Phase 2
Completed N=20
Double-blind, Randomized, Controlled Clinical Trial to Assess Efficacy of MSC in Patients With COVID-19 ARDS
Acute Respiratory Distress Syndrome · COVID-19 Pneumonia
Source: ClinicalTrials.gov NCT04615429 ↗
Enrolled (actual)
20
Serious AEs
50.0%
Results posted
Mar 2026
Primary outcomePrimary: Change in the PaO2/FiO2* Ratio From Baseline to Day 7 of Treatment Administration — 83.3; 57.6 mmHg/mmHg
Summary
A double-blind, randomized, controlled, clinical trial to evaluate the efficacy and safety of MSC (mesenchymal stromal cells) intravenous administration in patients with COVID-induced ARDS compared to a control arm.
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Change in the PaO2/FiO2* Ratio From Baseline to Day 7 of Treatment Administration |
83.3; 57.6 | — |
| SECONDARY Improvement of ≥1 Category at World Health Organization 7 Point Scale |
0; 5; 8; 9 | — |
| SECONDARY Time to Improvement of ≥1 Category at WHO 7-point Scale |
10; 13.5 | — |
| SECONDARY Patients That Had Oxygen Therapy Withdrawn by Day 28 |
7; 5 | — |
| SECONDARY Time to Discontinuation of Oxygen Therapy (WHO ≤3) |
14; 23 | — |
| SECONDARY Proportion of Patients That Were Discharged at Day 28 |
7; 4 | — |
| SECONDARY Duration of Hospitalization |
17.5; 28 | — |
| SECONDARY Proportion of Patients That Required ICU Admission |
5; 8 | — |
| SECONDARY Duration of ICU Admission |
17; 16 | — |
| SECONDARY Mortality at Day 28 |
0; 1 | — |
| SECONDARY Mortality at 12 Months |
0; 1 | — |
| SECONDARY New Onset Fibrosis at 12 Months |
4; 1 | — |
Eligibility Criteria
Inclusion Criteria
- Informed consent prior to performing study procedures (witnessed oral consent with written consent by representatives will be accepted to avoid paper handling). Written consent by patient or representatives will be obtained whenever possible.
- Adult patients ≥18 years of age at the time of enrolment.
- Laboratory-confirmed SARS-CoV-2 infection as determined by PCR, in oropharyngeal swabs or any other relevant specimen obtained during the course of the disease. Alternative tests (e.g., rapid antigenic tests) are also acceptable as laboratory confirmation if their specificity has been accepted by the Sponsor.
- Moderate to severe ARDS (PaO2/FiO2 ratio equal or less than 200 mmHg) for less than 96 hours at the time of randomization.
- Patients requiring invasive ventilation are eligible within 72 hours from intubation.
- Eligible for ICU admission, according to the clinical team.
Exclusion Criteria
- Imminent and unavoidable progression to death within 24 hours, irrespective of the provision of treatments (in the opinion of the clinical team).
- "Do Not Attempt Resuscitation" order in place.
- Any end-stage organ disease or condition, which in the investigator's opinion, makes the patient an unsuitable candidate for treatment.
- History of a moderate/severe lung disorder requiring home-based oxygen therapy.
- Patient requiring ECMO, hemodialysis or hemofiltration at the time of treatment administration.
- Current diagnosis of pulmonary embolism.
- Active neoplasm, except carcinoma in situ or basalioma.
- Known allergy to the products involved in the allogenic MSC production process.
- Current pregnancy or lactation (women with childbearing potential should have a negative pregnancy test result at the time of study enrollment).
- Current participation in a clinical trial with an experimental treatment for COVID-19 (the use of any off-label medicine according to local treatment protocols is not an exclusion criteria).
- Any circumstances that in the investigator's opinion compromises the patient's ability to participate in the clinical trial.
Data sourced from ClinicalTrials.gov (NCT04615429). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication. Informational only — not medical advice.