Dunbar Hazel, Hawthorne Ian J, Tunstead Courteney, Dunlop Molly, Volkova Evelina, Weiss Daniel J, Santos Claudia C Dos, Armstrong Michelle E, Donnelly Seamas C, English Karen
Kathleen Lonsdale Institute for Human Health Research, Maynooth University, Maynooth, Co. Kildare, Ireland.
Department of Biology, Maynooth University, Maynooth, Co. Kildare, Ireland.
Eur J Immunol. 2025 Jan;55(1):e202451205. doi: 10.1002/eji.202451205. Epub 2024 Nov 6.
Enhancing mesenchymal stromal cell (MSC) therapeutic efficacy through licensing with proinflammatory cytokines is now well established. We have previously shown that macrophage migration inhibitory factor (MIF)-licensed MSCs exerted significantly enhanced therapeutic efficacy in reducing inflammation in house dust mite (HDM)-driven allergic asthma. Soluble mediators released into the MSC secretome boast cytoprotective properties equal to those associated with the cell itself. In asthma, epithelial barrier damage caused by the inhalation of allergens like HDM drives goblet cell hyperplasia. Vascular endothelial growth factor (VEGF) plays a pivotal role in the repair and maintenance of airway epithelial integrity. Human bone marrow-derived MSCs expressed the MIF receptors CD74, CXCR2, and CXCR4. Endogenous MIF from high MIF expressing CATT bone marrow-derived macrophages increased MSC production of VEGF through the MIF CXCR4 chemokine receptor, where preincubation with CXCR4 inhibitor mitigated this effect. CATT-MIF licensed MSC conditioned media containing increased levels of VEGF significantly enhanced bronchial epithelial wound healing via migration and proliferation in vitro. Blocking VEGFR2 or the use of mitomycin C abrogated this effect. Furthermore, CATT-MIF MSC CM significantly decreased goblet cell hyperplasia after the HDM challenge in vivo. This was confirmed to be VEGF-dependent, as the use of anti-human VEGF neutralising antibody abrogated this effect. Overall, this study highlights that MIF-licenced MSCs show enhanced production of VEGF, which has the capacity to repair the lung epithelium.
通过用促炎细胞因子进行预处理来提高间充质基质细胞(MSC)的治疗效果现已得到充分证实。我们之前已经表明,经巨噬细胞迁移抑制因子(MIF)预处理的MSC在减轻屋尘螨(HDM)诱发的过敏性哮喘炎症方面具有显著增强的治疗效果。释放到MSC分泌组中的可溶性介质具有与细胞本身相当的细胞保护特性。在哮喘中,吸入HDM等过敏原引起的上皮屏障损伤会导致杯状细胞增生。血管内皮生长因子(VEGF)在气道上皮完整性的修复和维持中起关键作用。人骨髓来源的MSC表达MIF受体CD74、CXCR2和CXCR4。来自高表达MIF的CATT骨髓来源巨噬细胞的内源性MIF通过MIF CXCR4趋化因子受体增加MSC的VEGF产生,用CXCR4抑制剂预孵育可减轻这种作用。含有增加水平VEGF的CATT-MIF预处理的MSC条件培养基通过体外迁移和增殖显著增强支气管上皮伤口愈合。阻断VEGFR2或使用丝裂霉素C可消除这种作用。此外,CATT-MIF MSC CM在体内HDM攻击后显著减少杯状细胞增生。这被证实是VEGF依赖性的,因为使用抗人VEGF中和抗体可消除这种作用。总体而言,这项研究强调,经MIF预处理的MSC显示出VEGF产生增加,其具有修复肺上皮的能力。
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