Adipose tissue‐derived mesenchymal stromal cells (ASCs) hold the promise of achieving successful immunotherapeutic results due to their ability to regulate different T‐cell fate. ASCs also show significant adaptability to environmental stresses by modulating their immunologic profile. Cell‐based therapy for inflammatory disease requires a detailed understanding of the molecular relation between ASCs and Th17 lymphocytes taking into account the influence of inflammation and cell ratio on such interaction. Accordingly, a dose‐dependent increase in Th17 generation was only observed in high MSC:T‐cell ratio with no significant impact of inflammatory priming. IL‐23 receptor (IL‐23R) expression by T cells was not modulated by ASCs when compared to levels in activated T cells, while ROR‐γt expression was significantly increased reaching a maximum in high (1:5) unprimed ASC:T‐cell ratio. Finally, multiplex immunoassay showed substantial changes in the secretory profile of 15 cytokines involved in the Th17 immune response (IL‐1β, IL‐4, IL‐6, IL‐10, IL‐17A, IL‐17F, IL‐22, IL‐21, IL‐23, IL‐25, IL‐31, IL‐33, IFN‐γ, sCD40, and TNF‐α), which was modulated by both cell ratio and inflammatory priming. These findings suggest that Th17 lymphocyte pathway is significantly modulated by ASCs that may lead to immunological changes. Therefore, future ASC‐based immunotherapy should take into account the complex and detailed molecular interactions that depend on several factors including inflammatory priming and cell ratio.
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Bibliographic reference
Najar, Mehdi ; Lombard, Catherine ; Fayyad‐Kazan, Hussein ; Faour, Wissam H. ; Merimi, Makram ; et. al. Th17 immune response to adipose tissue‐derived mesenchymal stromal cells. In: Journal of Cellular Physiology, Vol. 234, no. 11, p. 21145-21152 (2019)
Fahmi, Hassan
