Inclusion:
1. Age 18 years to 75 years
2. Diagnosis of AATD ZZ/ZNull genotypes
3. FEV1 ≥35% and ≤65%
4. No evidence of liver cirrhosis
5. Adequate chemistry and hematology measures at screening
6. Participants must agree not to participate in another interventional study for the duration of this trial.
7. Participants must be capable of providing signed informed consent
Exclusion Criteria:
1. AATD genotypes outside of ZZ or ZNull
2. Participants with total antibodies to adeno-associated virus (AAV) serotype above laboratory assay cut off
3. Participants who have known negative reaction or hypersensitivity to any lipid nanoparticles (LNP) component.
4. Any condition that, in the Investigator's opinion, could adversely affect the safety of the participant.
5. Unwilling to comply with study procedures.
View Inclusion and Exclusion Criteria at ClinicalTrials.gov