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Prime Medicine Announces U.S. FDA Clearance of Investigational New Drug Application for PM647 in Alpha-1 Antitrypsin Deficiency

$PRMEPress releaseSep 24, 2026, 4:01 PM ETRead the release

Prime Medicine's IND application for PM647, an in vivo Prime Editor for Alpha-1 Antitrypsin Deficiency, was cleared by the FDA, enabling first-in-human testing in the U.S. The Phase 1/2 open-label trial will start with lung-only AATD adults and expand to a liver-disease cohort after tolerability is established; roughly 100,000 Americans carry the PiZZ genotype PM647 targets.

Key figures

Drug Name
PM647
Phase Of Trial
Phase 1/2
Us pizz patients
100000
Initial data expected
2027
Us europe pizz patients
200000

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