To evaluate the safety, toxicity and immunological effects of infusion of allogeneic bone marrow-derived human mesenchymal stem (stromal) cells (MSCs) and whether this therapy has an influence on the resolution processes in ARDS patients infected with Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
40
infusion of allogeneic bone marrow-derived human mesenchymal stem (stromal) cells
University Hospital Tuebingen
Tübingen, Germany
lung injury score
improvement of lung injury score (LIS), 0-16 points, severity increasing with higher points
Time frame: day 10
D-dimers
D-dimers blood levels
Time frame: day 0, 1, 2, 3, 10 and 15
phenotype
distribution of phenotypes of immune cells
Time frame: day 0, 1, 2, 3, 10 and 15
pro-resolving lipid mediators
Levels of specialized pro-resolving lipid mediators within alveolar macrophages and bronchoalveolar lavage
Time frame: day 0, 1, 2, 3, 10 and 15
cytokines
Cytokine concentration within bronchoalveolar lavage and Serum prior and after MSC infusions
Time frame: day 0, 1, 2, 3, 10 and 15
chemokines
Chemokine concentration within bronchoalveolar lavage and Serum prior and after MSC infusions
Time frame: day 0, 1, 2, 3, 10 and 15
Survival
Survival at 10 days and 28 days
Time frame: day 10 and 28
extubation
Time to removal of endotracheal tube
Time frame: day 28
lymphocyte subpopulations
lymphocyte subpopulations in peripheral blood by flow cytometry prior and after MSC infusion (day 0,3,5,10)
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Time frame: day 0, 3, 5 and 10
SARS-CoV-2-specific antibody titers
evaluate SARS-CoV-2-specific antibody titers in the serum of patients prior and post MSC infusion.
Time frame: day 0, 5 and 10
complement molecules (C5-C9)
evaluate levels of complement molecules (C5-C9) in the serum of patients prior and post MSC infusion
Time frame: day 0, 5 and 10