AI designs it. Robots build It. Humans decide. Inside Astellas' human-in-the-loop drug discovery.

Drug discovery has always been a numbers game with brutal odds. In Japan, only about 1 in 23,000 small molecules becomes a medicine, and a single program can run 9 to 16 years. Astellas set out to change those odds. Since 2019, the company has been building a "Human-in-the-Loop" platform that connects human expertise, AI prediction, and lab robotics into one continuous workflow, so that scientists spend less time on repetitive bench work and more time on the decisions that actually move a project forward. It is the same principle Chemspeed builds its automation around: close the loop between make and analyze, and let researchers focus on the science.

• Astellas runs a closed loop where AI designs and predicts compound properties, robotics handle synthesis, and researchers evaluate results, often remotely, then feed the data back to sharpen the next round.
• The approach cut the time to turn an early hit compound into a viable drug candidate by roughly 70 percent versus traditional methods.
• The platform surfaced promising compounds that manual selection might have overlooked, presenting activity and property data in one clear, decision-ready view.
• Adoption was earned, not forced. A small pilot group refined the system first, and breaking down silos between departments turned early skeptics into daily users.
• An AI-designed, AI-predicted, robot-synthesized compound has now advanced into clinical trials.

When human judgment, AI, and robotics run in the same loop instead of separate lanes, discovery stops waiting on the bottleneck and starts moving at the speed of the science. Closing that loop from synthesis to analysis is exactly what Chemspeed automation is built to do.

Source: Astellas Newsroom

• Video: Astellas' AI Drug Discovery Process. https://www.youtube.com/watch?v=aLJG_LQ1lSQ
• Article: The Future of Drug Discovery: Integrating Human, AI and Robotics (Apr 22, 2025). https://newsroom.astellas.com/2025-04-22-The-Future-of-Drug-Discovery-Integrating-Human,-AI-and-Robotics
• Article: Creating Innovative Medicines Through Collaboration Between AI and Humans (Mar 24, 2021). https://newsroom.astellas.com/2021-03-24-Creating-innovative-medicines-through-collaboration-between-AI-and-humans

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