A phase 1 dose-escalation study of irinotecan in combination with 17-allylamino-17-demethoxygeldanamycin in patients with solid tumors

Tse, A. N., Klimstra, D. S., Gonen, M., Shah, M., Sheikh, T., Sikorski, R., Carvajal, R., Mui, J., Tipian, C., O'Reilly, E., Chung, K., Maki, R., Lefkowitz, R., Brown, K., Manova-Todorova, K., Wu, N., Egorin, M. J., Kelsen, D., Schwartz, G. K. (October 2008) A phase 1 dose-escalation study of irinotecan in combination with 17-allylamino-17-demethoxygeldanamycin in patients with solid tumors. Clin Cancer Res, 14 (20). pp. 6704-11. ISSN 1078-0432 (Print)1078-0432 (Linking)

URL: https://www.ncbi.nlm.nih.gov/pubmed/18927314
DOI: 10.1158/1078-0432.CCR-08-1006


PURPOSE: Both heat shock protein 90 (Hsp90) and checkpoint kinase 1 (Chk1) have emerged as novel therapeutic targets. We conducted a phase I study of irinotecan and the Hsp90 inhibitor 17AAG, which can also down-regulate Chk1, in patients with solid tumors. EXPERIMENTAL DESIGN: During the dose escalation phase, patients received i.v. irinotecan followed by 17AAG once weekly for 2 weeks in a 21-day cycle. At the maximum tolerated dose (MTD), additional patients were enrolled to undergo pre- and post-17AAG tumor biopsies for pharmacodynamic evaluation. The pharmacokinetics of irinotecan, 17AAG, and their metabolites were characterized. Tumor p53 status as determined by immunohistochemistry was correlated with antitumor activity. RESULTS: Twenty-seven patients with a variety of solid tumors were enrolled. Four patients developed dose-limiting toxicity at dose level 4 (100 mg/m(2) irinotecan and 375 mg/m(2) 17AAG) including nausea, vomiting, diarrhea, and pulmonary embolism. The pharmacokinetics of 17AAG and its metabolite were not significantly affected by the coadministration of irinotecan, and vice versa. There was no partial response, although tumor shrinkage was observed in six patients. Five of 10 patients with p53-mutant tumor had stable disease as the best response compared with 2 of 6 patients with p53-wildtype tumor (P = 0.63). Evidence for Hsp90 inhibition by 17AAG, resulting in phospho-Chk1 loss, abrogation of the G(2)-M cell cycle checkpoint, and cell death could be shown in tumor biopsy samples obtained at the MTD. CONCLUSIONS: The combination of irinotecan and 17AAG can be given to patients with acceptable toxicity. The recommended phase II dose of the combination is 100 mg/m(2) irinotecan and 300 mg/m(2) 17AAG.

Item Type: Paper
Uncontrolled Keywords: Adult Aged Antineoplastic Combined Chemotherapy Protocols/*therapeutic use Benzoquinones/administration & dosage Camptothecin/administration & dosage/analogs & derivatives Dose-Response Relationship, Drug Drug Therapy, Combination Female HSP90 Heat-Shock Proteins/antagonists & inhibitors Humans Lactams, Macrocyclic/administration & dosage Male Maximum Tolerated Dose Middle Aged Neoplasms/blood/*drug therapy Treatment Outcome
Subjects: diseases & disorders > cancer
diseases & disorders > cancer > drugs and therapies
diseases & disorders > cancer > prognosis
CSHL Authors:
Communities: CSHL labs > Maki lab
Depositing User: Matt Covey
Date: 15 October 2008
Date Deposited: 26 Oct 2016 14:55
Last Modified: 26 Oct 2016 14:55
PMCID: PMC3996559
Related URLs:
URI: https://repository.cshl.edu/id/eprint/33692

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