Scoop: As Sio closes, former CEO from ‘vant exit finds himself at helm of Irv Weissman stealth biotech

Stanford stem cell luminary Irv Weissman is building a new biotech around the ‘don’t eat me’ signal CD47 — but instead of cancer, the new biotech is developing anti-CD47 therapies for heart disease.

Nicholas Leeper

Bitterroot Bio, named after the Bitterroot river in Weissman’s...

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