Published in:
01-02-2010 | Original Article
Plasma and cerebrospinal fluid pharmacokinetics of ABT-888 after oral administration in non-human primates
Authors:
Jodi A. Muscal, Patrick A. Thompson, Vincent L. Giranda, Brian D. Dayton, Joy Bauch, Terzah Horton, Leticia McGuffey, Jed G. Nuchtern, Robert C. Dauser, Brian W. Gibson, Susan M. Blaney, Jack M. Su
Published in:
Cancer Chemotherapy and Pharmacology
|
Issue 3/2010
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Abstract
Purpose
ABT-888 inhibits poly(ADP-ribose) polymerase (PARP) and may enhance the efficacy of chemotherapy and radiation in CNS tumors. We studied the plasma and cerebrospinal fluid (CSF) pharmacokinetics (PK) of ABT-888 in a non-human primate (NHP) model that is highly predictive of human CSF penetration.
Methods
ABT-888, 5 mg/kg, was administered orally to three NHPs. Serial blood and CSF samples were obtained. Plasma and CSF concentrations of ABT-888 were measured using LC/MS/MS, and the resulting concentration versus time data were evaluated using non-compartmental and compartmental PK methods.
Results
The CSF penetration of ABT-888 was 57 ± 7% (mean ± SD). The peak ABT-888 concentration in the plasma was 0.62 ± 0.18 μM. Plasma and CSF AUC0–∞ were 3.7 ± 1.7 and 2.1 ± 0.8 μM h. PARP inhibition in peripheral blood mononuclear cells was evident 2 h after ABT-888 administration.
Conclusion
The CSF penetration of ABT-888 after oral administration was 57%. Plasma and CSF concentrations were in the range that has been shown to inhibit PARP activity in vivo in humans.