Voyager Therapeutics Inc. never intended to give up its US rights to the Parkinson's disease candidate VY-AADC01 under its collaboration agreement with Sanofi, but now the company says that was a deal-breaker for its partner, which returned its ex-US rights to the gene therapy.
Voyager retained US rights to its lead product candidate when it negotiated a three-program deal with Sanofi in 2015. Even so, the company said after the stock market closed on Oct. 30 that the French big pharma decided not to exercise its option for ex-US rights to VY-AADC01, since it would not be able to participate in US commercialization
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