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Cancer Discov. 2011 Dec;1(7):598-607. doi: 10.1158/2159-8290.CD-11-0214. Epub 2011 Nov 9.

Combination epigenetic therapy has efficacy in patients with refractory advanced non-small cell lung cancer.

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1
Department of Oncology, Johns Hopkins University, Baltimore, Maryland 21231, USA.

Abstract

Epigenetic alterations are strongly associated with the development of cancer. We conducted a phase I/II trial of combined epigenetic therapy with azacitidine and entinostat, inhibitors of DNA methylation and histone deacetylation, respectively, in extensively pretreated patients with recurrent metastatic non-small cell lung cancer. This therapy is well tolerated, and objective responses were observed, including a complete response and a partial response in a patient who remains alive and without disease progression approximately 2 years after completing protocol therapy. Median survival in the entire cohort was 6.4 months (95% CI 3.8-9.2), comparing favorably with existing therapeutic options. Demethylation of a set of 4 epigenetically silenced genes known to be associated with lung cancer was detectable in serial blood samples in these patients and was associated with improved progression-free (P = 0.034) and overall survival (P = 0.035). Four of 19 patients had major objective responses to subsequent anticancer therapies given immediately after epigenetic therapy.

SIGNIFICANCE:

This study demonstrates that combined epigenetic therapy with low-dose azacitidine and entinostat results in objective, durable responses in patients with solid tumors and defines a blood-based biomarker that correlates with clinical benefit.

PMID:
22586682
PMCID:
PMC3353724
DOI:
10.1158/2159-8290.CD-11-0214
[Indexed for MEDLINE]
Free PMC Article

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