PURPOSE: The aim of this study was to determine (i) the maximum tolerated dose (MTD) of liposomal doxorubicin (L-DOX) and paclitaxel (DP), (ii) the MTD of DP plus valspodar (DPV) and (iii) pharmacokinetic (PK) interactions of valspodar with L-DOX and paclitaxel. METHODS: Twenty-three patients with metastatic cancers received DP, followed 4 weeks later by DPV. Dose levels of DP were (mg/m2 for L-DOX/paclitaxel): 30/135 (n = 7), 30/150 (n = 4), 35/150 (n = 8) and 40/150 (n = 4). Dose levels of DPV were 15/70 (n = 10) and 15/60 (n = 10). Serial, paired PK studies were performed. RESULTS: The MTD of DP was 40/150. For DPV at 15/70, five of 10 patients experienced grade 4 neutropenia. In the next cohort, a reduced dose of 15/60 was well tolerated. Valspodar produced reversible grade 3 ataxia in seven patients, requiring dose reduction from 5 to 4 mg/kg. Paired PK studies indicated no interaction between L-DOX and valspodar, and a 49% increase in the median half-life of paclitaxel. Two partial and one minor remissions were noted. CONCLUSIONS: The use of valspodar necessitated dose reductions of DP, with neutropenia being dose limiting. Valspodar PK interactions were observed with paclitaxel but not L-DOX.
PURPOSE: The aim of this study was to determine (i) the maximum tolerated dose (MTD) of liposomal doxorubicin (L-DOX) and paclitaxel (DP), (ii) the MTD of DP plus valspodar (DPV) and (iii) pharmacokinetic (PK) interactions of valspodar with L-DOX and paclitaxel. METHODS: Twenty-three patients with metastatic cancers received DP, followed 4 weeks later by DPV. Dose levels of DP were (mg/m2 for L-DOX/paclitaxel): 30/135 (n = 7), 30/150 (n = 4), 35/150 (n = 8) and 40/150 (n = 4). Dose levels of DPV were 15/70 (n = 10) and 15/60 (n = 10). Serial, paired PK studies were performed. RESULTS: The MTD of DP was 40/150. For DPV at 15/70, five of 10 patients experienced grade 4 neutropenia. In the next cohort, a reduced dose of 15/60 was well tolerated. Valspodar produced reversible grade 3 ataxia in seven patients, requiring dose reduction from 5 to 4 mg/kg. Paired PK studies indicated no interaction between L-DOX and valspodar, and a 49% increase in the median half-life of paclitaxel. Two partial and one minor remissions were noted. CONCLUSIONS: The use of valspodar necessitated dose reductions of DP, with neutropenia being dose limiting. Valspodar PK interactions were observed with paclitaxel but not L-DOX.
Authors: Silvana Papagerakis; Giuseppe Pannone; Li Zheng; Imad About; Nawar Taqi; Nghia P T Nguyen; Margarite Matossian; Blake McAlpin; Angela Santoro; Jonathan McHugh; Mark E Prince; Petros Papagerakis Journal: Exp Cell Res Date: 2014-05-05 Impact factor: 3.905
Authors: Catherine A Burkhart; Fujiko Watt; Jayne Murray; Marina Pajic; Anatoly Prokvolit; Chengyuan Xue; Claudia Flemming; Janice Smith; Andrei Purmal; Nadezhda Isachenko; Pavel G Komarov; Katerina V Gurova; Alan C Sartorelli; Glenn M Marshall; Murray D Norris; Andrei V Gudkov; Michelle Haber Journal: Cancer Res Date: 2009-08-04 Impact factor: 12.701
Authors: Kevin G Chen; George E Duran; Mark J Mogul; Yan C Wang; Kevin L Ross; Jean-Pierre Jaffrézou; Lyn M Huff; Kory R Johnson; Tito Fojo; Norman J Lacayo; Branimir I Sikic Journal: Cancer Drug Resist Date: 2020-11-03