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CompletedNCT03815396rhAAT-FcUpdated Sep 13, 2022

Phase 1 Study to Assess the Safety, PK and PD of INBRX-101 in Adults With Alpha-1 Antitrypsin Deficiency

A Phase 1 interventional study of INBRX-101/rhAAT-Fc in Alpha-1 Antitrypsin Deficiency and AATD, sponsored by Inhibrx Biosciences, Inc. Completed at 10 sites in 3 countries. Open to participants aged 18 Years to 80 Years. Per ClinicalTrials.gov, last updated 2022-09-13.

Sponsored by Inhibrx Biosciences, Inc · Phase 1, Interventional, and Treatment

From the registry’s dates

  • Primary completion was Aug 2022, 4 years 2 months ago, and no results have been posted to the registry.
Phase
Phase 1
Study type
Interventional
Enrollment
31
Allocation
Non-randomized
Ages
18 Years to 80 Years
Sex
All
01

Study summary

This is an open-label, 2-part, dose-escalating, Phase 1 study of INBRX-101 (rhAAT-Fc). Part 1 will consist of single ascending dose (SAD) administration of INBRX-101 and Part 2 will consist of multiple ascending dose (MAD) administrations of INBRX-101. The planned dosing schedule is IV every 3 to 4 weeks.

02

Conditions studied

  • Alpha-1 Antitrypsin Deficiency
  • AATD

Keywords

  • Alpha-1 antitrypsin deficiency
  • AATD
  • alpha-1 disease
  • AAT
03

In context

alpha 1-Antitrypsin Deficiency

142 studies on the registry are indexed under alpha 1-Antitrypsin Deficiency; 32 are open to participants now.

This study's enrollment of 31 is close to the median of 32 across 86 interventional studies indexed under alpha 1-Antitrypsin Deficiency.

Browse alpha 1-Antitrypsin Deficiency studies →

Lead sponsor

Inhibrx Biosciences, Inc is the lead sponsor of 6 studies on the registry; 3 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Documented alpha-1 antitrypsin (AAT) serum concentration \<11 μM.
  • Diagnosis of alpha-1 antitrypsin deficiency (AATD) with any allelic combination with exception of the null/null genotype.
  • For subjects in Part 2 80 and 120 mg/kg cohorts ONLY: post-bronchodilator of at least 40% of predicted normal value.
  • For subjects in Part 2 80 and 120 mg/kg cohorts ONLY: subjects eligible for bronchoscopy per judgment of investigator.
  • Nonsmoker for at least 6 months prior to study and must remain nonsmoking for the entire study duration.
  • Adequate hepatic and renal function as defined per protocol.
  • Willing to undergo current augmentation therapy washout (if applicable) and refrain from initiating augmentation therapy, other drug trials for AATD, therapy with IV immunoglobulins or monoclonal antibodies during the entire study, including follow-up.

Exclusion criteria

Exclusion Criteria:

  • Known or suspected allergy to components of INBRX-101 (AAT or human IgG) or pdAAT.
  • Participation in any drug trial within 30 days prior to this trial, or subjects receiving IV immunoglobulins or monoclonal antibodies within 30 days prior to this trial.
  • History of and/or on the waiting list for lung or liver transplant, lobectomy, or lung volume reduction surgery.
  • Acute respiratory tract infection or exacerbation that required antibiotic treatment and/or increase in systemic dosage within the 4 weeks prior to screening. Subjects are permitted to continue to receive steroids if the investigator judges the subject to have a history of stable dosing.
  • Subjects with ongoing or history of unstable cor pulmonale.
  • Infection with hepatitis A, B, or C or (HIV).
  • Active disease or documented history of autoimmune disease that 1) required systemic steroids or immune-suppressive medications and 2) tested positive for auto-antibodies. Exception: Endocrinopathies managed with hormone replacement therapy (HRT).
  • Current substance and/or alcohol abuse with protocol defined exceptions.
  • Current narcotics abuse with protocol defined exceptions.
Terms in these criteria, in plain language(6)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

FEV1

From a breathing test (spirometry): how much air you can blow out in the first second. Often given as a percentage of what is expected for your age, height and sex.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

COPD

Chronic obstructive pulmonary disease: long-term lung disease that makes it hard to breathe out, including emphysema and chronic bronchitis.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Autoimmune disease

A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.

Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.

05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Sequential assignment
Masking
None (open label)
Enrollment
31 participants (actual)

Study arms

  • Experimental
    Part 1 Single Ascending Dose

    INBRX-101 will be escalated in subjects with alpha-1 antitrypsin deficiency (AATD).

    Drug: INBRX-101/rhAAT-Fc

  • Experimental
    Part 2 Multiple Ascending Dose

    INBRX-101 will be escalated in subjects with alpha-1 antitrypsin deficiency (AATD).

    Drug: INBRX-101/rhAAT-Fc

Interventions

  • DrugINBRX-101/rhAAT-Fc

    INBRX-101 is a recombinant human alpha-1 antitrypsin (AAT) Fc fusion protein (rhAAT-Fc).

06

What researchers measure

Primary outcomes

  1. Frequency of adverse events of INBRX-101

    Adverse events will be assessed by the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE), version 4.03.

    Time frame: Up to 7 months

  2. Severity of adverse events of INBRX-101

    Severity of adverse events will be assessed and assigned by the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE), version 4.03.

    Time frame: Up to 7 months

Secondary outcomes

  1. Area under the serum concentration time curve (AUC) of INBRX-101

    Area under the serum concentration time curve (AUC) of INBRX-101 will be determined.

    Time frame: Up to 7 months

  2. Maximum observed serum concentration (Cmax) of INBRX-101

    Maximum observed serum concentration (Cmax) of INBRX-101 will be determined.

    Time frame: Up to 7 months

  3. Trough observed serum concentration (Ctrough) of INBRX-101

    Trough observed serum concentration (Cmax) of INBRX-101 will be determined.

    Time frame: Up to 7 months

  4. Time to Cmax (Tmax) of INBRX-101

    Time to Cmax (Tmax) of INBRX-101 will be determined.

    Time frame: Up to 7 months

  5. Half-life (T1/2) of INBRX-101

    Half-life of INBRX-101 will be determined.

    Time frame: Up to 7 months

  6. Immunogenicity of INBRX-101

    Frequency and consequences of anti-drug antibodies (ADA) against INBRX-101 will be determined.

    Time frame: Up to 7 months

  7. Distribution of INBRX-101 in Bronchoalveolar Lavage Fluid (BALF)

    The concentration of INBRX-101 in bronchoalveolar lavage fluid (BALF) be determined.

    Time frame: Up to 7 months

  8. Functional concentration of INBRX-101 in serum and BALF

    The functional concentration of INBRX-101 in serum and BALF will be determined.

    Time frame: Up to 7 months

07

Study locations

10 sites
  • UC Davis School of Medicine
    Sacramento, California 95817, United States
  • University of Florida College of Medicine
    Gainesville, Florida 32611, United States
  • University of Miami
    Miami, Florida 33125, United States
  • Indiana University
    Indianapolis, Indiana 46202, United States
  • Hannibal Clinic
    Hannibal, Missouri 63401, United States
  • The New Zealand Respiratory and Sleep Institute
    Auckland, New Zealand
  • Christchurch Clinical Studies Trust Ltd
    Christchurch, New Zealand
  • Waikato Respiratory and Gastro Research Unit
    Hamilton, New Zealand
  • University of Cambridge
    Cambridge, East Of England CB2 0QQ, United Kingdom
  • University Hospital Birmingham NHS Foundation Trust
    Birmingham, West Midlands B15 2GW, United Kingdom
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 13, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03815396
Lead sponsor
Inhibrx Biosciences, Inc
Responsible party
Sponsor
First posted
Jan 24, 2019
Start date
Jul 19, 2019
Primary completion
Aug 18, 2022
Completion
Aug 18, 2022
Last update
Sep 13, 2022

Study contacts

Vasily Andrianov, MD
study director · Inhibrx Biosciences, Inc

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Sep 2022. You cannot join it, but the record below documents what was studied.

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