Therapeutic potential of mesenchymal stromal cells in COVID-19: a meta-analysis of clinical trials conducted since the pandemic onset

Relatively higher-quality human studies compared with other topics in this database, e.g. multiple RCTs or systematic reviews. This does not mean it is standard or approved care.

• Level A · Stronger Clinical Evidence
• Level B · Emerging clinical evidence with positive signals
• Level C · Early human research exploring benefits
• Level D · Scientific groundwork from lab and animal studies
• Emerging · Emerging topic under active research

Abstract (original English)

Background Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection can induce immune dysregulation and multi-organ injury; mesenchymal stromal cell (MSC) therapy has shown promise in clinical trials for COVID-19 and may have broader applicability to pneumonia induced by respiratory viruses (e.g., the influenza virus). This meta-analysis synthesized the available comparative clinical evidence on the safety and efficacy of MSCs in patients with moderate to critical COVID-19 and examined the reported outcomes relevant to Long-COVID. Methods We searched the PubMed, Embase, and CNKI databases for original, comparative studies in moderate, severe, or critical COVID-19 published up to September 2, 2024. Twenty-four eligible studies (13 RCTs and 11 non-randomized controlled trials; n = 1080) were included in the mortality meta-analysis. Patients were assigned to either the intervention group (MSC therapy plus standard care) or the control group (standard care with or without placebo). The primary efficacy outcome was all-cause mortality, while the primary safety outcomes were adverse events (AEs) and serious adverse events (SAEs). Secondary outcomes included clinical recovery, hospitalization metrics, chest imaging, and inflammatory biomarkers. We performed a pooled meta-analysis on mortality with subgroup analyses (by disease severity, administration route, dosing frequ

Evidence level

Relatively higher-quality human studies compared with other topics in this database, e.g. multiple RCTs or systematic reviews. This does not mean it is standard or approved care.

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