Jazz Pharma and ImmunoGen announce strategic collaboration to develop Antibody-drug conjugate products

Jazz Pharmaceuticals plc and ImmunoGen, Inc. announced that the companies have entered into a collaboration and option agreement granting Jazz Pharmaceuticals exclusive, worldwide rights to opt into development and commercialization of two early-stage, hematology-related antibody-drug conjugate (ADC) programs, as well as an additional program to be designated during the term of the agreement.

The programs covered under the agreement include IMGN779, a CD33-targeted ADC for the treatment of acute myeloid leukemia (AML) in Phase 1 testing, and IMGN632, a CD123-targeted ADC for hematological malignancies expected to enter clinical testing before the end of the year.

Under the terms of the agreement, ImmunoGen will be responsible for the development of the three ADC programs prior to any potential opt-in by Jazz. Following any opt-in, Jazz would be responsible for any further development as well as for potential regulatory submissions and commercialization.

As part of the agreement, Jazz will pay ImmunoGen an upfront payment of $75 million. Additionally, Jazz will pay ImmunoGen up to $100 million in development funding over seven years to support the three ADC programs. For each program, Jazz may exercise its opt-in right at any time prior to a pivotal study or any time prior to a biologics license application (BLA) upon payment of an option exercise fee of mid-double digit millions or low triple digit millions, respectively. For each program to which Jazz elects to opt-in, ImmunoGen would be eligible to receive milestone payments based on receiving regulatory approval of the applicable product, plus tiered royalties as a percentage of commercial sales by Jazz, which depending upon sales levels and the stage of development at the time of opt-in, range from mid- to high single digits in the lowest tier to low 10's to low 20's in the highest tier. After opt-in, Jazz and ImmunoGen would share costs associated with developing and obtaining regulatory approvals of the applicable product in the United States (U.S.) and the European Union. ImmunoGen has the right to co-commercialize in the U.S. one product (or two products, under certain limited circumstances) with U.S. profit sharing in lieu of Jazz's payment of the U.S. milestone and royalties to ImmunoGen.

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