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ImmunoGen, Inc. Announces Positive Regulatory Decisions For Roche’s Kadcyla® In The European Union And Japan

ImmunoGen, Inc. (Nasdaq: IMGN), a biotechnology company that develops novel anticancer therapeutics using its antibody-drug conjugate (ADC) technology, today announced positive decisions for Kadcyla (trastuzumab emtansine, formerly T-DM1) in both the European Union (EU) and Japan, the two largest pharmaceutical markets after the US. Kadcyla was approved for marketing in the US earlier this year.

The EU’s Committee for Medicinal Products for Human Use (CHMP) has recommended approval of Kadcyla for the treatment of adults with HER2-positive, inoperable locally advanced or metastatic breast cancer who previously received trastuzumab and a taxane, separately or in combination. This decision is based on the findings in the EMILIA Phase III trial. A decision by the European Commission is expected by year end. An approval decision would trigger a $5 million milestone payment to ImmunoGen.

The Japanese Ministry of Health, Labor and Welfare (MHLW) has approved Kadcyla for the treatment of inoperable or recurrent HER2-positive breast cancer based on results from a Japanese Phase II trial and the EMILIA Phase III trial. This event triggers a $5 million milestone payment to ImmunoGen.

“These positive decisions are important steps toward Kadcyla becoming available for patients in the EU and Japan,” commented Dan Junius, President and CEO.

The EMILIA trial assessed Kadcyla compared to standard therapy for the treatment of patients with HER2-positive metastatic breast cancer who had previously received Herceptin ® (trastuzumab) and a taxane. Kadcyla demonstrated a significant improvement in overall survival and in progression-free survival, and fewer patients experienced severe adverse events, compared to standard therapy.

Kadcyla consists of Roche’s trastuzumab antibody and ImmunoGen’s DM1 cytotoxic agent. The DM1 is attached to the antibody using one of ImmunoGen’s linkers. Roche has global development and commercialization rights for Kadcyla; ImmunoGen is entitled to receive specified milestone payments and royalties on product sales.

Roche is conducting a number of studies assessing Kadcyla for potential additional uses. These include for the first-line treatment of HER2-positive metastatic breast cancer, for early stage HER2-positive breast cancer and for advanced HER2-positive gastric cancer.

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