Using mesenchymal stromal cells to treat severe COVID-19 infection

Mesenchymal Stromal Cell Therapy for Severe Covid-19 Infection

Phase1; Phase2 Interventional University of Liege · NCT04445454

This study is testing if giving special cells from bone marrow can help hospitalized patients with severe COVID-19 pneumonia recover better.

Quick facts

PhasePhase1; Phase2
Study typeInterventional
Enrollment20 (estimated)
Ages18 Years to 70 Years
SexAll
SponsorUniversity of Liege Academic / other
Locations1 site (Liège)
Trial IDNCT04445454 on ClinicalTrials.gov

What this trial studies

This clinical trial evaluates the safety and efficacy of mesenchymal stromal cell (MSC) therapy in hospitalized patients suffering from severe to critical COVID-19 pneumonia. The study involves administering three intravenous infusions of bone marrow-derived MSCs at specified intervals, alongside standard supportive care. A total of 20 patients will be monitored for 90 days post-treatment to assess outcomes related to their COVID-19 condition. The trial is designed to gather data on the potential benefits of MSC therapy in improving patient recovery.

Who should consider this trial

Good fit: Ideal candidates are hospitalized adults aged 18 to 70 with confirmed severe COVID-19 pneumonia requiring oxygen support.

Not a fit: Patients with mild COVID-19 symptoms or those not requiring supplemental oxygen are unlikely to benefit from this study.

Why it matters

Potential benefit: If successful, this therapy could significantly improve recovery rates and outcomes for patients with severe COVID-19 pneumonia.

How similar studies have performed: Other studies have explored MSC therapy for various conditions, showing promising results, but this specific application for severe COVID-19 is relatively novel.

Eligibility criteria

Show full inclusion / exclusion criteria
COVID-19 patients Inclusion criteria

* Male or female patients aged at least 18 years and up to 70 years
* Diagnosed with microbiologically or radiologically confirmed COVID-19 pneumonia as defined by:
* Extensive interstitial pneumonia on CT scan, consistent with viral pneumonia, within 10 days prior to randomization
* And either positive result of COVID-19 PCR test within 14 days prior to inclusion or positive result of SARS-CoV2 PCR or serology within 14 days after inclusion.
* Requiring oxygen administration (SpO2 ≤ 93% on room air):

  * Group A: in standard or intensive care unit requiring supplemental oxygen
  * Group B: in intensive care unit under mechanical ventilation administered through a tracheal tube, either:
* for less than or equal to 7 days
* for 7 to 14 days, with persisting high inflammation (ferritin \> 2,000 µg/L; ferritin \> 1,000 µg/L and rising; lymphocytes \< 800 with CRP \> 70 mg/L and rising or ferritin \> 700 µg/L and rising or LDH \> 300 UI/L or D-Dimers \> 1000 ng/ml), not explained by superinfection. Rising = compared to previous 24H.
* Written consent of the patient, or - if impossible (clinical condition precluding capacity to consent) - of his/her legal representative, or - if impossible - of an impartial witness such as a physician from a non-participating department or member of the Ethics Committee. Any consent obtained this way shall be documented and confirmed by way of normal consent procedures at the earliest opportunity when the patient has recovered

Exclusion criteria

* Ongoing pregnancy. Women of childbearing potential (WOCBP, defined as a premenopausal female capable of becoming pregnant) should use an appropriate method of contraception (oral, injectable, or mechanical contraception; women whose partners have been vasectomized or have received or are utilizing mechanical contraceptive devices).
* Extracorporeal membrane oxygenation
* Limitations to intensity of care
* Life expectancy \< 24 hours
* Known allergy to IMP component
* Active secondary infection
* Any malignancy (except non-melanoma skin carcinoma) within 2 years before inclusion
* Pre-existing thrombo-embolic pathology
* Signs of an active drug or alcohol dependence, serious current illness, mental illness or any factors which, in the opinion of the Investigator, may interfere with subject's ability to understand and comply with study requirements
* Patients with any serious medical condition or abnormality of clinical laboratory tests that, in the Investigator's judgment, precludes the patient's safe participation in and completion of the study.
* Participation in another clinical trial(use of anti-viral/supportive drugs for COVID-19 infection on a compassionate use basis is not an exclusion criterion).

MSC donors Inclusion criteria

* Unrelated to the patient
* Male or female
* Age \> 18 yrs
* No HLA matching required
* Fulfills generally accepted criteria for allogeneic HSC donation
* Informed consent given by donor

Exclusion criteria

* Any condition not fulfilling inclusion criteria
* Known allergy to lidocaine
* Any risk factor for transmissible infectious diseases, in particular HIV

Where this trial is running

Liège

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Coronavirus Infectionmesenchymal stromal cells
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.