Stage 1 Study of ARALAST NP and GLASSIA in A1PI Deficiency

Inclusion Criteria:

1. ≥18 years of age at the time of screening

2. Endogenous plasma Alpha1-Proteinase Inhibitor (A1PI) level <8 μM at any time during
the Screening period for treatment-naïve participants, or following 4-weeks minimum
wash-out from previous augmentation therapy in treatment-experienced participants. The
screening plasma A1PI level may be repeated if a participant obtains an exclusionary
value that is suspected to be due to inadequate washout of A1PI).

3. Participant has documented A1PI genotype of Pi*Z/Z, Pi*Z/Null, Pi*Malton/Z,
Pi*Null/Null, or other rare genotypes (except PI*MS, PI*MZ, or PI*SZ).

4. Clinically evident mild-moderate chronic obstructive pulmonary disease (COPD)
(according to GOLD criteria for diagnosis) at the time of screening.

5. If the participant is treated with any respiratory medications including inhaled
bronchodilators, inhaled corticosteroids, or systemic corticosteroids (e.g. prednisone
≤ 10 mg/day or its equivalent), the doses of the participant's medications have
remained stable for at least 28 days prior to screening.

6. No clinically significant abnormalities (other than emphysema, bronchitis or
bronchiectasis) detected via a chest computed tomography (CT) or chest X-ray at the
time of screening.

7. If female of childbearing potential, participant must have a negative pregnancy test
at screening and agree to employ adequate birth control measures for the duration of
the study.

8. Participant is willing and able to comply with the requirements of the protocol.

Exclusion Criteria:

1. Known ongoing or history of clinically significant pulmonary impairment other than
emphysema/ COPD.

2. The participant is experiencing lower respiratory infection (LRTI)/acute pulmonary
exacerbation (APE) at the time of enrollment (signing Informed consent form (ICF)).
Participant may be rescreened after both clinical resolution of LRTI/APE and having
also remained stable for at least 4 weeks after the end of LRTI/APE).

3. Known ongoing or history of cor pulmonale.

4. Known resting partial pressure of carbon dioxide (PaCO2) levels of > 45 mmHg.

5. Clinically significant congestive heart failure with New York Heart Association (NYHA)
Class III/IV symptoms.

6. The participant has received an organ transplant, has undergone major lung surgery, or
is currently on a transplant list.

7. Known history of ongoing malignancy (other than adequately treated basal cell or
squamous cell carcinoma of the skin or carcinoma in situ of the cervix).

8. Smoker or participant that has ceased smoking for less than one year prior to
screening whose levels of cotinine are outside of the normal range of a nonsmoker.

All participants must agree to refrain from smoking throughout the course of the
study.

9. The participant is receiving long-term therapy (> 28 days) of parenteral
corticosteroids or oral corticosteroids at doses greater than 10 mg/day of prednisone
or its equivalent).

10. The participant is receiving long-term round-the-clock oxygen supplementation (other
than temporary for acute COPD exacerbation, or supplemental oxygen (O2) with
continuous positive airway pressure [CPAP], or bi-level positive airway pressure
[BiPAP] during the day).

11. Participant has contraindications for CT (e.g. body weight and/or body size exceeding
the weight and gantry size limits specified by the manufacturer of the CT scanner,
inability to lie flat in the CT scanner, claustrophobia, metal prosthesis or pacemaker
in the chest wall or upper extremity that would impact lung density assessment).

12. Participant is unwilling or unable to modify bronchodilator medications for 6 hours
for short acting β2 agonists, 24 hours for long-acting β2 agonists, and 48 hours for
long acting anticholinergics prior to the scheduled quantitative CT scan.

13. Known severe immunoglobulin A (IgA) deficiency (ie, IgA level < 8 mg/dL at screening).

14. Known history of hypersensitivity following infusions of human blood or blood
components (eg, human immunoglobulins or human albumin).

15. Presence of clinically significant laboratory abnormalities at the screening

16. The participant has a clinically significant medical, psychiatric, or cognitive
illness, is a recreational drug/alcohol user, or has any other uncontrolled medical
condition (eg, unstable angina, transient ischemic attack, uncontrolled hypertension)
that, in the opinion of the investigator, would affect participant's safety or
compliance or confound the results of the study.

17. Participant has been exposed to another IP within 28 days prior to enrollment or is
scheduled to participate in another clinical study involving an IP or investigational
device during the course of this study.

18. Participant is a family member or employee of the investigator.

19. If female, participant is pregnant or nursing at the time of enrollment.