Emergent BioSolutions initiates TRU-016 Phase Ib/II study for chronic lymphocytic leukemia

Emergent BioSolutions Inc. (NYSE: EBS) today announced the initiation of a Phase Ib/II study (16201) of TRU-016 for chronic lymphocytic leukemia (CLL). TRU-016 is a CD37-directed Small Modular ImmunoPharmaceutical (SMIP™) protein therapeutic in development for the treatment of B-cell malignancies. TRU-016 is being developed in collaboration with Abbott.

“The dose escalation study in CLL continues to demonstrate that TRU-016 is well tolerated and clinically active and we look forward to Phase I combination data from this study, as well as the planned Phase I combination study for follicular Non-Hodgkin's Lymphoma.”

The open-label, multi-center, active-controlled study is expected to enroll up to 114 bendamustine-naïve patients with a confirmed diagnosis of relapsed CLL and who have failed up to three previous treatments. The Phase Ib portion of the study will determine a safe and tolerable dose of TRU-016 in combination with bendamustine in up to 14 patients with relapsed CLL. The primary endpoint for the Phase Ib portion is the incidence of dose-limiting toxicities.

The Phase II portion of the study will evaluate the safety and efficacy of TRU-016 in combination with bendamustine compared with standalone bendamustine treatment in a total of 100 randomized patients. The primary endpoint for the Phase II portion of the study is an overall response rate as defined by 2008 International Workshop on Chronic Lymphocytic Leukemia (IWCLL) criteria. Secondary endpoints include complete and partial response rates as defined by the 1996 National Cancer Institute (NCI) criteria, progression-free survival, duration of response, and improvement in quality of life and disease symptoms.

The pharmacokinetics and pharmacodynamics of TRU-016 will be studied in both phases of the study.

"Given the strong TRU-016 preclinical combination data, and the positive clinical results from the single agent dose escalation study, we believe human clinical evaluation of TRU-016 in combination with bendamustine could yield meaningful results," said Dr. W. James Jackson, chief scientific officer at Emergent BioSolutions. "The dose escalation study in CLL continues to demonstrate that TRU-016 is well tolerated and clinically active and we look forward to Phase I combination data from this study, as well as the planned Phase I combination study for follicular Non-Hodgkin's Lymphoma."

Additional information about this Phase Ib/II clinical study can be found on www.clinicaltrials.gov (protocol 16201).