Impact of P-glycoprotein and breast cancer resistance protein on the brain distribution of antiepileptic drugs in knockout mouse models
| Autor: | Atsushi Yonezawa, Haruka Nakanishi, Kazuo Matsubara, Ikuko Yano |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Male
Phenytoin ATP Binding Cassette Transporter Subfamily B Abcg2 Tiagabine Lamotrigine Pharmacology Blood–brain barrier Mice Pharmacokinetics medicine ATP Binding Cassette Transporter Subfamily G Member 2 Animals Abcb1 P-glycoprotein Mice Knockout biology business.industry Brain biology.protein ATP-Binding Cassette Transporters Anticonvulsants Phenobarbital Levetiracetam business Antiepileptic drug medicine.drug Knockout mice |
| Zdroj: | European journal of pharmacology. 710(1-3):20-28 |
| ISSN: | 0014-2999 |
| Popis: | Refractory epilepsy is reportedly associated with an overexpression of ATP-binding cassette transporters such as P-glycoprotein (Pgp) and breast cancer resistance protein (Bcrp). In this study, we examined the contribution of Pgp and Bcrp to the brain distribution of 12 antiepileptic drugs (AEDs) in Mdr1a/1b(-/-) and Mdr1a/1b(-/-)/Bcrp(-/-) mice within a therapeutic concentration range. The blood concentrations were sequentially determined, and the brain concentrations were measured at 60 min after intravenous administration. The plasma concentration profiles for each AED in the Mdr1a/1b(-/-) mice were equivalent to those in the wild-type mice. In contrast, the plasma concentration profiles of phenytoin, lamotrigine, topiramate, tiagabine, and levetiracetam in the Mdr1a/1b(-/-)/Bcrp(-/-) mice were significantly lower than the corresponding ones in the wild-type mice. The brain-to-plasma concentration ratio (Kpbrain) values of phenytoin, topiramate, and tiagabine in the Mdr1a/1b(-/-) mice were significantly higher than the corresponding ones in the wild-type mice. In contrast, the Kpbrain values of phenobarbital, clobazam, zonisamide, gabapentin, tiagabine, and levetiracetam in the Mdr1a/1b(-/-)/Bcrp(-/-) mice were significantly higher than the corresponding ones in Mdr1a/1b(-/-) mice. The Kpbrain values of the 12 AEDs in the Mdr1a/1b(-/-)/Bcrp(-/-) mice, but not wild-type mice, significantly correlated with the corresponding molecular weight values. These findings suggest that both Pgp and Bcrp restrict brain access for several AEDs. Taken together, information on the contribution of each transporter may be useful in the development of strategic treatments of refractory epilepsy. |
| Databáze: | OpenAIRE |
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