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Investigational Therapeutics for the Treatment of People With Ebola Virus Disease

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT03719586
Recruitment Status : Completed
First Posted : October 25, 2018
Results First Posted : September 8, 2021
Last Update Posted : September 8, 2021
Information provided by (Responsible Party):
National Institutes of Health Clinical Center (CC) ( National Institute of Allergy and Infectious Diseases (NIAID) )

Brief Summary:


Ebola virus can cause serious illness or death. No medicines are approved to treat it. Researchers need to test new medicines to see if they help people recover from Ebola and are safe to give. They need to test the drugs and compare them in a controlled way. Researchers want to test 4 drugs with people who have Ebola and are in treatment centers.


To study the safety and effectiveness of 4 drugs for people with Ebola virus.


People of any age with Ebola infection who are in treatment centers


Participants will be screened with questions, medical history, and blood tests.

Participants will be randomly assigned to get 1 of 3 study drugs:

  • ZMapp by IV over about 4 hours. It will be given 3 times, 3 days apart.
  • Remdesivir by IV over about 1 hour. It will be given once a day for 10 days.
  • Mab114 by IV for 30-60 minutes. It will be given 1 time.
  • REGN-EB3 by IV for about 2 hours. It will be given 1 time.

For at least a week, participants will stay in isolation in a clinic. They will:

  • Get supportive care and be monitored
  • Have a small plastic tube (IV) put in an arm vein for several days to give fluids and collect blood.
  • Get their study drug.
  • Be monitored for disease signs and drug side effects. They may get medicines for side effects.
  • Have blood and urine tests.

Participants will stay in the clinic until they finish the study drug and are well enough to leave.

Participants will have 2 follow-up visits over 2 months. They will answer questions and give blood and semen samples.


Condition or disease Intervention/treatment Phase
Ebola Virus Drug: ZMapp Drug: Remdesivir Drug: MAb114 Drug: REGN-EB3 Phase 2 Phase 3

Detailed Description:

Species Zaire ebolaviruses (EBOV) are members of the Filoviridae and are known primarily as the underlying cause of severe viral hemorrhagic fevers with disturbingly high case fatality rates. Between 1994 and the present, there have been many filovirus outbreaks affecting mostly central Africa, with 2 large outbreaks in 1995 in Kikwit, Democratic Republic of Congo (DRC), and in Gulu, Uganda in 2000-2001. The 2013-2016 West African outbreak significantly exceeded all previous outbreaks in geographic range, number of patients affected, and in disruption of typical activities of civil society. In 2018 there have been two additional outbreaks of EBOV infection, both in the Democratic Republic of the Congo and constituting the 9th and 10th recorded outbreaks of this infection in that country. The 10th outbreak is currently ongoing in the DRC as of December 2018 and has raised great concern because of the potential to expand greatly in scope and to spread to surrounding regions.

It has been suggested that one of the most important elements necessary to improve survival from Ebola virus infection is the provision of supportive care inclusive of hemodynamic support in the form of aggressive fluid replacement, ability to diagnose and correct severe metabolic derangements, early treatment of sepsis, and other standards of modern medical care. A small number of investigational therapeutics have been developed as putative antiviral strategies for treating this infection. Unfortunately, phase 1/2 data supporting the safety and efficacy of these agents are often limited, and thus there remains some degree of equipoise as to which of these interventions should be prioritized in the treatment of severe infection. The triple monoclonal antibody product ZMapp was studied through a randomized controlled trial (RCT) in the 2014-2016 West African outbreak and remains perhaps the best characterized of the available investigational products, but the end of that outbreak forced the RCT to close prior to crossing pre-specified evidentiary boundaries.

A WHO Research and Development Ebola Therapeutics Committee has agreed that, given the lethality of Ebola virus and the combination of human and non-human primate (NHP) efficacy data for ZMapp, either ZMapp+oSOC or oSOC alone could potentially be positioned as the control arm in comparative trials depending upon the preferences of the host countries. The DRC has chosen to use ZMapp + oSOC in the current protocol. However, both the nature and number of control and invegstigational arms may change over the course of the trial. Such changes would require protocol amendments.

This multicenter, multi-outbreak, randomized controlled trial will study the comparative safety and efficacy of additional investigational therapeutics compared to ZMapp in patients with known EBOV disease (Zaire) receiving oSOC. The primary endpoint of this comparison will be mortality by Day 28, with a number of secondary endpoints also planned that should generate important knowledge about the safety, ease of administration, and antiviral activity of all of these investigational interventions.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 681 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: A Multicenter, Multi-Outbreak, Randomized, Controlled Safety and Efficacy Study of Investigational Therapeutics for the Treatment of Patients With Ebola Virus Disease
Actual Study Start Date : November 21, 2018
Actual Primary Completion Date : September 9, 2019
Actual Study Completion Date : August 18, 2020

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: A
Remdesivir plus optimized Standard of Care (oSOC)
Drug: Remdesivir
Administered intravenously with a loading dose on Day 1 (200 mg for adults and pediatric patients with body weight >= 40 kg and for pediatric patients weighing < 40 kg one loading dose of remdesivir 5 mg/kg) followed by 9 to 13 days of once-daily maintenance dosing starting on Day 2 and extending through Day 10 to 14 (100 mg for adults and pediatric patients with body weight >= 40 kg and for pediatric patients weighing < 40 kg remdesivir 2.5 mg/kg)

Experimental: B
MAb114 plus optimized Standard of Care (oSOC)
Drug: MAb114
50 mg/kg of body weight administered intravenously on Day 1 as a single infusion

Experimental: C
REGN-EB3 plus optimized Standard of Care (oSOC)
Drug: REGN-EB3
150 mg/kg of body weight administered intravenously on Day 1 as a single infusion

Experimental: Control
Zmapp plus optimized Standard of Care (oSOC)
Drug: ZMapp
Three doses of 50 mg/kg of body weight administered intravenously every third day beginning on Day 1

Primary Outcome Measures :
  1. Mortality [ Time Frame: 28 days ]
    Number of Participants with Mortality by Day 28

Secondary Outcome Measures :
  1. Time in Days to First Negative Ebola Virus RT-PCR in Blood. [ Time Frame: up to Day 28 ]
    This was a measure of the median number of days that it took for the serum PCR to first turn negative after having been positive throughout the patient's earlier course.

  2. Viremia as Determined by CTnp Values on PCR [ Time Frame: Days 1, 2, 3, 4, 6, 8, 10, 14, and 28. ]

    These are the median CTnp pCR values measured serially on the 4 treatment arms as per protocol.

    caveats: Undetectable ctNP values are imputed as ctNP=45.0 (the limit of detection). Missing values (due to gaps in sample collection, discharge, or death) are handled by carrying forward the last observation.

    The Day 28 visit includes a ±7-day visit window. The priority for defining the ctNP value for this timepoint, according to days post-randomization, is: 28, 27, 29, 26, 30, 25, 31, 24, 32, 23, 33, 22, 34, 21. For example, the ctNP result from the sample collected 26 days post-randomization will only be used for this timepoint if there are no sample results for 28, 27, or 29 days post-randomization.

  3. Incidence of Serious Adverse Events/AEs [ Time Frame: up to Day 58 ]
    The number of Serious Adverse Events that were tentatively ascribed to one of the four treatment arms by the site investigator and, upon extensive further review and adjudication by an independent Pharmacovigilance committee, were still felt potentially attributable to study drug as opposed to the underlying Ebola infection.

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   up to 99 Years   (Child, Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
  • Males or females of any age with documented positive RT-PCR in blood for acute Ebola virus infection within 3 days prior to enrollment and who have symptoms of any duration.
  • Willingness of study participant to accept randomization to any assigned treatment arm.
  • All males and females of childbearing potential must be willing to use effective methods of contraception, from time of enrollment until Day 58 of study.
  • Must agree not to enroll in another study of an investigational agent prior to completion of Day 28 of study.
  • Ability to provide informed consent personally, or by a legally acceptable representative if the patient is unable to do so.


  • Patients who, in the judgment of the investigator, will be unlikely or unable to comply with the requirements of this protocol through Day 28.
  • Prior treatment with any investigational antiviral drug therapy against Ebola virus infection within 5 half-lives or 30 days, whichever is longer, prior to enrollment. (Patients who have received an experimental (or, in future, potentially a licensed) immunization against Ebola virus remain eligible.)

Information from the National Library of Medicine

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 identifier (NCT number): NCT03719586

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United States, Maryland
National Institutes of Health Clinical Center
Bethesda, Maryland, United States, 20892
Congo, The Democratic Republic of the
Ebola Treatment Centers throughout the DRC
Kinshasa Gombe, Congo, The Democratic Republic of the
Sponsors and Collaborators
National Institute of Allergy and Infectious Diseases (NIAID)
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Principal Investigator: Richard T Davey, M.D. National Institute of Allergy and Infectious Diseases (NIAID)
  Study Documents (Full-Text)

Documents provided by National Institutes of Health Clinical Center (CC) ( National Institute of Allergy and Infectious Diseases (NIAID) ):
Additional Information:
Publications automatically indexed to this study by Identifier (NCT Number):
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Responsible Party: National Institute of Allergy and Infectious Diseases (NIAID) Identifier: NCT03719586    
Other Study ID Numbers: 190003
First Posted: October 25, 2018    Key Record Dates
Results First Posted: September 8, 2021
Last Update Posted: September 8, 2021
Last Verified: November 2020

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by National Institutes of Health Clinical Center (CC) ( National Institute of Allergy and Infectious Diseases (NIAID) ):
Viral Hemorrhagic Fever
Ebola Treatment Center
Zaire Ebola Virus
Additional relevant MeSH terms:
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Hemorrhagic Fever, Ebola
Virus Diseases
Hemorrhagic Fevers, Viral
RNA Virus Infections
Filoviridae Infections
Mononegavirales Infections
Atoltivimab, maftivimab, and odesivimab-ebgn drug combination
Molecular Mechanisms of Pharmacological Action
Antiviral Agents
Anti-Infective Agents