MorphoSys AG (FSE: MOR; Prime Standard Segment, TecDAX, OTC: MPSYY) and US-based Xencor, Inc. today announced completion of the phase 1/2a clinical trial evaluating MOR208 (formerly XmAb(®)5574) in patients with relapsed or refractory chronic lymphocytic leukemia (CLL/SLL). Safety and objective response data following the protocol defined 8-week treatment period was presented at the American Society of Hematology Annual Meeting in December 2012. Due to signs of activity of MOR208 in this difficult to treat patient population, the study protocol was amended to allow those patients in the highest dose group benefitting from the treatment to enter a prolonged treatment group. The final study results including the extended treatment arm showed an overall response rate of 29.6% (according to IWCLL 2008 criteria) based on the safety population of the trial (n=27) - up from the previously reported 14.8%. A detailed analysis of the study results will be published in a peer-reviewed scientific journal.
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