ATP-Binding Cassette B1 Transports Seliciclib (R-Roscovitine), a Cyclin-Dependent Kinase Inhibitor

RAJNAI Z., Mehn D., BEERY E., Okyar A. , Jani M., Toth G. K. , ...Daha Fazla

DRUG METABOLISM AND DISPOSITION, cilt.38, ss.2000-2006, 2010 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 38 Konu: 11
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1124/dmd.110.032805
  • Sayfa Sayıları: ss.2000-2006


Seliciclib, a cyclin-dependent kinase inhibitor, is a promising candidate to treat a variety of cancers. Pharmacokinetic studies have shown high oral bioavailability but limited brain exposure to the drug. This study shows that seliciclib is a high-affinity substrate of ATP-binding cassette B1 (ABCB1) because it activates the ATPase activity of the transporter with an EC50 of 4.2 mu M and shows vectorial transport in MDCKII-MDR1 cells, yielding an efflux ratio of 8. This interaction may be behind the drug's limited penetration of the blood-brain barrier. ABCB1 overexpression, on the other hand, does not confer resistance to the drug in the models tested. These findings should be considered when treatment strategies using seliciclib are designed.