This study evaluates the hypothesis that the extent of interaction between an inhibitor (fluconazole) and an enzyme (CYP2C19) is linearly related to the plasma concentration of the inhibitor. Ten healthy subjects will be admitted to the CRC on four separate occasions. The first visit to CRC will establish the subject's baseline level of metabolic activity of CYP2C19 - the enzyme responsible for the metabolism of (S)-mephenytoin. Subjects then will be brought to steady-state concentrations of fluconazole using 20, 60 or 200 mg/day and the enzyme activity will again be measusred by giving the same test dose of 100 mg (S)-mephenytoin. In vivo inhibition constants Ki,IV will be calculated by measuring the 4'hydroxylation of (S)-mephenytoin.

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
General Clinical Research Centers Program (M01)
Project #
3M01RR000037-39S1
Application #
6113100
Study Section
Project Start
1998-12-01
Project End
1999-11-30
Budget Start
1998-10-01
Budget End
1999-09-30
Support Year
39
Fiscal Year
1999
Total Cost
Indirect Cost
Name
University of Washington
Department
Type
DUNS #
135646524
City
Seattle
State
WA
Country
United States
Zip Code
98195
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