Micromet and MedImmune to Present New Clinical Data for Anti-CD19 BiTE(R) Antibody at American Society of Hematology Annual Meeting Showing Objective Clinical Responses in Relapsed Non-Hodgkin's Lymphom...( BETHESDA and GAITHERSBURG Md. Nov...),Health

BETHESDA and GAITHERSBURG, Md., Nov. 29 /PRNewswire-FirstCall/ -- Micromet, Inc. (Nasdaq: MITI) and MedImmune, Inc. today announced that new data from an ongoing Phase 1 clinical trial of MT103 in patients with late- stage non-Hodgkin's lymphoma (NHL) will be presented at the 2007 Annual Meeting of the American Society of Hematology (ASH) on December 9 in Atlanta, Georgia. MT103, also known as MEDI-538, is a recombinant T-cell engaging antibody, or BiTE(R) antibody, targeting the CD19 antigen, which is uniquely expressed on B-cells. As the first BiTE antibody studied in humans, MT103 is currently being evaluated in Phase 1 and 2 clinical trials for the treatment of patients with various B-cell malignancies.

New data from the ongoing Phase 1 dose-escalating trial show evidence of objective complete and partial responses in relapsed follicular lymphoma (FL), mantle cell lymphoma (MCL), and chronic lymphocytic leukemia (CLL) patients. At the time of the analysis, dose levels tested ranged from 0.0005 to 0.030 mg/m2 per day, respectively. Among the 15 evaluable patients at dose levels of 0.015 and 0.030 mg/m2 per day, two complete responses, two partial responses, and two minimal responses were observed. One of the complete responses was in a patient with MCL. In addition, six patients experienced stable disease and three patients progressed during treatment. The full data set, which will include additional patients at a higher dose level than reported in the abstract, will be presented at ASH.

Six patients at dose levels 0.015 and 0.030 mg/m2 per day had tumor infiltration in the bone marrow, a location from which relapses of these diseases potentially emanate. The bone marrow infiltration in five out of si
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