title: Effect of the ATP-binding cassette drug transporters ABCB1, ABCG2, and ABCC2 on erlotinib hydrochloride (Tarceva) disposition in in vitro and in vivo pharmacokinetic studies employing Bcrp1-/-/Mdr1a/1b-/- (triple-knockout) and wild-type mice.
abstract: We tested whether erlotinib hydrochloride (Tarceva, OSI-774), an orally active epidermal growth factor receptor tyrosine kinase inhibitor, is a substrate for the ATP-binding cassette drug transporters P-glycoprotein (P-gp; MDR1, ABCB1), breast cancer resistance protein (BCRP; ABCG2), and multidrug resistance protein 2 (MRP2; ABCC2) in vitro and whether P-gp and BCRP affect the oral pharmacokinetics of erlotinib hydrochloride in vivo. In vitro cell survival, drug transport, accumulation, and efflux of erlotinib were done using Madin-Darby canine kidney II [MDCKII; wild-type (WT), MDR1, Bcrp1, and MRP2] and LLCPK (WT and MDR1) cells and monolayers as well as the IGROV1 and the derived human BCRP-overexpressing T8 cell lines. In vivo, the pharmacokinetics of erlotinib after p.o. and i.p. administration was studied in Bcrp1/Mdr1a/1b(-/-) (triple-knockout) and WT mice. In vitro, erlotinib was actively transported by P-gp and BCRP/Bcrp1. No active transport of erlotinib by MRP2 was observed. In vivo, systemic exposure (P = 0.01) as well as bioavailability of erlotinib after oral administration (5 mg/kg) were statistically significantly increased in Bcrp1/Mdr1a/1b(-/-) knockout mice (60.4%) compared with WT mice (40.0%; P = 0.02).
  
  
  CONCLUSIONS
  Erlotinib is transported efficiently by P-gp and BCRP/Bcrp1 in vitro. In vivo, absence of P-gp and Bcrp1 significantly affected the oral bioavailability of erlotinib. Possible clinical consequences for drug-drug and drug-herb interactions in patients in the gut between P-gp/BCRP-inhibiting substrates and oral erlotinib need to be addressed.
authors: Department of Experimental Therapy and Medical Oncology, The Netherlands Cancer Institute, Plesmanlaan 121, Amsterdam, The Netherlands.
authors: Serena
authors: S
authors: Marchetti
authors: Nienke A
authors: NA
authors: de Vries
authors: Tessa
authors: T
authors: Buckle
authors: Maria J
authors: MJ
authors: Bolijn
authors: Maria A J
authors: MA
authors: van Eijndhoven
authors: Jos H
authors: JH
authors: Beijnen
authors: Roberto
authors: R
authors: Mazzanti
authors: Olaf
authors: O
authors: van Tellingen
authors: Jan H M
authors: JH
authors: Schellens
mesh_terms: D018435:ATP Binding Cassette Transporter, Subfamily B / Q000235:genetics / Q000502:physiology*; D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D000070997:ATP Binding Cassette Transporter, Subfamily G, Member 2; D018528:ATP-Binding Cassette Transporters / Q000235:genetics / Q000502:physiology*; D000818:Animals; D000069347:Erlotinib Hydrochloride; D005260:Female; D051379:Mice; D018345:Mice, Knockout; D000089762:Multidrug Resistance-Associated Protein 2; D027425:ATP-Binding Cassette, Sub-Family C Proteins / Q000502:physiology*; D047428:Protein Kinase Inhibitors / Q000493:pharmacokinetics; D011799:Quinazolines / Q000493:pharmacokinetics*; D000097202:ATP-Binding Cassette Sub-Family B Member 4
chemical_list: D018435:ATP Binding Cassette Transporter, Subfamily B; D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D000070997:ATP Binding Cassette Transporter, Subfamily G, Member 2; D018528:ATP-Binding Cassette Transporters; D000069347:Erlotinib Hydrochloride; D000089762:Multidrug Resistance-Associated Protein 2; D027425:ATP-Binding Cassette, Sub-Family C Proteins; D047428:Protein Kinase Inhibitors; D011799:Quinazolines; D000097202:ATP-Binding Cassette Sub-Family B Member 4; C000715087:ABCC2 protein, human; C501412:Abcg2 protein, mouse; C095122:multidrug resistance protein 3; C507084:Abcb1b protein, mouse