• J Oncol Pharm Pract · Feb 2016

    Review

    A review of a novel, Bruton's tyrosine kinase inhibitor, ibrutinib.

    • Chung-Shien Lee, Mohammad A Rattu, and Sara S Kim.
    • Department of Pharmacy, The Mount Sinai Hospital, New York, NY, USA leec3@stjohns.edu.
    • J Oncol Pharm Pract. 2016 Feb 1; 22 (1): 92-104.

    AbstractIbrutinib, a Bruton's kinase inhibitor, was granted an accelerated approval by the US Food and Drug Administration in November, 2013, for the treatment of relapsed or refractory mantle cell lymphoma and subsequently for the treatment of relapsed refractory chronic lymphocytic leukemia in February, 2014. In the pivotal phase 2 study of 111 patients with relapsed or refractory mantle cell lymphoma, the overall response rate in patients who received ibrutinib 560 mg daily was 68%. The median progression-free survival was 13.9 months, and the overall survival was 58% at 18 months. In a recently published phase 3 trial (RESONATE) that compared ibrutinib and ofatumumab for the treatment of relapsed and refractory chronic lymphocytic leukemia or small lymphocytic lymphoma, ibrutinib at the daily dosage of 420 mg demonstrated a significantly higher overall response rate (43% in ibrutinib vs. 4% in ofatumumab) and a significantly improved overall survival at 12 months (90% ibrutinib vs. 81% ofatumumab). Similar clinical benefits were shown regardless of del (17 p). Ibrutinib was well tolerated, and dose-limiting toxicity was not observed. Ibrutinib has shown durable remission, improved progression-free survival and overall survival, and favorable safety profile in indolent B-cell lymphoid malignancies. Ibrutinib, as a monotherapy, is an effective treatment modality as a salvage therapy for treatment of mantle cell lymphoma and chronic lymphocytic leukemia / small lymphocytic lymphoma, particularly in older patients (age ≥70 years) who are not a candidate for intensive chemotherapy and/or those with del (17 p). In patients with chronic lymphocytic leukemia and del (17 p), the current practice guideline recommends ibrutinib as an upfront treatment option. Current on-going trials will further define its role as upfront therapy and/or as a combination therapy in indolent B-cell lymphoid malignancies.© The Author(s) 2014.

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