009
pubmed:articleTitle
Pharmacokinetics of LB80331 and LB80317 following oral administration of LB80380, a new antiviral agent for chronic hepatitis B (CHB), in healthy adult subjects, CHB patients, and mice.
pubmed:affiliation
Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Pokfulam Road, Hong Kong. mfyuen@hkucc.hku.hk
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't