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Prime Medicine Receives U.S. FDA Regenerative Medicine Advanced Therapy (RMAT) Designation for PM359 for the Treatment of Chronic Granulomatous Disease (CGD)

$PRMEPress releaseJun 22, 2026, 8:00 AM ETRead the release

Prime Medicine announced that the FDA granted Regenerative Medicine Advanced Therapy (RMAT) designation to PM359 for the treatment of p47(phox)-deficient chronic granulomatous disease (CGD). The designation is based on Phase 1/2 clinical data published in The New England Journal of Medicine, which showed that a single dose drove rapid engraftment and clinically meaningful restoration of immune function in treated patients.

Key figures

Drug Name
PM359
Phase Of Trial
Phase 1/2
Treated patients
2

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