Lenalidomide monotherapy in chemotherapy-naive, castration-resistant prostate cancer patients: final results of a phase II study.

Abstract:

BACKGROUND:We investigated the activity of lenalidomide, which has antiangiogenic, antineoplastic, and immunomodulatory properties, in chemotherapy-naive, castration-resistant prostate cancer (CRPC) patients. PATIENTS:Patients received 25 mg/d lenalidomide for 21 days in 28-day cycles, until disease progression or unacceptable toxicity developed. Endpoints included overall response rate and clinical benefit (overall response + stable disease), toxicity, time to radiographic progression, and time to prostate-specific antigen (PSA) progression, overall survival, and quality of life. RESULTS:Thirty-two patients were enrolled in the study; of these, 77% (n = 25) had Gleason scores ≥ 7. The median age was 74 years (58-89 y), the median PSA level was 66 ng/mL (2-919 ng/mL), and 5 of 32 patients (17%) had liver or lung involvement. The median number of lenalidomide cycles was 3 (1-16 cycles). Stable disease was seen in 20 patients, for a clinical benefit rate of 63%. The median time to radiographic progression was 4 months (2-16 mo); the median overall survival was 20 months. Of 27 PSA-evaluable patients, 13 (48%) had a decline in PSA level; 3 (11%) had > 50% PSA decrease; the median time to PSA progression was 3 months (2-9 mo). Grade 3/4 hematologic toxicities were the most common adverse events without adverse impact on quality of life. Serious adverse events occurred in 14 patients (44%), including 1 patient (3%) with a rash definitely related to lenalidomide. CONCLUSION:Lenalidomide monotherapy demonstrates modest activity in chemotherapy-naive CRPC.

journal_name

Clin Genitourin Cancer

authors

Nabhan C,Patel A,Villines D,Tolzien K,Kelby SK,Lestingi TM

doi

10.1016/j.clgc.2013.09.001

subject

Has Abstract

pub_date

2014-02-01 00:00:00

pages

27-32

issue

1

eissn

1558-7673

issn

1938-0682

pii

S1558-7673(13)00212-7

journal_volume

12

pub_type

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