BETHESDA, Md., Feb. 12 /PRNewswire-FirstCall/ -- Micromet, Inc. , a biopharmaceutical company developing novel, proprietary antibodies for the treatment of cancer, inflammation and autoimmune diseases, today announced the publication of a comprehensive review article entitled, “BiTE: A new class of antibodies that recruit T cells” in the journal Drugs of the Future. BiTE(R) antibodies are designed to activate the body’s T cells to seek and destroy cancer cells in a tightly controlled manner.
The review article discusses recently published preclinical and clinical data on BiTE antibodies, which are evolving into a new class of antibody-based therapeutics, with several new members in various stages of development. One emphasis is on CD19-specific BiTE antibody MT103 (also known as MEDI-538), which produced complete and partial responses at generally well tolerated and very low doses in late-stage lymphoma patients. Another emphasis is on several preclinical studies showing significant anti-tumor activity of three other BiTE antibodies targeting solid tumors by EpCAM (CD326), EphA2 or CEA antigens. All three tumor-associated antigens are found on many solid tumors. In addition, the article provides a detailed description of the mode of action of BiTE antibodies, comparing it to natural T-cell responses.
“Our latest review article demonstrates the clinical progress and high level of scientific understanding the company has acquired in numerous published studies about its proprietary BiTE antibody technology,” commented Patrick A. Baeuerle, Micromet’s chief scientific officer. “BiTE antibodies represent a novel platform of clinically-validated, antibody-based therapeutics for the treatment of a wide range of cancers.”
About BiTE(R) Antibodies
BiTE(R) antibodies are designed to direct the body’s cytotoxic, or cell- destroying, T cells against tumor cells, and represent a new therapeutic approach to cancer therapy. BiTE antibodies have been shown to induce an immunological synapse between a T cell and a tumor cell in the same manner as observed during physiological T cell attacks. These cytolytic synapses enable the delivery of cytotoxic proteins from T cells into tumor cells, ultimately inducing a self-destruction process in the tumor cell referred to as “apoptosis,” or programmed cell death. In the presence of BiTE antibodies, T cells have been demonstrated to serially eliminate tumor cells, which explains the activity of BiTE antibodies at very low concentrations and at very low ratios of T cells to target tumor cells. Through the process of killing cancer cells, T cells proliferate, which leads to an increased number of T cells at the site of attack.
Several antibodies in Micromet’s product pipeline are BiTE antibodies and have been generated based on Micromet’s proprietary BiTE product development platform. The most advanced BiTE antibody is MT103 (MEDI-538) targeting CD19, and is being tested in a phase 2 clinical trial in acute lymphoblastic leukaemia patients and in an ongoing phase 1 clinical study in advanced non- Hodgkin’s lymphoma patients. Three other BiTE antibodies, targeting EpCAM (CD326), CEA and MCSP, are in pre-clinical development.
BiTE is a registered trademark of Micromet.
About Micromet, Inc. (www.micromet-inc.com)
Micromet, Inc. is a biopharmaceutical company developing novel, proprietary antibodies for the treatment of cancer, inflammation and autoimmune diseases. Three of its antibodies are in clinical development. MT103 (MEDI-538), the first antibody in Micromet’s product pipeline developed utilizing the BiTE(R) antibody technology platform, is being evaluated in a phase 2 clinical trial for the treatment of patients with acute lymphoblastic leukemia, and in a phase 1 clinical trial for the treatment of patients with non-Hodgkin’s lymphoma. BiTE antibodies represent a new class of therapeutic antibodies that activate a patient’s own cytotoxic T cells to eliminate cancer cells. Micromet is developing MT103 in collaboration with MedImmune, a subsidiary of Astra Zeneca plc. The second clinical stage antibody is adecatumumab (MT201), a human monoclonal antibody targeting EpCAM expressing tumors. Adecatumumab is being developed by Micromet in collaboration with Merck Serono in a phase 1b clinical trial evaluating adecatumumab in combination with docetaxel for the treatment of patients with metastatic breast cancer. The third clinical stage antibody is MT293 (formerly D93), also known as TRC093, a first-in-class humanized monoclonal antibody that inhibits angiogenesis and tumor cell growth by binding cleaved collagen. MT293, which is currently being tested in a phase 1 clinical trial, is licensed to TRACON Pharmaceuticals, Inc. and is being developed for the treatment of patients with cancer and age-related macular degeneration. In addition, Micromet has established a collaboration with Nycomed for the development and commercialization of MT203, Micromet’s human antibody neutralizing the activity of granulocyte/macrophage colony stimulating factor (GM-CSF), which has potential applications in the treatment of various inflammatory and autoimmune diseases, such as rheumatoid arthritis, psoriasis, or multiple sclerosis.
Forward-Looking Statements
This release contains certain forward-looking statements that involve risks and uncertainties that could cause actual results to be materially different from historical results or from any future results expressed or implied by such forward-looking statements. Factors that may cause actual results to differ materially from any future results expressed or implied by any forward-looking statements include the risk that product candidates that appeared promising in early research, preclinical studies or clinical trials do not demonstrate safety and/or efficacy in subsequent clinical trials, the risk that encouraging results from early research, preclinical studies or clinical trials may not be confirmed upon further analysis of the detailed results of such research, preclinical study or clinical trial, the risk that additional information relating to the safety, efficacy or tolerability of our product candidates may be discovered upon further analysis of preclinical or clinical trial data, the risk that we or our collaborators will not obtain approval to market our product candidates, the risks associated with reliance on outside financing to meet capital requirements, and the risks associated with reliance on collaborators, including MedImmune, Merck Serono, TRACON and Nycomed, for the funding or conduct of further development and commercialization activities relating to our product candidates. You are urged to consider statements that include the words “ongoing”, “may”, “will”, “would”, “could”, “should”, “believes”, “estimates”, “projects”, “potential”, “expects”, “suggests”, “plans”, “anticipates”, “intends”, “continues”, “forecast”, “designed”, “goal”, or the negative of those words or other comparable words to be uncertain and forward-looking. These factors and others are more fully discussed in our periodic reports and other filings with the SEC.
Any forward-looking statements are made pursuant to Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, and, as such, speak only as of the date made. Micromet, Inc. undertakes no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise.
Reference
(1) Baeuerle PA, Reinhardt C, and Kufer B (2008). BiTE: A new class of
antibodies that recruit T cells. Drugs Future, 2008, in press.
CONTACT: Media, Andrea tenBroek, or Chris Stamm, +1-781-684-0770,
micromet@schwartz-pr.com; or Investors, Susan Noonan, +1-212-966-3650,
susan@sanoonan.com; all for Micromet, Inc.
Web site: http://www.micromet-inc.com/
