当前位置： SCI文献检索 > CANCER CHEMOTHERAPY AND PHARMACOLOGY期刊下所有文献 > Preclinical pharmacokinetics and in vitro metabolism of brivanib (BMS-540215), a potent VEGFR2 inhibitor and its alanine ester prodrug brivanib alaninate.

Preclinical pharmacokinetics and in vitro metabolism of brivanib (BMS-540215), a potent VEGFR2 inhibitor and its alanine ester prodrug brivanib alaninate.

Abstract：

PURPOSE:Brivanib alaninate is a prodrug of brivanib (BMS-540215), a potent oral VEGFR-2 inhibitor and is currently in development for the treatment of hepatocellular and colon carcinomas. In vitro and in vivo studies were conducted to characterize the preclinical pharmacokinetics and disposition of brivanib and brivanib alaninate, and antitumor efficacy in mice bearing human xenografts. METHODS:In vitro studies were conducted in liver and intestinal fractions, plasma and Caco-2 cells to assess the metabolic stability. Pharmacokinetics of brivanib were determined in preclinical species after administration of single intravenous or oral doses of both brivanib and brivanib alaninate. The antitumor efficacy was assessed at equimolar doses in nude mice bearing human tumor xenografts. Human efficacious dose was predicted based on projected human pharmacokinetic parameters and exposure at efficacious doses in the mouse efficacy models. RESULTS:In vitro and in vivo studies indicated that brivanib alaninate was efficiently converted to brivanib. Brivanib showed good brain penetration in rats consistent with its high intrinsic permeability and lack of active efflux in Caco-2 cells. The oral bioavailability of brivanib varied among species (22-88%) and showed dissolution rate-limited absorption even when combined with organic co-solvents. Administration of brivanib as brivanib alaninate allowed completely aqueous vehicles, and an improvement in the oral bioavailability (55-97%) was observed. The clearance of brivanib in humans is anticipated to be low to intermediate (hepatic extraction ratio < 0.7), while its volume of distribution is expected to be high. The minimum efficacious dose of brivanib alaninate was determined to be 60 mg/kg per day. CONCLUSIONS:Brivanib alaninate is rapidly and efficiently converted to the parent, brivanib, as demonstrated both in vitro and in vivo and offers an excellent mode to deliver brivanib orally.

journal_name

Cancer Chemother Pharmacol

journal_title

Cancer chemotherapy and pharmacology

authors

Marathe PH,Kamath AV,Zhang Y,D'Arienzo C,Bhide R,Fargnoli J

doi

10.1007/s00280-009-1002-0

subject

Has Abstract

pub_date

2009-12-01 00:00:00

pages

55-66

issue

eissn

0344-5704

issn

1432-0843

journal_volume

pub_type

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Preclinical pharmacokinetics and in vitro metabolism of brivanib (BMS-540215), a potent VEGFR2 inhibitor and its alanine ester prodrug brivanib alaninate.