A Study for Efficacy and Safety of Live Biotherapeutic MRx4DP0004 to Treat COVID-19
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ClinicalTrials.gov Identifier: NCT04363372 |
Recruitment Status :
Withdrawn
(Recruitment Issues)
First Posted : April 27, 2020
Last Update Posted : June 16, 2021
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This is a randomised, double-blind, placebo controlled study to evaluate the efficacy and safety of MRx-4DP0004 in patients with COVID-19.
90 hospitalised patients will be enrolled and randomised (2:1) to receive MRx-4DP0004 or placebo for up to 14 days.
MRx-4DP0004 is an immunomodulating Live Biotherapeutic Product (LBP) which is expected to prevent or reduce the hyperinflammatory response to SARS-CoV-2 infection without impairing viral clearance.
Condition or disease | Intervention/treatment | Phase |
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COVID-19 | Drug: MRx-4DP0004 Drug: Placebo | Phase 2 |
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 0 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Masking: | Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor) |
Primary Purpose: | Treatment |
Official Title: | A Pilot, Multiple Dose Study to Evaluate the Efficacy and Safety of MRx-4DP0004 in Hospitalised Patients With Symptoms of COVID-19 (SARS-CoV-2 Infection) |
Estimated Study Start Date : | August 2020 |
Estimated Primary Completion Date : | December 2020 |
Estimated Study Completion Date : | January 2021 |

Arm | Intervention/treatment |
---|---|
Experimental: MRx-4DP0004
Patients receiving standard of care will add MRx-4DP0004 to their treatment. MRx-4DP0004 is taken as 2 capsules, twice a day for 14 days. Daily dose is 4 x 10^9 to 4 x10^10 colony forming units.
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Drug: MRx-4DP0004
MRx-4DP0004 is a lyophilised formulation of a proprietary strain of bacteria. |
Placebo Comparator: Placebo
Patients receiving standard of care will also take 2 placebo capsules, twice a day for 14 days.
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Drug: Placebo
Placebo capsules will be identical in appearance to active product. |
- Change in mean clinical status score in each treatment arm [ Time Frame: Baseline to Day 42 ]Clinical status score will be measured using the WHO Ordinal Scale for Clinical Improvement where patients are scored on a scale of 0-8 with 0 being uninfected and 8 being dead
- Number of adverse events in each treatment arm [ Time Frame: Baseline to Day 42 ]Safety and tolerability will be determined according to clinically relevant reported adverse events
- Number of patients with an improvement in clinical status score in each treatment arm [ Time Frame: Day 1 to Day 42 ]Point changes in clinical status score will be measured using the WHO Ordinal Scale for Clinical Improvement
- Number of patients with a deterioration in clinical status score in each treatment arm [ Time Frame: Day 1 to Day 42 ]Point changes in clinical status score will be measured using the WHO Ordinal Scale for Clinical Improvement
- Number of patients with at least 95% oxygen saturation on room air in each treatment arm [ Time Frame: Day 1 to Day 14 ]Oxygen saturation will be measured as per local standard procedures
- Time to patients with at least 95% oxygen saturation on room air in each treatment arm [ Time Frame: Day 1 to Day 14 ]Oxygen saturation will be recorded daily during hospitalisation to determine the mean time for each arm to reach at least 95% saturation
- Number of patients with an improvement in the National Early Warning Score (NEWS) 2 in each treatment arm [ Time Frame: Day 1 to Day 14 ]The NEWS 2 is based on aggregate scoring of physiological measurements including respiration rate, oxygen saturation, systolic blood pressure, pulse rate, level of consciousness and temperature
- Number of patients with an deterioration in the National Early Warning Score (NEWS) 2 in each treatment arm [ Time Frame: Day 1 to Day 14 ]The NEWS 2 is based on aggregate scoring of physiological measurements including respiration rate, oxygen saturation, systolic blood pressure, pulse rate, level of consciousness and temperature
- Number of patients requiring Continuous Positive Airway Pressure in each treatment arm [ Time Frame: Day 1 to Day 14 ]Details of required respiratory support will be recorded throughout hospitalisation
- Number of patients requiring Intermittent Positive Pressure Ventilation in each treatment arm [ Time Frame: Day 1 to Day 14 ]Details of required respiratory support will be recorded throughout the treatment period
- Time to patients requiring Continuous Positive Airway Pressure in each treatment arm [ Time Frame: Day 1 to Day 14 ]Details of required respiratory support will be recorded throughout the treatment period
- Time to patients requiring Intermittent Positive Pressure Ventilation in each treatment arm [ Time Frame: Day 1 to Day 14 ]Details of required respiratory support will be recorded throughout the treatment period
- Time to discharge in each treatment arm [ Time Frame: Day 1 to Day 42 ]Length of hospital stay will be compared
- Number of deaths in each treatment arm [ Time Frame: Day 1 to Day 42 ]All cause mortality will be compared

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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:
- Willing and able to sign the consent form
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Suspected or confirmed COVID-19 as defined by:
- Positive RNA test for SARS-CoV-2 OR
- Presenting with symptoms of COVID-19 as determined by the investigator, and
- A score of 4 or 5 on the WHO Ordinal Scale for Clinical Improvement, and
- Oxygen saturation of <95% on room air, and
- Chest X-ray with evidence of COVID-19 e.g. ground-glass opacities
- Requires admission to hospital
- Able to swallow oral capsules
Exclusion Criteria:
- Known valvular heart defects, pulmonary hypertension or heart failure
- Known to have cystic fibrosis
- GI fistula or malabsorption syndrome
- Known allergy to ampicillin, clindamycin and imipenem
- Any other condition which, in the opinion of the investigator, would prevent full participation in the study or would interfere with the evaluation of the study endpoints
- Antibiotic treatment at enrolment or within 2 days prior
- Pregnant or breastfeeding females
- Unable or unwilling to follow contraception requirements
- Concurrent participation in another interventional clinical trial at enrolment or within 30 days prior

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): NCT04363372
United Kingdom | |
University Hospitals Plymouth NHS Trust | |
Plymouth, United Kingdom |
Principal Investigator: | Dinesh Saralaya, MBBS, MD, MRCP, FRCP | Bradford Royal Infirmary |
Responsible Party: | 4D pharma plc |
ClinicalTrials.gov Identifier: | NCT04363372 |
Other Study ID Numbers: |
MRx-4DP0004-II-001 |
First Posted: | April 27, 2020 Key Record Dates |
Last Update Posted: | June 16, 2021 |
Last Verified: | June 2020 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | No |
Studies a U.S. FDA-regulated Device Product: | No |
MRx-4DP0004 Coronavirus Live Biotherapeutic Product SARS-CoV-2 Immunomodulatory |
COVID-19 Pneumonia, Viral Pneumonia Respiratory Tract Infections Infections Virus Diseases |
Coronavirus Infections Coronaviridae Infections Nidovirales Infections RNA Virus Infections Lung Diseases Respiratory Tract Diseases |