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COVID-19Phase 2/3NCT04494984

A Study to Investigate the Pharmacokinetics, Efficacy and Safety of INM005 in Patients With COVID-19.

A Phase 2/3 study testing INM005 in people with COVID-19, run by Inmunova S.A. at 19 sites in Argentina.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

This study aims to analyze the efficacy and safety of passive immunotherapy by administering an equine hyperimmune serum (INM005) against the SARS-CoV-2 receptor binding domain (RBD) to COVID-19 patients. Improvement of the clinical course 28 days after the start of treatment will be evaluated. Read more about this study

Who is it for?
Ages 18 to 79 years
Conditions the study is for
COVID-19
What is being tested?
INM005
Type of treatment
Injection or infusion
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
243 participants
Where
19 sitesArgentina
Study dates
27 Jul 2020to 30 Dec 2020
Phase
Phase 2/3
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 79 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Subjects of both sexes aged 18 to 79 years of age
  • SARS-CoV-2 infection confirmed by polymerase chain reaction (PCR) for virus detection
  • Patients with moderate or severe disease by NIH definition, which requires hospitalization.
  • Acceptance to participate in the study by the signature of the informed consent by a subject or their relative, if applicable
  • Be within 10 days of the onset of symptoms at the time of the Screening visit according to a case definition from the National Ministry of Health
  • Female patients of child-bearing age with negative pregnancy test

Who cannot join

  • Patients who have received treatment with plasma from COVID-19 convalescents.
  • Patients who are participating in other therapeutic clinical trials
  • Patients who require mechanical respiratory assistance or are hospitalized in the ICU at the time of the screening visit.
  • History of anaphylaxis, prior administration of equine serum (por example, anti-tetanus serum or anti-ophidic serum or anti-arachnid toxin serum) or allergic reaction due to contact or exposure to horses.
  • Pregnant or breastfeeding women
  • Patients who, at the doctor's discretion, are likely to die within the next 30 days due to a concomitant disease other than the study disease
  • Patients who are expected to be referred to another institution within 72 hours of enrollment, which prevents proper follow-up of that patient.

Trial locations and contacts

19 sites in 1 country.

19 sites in 1 country

Argentina19 sites
  • Sanatorio Guemes

    Buenos Aires, C1180AAD

  • Hospital Italiano de Buenos Aires

    Buenos Aires, C1199ABH

  • Hospital Muñiz

    Buenos Aires, C1282AEN

  • Hospital Pirovano

    Buenos Aires, C1428

  • Hospital de Cuenca Alta

    Canuelas, Buenos Aires, B1814

  • Centro Gallego de Buenos Aires

    Ciudad Autonoma de Buenos Aire

  • Clínica Adventista Belgrano

    Ciudad Autonoma de Buenos Aire

  • Clínica Zabala

    Ciudad Autonoma de Buenos Aire

  • Hospital Español de Buenos Aires

    Ciudad Autonoma de Buenos Aire

  • Sanatorio Agote

    Ciudad Autonoma de Buenos Aire

  • Sanatorio Sagrado Corazón

    Ciudad Autonoma de Buenos Aire

  • Hospital Prof. Dr. Bernardo A. Houssay

    Florida, Buenos Aires

  • Instituto Medico Platense

    La Plata, Buenos Aires, B1900AVG

  • Hospital Italiano de La Plata

    La Plata, Buenos Aires

  • Hospital Provincial Neuquén "Dr. Eduardo Castro Rendón"

    Neuquén, Neuquén Province

  • Hospital Municipal Emilio Zerboni

    San Antonio de Areco, Buenos Aires

  • Hospital Alta Complejidad "El Cruce" Dr. Néstor Carlos Kirchner

    San Juan Bautista, Buenos Aires

  • Hospital Municipal Dr. Diego E. Thompson

    San Martín, Buenos Aires

  • Hospital Centro de Salud Zenón J. Santillán

    San Miguel de Tucumán, Tucumán Province

Other trials in Argentina

About this study

Official title: A Phase 2/3, Adaptive, Randomized, Controlled, Double-blind Study to Investigate the Pharmacokinetics, Efficacy and Safety of the Hyperimmune Equine Serum (INM005) in Adult Patients With Moderate to Severe Confirmed SARS-CoV-2 Disease.

This study aims to analyze the efficacy and safety of passive immunotherapy by administering an equine hyperimmune serum (INM005) against the SARS-CoV-2 receptor binding domain (RBD) to COVID-19 patients. Improvement of the clinical course 28 days after the start of treatment will be evaluated.

Read the detailed description

The pandemic caused by the new coronavirus has generated a situation unprecedented in recent history, with several million infected and hundreds of thousands of deaths. This disease is easily transmissible by air. Although a high percentage of cases present mild clinical presentation, approximately 15% of patients present moderate to severe cases and 5% require critical care, with respiratory assistance and a high risk of mortality. No effective therapies for the treatment or prevention of SARS-CoV-2 have been identified yet. Preliminary evidence indicates that passive immunotherapy with convalescent plasma could alter the clinical course of this infection in a favorable manner. This strategy, even if confirmed as successful, requires voluntary donation by patients who have recovered, not all of whom are eligible as donors, since the antibody response varies in magnitude in different patients. This adaptive stage II/III study aims to analyze the efficacy and safety of passive immunotherapy by administering a purified Fab fraction of equine hyperimmune serum (INM005) generated from antigenic stimulation with the SARS-CoV-2 RBD protein, with the objective of neutralizing the interaction of SARS-CoV-2 with its cellular receptor, thus preventing the multiplication of the virus. The safety of this type of equine hyperimmune sera has already been demonstrated in previous and ongoing protocols with a biologically equivalent product against the E. Coli shiga toxin to treat patients with Hemolytic Uremic Syndrome (CT-INM004-01 and CT-INM004-02). In the present study, eligible patients will with moderate to severe symptoms of COVID-19 that require hospitalization will receive two 4 mg/kg doses of INM005, two days apart, with the aim of improving the clinical course of COVID-19 28 days after the start of treatment with the study drug.

Conditions
COVID-19
Being tested
INM005, Placebo
Medical subject headings
COVID-19

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • INM005Drug

    Also called COVIFAB

    The investigational medicinal product (IMP) dose to be studied will be 4 mg of protein/kg of subject's weight. The IMP will be added to the 100 mL infusion bag of saline solution. Doses will be administered as an infusion at 2.0 mL/min over 50 min with an interval of 48 h between doses.

  • PlaceboDrug

    Placebo substance will be added to the 100 mL infusion bag of saline solution. Doses will be administered as an infusion at 2.0 mL/min over 50 min with an interval of 48 h between doses.

Study groups in NCT04494984
Study groupRoleWhat they receive
ActiveActive comparatorSubjects will receive a 1st intravenous dose of 4 mg/kg INM005 (Anti-SARS-CoV-2 hyperimmune equine immunoglobulin F[ab']2 fragments) and a 2nd intravenous dose of 4 mg/kg of INM005. Each dose will be separated by 48 h (± 2 h).
Receives: Drug: INM005
PlaceboPlacebo comparatorSubjects will receive a 1st intravenous dose of Placebo and a 2nd intravenous dose of Placebo. Each dose will be separated by 48 h (± 2 h).
Receives: Drug: Placebo

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Number of Participants With Improvement in at Least Two Categories in WHO 8-point Ordinal Clinical Scale at Day 28 or Discharge

    The primary endpoint will be the proportion of patients who showed improvement 28 days after the administration of the first dose. A responding subject is defined as a subject with improvement in at least 2 categories on the 8-point World Health Organization (WHO) ordinal scale of clinical status or a subject who is discharged.

    The ordinal scale measures illness severity over time, the minimum value is 0 and the maximum value is 8. The higher is the score, the worse is the outcome. Detailed scale:

    0 = no evidence of infection,

    1. = outpatient, with no activities limitation;
    2. = outpatient, with activities limitation;
    3. = hospitalised with no oxygen therapy required;
    4. = oxygen therapy employing a mask;
    5. = non-invasive ventilation or high flow oxygen;
    6. = Mechanical ventilation;
    7. = mechanical ventilation and organ support (vasopressors, extracorporeal membrane oxygenation (ECMO), renal replacement therapy (RRT);
    8. = Death

    Measured: Discharge or up to Day 28

Secondary outcomes (15)
  1. Pharmacokinetics (PK) Evaluation of INM005 (Cmax)

    INM005 product concentration in serum at different time points after dosing. The following PK parameters were measured:

    • Cmax after (mg/L) Dose 1
    • Cmax (mg/L) after Dose 2

    Measured: 0, 1, 2, 3, 4, 6, 8, 12, 24, 48, 72, 96 hours post-dose

  2. Pharmacokinetics (PK) Evaluation of INM005 (Clearance)

    INM005 product concentration in serum at different time points after dosing. The following PK parameters were measured:

    • Clearance (mL/h) after Dose 1

    Measured: 0, 1, 2, 3, 4, 6, 8, 12, 24, 48, 72, 96 hours post-dose

  3. Pharmacokinetics (PK) Evaluation of INM005 (Weight-adjusted Clearance)

    INM005 product concentration in serum at different time points after dosing. The following PK parameters were measured:

    • Weight-adjusted Clearance (mL/h/kg) after Dose 1

    Measured: 0, 1, 2, 3, 4, 6, 8, 12, 24, 48, 72, 96 hours post-dose

  4. Pharmacokinetics (PK) Evaluation of INM005 (AUC0)

    INM005 product concentration in serum at different time points after dosing. The following PK parameters were measured:

    • AUC0-t (mg/L*h) after Dose 1
    • AUC0-I (mg/L*h) after Dose 1
    • AUC0-I (mg/L*h) -Normalized- after Dose 1
    • AUC0-t (mg/L*h) after Dose 2
    • AUC0-I (mg/L*h) after Dose 2
    • AUC0-I (mg/L*h) -Normalized- after Dose 2

    Measured: 0, 1, 2, 3, 4, 6, 8, 12, 24, 48, 72, 96 hours post-dose

  5. Pharmacokinetics (PK) Evaluation of INM005 (Elimination Half-time)

    INM005 product concentration in serum at different time points after dosing. The following PK parameters were measured:

    • Elimination half-time (hs) after Dose 1
    • Elimination half-time (hs) after Dose 2
    • Mean Residence Time (hs) after Dose 1

    Measured: 0, 1, 2, 3, 4, 6, 8, 12, 24, 48, 72, 96 hours post-dose

  6. Pharmacokinetics (PK) Evaluation of INM005 (Elimination Rate)

    INM005 product concentration in serum at different time points after dosing. The following PK parameters were measured:

    • Elimination rate after Dose 1
    • Elimination rate after Dose 2

    Measured: 0, 1, 2, 3, 4, 6, 8, 12, 24, 48, 72, 96 hours post-dose

  7. Pharmacokinetics (PK) Evaluation of INM005 (Distribution Volume)

    INM005 product concentration in serum at different time points after dosing. The following PK parameters were measured:

    • Distribution Volume (L) after Dose 1

    Measured: 0, 1, 2, 3, 4, 6, 8, 12, 24, 48, 72, 96 hours post-dose

  8. Pharmacokinetics (PK) Evaluation of INM005 (Weight-adjusted Distribution Volumen)

    INM005 product concentration in serum at different time points after dosing. The following PK parameters were measured:

    • Weight-adjusted Distribution volumen (L/kg) after Dose 1

    Measured: 0, 1, 2, 3, 4, 6, 8, 12, 24, 48, 72, 96 hours post-dose

  9. Time to Progression of Disease

    Time to achieve decrease in at least 2 categories on the 8-point WHO ordinal scale of clinical status.

    Time to discharge (days).

    Time to intensive care unit (ICU) discharge (days).

    Measured: 28 days

  10. Clinical Improvement at Day 7 and Day 14

    Percentage of patients who present a decrease in at least 2 categories on the 8-point WHO ordinal scale of clinical status at 7 and 14 days after the start of the treatment.

    Measured: up to 2 weeks

  11. Patients Discharged at 28 Days

    Rate of discharged patients at 28 days

    Measured: up to 4 weeks

  12. Participants Who Require (ICU) Hospitalization

    Cumulative percentage of patients who require Intensive care unit (ICU) hospitalization

    Measured: up to 4 weeks

  13. Participants Who Require Mechanical Ventilation Assistance (MVA)

    Rate of participants who require Mechanical ventilation assistance

    Measured: up to 4 weeks

  14. Mortality at Day 28

    Mortality rate due to complications from COVID-19 at day 28

    Measured: up to 4 weeks

  15. Changes in Viral Load

    Percentage of participants with detectable viral load at baseline, day 7 and day 21 after the start of the treatment..

    GeneFinder ™ COVID-19 PLUS RealAmp Kit was used for detection of COVID-19 virus through reverse Transcription and Real-Time Polymerase Chain Reaction from RNA extracted from Respiratory specimens such as throat swab.

    This product can qualitatively detect COVID-19 using One-Step Reverse Transcription Real-Time polymerase chain reaction to confirm the presence of SARS-COV-2 by amplification of the genes RdRp (RNA-dependent RNA polymerase), E (Envelope) and N (Nucleocapsid).

    Measured: up to 3 weeks

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted31 Jul 2020
  2. Study start27 Jul 2020
  3. Primary completion23 Nov 2020
  4. Study completion30 Dec 2020

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2/3
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Sequential
Model description
This study will be an adaptive phase 2/3 investigation. First, 12 subjects will be randomly assigned to receive 1 of the 2 treatment regimens (study drug or placebo) in a 1:1 ratio. After the first 6 subjects have been enrolled and have completed 24 hours post treatment of 2nd dose, the IDMC will review the safety data and will inform whether to continue with staggered enrollment. Randomization ratio for subjects in the following stage will be 1:1. The independent data monitoring committee (IDMC) will review safety data after 12, 24, 48 and 96 patients have been enrolled in each arm. The study will then enroll a total of 121 patients in each arm. An interim analysis will be performed after 80% of recruitment has been reached (n=194). The IDMC will analyze the rate of events in the group under "standard of care".
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
243 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04494984
Sponsor's protocol ID
CT-INM005-01
Status last verified
Apr 2024
First submitted
29 Jul 2020
Last updated
20 Apr 2026
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Publications

  • Kreuzberger N, Hirsch C, Chai KL, Tomlinson E, Khosravi Z, Popp M, Neidhardt M, Piechotta V, Salomon S, Valk SJ, Monsef I, Schmaderer C, Wood EM, So-Osman C, Roberts DJ, McQuilten Z, Estcourt LJ, Skoetz N. SARS-CoV-2-neutralising monoclonal antibodies for treatment of COVID-19. Cochrane Database Syst Rev. 2021 Sep 2;9(9):CD013825. doi: 10.1002/14651858.CD013825.pub2.

    PubMed 34473343
  • Piechotta V, Iannizzi C, Chai KL, Valk SJ, Kimber C, Dorando E, Monsef I, Wood EM, Lamikanra AA, Roberts DJ, McQuilten Z, So-Osman C, Estcourt LJ, Skoetz N. Convalescent plasma or hyperimmune immunoglobulin for people with COVID-19: a living systematic review. Cochrane Database Syst Rev. 2021 May 20;5(5):CD013600. doi: 10.1002/14651858.CD013600.pub4.

    PubMed 34013969
  • Lopardo G, Belloso WH, Nannini E, Colonna M, Sanguineti S, Zylberman V, Munoz L, Dobarro M, Lebersztein G, Farina J, Vidiella G, Bertetti A, Crudo F, Alzogaray MF, Barcelona L, Teijeiro R, Lambert S, Scublinsky D, Iacono M, Stanek V, Solari R, Cruz P, Casas MM, Abusamra L, Luciardi HL, Cremona A, Caruso D, de Miguel B, Lloret SP, Millan S, Kilstein Y, Pereiro A, Sued O, Cahn P, Spatz L, Goldbaum F; INM005 Study Group. RBD-specific polyclonal F(ab )2 fragments of equine antibodies in patients with moderate to severe COVID-19 disease: A randomized, multicenter, double-blind, placebo-controlled, adaptive phase 2/3 clinical trial. EClinicalMedicine. 2021 Apr;34:100843. doi: 10.1016/j.eclinm.2021.100843. Epub 2021 Apr 11.

    PubMed 33870149

Questions about this trial

What is this clinical trial studying?

A Phase 2/3 study testing INM005 in people with COVID-19, run by Inmunova S.A. at 19 sites in Argentina.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 6 inclusion and 7 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 20 Apr 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 19 sites in Argentina. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this combined phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 20 Apr 2026). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Number of Participants With Improvement in at Least Two Categories in WHO 8-point Ordinal Clinical Scale at Day 28 or Discharge (time frame: Discharge or up to Day 28). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT04494984, which also lists 3 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 20 Apr 2026.

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