Phase 3 Study to Evaluate Efficacy and Safety of Lenzilumab in Patients With COVID-19
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ClinicalTrials.gov Identifier: NCT04351152 |
Recruitment Status :
Recruiting
First Posted : April 17, 2020
Last Update Posted : August 5, 2020
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Condition or disease | Intervention/treatment | Phase |
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Coronavirus Disease 2019 (COVID-19) Pneumonia | Biological: Lenzilumab Drug: Standard of Care | Phase 3 |
In COVID-19, high levels of granulocyte macrophage-colony stimulating factor (GM-CSF) and inflammatory myeloid cells correlate with disease severity, cytokine storm, and respiratory failure. This phase 3 randomized, double-blind, multicenter, placebo-controlled clinical trial will evaluate the impact of lenzilumab (anti-human GM-CSF monoclonal antibody) on time to recovery in hospitalized patients with severe or critical COVID-19 pneumonia.
Approximately 300 patients will be randomized to receive lenzilumab + SOC vs. SOC in a 1:1 ratio. A pre-specified interim futility analysis is planned for the DSMB.
Study Type : | Interventional (Clinical Trial) |
Estimated Enrollment : | 300 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Masking: | Double (Participant, Investigator) |
Masking Description: | Double-Blind |
Primary Purpose: | Treatment |
Official Title: | A Phase 3 Randomized, Placebo-Controlled Study of Lenzilumab in Hospitalized Patients With Severe and Critical COVID-19 Pneumonia |
Actual Study Start Date : | April 30, 2020 |
Estimated Primary Completion Date : | September 2020 |
Estimated Study Completion Date : | September 2020 |
Arm | Intervention/treatment |
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Experimental: Lenzilumab Arm
Participants will receive IV infusion of lenzilumab upon randomization at a pre-specified dosing interval and continued administration of standard of care
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Biological: Lenzilumab
Administered as an intravenous (IV) infusion
Other Name: Humaneered® anti-human GM-CSF monoclonal Antibody Drug: Standard of Care Standard of care therapy per local written policies or guidelines |
Placebo Comparator: Placebo Arm
Participants will receive IV infusion of saline upon randomization matched to lenzilumab at same pre-specified dosing interval and continued administration of standard of care
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Drug: Standard of Care
Standard of care therapy per local written policies or guidelines |
- Time to Recovery [ Time Frame: Up to 28 days ]Time to recovery is defined as the first day on which a subject satisfies one of the following 3 categories from the 8-point ordinal scale (Hospitalized, not requiring supplemental oxygen-no longer requires ongoing medical care; Not hospitalized, limitation on activities and/or requiring home oxygen; Not hospitalized, no limitations on activities).
- Incidence of Invasive Mechanical Ventilation and/or Death [ Time Frame: Up to 28 days ]
- Incidence of severe acute respiratory distress syndrome (ARDS) [ Time Frame: Up to 28 days ]
- Duration of Intensive Care Unit (ICU) Stay [ Time Frame: Up to 28 days ]
- Ventilator-free Days [ Time Frame: Up to 60 days ]
- Duration of Hospitalization [ Time Frame: Up to 28 days ]
- Time to Improvement in 1 or 2 Categories using 8-point Ordinal Scale [ Time Frame: Up to Day 28 ]
- Time to Death [ Time Frame: Up to Day 28 ]
- Number of Subjects Alive and Off Oxygen [ Time Frame: Up to 60 days ]
- Percentage of Participants Experiencing Adverse Events [ Time Frame: Up to 60 days ]Using the National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) version 5.0
- Percentage of Participants Experiencing Serious Adverse Events [ Time Frame: Up to 60 days ]Using the NCI CTCAE version 5.0
- Proportion of Subjects Discharged from Hospital [ Time Frame: Up to Day 60 ]
- All-cause Mortality and Proportion of Subjects Alive [ Time Frame: Day 28 and Day 60 ]
- Time to improvement in oxygenation for > 48 hours [ Time Frame: Up to Day 28 ]
- Incidence of Non-invasive Ventilation (or Use of High-flow Oxygen Device) [ Time Frame: Up to Day 28 ]
- Time to Clinical Improvement, Defined as NEWS2 < 2 Maintained for 24 Hours [ Time Frame: Up to Day 28 ]NEWS2 consists of: Physiological Parameters: respiration rate (per minute), SpO2 Scale 1 (%), SpO2 Scale 2 (%), use of air or oxygen, systolic blood pressure (mmHg), pulse (per minute), consciousness and temperature (°C)
- Change from Baseline to Day 28 in Clinical status Based on the 8-point Ordinal Scale [ Time Frame: Up to Day 28 ]
- Duration of Time on Low-flow or High-flow Supplemental Oxygen [ Time Frame: Up to Day 28 ]

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Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- Adults 18 years of age or older who are capable of providing informed consent or have a proxy capable of giving consent for them
- Virologic confirmation of SARS-CoV-2 infection via any FDA authorized diagnostic test for SARS-CoV-2
- Pneumonia diagnosed by Chest X-ray or Computed Tomography revealing infiltrates consistent with pneumonia
- SpO2 ≤ 94% on room air and/or require supplemental oxygen (including high-flow oxygen support or NPPV)
- Hospitalized, not requiring invasive mechanical ventilation during this hospitalization
- Have not participated in other clinical trial for COVID-19 using an immunomodulatory monoclonal antibody or kinase inhibitor (use of remdesivir, corticosteroids, convalescent plasma, hydroxychloroquine or chloroquine is permitted)
- Females of childbearing potential must have a negative serum or urine pregnancy test
Exclusion Criteria:
- Requiring invasive mechanical ventilation or extracorporeal membrane oxygenation prior to randomization
- Confirmed diagnosis of bacterial pneumonia or other active/uncontrolled fungal or viral infections at screening/baseline
- Known active tuberculosis (TB), history of incompletely treated TB or suspected or known extrapulmonary TB
- Currently receiving treatment for hepatitis A, hepatitis B, hepatitis C or HIV infection
- History of pulmonary alveolar proteinosis (PAP)
- Women of childbearing potential who are pregnant or breastfeeding
- Known hypersensitivity to lenzilumab or any of its components
- Use of any FDA approved anti-IL-6 (e.g., tocilizumab, sarilumab, sitlukimab), anti-IL-1 (e.g., anakinra, canakinumab) or kinase inhibitor (e.g., baracitinib, ibrutinib, acalabrutinib) therapy to treat COVID-19 within 8 weeks prior to randomization
- Use of GM-CSF agents (e.g., sargramostim) within prior 2 months of randomization
- Expected survival < 24h in the opinion of the investigator
- Any condition that, in the opinion of the investigator, is likely to interfere with the safety and efficacy of the study treatment or puts the patient at unacceptably high risk from the study

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04351152
Contact: Omar Ahmed, PharmD | 201-509-0713 | oahmed@humanigen.com | |
Contact: CTI Clinical Trial & Consulting Services (CRO) | 513-598-9290 | HumanigenPhase3@ctifacts.com |
United States, Arizona | |
Mayo Clinic | Recruiting |
Phoenix, Arizona, United States, 85054 | |
United States, California | |
University of Southern California (USC) Medical Center | Recruiting |
Los Angeles, California, United States, 90033 | |
USC - Los Angeles County Medical Center | Recruiting |
Los Angeles, California, United States, 90033 | |
Contact: M Center | |
United States, Florida | |
Baptist Medical Center | Recruiting |
Jacksonville, Florida, United States, 32207 | |
Mayo Clinic | Recruiting |
Jacksonville, Florida, United States, 32216 | |
AdventHealth Orlando | Recruiting |
Orlando, Florida, United States, 32803 | |
United States, Georgia | |
Emory University | Recruiting |
Atlanta, Georgia, United States, 30322 | |
United States, Kentucky | |
St. Elizabeth Healthcare | Recruiting |
Edgewood, Kentucky, United States, 41017 | |
United States, Minnesota | |
Hennepin County Medical Center | Recruiting |
Minneapolis, Minnesota, United States, 55415 | |
Mayo Clinic | Recruiting |
Rochester, Minnesota, United States, 55905 | |
United States, New Hampshire | |
Dartmouth-Hitchcock | Recruiting |
Lebanon, New Hampshire, United States, 03756 | |
United States, New Jersey | |
Saint Barnabas Medical Center | Recruiting |
Livingston, New Jersey, United States, 07039 | |
United States, North Carolina | |
Atrium Health | Recruiting |
Charlotte, North Carolina, United States, 28203 | |
United States, Texas | |
St. David's Healthcare | Recruiting |
Austin, Texas, United States, 78705 | |
St. David's North Austin Medical Center | Recruiting |
Austin, Texas, United States, 78758 | |
Texas Health | Recruiting |
Dallas, Texas, United States, 75231 |
Study Director: | Cameron Durrant, MD | Humanigen, Inc. |
Responsible Party: | Humanigen, Inc. |
ClinicalTrials.gov Identifier: | NCT04351152 |
Other Study ID Numbers: |
HGEN003-06 |
First Posted: | April 17, 2020 Key Record Dates |
Last Update Posted: | August 5, 2020 |
Last Verified: | August 2020 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | Yes |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
Granulocyte Macrophage-Colony Stimulating Factor (GM-CSF) GM-CSF monoclonal antibody Cytokine Release Syndrome (CRS) Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) |
Coronavirus Infections Pneumonia Lung Diseases Respiratory Tract Diseases Respiratory Tract Infections Coronaviridae Infections |
Nidovirales Infections RNA Virus Infections Virus Diseases Antibodies, Monoclonal Immunologic Factors Physiological Effects of Drugs |