Chang, Minsun Lee, Sung-Hak Kim, Ho Jun Koh, Jong-Sung Kim, Aeri 2024-01-20T15:00:38Z 2024-01-20T15:00:38Z 2021-08-31 2012-05-01 0960-894X https://pubs.kist.re.kr/handle/201004/129271 Metabolism of LB42908, a novel farnesyl transferase inhibitor, was investigated for preclinical development. In vitro hepatic metabolism of LB42908 gave rise to at least 9 metabolites via phase I biotransformation pathways, which were characterized by HPLC-UV, LC-MS, and LC-MS/MS analyses. N-Dealkylation was shown to be a major phase I metabolic pathway. Species-specific in vitro metabolism of LB42908 was studied in liver fractions of rat, dog, monkey, and human. Order of metabolic stability is human approximate to dog > rat approximate to monkey in both S9 and microsomal fractions. Tissue-specific metabolism of LB42908 in various tissue homogenates of rats demonstrated that the liver was the major organ responsible for phase I metabolism of LB42908. The results from both qualitative and quantitative metabolism studies such as metabolic profiling and metabolic clearance indicated that dog would be the animal model of choice for preclinical toxicology studies. In addition, LB42908 was a potent CYP3A4 inhibitor in human liver microsomes and induced the activities of several CYP isozymes, implying that it has the potential for drug-drug interactions. Repeated dosing of LB42908 in rats did not significantly affect its own metabolism, indicating that long-term administration of LB42908 would not alter its pharmacokinetic profiles. (C) 2012 Elsevier Ltd. All rights reserved. English Pergamon Press Ltd. DRUG-METABOLISM HUMAN LIVER IN-VIVO RAS FARNESYLTRANSFERASE PHASE-II PREDICTION PROTEIN TUMOR EXPRESSION CLEARANCE Preclinical metabolism of LB42908, a novel farnesyl transferase inhibitor, and its effects on the cytochrome P450 isozyme activities Article 10.1016/j.bmcl.2012.03.070 1 Bioorganic & Medicinal Chemistry Letters, v.22, no.9, pp.3067 - 3071 Bioorganic & Medicinal Chemistry Letters 22 9 3067 3071 scie scopus 000302964300006 2-s2.0-84859831735 Chemistry, Medicinal Chemistry, Organic Pharmacology & Pharmacy Chemistry Article DRUG-METABOLISM HUMAN LIVER IN-VIVO RAS FARNESYLTRANSFERASE PHASE-II PREDICTION PROTEIN TUMOR EXPRESSION CLEARANCE Farnesyl transferase inhibitor Preclinical hepatic metabolism Drug-drug interaction Cytochrome P450