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AATD Program

Development stage
Preclinical
Lead developer
Prime Medicine
Modality
CRISPR-Cas9 → CRISPR Systems → Programmable Nucleases → Gene Editing → Gene Therapies, Lipid-based Nanoparticles → Nanoparticles → Drug Delivery Systems
Administration
Intravenous
01

Overview

Prime Medicine's AATD Program is an investigational gene-editing therapy designed to treat Alpha-1 Antitrypsin Deficiency (AATD) by precisely correcting the underlying genetic cause. Utilizing proprietary Prime Editing technology delivered via liver-targeted lipid nanoparticles (LNPs), the program aims to edit the E342K (Pi*Z) mutation in the *SERPINA1* gene. This correction restores the production of functional wild-type M-AAT protein, potentially addressing both the pulmonary and hepatic manifestations of the disease. Preclinical studies in humanized mouse models have demonstrated high levels of precise gene correction (up to 72%) and restoration of serum AAT to normal physiological levels. The program is currently in the IND-enabling stage, with clinical trial applications expected in mid-2026.

Other names
Prime Medicine-SERPINA1-Prime Editor (gene editing)-LNP delivery-Alpha-1 Antitrypsin DeficiencyAlpha-1 Antitrypsin Deficiency ProgramAlpha1 Antitrypsin Deficiency ProgramAlpha 1 Antitrypsin Deficiency ProgramSERPINA1 Prime Editing ProgramSERPINA-1 Prime Editing ProgramSERPINA 1 Prime Editing Program
02

Targets

SERPINA1 Z (Alpha-1-antitrypsin Z variant protein)

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