ClinicalTrials.gg
TerminatedNCT04417257RESOLUTIONUpdated Nov 13, 2025Results posted

Study of LAU-7b for the Treatment of Coronavirus Disease 2019 (COVID-19) Disease in Adults

A Phase 2/3 interventional study of LAU-7b and Placebo oral capsule in COVID-19 Disease, sponsored by Laurent Pharmaceuticals Inc.. Terminated at 29 sites in 2 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-11-13.

Sponsored by Laurent Pharmaceuticals Inc. · Phase 2/3, Interventional, and Treatment

Why this study was terminated
Phase 2 completed normally, Phase 3 terminated for futility due to lack of aggravation events.
Phase
Phase 2/3
Study type
Interventional
Enrollment
351
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

A randomized, double-blind, placebo-controlled Phase 2/3 Study of LAU-7b against confirmed COVID-19 Disease in hospitalized patients at a higher risk of complications.

Read the detailed description

RESOLUTION is a multicenter, randomized, double-blind, placebo-controlled Phase 2/3 study of LAU-7b for the treatment of COVID-19 Disease in participants at a higher risk than the general COVID-19 Disease population to develop complications while hospitalized.

The goal of the study is to evaluate the efficacy of LAU-7b therapy + standard-of-care relative to placebo + standard-of-care in participants with COVID-19 Disease with confirmed SARS-CoV-2 infection. SARS is "severe acute respiratory syndrome". CoV is " Coronavirus".

The purpose of the treatment with LAU-7b is to prevent the worsening of the health of hospitalized participants including aggravation such as recourse to mechanical ventilation and death.

The means are the direct effects of LAU-7b on the resolution of inflammation, interference with viral proliferation and protection from excessive pro-inflammatory response.

02

Conditions studied

  • COVID-19 Disease

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Keywords

  • Inflammation
  • Antiviral
  • Host-directed treatment
  • Docosahexaenoic acid
  • Pro-resolving
03

In context

Inflammation

3,536 studies on the registry are indexed under Inflammation; 642 are open to participants now.

This study's enrollment of 351 is above the median of 50 across 2,577 interventional studies indexed under Inflammation.

Browse Inflammation studies →

Lead sponsor

Laurent Pharmaceuticals Inc. is the lead sponsor of 3 studies on the registry; none are open to participants now.

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

04

Who can participate

Ages eligible
18 Years and older
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

  1. Participant exhibited symptoms [Extension Phase 3 study only: (including at least one lower respiratory symptom such as shortness of breath or dyspnea)] of COVID-19 disease at screening and/or since the start of their hospitalization (may have included treated symptoms)
  2. Participant was 18 years and older, of either gender
  3. Participant must have had at least one of the following factors/co-morbidities:

    1. Controlled or uncontrolled diabetes
    2. Pre-existing cardiovascular disease, including hypertension
    3. Pre-existing respiratory disease such as (COPD), asthma, emphysema
    4. Active [Extension Phase 3 study only: or a former smoker] with 20 pack-years of smoking history
    5. Obesity as depicted by ≥30 kg/m2
    6. Laboratory tests indicative of a higher risk of COVID-19-related complications, such as troponin >1.5 the (ULN), [Extension Phase 3 study only: D-dimer >3.0 ULN] and/or C reactive protein (CRP) >1.5 ULN
    7. Aged 70 years and older who, based on the judgment of the investigator, was at a higher risk of developing complications
  4. Participant had a documented positive test for the SARS-CoV-2 virus [Pilot Phase 2 study only: or was suspected to be positive and with a test result pending]. [Extension Phase 3 study only: Co-infection with other viral respiratory infections was allowed and had to be documented in medical history]
  5. Participant was under observation by, or admitted to, a controlled facility or hospital [Extension Phase 3 study only: for no more than 48 hours (72 hours from amendment 3 onwards) before screening, including any prior stay in another hospital] to receive standard of care (SoC) for COVID-19 disease
  6. [Pilot Phase 2 study only: Participant's hs was 3, 4, or 5 on the WHO ordinal scale and not previously a "6"] [Extension Phase 3 study only: 3 or 4 on the World Health Organization (WHO) ordinal scale and not previously a "5 or a 6"]
  7. If female, participant was either (one year or greater without menses), surgically sterile, or, for female subjects of who were capable of conception had to be practicing a highly effective method of (acceptable methods included intrauterine device, complete abstinence, spermicide + barrier, male partner surgical sterilization, or hormonal contraception) during the study and through 30 days after the last dose of the study medication. Periodical abstinence was not classified as an effective method of birth control. A pregnancy test had to be negative at the Screening Visit
  8. Participant had the ability to understand and give , which could have been verbal with a witness, according to local requirements
  9. Participant was deemed capable of adequate compliance including attending scheduled visits for the duration of the study
  10. Participant was able to swallow the study drug capsules

Exclusion criteria

Exclusion Criteria:

  1. Pregnancy or breastfeeding
  2. Health condition deemed to possibly interfere with the study endpoints and/or the safety of the participants. For example, the following conditions were considered for participation in the study, but this was not an exhaustive list. In case of doubt, the investigator was to consult with the Sponsor's medical representative:

    1. Presence of inherited retinitis pigmentosa
    2. Presence or history of liver failure ( B or C)
    3. Presence or history of stage 4 severe chronic kidney disease or dialysis requirement
    4. Febrile neutropenia
    5. [Pilot Phase 2 study: Presence of active cancer treated with systemic chemotherapy or radiotherapy][Extension Phase 3 study: Presence of end-stage cancer]
  3. Known history of a severe allergy or sensitivity to retinoids, or with known allergies to in the oral capsule formulation used in the study
  4. Participation in another drug clinical trial within 30 days (or a minimum of 5 t½) prior to screening, except ongoing participation in non-interventional studies
  5. Calculated (CrCl), using the Cockroft-Gault equation for example [Pilot Phase 2 study: \<60 mL/min] [Extension Phase 3 study: \<30 mL/min)]
  6. Presence of total >1.5 x (in the absence of demonstrated Gilbert's syndrome), (ALT) and/or aspartate aminotransferase (AST) >2.5 x ULN
  7. [Extension Phase 3 study only: Subject expected to be transferred to ICU or die in the next 24 hours]
Terms in these criteria, in plain language(13)

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.

COPD

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

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

Postmenopausal

Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

Child-Pugh class

A score of how well the liver works in people with liver disease such as cirrhosis: class A is mild, B moderate and C severe.

Excipients

The other ingredients in a medicine besides the active drug, such as fillers, colours or preservatives.

Creatinine clearance (CrCl)

How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.

Bilirubin

A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.

Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

05

Study design

Phase
Phase 2 / Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
351 participants (actual)

Study arms

  • Experimental
    LAU-7b

    Active drug as LAU-7b capsules

    Drug: LAU-7b

  • Placebo comparator
    Placebo

    Placebo oral capsule (as inactive capsules identical to active arm)

    Drug: Placebo oral capsule

Interventions

  • DrugLAU-7b

    LAU-7b will be administered orally once-a-day with the main meal of the day, if possible, for a total of up to 14 days.

    Also known as: fenretinide

  • DrugPlacebo oral capsule

    Placebo will be administered orally once-a-day with the main meal of the day, if possible, for a total of up to 14 days.

06

What researchers measure

Primary outcomes

  1. Primary Outcome for Phase 2: Proportion of Participants Alive and Free of Respiratory Failure by Day 29 (Ordinal Scale Scores 1-4, Inclusively)

    This will be assessed through health status scoring using the WHO 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

    Time frame: On Day 29

  2. Primary Outcome for Phase 3: Proportion of Participants Requiring Mechanical Ventilation (Includes Extra-corporeal Membrane Oxygenation - ECMO) AND/OR Deceased (All Causes) by Day 60 (Ordinal Scale Scores 1-4, Inclusively)

    This will be assessed through health status scoring using the WHO 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

    Time frame: By Day 60

Secondary outcomes

  1. The Safety of LAU-7b Therapy, Overview.

    This will be assessed through monitoring of treatment emergent adverse events and serious adverse events, vital signs including oxygen saturation and body temperature, symptom-directed physical examinations and safety laboratory tests.

    Time frame: From baseline to Day 60

  2. The Safety of LAU-7b Therapy, Display of TEAEs With Incidence Equal or Greater Than 10% in Either Treatment Group

    This will be assessed through monitoring of treatment emergent adverse events and serious adverse events, vital signs including oxygen saturation and body temperature, symptom-directed physical examinations and safety laboratory tests.

    Time frame: From baseline to Day 60

  3. Health Status of the Participant on the 7-point Ordinal Scale on Days 14 and 29, Compared Between Active and Placebo Groups.

    The health status was graded using the World Health Organization 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

    Time frame: On Days 14 and 29

  4. For Phase 2 Portion: Rate of All-causes Death by Day 29, Depicted by a Change From Baseline in the Ordinal Scale Score to Category 7

    This was assessed with Day 29 (and Day 60, presented separately) Health Status grading using the World Health Organization 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

    Time frame: On Day 29

  5. For Phase 3 Portion: Rate of All-causes Death by Day 29, Depicted by a Change From Baseline in the Ordinal Scale Score to Category 7

    This was assessed with Day 29 (and Day 60, presented separately) Health Status grading using the World Health Organization 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

    Time frame: On Day 29

  6. For Phase 2 Portion: Rate of All-causes Death By Day 60, Depicted by a Change From Baseline in the Ordinal Scale Score to Category 7

    This was assessed with Day 60 (and Day 29, presented separately) Health Status grading using the World Health Organization 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

    Time frame: On Day 60

  7. For Phase 3 Portion: Rate of All-causes Death By Day 60, Depicted by a Change From Baseline in the Ordinal Scale Score to Category 7

    This was assessed with Day 60 (and Day 29, presented separately) Health Status grading using the World Health Organization 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

    Time frame: On Day 60

  8. Proportion of Participants Alive and Free of Respiratory Failure by Day 29 (Ordinal Scale Scores 1-4, Inclusively)

    This will be assessed through health status scoring using the WHO 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

    Time frame: Day 29

  9. For Phase 2 Portion: Rate of COVID-19 Disease-related Aggravation, Depicted by a Change From Baseline in the Ordinal Scale Score of at Least One Category

    This was assessed through daily health status scoring using the World Health Organization 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

    Time frame: From baseline to Day 60

  10. For Phase 3 Portion: Rate of COVID-19 Disease-related Aggravation, Depicted by a Change From Baseline in the Ordinal Scale Score of at Least One Category

    This was assessed through daily health status scoring using the World Health Organization 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

    Time frame: From baseline to Day 60

  11. For Phase 2 Only: Rate of COVID-19 Disease-related Transfer to Intensive Care Unit, Depicted by a Change From Baseline in the Ordinal Scale Score to Categories 5 or 6.

    This was assessed through daily health status scoring using the World Health Organization 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

    Time frame: From baseline to Day 60

  12. For Phase 2 Only: Rate of COVID-19 Disease-related Transfer to Mechanical Ventilation, Depicted by a Change From Baseline in the Ordinal Scale Score to Category 6

    This was assessed through daily health status scoring using the World Health Organization 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

    Time frame: From baseline to Day 60

  13. For Phase 2 Only: Mean Change From Baseline of the Ordinal Scale Patient Health Status as a Function of Assessment Time.

    This was assessed through daily health status scoring using the World Health Organization 7-point Ordinal Scale (below), a higher score is worse than a low score. Outcome measure data are counts of participants with a given change from baseline in number of categories, by treatment group. The mean change from baseline is compared between treatment groups. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

    Time frame: From baseline to Day 60

  14. For Phase 2 Only: Time to a Participant's Improvement of at Least One Category on the Ordinal Scale Health Status.

    This was assessed through daily health status scoring using the World Health Organization 7-point Ordinal Scale (below), a higher score is worse than a low score. If health status was not improved (remains stable or aggravates) by Day 60, it was censored at Day 60. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

    Time frame: From baseline to Day 60

  15. For Phase 2 Portion: Time to Recovery, Defined as the Time to Reach Categories 2 or 1 on the Ordinal Scale Participant Health Status (First Occurrence if More Than Once).

    This was assessed through daily health status scoring using the World Health Organization 7-point Ordinal Scale (below), a higher score is worse than a low score. If health status did not reach categories 2 or 1 by Day 60, it was censored at Day 60. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

    Time frame: From baseline to Day 60

  16. For Phase 3 Portion: Time to Recovery, Defined as the Time to Reach Categories 2 or 1 on the Ordinal Scale Participant Health Status (First Occurrence if More Than Once).

    This was assessed through daily health status scoring using the World Health Organization 7-point Ordinal Scale (below), a higher score is worse than a low score. If health status did not reach categories 2 or 1 by Day 60, it was censored at Day 60. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

    Time frame: From baseline to Day 60

  17. For Phase 2 Only: Time to Mechanical Ventilation, Defined Here as Time to Reach Category 6 on the Ordinal Scale Participant Health Status.

    This was assessed through daily health status scoring using the World Health Organization 7-point Ordinal Scale (below), a higher score is worse than a low score. If category 6 was skipped and the subject died (category 7), it was considered an event. Subjects with missing observations were censored at their last available assessment if they did not need mechanical ventilation while on study. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

    Time frame: From baseline to Day 60

  18. For Phase 2 Only: Time to Death, Defined Here as a Time to Reach Category 7 on the Ordinal Scale Participant Health Status, Censored to Day 60 if it Happens Later Than Day 60

    This was assessed through daily health status scoring using the World Health Organization 7-point Ordinal Scale (below), a higher score is worse than a low score. It was censored to Day 60 if it happened later than Day 60, or at the last available visit where the subject was alive if no further ordinal scale health status. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

    Time frame: From baseline to Day 60

  19. For Phase 2 Portion: Duration of Hospitalization (Days) Within the Study Period Days 1-60

    Monitoring of the hospitalization. In case of re-hospitalization within Day 60 for a given participant, the additional hospitalization time was included. Hospitalization for more than 60 days was considered 60 days in the calculation.

    Time frame: From baseline to Day 60

  20. For Phase 3 Portion: Duration of Hospitalization (Days) Within the Study Period Days 1-60

    Monitoring of the hospitalization. In case of re-hospitalization within Day 60 for a given participant, the additional hospitalization time was included. Hospitalization for more than 60 days was considered 60 days in the calculation.

    Time frame: From baseline to Day 60

  21. For Phase 2 Only: Time to Attain an Undetectable Viral Load in Oropharyngeal Swabs.

    Intent was to compare median time to undetectable viral load between treatment groups, through oropharyngeal swabs done at specified times while hospitalized. However, almost all sites were unable to obtain serial samples until discharge of participants. Therefore, with only a handful of results (reported herein), it was not possible to estimate the time to undetectable viral load.

    Time frame: Until discharge of participants, up to Day 60

  22. The Change From Baseline in the Score Obtained on the EuroQol Five-dimensions Five-level (EQ-5D-5L) Quality-of-life Survey

    This will be assessed in person or remotely, in participants reaching Days 14, 29, 45 and 60 and able to fill the questionnaire. EQ-5D-5L value was calculated based on the EQ-5D-5L user guide, and a higher value indicated better health status. The upper anchor point, full health, was 1.0 and the minimum value was 0.0.

    Time frame: On Days 1, 14, 29, 45 and 60

07

Results

Posted Nov 13, 2025
Limitations and caveats
The Pilot Phase 2 was conducted prior to the Omicron variants and completed normally. Participants with Health Status 3 + 4 grouped together were further studied in a Phase 3 extension, conducted with Omicron variants and vaccination. The Phase 3 was terminated early for futility due to lack of aggravation events (primary efficacy endpoint). The Phase 3 SAP pre-specified the efficacy analyses performed under such a scenario.

Participant flow

The study was conducted in two distinct, sequential parts. The Pilot Phase 2 followed by a Phase 3 extension in a new group of subjects. The Pilot Phase 2 included 232 subjects from August 18, 2020 to July 15, 2021 and the Phase 3 extension included 119 subjects from January 28, 2022 to November 13, 2023.

Pilot Phase 2
Participant flow — Pilot Phase 2
MilestoneLAU-7bPlacebo
Started117115
Completed8991
Not completed2824
Withdrew: Adverse event20
Withdrew: Death1411
Withdrew: Lost to follow-up35
Withdrew: Withdrawal by subject76
Withdrew: Hepatic impairment10
Withdrew: Unblinding10
Withdrew: All other02
Phase 3 Extension
Participant flow — Phase 3 Extension
MilestoneLAU-7bPlacebo
Started5762
Completed4556
Not completed126
Withdrew: Death31
Withdrew: Lost to follow-up42
Withdrew: Patient withdrawal22
Withdrew: Study terminated by sponsor due to futility criteria reached31

Outcome measures

PrimaryPrimary Outcome for Phase 2: Proportion of Participants Alive and Free of Respiratory Failure by Day 29 (Ordinal Scale Scores 1-4, Inclusively)

This will be assessed through health status scoring using the WHO 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

Time frame:
On Day 29
Reported as:
Count of participants · Participants
Primary Outcome for Phase 2: Proportion of Participants Alive and Free of Respiratory Failure by Day 29 (Ordinal Scale Scores 1-4, Inclusively)
ParticipantsLAU-7b Phase 2Placebo Phase 2
ITT population, alive and free of respiratory failure. Missing data as failure.8183
Per-Protocol Population, alive and free of respiratory failure, no imputation6565
Health Status 3 + 4 at baseline alive and free of respiratory failure. Missing data as failure.6054
Health Status 5 at baseline alive and free of respiratory failure. Missing data as failure.2129
Health Status 3 + 4 at baseline with Day 29 data (no imputation)6054
Statistical analysis
  • LAU-7b Phase 2 vs Placebo Phase 2 · Fisher Exact · p = 0.7377 (one-sided (right tailed)) · Mean difference (final values): -2.9 · 95% CI -15 to 9A positive difference favours LAU-7b, a negative difference favours placebo.
  • LAU-7b Phase 2 vs Placebo Phase 2 · Fisher Exact · p = 1.000 (one-sided (right tailed)) · Mean difference (final values): -3.0 · 95% CI -10.0 to 2.8A positive difference favours LAU-7b, a negative difference favours placebo.
  • LAU-7b Phase 2 vs Placebo Phase 2 · Regression, Logistic · p = 0.0177 (À priori threshold for statistical significance is set at 0.1) · Odds ratio (or): 0.570 · 95% CI 0.359 to 0.907This P-value is for the baseline factor "Health Status at baseline". Other baseline factors not significant.
  • LAU-7b Phase 2 vs Placebo Phase 2 · Fisher Exact · p = 0.3537 (One-sided (right tailed)) · Mean difference (final values): 3.9 · 95% CI -10.2 to 18.2A positive difference favours LAU-7b, a negative difference favours placebo.
  • LAU-7b Phase 2 vs Placebo Phase 2 · Fisher Exact · p = 0.9590 (one-sided (right tailed)) · Mean difference (final values): -16.2 · 95% CI -36.6 to 5.4A positive difference favours LAU-7b, a negative difference favours placebo.
  • LAU-7b Phase 2 vs Placebo Phase 2 · Fisher Exact · p = 0.0553 (one-sided (right tailed)) · Mean difference (final values): 6.9 · 95% CI 0.4 to 17.1A positive difference favours LAU-7b, a negative difference favours placebo.
PrimaryPrimary Outcome for Phase 3: Proportion of Participants Requiring Mechanical Ventilation (Includes Extra-corporeal Membrane Oxygenation - ECMO) AND/OR Deceased (All Causes) by Day 60 (Ordinal Scale Scores 1-4, Inclusively)

This will be assessed through health status scoring using the WHO 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

Time frame:
By Day 60
Reported as:
Count of participants · Participants
Primary Outcome for Phase 3: Proportion of Participants Requiring Mechanical Ventilation (Includes Extra-corporeal Membrane Oxygenation - ECMO) AND/OR Deceased (All Causes) by Day 60 (Ordinal Scale Scores 1-4, Inclusively)
ParticipantsLAU-7b Phase 3Placebo Phase 3
ITT population with Day 60 data (no imputation)32
Per-Protocol Population, alive and free of respiratory failure, no imputation22
Statistical analysis
  • LAU-7b Phase 3 vs Placebo Phase 3 · Fisher Exact · p = 0.6600 (Two-sided test) · Mean difference (net): 2.7 · 95% CI -6.9 to 13.9A negative difference favours LAU-7b, a positive difference favours placebo.
  • LAU-7b Phase 3 vs Placebo Phase 3 · Fisher Exact · p = 1.000 (Two-sided test) · Mean difference (net): 0.5 · 95% CI -10.6 to 12.6A negative difference favours LAU-7b, a positive difference favours placebo.
SecondaryThe Safety of LAU-7b Therapy, Overview.

This will be assessed through monitoring of treatment emergent adverse events and serious adverse events, vital signs including oxygen saturation and body temperature, symptom-directed physical examinations and safety laboratory tests.

Time frame:
From baseline to Day 60
Reported as:
Number · participants
The Safety of LAU-7b Therapy, Overview.
participantsLAU-7b Phase 2Placebo Phase 2LAU-7b Phase 3Placebo Phase 3
Participants with TEAEs97944554
Participants with serious TEAEs23221213
Participants with at least possibly-related serious TEAEs0000
Participants with TEAEs with fatal outcome131131
Participants with TEAEs leading to treatment discontinuation221814
Participants with AE related to COVID-1962622828
Participants with suspected unexpected serious adverse reaction (SUSAR)0000
SecondaryThe Safety of LAU-7b Therapy, Display of TEAEs With Incidence Equal or Greater Than 10% in Either Treatment Group

This will be assessed through monitoring of treatment emergent adverse events and serious adverse events, vital signs including oxygen saturation and body temperature, symptom-directed physical examinations and safety laboratory tests.

Time frame:
From baseline to Day 60
Reported as:
Number · participants
The Safety of LAU-7b Therapy, Display of TEAEs With Incidence Equal or Greater Than 10% in Either Treatment Group
participantsLAU-7b Phase 2Placebo Phase 2LAU-7b Phase 3Placebo Phase 3
Dry skin2117712
Vision blurred182055
Diarrhea147310
Constipation101224
Dyspnea8786
Insomnia7447
Headache51225
Nausea4768
Cough0067
SecondaryHealth Status of the Participant on the 7-point Ordinal Scale on Days 14 and 29, Compared Between Active and Placebo Groups.

The health status was graded using the World Health Organization 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

Time frame:
On Days 14 and 29
Reported as:
Count of participants · Participants
Health Status of the Participant on the 7-point Ordinal Scale on Days 14 and 29, Compared Between Active and Placebo Groups.
ParticipantsLAU-7b Phase 2Placebo Phase2LAU-7b Phase 3Placebo Phase 3
Health Status on Day 14 — Health Status = 12100
Health Status on Day 14 — Health Status = 25524
Health Status on Day 14 — Health Status = 333322028
Health Status on Day 14 — Health Status = 448573326
Health Status on Day 14 — Health Status = 59403
Health Status on Day 14 — Health Status = 67700
Health Status on Day 14 — Health Status = 71100
Health Status on Day 14 — Missing Health Status data12821
Health Status on Day 29 — Health Status = 144423630
Health Status on Day 29 — Health Status = 235421120
Health Status on Day 29 — Health Status = 32021
Health Status on Day 29 — Health Status = 42304
Health Status on Day 29 — Health Status = 52000
Health Status on Day 29 — Health Status = 64100
Health Status on Day 29 — Health Status = 70000
Health Status on Day 29 — Missing Health Status data282787
Statistical analysis
  • LAU-7b Phase 2 vs Placebo Phase2 · Wilcoxon (Mann-Whitney) · p = 0.5459 (two-sided test)
  • LAU-7b Phase 2 vs Placebo Phase2 · Wilcoxon (Mann-Whitney) · p = 0.6229 (two-sided test)
SecondaryFor Phase 2 Portion: Rate of All-causes Death by Day 29, Depicted by a Change From Baseline in the Ordinal Scale Score to Category 7

This was assessed with Day 29 (and Day 60, presented separately) Health Status grading using the World Health Organization 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

Time frame:
On Day 29
Reported as:
Count of participants · Participants
For Phase 2 Portion: Rate of All-causes Death by Day 29, Depicted by a Change From Baseline in the Ordinal Scale Score to Category 7
ParticipantsLAU-7b Phase 2Placebo Phase 2
Overall ITT population — Rate of all-cause death by Day 291210
Overall ITT population — All other Health Status including missing data105105
Participants with Health Status 3 + 4 at baseline — Rate of all-cause death by Day 2904
Participants with Health Status 3 + 4 at baseline — All other Health Status including missing data7668
Participants with Health Status 5 at baseline — Rate of all-cause death by Day 29126
Participants with Health Status 5 at baseline — All other Health Status including missing data2937
Statistical analysis
  • LAU-7b Phase 2 vs Placebo Phase 2 · Fisher Exact · p = 0.8222 (two-sided test)
  • LAU-7b Phase 2 vs Placebo Phase 2 · Fisher Exact · p = 0.0536 (two-sided test)
  • LAU-7b Phase 2 vs Placebo Phase 2 · Fisher Exact · p = 0.1131 (two-sided test)
SecondaryFor Phase 3 Portion: Rate of All-causes Death by Day 29, Depicted by a Change From Baseline in the Ordinal Scale Score to Category 7

This was assessed with Day 29 (and Day 60, presented separately) Health Status grading using the World Health Organization 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

Time frame:
On Day 29
Reported as:
Count of participants · Participants
For Phase 3 Portion: Rate of All-causes Death by Day 29, Depicted by a Change From Baseline in the Ordinal Scale Score to Category 7
ParticipantsLAU-7b Phase 3Placebo Phase 3
Rate of all-cause death by Day 2901
All other Health Status including missing data5761
SecondaryFor Phase 2 Portion: Rate of All-causes Death By Day 60, Depicted by a Change From Baseline in the Ordinal Scale Score to Category 7

This was assessed with Day 60 (and Day 29, presented separately) Health Status grading using the World Health Organization 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

Time frame:
On Day 60
Reported as:
Count of participants · Participants
For Phase 2 Portion: Rate of All-causes Death By Day 60, Depicted by a Change From Baseline in the Ordinal Scale Score to Category 7
ParticipantsLAU-7b Phase 2Placebo Phase 2
Overall ITT population — Rate of all-cause death by Day 601411
Overall ITT population — All other Health Status including missing data103104
Participants with Health Status 3 + 4 at baseline — Rate of all-cause death by Day 6004
Participants with Health Status 3 + 4 at baseline — All other Health Status including missing data7668
Participants with Health Status 5 at baseline — Rate of all-cause death by Day 60147
Participants with Health Status 5 at baseline — All other Health Status including missing data2736
Statistical analysis
  • LAU-7b Phase 2 vs Placebo Phase 2 · Fisher Exact · p = 0.6689 (two-sided test)
  • LAU-7b Phase 2 vs Placebo Phase 2 · Fisher Exact · p = 0.0536 (two-sided test)
  • LAU-7b Phase 2 vs Placebo Phase 2 · Fisher Exact · p = 0.0786 (two-sided test)
SecondaryFor Phase 3 Portion: Rate of All-causes Death By Day 60, Depicted by a Change From Baseline in the Ordinal Scale Score to Category 7

This was assessed with Day 60 (and Day 29, presented separately) Health Status grading using the World Health Organization 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

Time frame:
On Day 60
Reported as:
Count of participants · Participants
For Phase 3 Portion: Rate of All-causes Death By Day 60, Depicted by a Change From Baseline in the Ordinal Scale Score to Category 7
ParticipantsLAU-7b Phase 3Placebo Phase 3
Rate of all-cause death by Day 6031
All other Health Status including missing data5461
SecondaryProportion of Participants Alive and Free of Respiratory Failure by Day 29 (Ordinal Scale Scores 1-4, Inclusively)

This will be assessed through health status scoring using the WHO 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

Time frame:
Day 29
Reported as:
Count of participants · Participants
Proportion of Participants Alive and Free of Respiratory Failure by Day 29 (Ordinal Scale Scores 1-4, Inclusively)
ParticipantsLAU-7b Phase 3Placebo Phase 3
Proportion of Participants Alive and Free of Respiratory Failure by Day 29 (Ordinal Scale Scores 1-4, Inclusively)4855
Statistical analysis
  • LAU-7b Phase 3 vs Placebo Phase 3 · Fisher Exact · p = 1.000
SecondaryFor Phase 2 Portion: Rate of COVID-19 Disease-related Aggravation, Depicted by a Change From Baseline in the Ordinal Scale Score of at Least One Category

This was assessed through daily health status scoring using the World Health Organization 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

Time frame:
From baseline to Day 60
Reported as:
Count of participants · Participants
For Phase 2 Portion: Rate of COVID-19 Disease-related Aggravation, Depicted by a Change From Baseline in the Ordinal Scale Score of at Least One Category
ParticipantsLAU-7b Phase 2Placebo Phase 2
Overall ITT population — Rate of COVID-19 disease-related aggravation by Day 602728
Overall ITT population — No aggravation by Day 609087
Participants with Health Status 3 + 4 at baseline — Rate of COVID-19 disease-related aggravation by Day 601120
Participants with Health Status 3 + 4 at baseline — No aggravation by Day 606552
Participants with Health Status 5 at baseline — Rate of COVID-19 disease-related aggravation by Day 60168
Participants with Health Status 5 at baseline — No aggravation by Day 602535
Statistical analysis
  • LAU-7b Phase 2 vs Placebo Phase 2 · Fisher Exact · p = 1.000 (two-sided test)
  • LAU-7b Phase 2 vs Placebo Phase 2 · Fisher Exact · p = 0.0680 (two-sided test)
  • LAU-7b Phase 2 vs Placebo Phase 2 · Fisher Exact · p = 0.0534 (two-sided test)
SecondaryFor Phase 3 Portion: Rate of COVID-19 Disease-related Aggravation, Depicted by a Change From Baseline in the Ordinal Scale Score of at Least One Category

This was assessed through daily health status scoring using the World Health Organization 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

Time frame:
From baseline to Day 60
Reported as:
Count of participants · Participants
For Phase 3 Portion: Rate of COVID-19 Disease-related Aggravation, Depicted by a Change From Baseline in the Ordinal Scale Score of at Least One Category
ParticipantsLAU-7b Phase 3Placebo Phase 3
Rate of COVID-19 disease-related aggravation by Day 6079
No aggravation by Day 605053
Statistical analysis
  • LAU-7b Phase 3 vs Placebo Phase 3 · Fisher Exact · p = 0.7923 (Two-sided test)
SecondaryFor Phase 2 Only: Rate of COVID-19 Disease-related Transfer to Intensive Care Unit, Depicted by a Change From Baseline in the Ordinal Scale Score to Categories 5 or 6.

This was assessed through daily health status scoring using the World Health Organization 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

Time frame:
From baseline to Day 60
Reported as:
Count of participants · Participants
For Phase 2 Only: Rate of COVID-19 Disease-related Transfer to Intensive Care Unit, Depicted by a Change From Baseline in the Ordinal Scale Score to Categories 5 or 6.
ParticipantsLAU-7b Phase 2Placebo Phase 2
Overall ITT population — Rate of COVID-19 disease-related transfer to ICU5054
Overall ITT population — No transfer to ICU6761
Participants with Health Status 3 + 4 at baseline — Rate of COVID-19 disease-related transfer to ICU1015
Participants with Health Status 3 + 4 at baseline — No transfer to ICU6657
Participants with Health Status 5 at baseline — Rate of COVID-19 disease-related transfer to ICU4039
Participants with Health Status 5 at baseline — No transfer to ICU14
Statistical analysis
  • LAU-7b Phase 2 vs Placebo Phase 2 · Fisher Exact · p = 0.8886 (two-sided test)
  • LAU-7b Phase 2 vs Placebo Phase 2 · Fisher Exact · p = 0.2735 (two-sided test)
  • LAU-7b Phase 2 vs Placebo Phase 2 · Fisher Exact · p = 0.3604 (two-sided test)
SecondaryFor Phase 2 Only: Rate of COVID-19 Disease-related Transfer to Mechanical Ventilation, Depicted by a Change From Baseline in the Ordinal Scale Score to Category 6

This was assessed through daily health status scoring using the World Health Organization 7-point Ordinal Scale, a higher score is worse than a low score. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

Time frame:
From baseline to Day 60
Reported as:
Count of participants · Participants
For Phase 2 Only: Rate of COVID-19 Disease-related Transfer to Mechanical Ventilation, Depicted by a Change From Baseline in the Ordinal Scale Score to Category 6
ParticipantsLAU-7b Phase 2Placebo Phase 2
Overall ITT population — Rate of COVID-19 disease-related transfer to mechanical ventilation1011
Overall ITT population — No transfer to mechanical ventilation107104
Participants with Health Status 3 + 4 at baseline — Rate of COVID-19 disease-related transfer to mechanical ventilation05
Participants with Health Status 3 + 4 at baseline — No transfer to mechanical ventilation7667
Participants with Health Status 5 at baseline — Rate of COVID-19 disease-related transfer to mechanical ventilation106
Participants with Health Status 5 at baseline — No transfer to mechanical ventilation3137
Statistical analysis
  • LAU-7b Phase 2 vs Placebo Phase 2 · Fisher Exact · p = 1.000 (two-sided test)
  • LAU-7b Phase 2 vs Placebo Phase 2 · Fisher Exact · p = 0.0253 (two-sided test)
  • LAU-7b Phase 2 vs Placebo Phase 2 · Fisher Exact · p = 0.2729 (two-sided test)
SecondaryFor Phase 2 Only: Mean Change From Baseline of the Ordinal Scale Patient Health Status as a Function of Assessment Time.

This was assessed through daily health status scoring using the World Health Organization 7-point Ordinal Scale (below), a higher score is worse than a low score. Outcome measure data are counts of participants with a given change from baseline in number of categories, by treatment group. The mean change from baseline is compared between treatment groups. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

Time frame:
From baseline to Day 60
Reported as:
Count of participants · Participants
For Phase 2 Only: Mean Change From Baseline of the Ordinal Scale Patient Health Status as a Function of Assessment Time.
ParticipantsLAU-7b Phase 2Placebo Phase 2
Change from baseline on Day 14/end of hospitalization — Change of -4 categories00
Change from baseline on Day 14/end of hospitalization — Change of -3 categories33
Change from baseline on Day 14/end of hospitalization — Change of -2 categories46
Change from baseline on Day 14/end of hospitalization — Change of -1 category3848
Change from baseline on Day 14/end of hospitalization — No change4939
Change from baseline on Day 14/end of hospitalization — Change of +1 category107
Change from baseline on Day 14/end of hospitalization — Change of +2 categories14
Change from baseline on Day 29 — Change of -4 categories714
Change from baseline on Day 29 — Change of -3 categories4238
Change from baseline on Day 29 — Change of -2 categories2528
Change from baseline on Day 29 — Change of -1 category76
Change from baseline on Day 29 — No change40
Change from baseline on Day 29 — Change of +1 category42
Change from baseline on Day 29 — Change of +2 categories00
Change from baseline on Day 45 — Change of -4 categories915
Change from baseline on Day 45 — Change of -3 categories3735
Change from baseline on Day 45 — Change of -2 categories1012
Change from baseline on Day 45 — Change of -1 category32
Change from baseline on Day 45 — No change10
Change from baseline on Day 45 — Change of +1 category00
Change from baseline on Day 45 — Change of +2 categories00
Change from baseline on Day 60 — Change of -4 categories1119
Change from baseline on Day 60 — Change of -3 categories5048
Change from baseline on Day 60 — Change of -2 categories138
Change from baseline on Day 60 — Change of -1 category33
Change from baseline on Day 60 — No change10
Change from baseline on Day 60 — Change of +1 category00
Change from baseline on Day 60 — Change of +2 categories00
Statistical analysis
  • LAU-7b Phase 2 vs Placebo Phase 2 · Mixed Models Analysis · p = 0.6460 (Alpha set at 0.05)
SecondaryFor Phase 2 Only: Time to a Participant's Improvement of at Least One Category on the Ordinal Scale Health Status.

This was assessed through daily health status scoring using the World Health Organization 7-point Ordinal Scale (below), a higher score is worse than a low score. If health status was not improved (remains stable or aggravates) by Day 60, it was censored at Day 60. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

Time frame:
From baseline to Day 60
Reported as:
Mean · days
For Phase 2 Only: Time to a Participant's Improvement of at Least One Category on the Ordinal Scale Health Status.
daysLAU-7b Phase 2Placebo Phase 2
Overall ITT population, 75% percentile value9 (7 to 15)11 (8 to 14)
Participants with Health Status 3 + 4 at baseline, 75% percentile value7 (5 to 11)9.5 (6 to 14)
Participants with Health Status 5 at baseline, 75% percentile value15 (9 to 26)12 (9 to 15)
Statistical analysis
  • LAU-7b Phase 2 vs Placebo Phase 2 · Log Rank · p = 0.8722
  • LAU-7b Phase 2 vs Placebo Phase 2 · Log Rank · p = 0.5390
  • LAU-7b Phase 2 vs Placebo Phase 2 · Log Rank · p = 0.2319
SecondaryFor Phase 2 Portion: Time to Recovery, Defined as the Time to Reach Categories 2 or 1 on the Ordinal Scale Participant Health Status (First Occurrence if More Than Once).

This was assessed through daily health status scoring using the World Health Organization 7-point Ordinal Scale (below), a higher score is worse than a low score. If health status did not reach categories 2 or 1 by Day 60, it was censored at Day 60. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

Time frame:
From baseline to Day 60
Reported as:
Mean · days
For Phase 2 Portion: Time to Recovery, Defined as the Time to Reach Categories 2 or 1 on the Ordinal Scale Participant Health Status (First Occurrence if More Than Once).
daysLAU-7b Phase 2Placebo Phase 2
Overall ITT population, 75% percentile value14 (8 to 19)13 (10 to 15)
Participants with Health Status 3 + 4 at baseline, 75% percentile value8 (6 to 14)10 (7 to 14)
Participants with Health Status 5 at baseline, 75% percentile value21 (14 to 29)15 (12 to 22)
Statistical analysis
  • LAU-7b Phase 2 vs Placebo Phase 2 · Log Rank · p = 0.9358
  • LAU-7b Phase 2 vs Placebo Phase 2 · Log Rank · p = 0.6300
  • LAU-7b Phase 2 vs Placebo Phase 2 · Log Rank · p = 0.6550
SecondaryFor Phase 3 Portion: Time to Recovery, Defined as the Time to Reach Categories 2 or 1 on the Ordinal Scale Participant Health Status (First Occurrence if More Than Once).

This was assessed through daily health status scoring using the World Health Organization 7-point Ordinal Scale (below), a higher score is worse than a low score. If health status did not reach categories 2 or 1 by Day 60, it was censored at Day 60. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

Time frame:
From baseline to Day 60
Reported as:
Mean · days
For Phase 3 Portion: Time to Recovery, Defined as the Time to Reach Categories 2 or 1 on the Ordinal Scale Participant Health Status (First Occurrence if More Than Once).
daysLAU-7b Phase 3Placebo Phase 3
For Phase 3 Portion: Time to Recovery, Defined as the Time to Reach Categories 2 or 1 on the Ordinal Scale Participant Health Status (First Occurrence if More Than Once).6 (5 to 9)6 (5 to 9)
Statistical analysis
  • LAU-7b Phase 3 vs Placebo Phase 3 · Log Rank · p = 0.9101 (Two-sided test)
SecondaryFor Phase 2 Only: Time to Mechanical Ventilation, Defined Here as Time to Reach Category 6 on the Ordinal Scale Participant Health Status.

This was assessed through daily health status scoring using the World Health Organization 7-point Ordinal Scale (below), a higher score is worse than a low score. If category 6 was skipped and the subject died (category 7), it was considered an event. Subjects with missing observations were censored at their last available assessment if they did not need mechanical ventilation while on study. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

Time frame:
From baseline to Day 60
Reported as:
Mean · days
For Phase 2 Only: Time to Mechanical Ventilation, Defined Here as Time to Reach Category 6 on the Ordinal Scale Participant Health Status.
daysLAU-7b Phase 2Placebo Phase 2
For Phase 2 Only: Time to Mechanical Ventilation, Defined Here as Time to Reach Category 6 on the Ordinal Scale Participant Health Status.NA (NA to NA)NA (NA to NA)
SecondaryFor Phase 2 Only: Time to Death, Defined Here as a Time to Reach Category 7 on the Ordinal Scale Participant Health Status, Censored to Day 60 if it Happens Later Than Day 60

This was assessed through daily health status scoring using the World Health Organization 7-point Ordinal Scale (below), a higher score is worse than a low score. It was censored to Day 60 if it happened later than Day 60, or at the last available visit where the subject was alive if no further ordinal scale health status. 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities 3. Hospitalized, not requiring supplemental oxygen 4. Hospitalized, requiring supplemental oxygen 5. Hospitalized, on non-invasive ventilation or high flow oxygen devices 6. Hospitalized, on invasive mechanical ventilation or extra-corporeal membrane oxygenation 7. Death

Time frame:
From baseline to Day 60
Reported as:
Mean · days
For Phase 2 Only: Time to Death, Defined Here as a Time to Reach Category 7 on the Ordinal Scale Participant Health Status, Censored to Day 60 if it Happens Later Than Day 60
daysLAU-7b Phase 2Placebo Phase 2
For Phase 2 Only: Time to Death, Defined Here as a Time to Reach Category 7 on the Ordinal Scale Participant Health Status, Censored to Day 60 if it Happens Later Than Day 60NA (NA to NA)NA (NA to NA)
SecondaryFor Phase 2 Portion: Duration of Hospitalization (Days) Within the Study Period Days 1-60

Monitoring of the hospitalization. In case of re-hospitalization within Day 60 for a given participant, the additional hospitalization time was included. Hospitalization for more than 60 days was considered 60 days in the calculation.

Time frame:
From baseline to Day 60
Reported as:
Mean · days
For Phase 2 Portion: Duration of Hospitalization (Days) Within the Study Period Days 1-60
daysLAU-7b Phase 2Placebo Phase 2
Overall ITT population9.04 ± 10.518.23 ± 6.91
Participants with Health Status 3 + 4 at baseline6.33 ± 8.396.50 ± 5.78
Participants with Health Status 5 at baseline14.07 ± 12.1811.14 ± 7.69
Statistical analysis
  • LAU-7b Phase 2 vs Placebo Phase 2 · Wilcoxon (Mann-Whitney) · p = 0.2706 (two-sided test)
  • LAU-7b Phase 2 vs Placebo Phase 2 · Wilcoxon (Mann-Whitney) · p = 0.0974 (two-sided test)
  • LAU-7b Phase 2 vs Placebo Phase 2 · Wilcoxon (Mann-Whitney) · p = 0.5549 (two-sided test)
SecondaryFor Phase 3 Portion: Duration of Hospitalization (Days) Within the Study Period Days 1-60

Monitoring of the hospitalization. In case of re-hospitalization within Day 60 for a given participant, the additional hospitalization time was included. Hospitalization for more than 60 days was considered 60 days in the calculation.

Time frame:
From baseline to Day 60
Reported as:
Mean · days
For Phase 3 Portion: Duration of Hospitalization (Days) Within the Study Period Days 1-60
daysLAU-7b Phase 3Placebo Phase 3
For Phase 3 Portion: Duration of Hospitalization (Days) Within the Study Period Days 1-605.81 ± 6.956.77 ± 6.41
Statistical analysis
  • LAU-7b Phase 3 vs Placebo Phase 3 · Wilcoxon (Mann-Whitney) · p = 0.4787 (Two-sided test)
SecondaryFor Phase 2 Only: Time to Attain an Undetectable Viral Load in Oropharyngeal Swabs.

Intent was to compare median time to undetectable viral load between treatment groups, through oropharyngeal swabs done at specified times while hospitalized. However, almost all sites were unable to obtain serial samples until discharge of participants. Therefore, with only a handful of results (reported herein), it was not possible to estimate the time to undetectable viral load.

Time frame:
Until discharge of participants, up to Day 60
Reported as:
Number · participants
For Phase 2 Only: Time to Attain an Undetectable Viral Load in Oropharyngeal Swabs.
participantsLAU-7b Phase 2Placebo Phase 2
Positive SARS-CoV-2 result on Day 230
Positive SARS-CoV-2 result on Day 301
Positive SARS-CoV-2 result on Day 501
Positive SARS-CoV-2 result on Day 14 or End-of-Hospitalization23
SecondaryThe Change From Baseline in the Score Obtained on the EuroQol Five-dimensions Five-level (EQ-5D-5L) Quality-of-life Survey

This will be assessed in person or remotely, in participants reaching Days 14, 29, 45 and 60 and able to fill the questionnaire. EQ-5D-5L value was calculated based on the EQ-5D-5L user guide, and a higher value indicated better health status. The upper anchor point, full health, was 1.0 and the minimum value was 0.0.

Time frame:
On Days 1, 14, 29, 45 and 60
Reported as:
Mean · score on a scale
The Change From Baseline in the Score Obtained on the EuroQol Five-dimensions Five-level (EQ-5D-5L) Quality-of-life Survey
score on a scaleLAU-7b Phase 2Placebo Phase 2LAU-7b Phase 3Placebo Phase 3
Baseline0.544 ± 0.3460.599 ± 0.3180.597 ± 0.3080.517 ± 0.324
Day 14 or end of hospitalization0.747 ± 0.2740.783 ± 0.2180.745 ± 0.3090.660 ± 0.324
Day 290.838 ± 0.2380.853 ± 0.1850.819 ± 0.2630.754 ± 0.264
Day 450.871 ± 0.2500.912 ± 0.1390.824 ± 0.2160.745 ± 0.308
Day 600.888 ± 0.1950.920 ± 0.1270.830 ± 0.1800.774 ± 0.292
Statistical analysis
  • LAU-7b Phase 2 vs Placebo Phase 2 · Mixed Models Analysis · p = 0.4746 · Least squares mean difference: -0.02 · 95% CI -0.07 to 0.03A negative difference favours LAU-7b, a positive difference favours placebo.
  • LAU-7b Phase 2 vs Placebo Phase 2 · Mixed Models Analysis · p = 0.7445 · Leat squares mean difference: -0.01 · 95% CI -0.06 to 0.05A negative difference favours LAU-7b, a positive difference favours placebo.
  • LAU-7b Phase 2 vs Placebo Phase 2 · Mixed Models Analysis · p = 0.7105 · Least squares mean difference: -0.01 · 95% CI -0.07 to 0.05A negative difference favours LAU-7b, a positive difference favours placebo.
  • LAU-7b Phase 2 vs Placebo Phase 2 · Mixed Models Analysis · p = 0.6424 · Least squares mean difference: -0.01 · 95% CI -0.07 to 0.04A negative difference favours LAU-7b, a positive difference favours placebo.
  • LAU-7b Phase 3 vs Placebo Phase 3 · Mixed Models Analysis · p = 0.2789 · Least square means difference: 0.05 · 95% CI -0.04 to 0.14A negative difference favours LAU-7b, a positive difference favours placebo.
  • LAU-7b Phase 3 vs Placebo Phase 3 · Mixed Models Analysis · p = 0.2884 · Least square means difference: 0.05 · 95% CI -0.04 to 0.14A negative difference favours LAU-7b, a positive difference favours placebo.
  • LAU-7b Phase 3 vs Placebo Phase 3 · Mixed Models Analysis · p = 0.2058 · Least square means difference: 0.06 · 95% CI -0.03 to 0.15A negative difference favours LAU-7b, a positive difference favours placebo.
  • LAU-7b Phase 3 vs Placebo Phase 3 · Mixed Models Analysis · p = 0.5160 · Least square means difference: 0.03 · 95% CI -0.06 to 0.12A negative difference favours LAU-7b, a positive difference favours placebo.

Adverse events

Collected over Adverse events were collected from the time of informed consent until the End-of-Study follow-up on Day 60, or until early termination or death, whichever occurred first.. Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
LAU-7b Phase 214/117 (12%)23/117 (19.7%)97/117 (82.9%)
Placebo Phase 211/115 (9.6%)22/115 (19.1%)94/115 (81.7%)
LAU-7b Phase 33/57 (5.3%)12/57 (21.1%)45/57 (78.9%)
Placebo Phase 31/62 (1.6%)13/62 (21%)54/62 (87.1%)
Most frequent serious events
Showing 10 of 53
Most frequent serious events
EventLAU-7b Phase 2Placebo Phase 2LAU-7b Phase 3Placebo Phase 3
Respiratory failureRespiratory, thoracic and mediastinal disorders9/1179/1150/570/62
Acute respiratory failureRespiratory, thoracic and mediastinal disorders5/1172/1151/573/62
PneumoniaInfections and infestations1/1175/1151/571/62
HypoxiaRespiratory, thoracic and mediastinal disorders0/1170/1152/570/62
DyspnoeaRespiratory, thoracic and mediastinal disorders0/1171/1150/572/62
Atrioventricular block completeCardiac disorders0/1170/1151/570/62
Cardiac arrestCardiac disorders1/1170/1151/570/62
Ventricular tachycardiaCardiac disorders0/1170/1151/570/62
Sudden deathGeneral disorders0/1170/1151/570/62
Anaphylactic reactionImmune system disorders0/1170/1151/570/62
Most frequent other events
Showing 10 of 21
Most frequent other events
EventLAU-7b Phase 2Placebo Phase 2LAU-7b Phase 3Placebo Phase 3
Dry skinSkin and subcutaneous tissue disorders21/11717/1157/5712/62
Vision blurredEye disorders18/11720/1155/575/62
DiarrhoeaGastrointestinal disorders14/1177/1153/5710/62
DyspnoeaRespiratory, thoracic and mediastinal disorders8/1176/1158/574/62
NauseaGastrointestinal disorders4/1177/1156/578/62
InsomniaPsychiatric disorders7/1174/1154/577/62
CoughRespiratory, thoracic and mediastinal disorders2/1175/1156/577/62
ConstipationGastrointestinal disorders10/11712/1152/574/62
HeadacheNervous system disorders5/11712/1152/575/62
PyrexiaGeneral disorders5/1173/1152/576/62

Baseline characteristics

The Pilot Phase 2 and the Phase 3 extensions are distinct, sequential portions with different subjects.

Age, Continuous
Age, Continuous(years)LAU-7b Phase 2Placebo Phase 2LAU-7b Phase 3Placebo Phase 3Total
Mean57.5 ± 13.556.7 ± 12.468.1 ± 12.9765.9 ± 15.9161.1 ± 15
Age, Customized
Age, Customized(Participants)LAU-7b Phase 2Placebo Phase 2LAU-7b Phase 3Placebo Phase 3Total
18 to 44 years22224654
45 to 69 years70731826187
70 years and older25203530110
Sex: Female, Male
Sex: Female, Male(Participants)LAU-7b Phase 2Placebo Phase 2LAU-7b Phase 3Placebo Phase 3Total
Female46453028149
Male71702734202
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)LAU-7b Phase 2Placebo Phase 2LAU-7b Phase 3Placebo Phase 3Total
Hispanic or Latino10174536
Not Hispanic or Latino106985156311
Unknown or Not Reported10214
Race (NIH/OMB)
Race (NIH/OMB)(Participants)LAU-7b Phase 2Placebo Phase 2LAU-7b Phase 3Placebo Phase 3Total
American Indian or Alaska Native11002
Asian50139
Native Hawaiian or Other Pacific Islander00101
Black or African American14197747
White92864648272
More than one race00022
Unknown or Not Reported592218
Region of Enrollment
Region of Enrollment(participants)LAU-7b Phase 2Placebo Phase 2LAU-7b Phase 3Placebo Phase 3Total
Canada37352276
United States80805560275
Health Status of the Patient on the 7-point Ordinal Scale
Health Status of the Patient on the 7-point Ordinal Scale(Participants)LAU-7b Phase 2Placebo Phase 2LAU-7b Phase 3Placebo Phase 3Total
Health Status at baseline = 31712191967
Health Status at baseline = 459603743199
Health Status at baseline = 541431085
08

Study locations

29 sites
  • Chandler Regional Medical Center / Mercy Gilbert Medical Center
    Chandler, Arizona 85224, United States
  • Hoag Memorial Hospital Presbyterian
    Newport Beach, California 92663, United States
  • University of California Davis Medical Center
    Sacramento, California 95817, United States
  • Nuvance Health - Danbury Hospital
    Danbury, Connecticut 06810, United States
  • MedStar Washington Hospital Center
    Washington D.C., District of Columbia 20010, United States
  • Baptist Medical Center Beaches
    Jacksonville Beach, Florida 32250, United States
  • St Lukes Hospital
    Boise, Idaho 83702, United States
  • NorthShore University Health System - Swedish Hospital
    Chicago, Illinois 60625, United States
  • NorthShore University Health System - Glenbrook Hospital
    Glenview, Illinois 60026, United States
  • University of Iowa Hospitals and Clinics
    Iowa City, Iowa 52242, United States
  • Anne Arundel Medical Center, 2001 Medical Parkway, Belcher Pavillion
    Annapolis, Maryland 21401, United States
  • Wayne State University, Harper University Hospital and Detroit Receiving Hospital
    Detroit, Michigan 48201, United States
  • Henry Ford Health System
    Detroit, Michigan 48202, United States
  • University Medical Center of Southern Nevada
    Las Vegas, Nevada 89102, United States
  • Staten Island University Hospital North
    Staten Island, New York 10305, United States
  • Wake Forest University Health Science
    Winston-Salem, North Carolina 27157, United States
  • OhioHealth Riverside Methodist Hospital
    Columbus, Ohio 43214, United States
  • Kettering Health
    Kettering, Ohio 45429, United States
  • Robert Packer Hospital
    Sayre, Pennsylvania 18840, United States
  • University of Texas Southwestern
    Dallas, Texas 75390, United States
  • Houston Methodist Hospital
    Houston, Texas 77030, United States
  • PRX Research /Dallas Regional Medical Center
    Mesquite, Texas 75149, United States
  • University of Utah Health
    Salt Lake City, Utah 84112, United States
  • Centre d'études cliniques CIUSS SLJ, Hôpital Chicoutimi
    Chicoutimi, Quebec G7H 5H6, Canada
  • CIUSSSS de l'Est-de-l'Ile-de-Montréal, Hôpital Maisonneuve-Rosemont
    Montreal, Quebec H1T 2M4, Canada
  • Centre Hospitalier de l'Université de Montréal
    Montreal, Quebec H2X2P1, Canada
  • Jewish General Hospital
    Montreal, Quebec H3T 1E2, Canada
  • McGill University Health Centre
    Montreal, Quebec H4A 3J1, Canada
  • CISSS Des Laurentides
    Saint-Jérôme, Quebec J7Z 5T3, Canada
09

References and documents

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

10

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Aug 2020 to primary completion in Feb 2024, 41 months.

Results were first posted in Nov 2025, 1 year 8 months after primary completion.

How these figures are worked out, and which studies are left out of them.

Registered
May 28, 2020
First posted
Jun 4, 2020
StartActual
Aug 18, 2020
Primary completionActual
Feb 15, 2024
CompletionActual
May 30, 2024
Results first posted
Nov 13, 2025
Last update
Nov 13, 2025
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Nov 13, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT04417257
Lead sponsor
Laurent Pharmaceuticals Inc.
Responsible party
Sponsor
First posted
Jun 4, 2020
Start date
Aug 18, 2020
Primary completion
Feb 15, 2024
Completion
May 30, 2024
Results posted
Nov 13, 2025
Last update
Nov 13, 2025

Study contacts

Jean-Marie Houle, PhD
study director · Laurent Pharmaceuticals 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 terminated, as verified in Oct 2025. You cannot join it, but the record below documents what was studied.

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Studies of the drug tested here: Fenretinide

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