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In Brief: Mosaic Gains Two Clinical-Stage Oncology Assets From Astex

With This In-Licensing, Mosaic Evolves Into A Clinical-Stage Oncology Player

 
• By Sushmita Panda

Mosaic Therapeutics has in-licensed two clinical-stage oncology assets from Astex Pharmaceuticals to develop proprietary combination therapies for hard-to-treat cancers. The deal includes up to a 22% equity stake for Astex, future revenue sharing, and a planned clinical study in 2026.

Cancer Cells
The two small molecule assets from Astex are ASTX029 and ASTX295. (Shutterstock)

Mosaic Therapeutics is in-licensing of two clinical-stage oncology programs from Astex Pharmaceuticals in a deal that will significantly accelerate Mosaic’s development path, with its first clinical combination study expected to begin in 2026.

As part of the agreement, Astex, which is wholly owned by Japan’s Otsuka Pharmaceutical, has acquired a 19% equity stake...

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