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Crossover to Duvelisib Feasible in Patients With CLL

Brandon Scalea
Published: Tuesday, Jan 08, 2019

Matthew S. Davids, MD

Matthew S. Davids, MD, MMSc
Duvelisib (Copiktra) monotherapy achieved robust and durable responses in patients with relapsed/refractory chronic lymphocytic leukemia (CLL), according to updated data presented at the 2018 ASH Annual Meeting.

at the 2018 ASH Annual Meeting, Matthew S. Davids, MD, MMSc, the Associate Director of the Chronic Lymphocytic Leukemia Center at Dana-Farber Cancer Institute and an assistant professor of medicine at Harvard Medical School, discussed the clinical implications of this trial in patients with CLL.

OncLive: Please provide some background to the DUO trial.

Davids: The DUO trial looked at the use of duvelisib in patients with CLL. Duvelisib is a delta-gama PI3K inhibitor that is being compared in this study to ofatumumab, a CD20-targeted monoclonal antibody. In the initial results, there was a clear advantage to duvelisib over ofatumumab. These data led to the FDA approval of the drug in September 2018.

What were the results presented at the 2018 ASH Annual Meeting?

The design of the DUO trial included a crossover portion, so patients treated with ofatumumab who experienced disease progression could then move on to duvelisib. At this meeting, I presented the updated data of the 90 patients who crossed over to duvelisib monotherapy. The patients who received duvelisib tended to do well in general. We saw responses in about three-quarters of the patients. The PFS rates were comparable to what we saw in the earlier parts of the study. There did not appear to be any detriment to being treated with ofatumumab first in terms of duvelisib response. The drug was generally well tolerated for most patients, although there are some AEs that need to be monitored closely, such as diarrhea and colitis.
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