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<p>Mesenchymal stromal cells (MSCs) are widely recognized for their immunomodulatory properties, which underpin their therapeutic potential in inflammatory and immune-mediated diseases. Although MSC therapies have consistently proven safe, clinical efficacy remains inconclusive, maybe due to incomplete understanding of MSC interactions with the immune environment. This review evaluates current trends in MSC immunomodulation research, based on 318 studies published since 2019 until medio 2024. The most frequently used assays included characterization, proliferation, and polarization, employing methods such as flow cytometry, enzyme-linked immunosorbent assays and colorimetric assays, and polymerase chain reaction. Many studies incorporated strategies for priming of MSCs or included immune cells, most commonly peripheral blood mononuclear cells, T cells, and macrophages. We identify key sources of variability and propose a minimum reporting checklist including MSC source, priming conditions, assay design, and immune cell characteristics. We further recommend implementation of multi-assay workflows combining phenotypic characterization with at least one functional assay. These measures may improve transparency, comparability across studies, and guide robust assay design.</p> Graphical Abstract <p></p>

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In vitro assays for investigating the immunomodulatory properties of human mesenchymal stromal cells

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年2月7日

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  • Laura Lykke Lethager,
  • Stine Bangsgaard,
  • Ellen Mønsted Johansen,
  • Abbas Ali Qayyum,
  • Jan Pravsgaard Christensen,
  • Annette Ekblond,
  • Morten Juhl Nørgaard,
  • Lisbeth Drozd Højgaard

摘要

Mesenchymal stromal cells (MSCs) are widely recognized for their immunomodulatory properties, which underpin their therapeutic potential in inflammatory and immune-mediated diseases. Although MSC therapies have consistently proven safe, clinical efficacy remains inconclusive, maybe due to incomplete understanding of MSC interactions with the immune environment. This review evaluates current trends in MSC immunomodulation research, based on 318 studies published since 2019 until medio 2024. The most frequently used assays included characterization, proliferation, and polarization, employing methods such as flow cytometry, enzyme-linked immunosorbent assays and colorimetric assays, and polymerase chain reaction. Many studies incorporated strategies for priming of MSCs or included immune cells, most commonly peripheral blood mononuclear cells, T cells, and macrophages. We identify key sources of variability and propose a minimum reporting checklist including MSC source, priming conditions, assay design, and immune cell characteristics. We further recommend implementation of multi-assay workflows combining phenotypic characterization with at least one functional assay. These measures may improve transparency, comparability across studies, and guide robust assay design.

Graphical Abstract