Phase II, double-blind, randomized trial of capecitabine plus enzastaurin versus capecitabine plus placebo in patients with metastatic or recurrent breast cancer after prior anthracycline and taxane therapy.

Publisher: Kluwer Academic Country of Publication: Netherlands NLM ID: 8111104 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1573-7217 (Electronic) Linking ISSN: 01676806 NLM ISO Abbreviation: Breast Cancer Res Treat Subsets: MEDLINE

Publication: Dordrecht : Kluwer Academic
Original Publication: The Hague ; Boston : M. Nijhoff, c1981-

Neoplasm Recurrence, Local*; Antineoplastic Combined Chemotherapy Protocols/*therapeutic use ; Breast Neoplasms/*drug therapy; Adult ; Aged ; Anthracyclines/administration & dosage ; Antineoplastic Combined Chemotherapy Protocols/adverse effects ; Antineoplastic Combined Chemotherapy Protocols/pharmacokinetics ; Argentina ; Australia ; Breast Neoplasms/mortality ; Breast Neoplasms/pathology ; Breast Neoplasms/secondary ; Canada ; Capecitabine ; Chemotherapy, Adjuvant ; Deoxycytidine/administration & dosage ; Deoxycytidine/analogs & derivatives ; Disease-Free Survival ; Double-Blind Method ; Early Termination of Clinical Trials ; Female ; Fluorouracil/administration & dosage ; Fluorouracil/analogs & derivatives ; Humans ; Indoles/administration & dosage ; Kaplan-Meier Estimate ; Mexico ; Middle Aged ; Neoadjuvant Therapy ; Placebo Effect ; Proportional Hazards Models ; Risk Assessment ; Risk Factors ; South Africa ; Taxoids/administration & dosage ; Time Factors ; Treatment Outcome

Capecitabine is frequently used in the treatment of recurrent/progressive metastatic breast cancer (MBC) after prior anthracycline and taxane therapy. With the intention of improving the efficacy of single agent capecitabine, we initiated a randomized, double-blind, placebo-controlled Phase II study of the novel serine/threonine kinase inhibitor enzastaurin in combination with capecitabine in a heavily pretreated patient population. Patients received capecitabine 1,250 mg/m(2) twice daily plus enzastaurin 500 mg/day, or capecitabine plus placebo. The capecitabine was administered for the first 14 days of each 21 day cycle. The primary outcome was progression-free survival (PFS) using the log-rank test (1-sided significance level of 0.20). Of 109 patients assessed for eligibility, 85 were enrolled, randomized, and treated (42 and 43 patients in each respective treatment group). The study was terminated early following a preplanned futility analysis. Median PFS (95% CI) was 2.8 (2.1-4.6) months with capecitabine plus enzastaurin versus 4.3 (2.9-6.2) months with capecitabine plus placebo (adjusted hazard ratio: 1.728 [1.00-2.97]; P = 0.048). Median overall survival (95% CI) was lower with capecitabine plus enzastaurin than with capecitabine plus placebo (9.9 [7.0-16.6] months vs 14.9 [9.9-19.3] months, P = 0.181). Grade 3/4 adverse events were more frequent with capecitabine plus enzastaurin (42.9% vs 32.6%). Given the lack of PFS benefit, capecitabine plus enzastaurin is unsuitable as therapy for patients with recurrent/progressive MBC after prior anthracycline and taxane therapy. This trial is registered on www.clinicaltrials.gov (identifier: NCT00437294).

ClinicalTrials.gov NCT00437294

0 (Anthracyclines)
0 (Indoles)
0 (Taxoids)
0W860991D6 (Deoxycytidine)
6804DJ8Z9U (Capecitabine)
U3P01618RT (Fluorouracil)
UC96G28EQF (enzastaurin)

Date Created: 20100904 Date Completed: 20110131 Latest Revision: 20151119

20240829

10.1007/s10549-010-1152-0

20814815