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Safety Profile of Good Manufacturing Practice Manufactured Interferon γ‐Primed Mesenchymal Stem/Stromal Cells for Clinical Trials

机译:良好生产规范的安全性概况制造的干扰素γ标记的间充质干细胞/基质细胞用于临床试验

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摘要

Mesenchymal stem/stromal cells (MSCs) are widely studied by both academia and industry for a broad array of clinical indications. The collective body of data provides compelling evidence of the clinical safety of MSC therapy. However, generally accepted proof of therapeutic efficacy has not yet been reported. In an effort to generate a more effective therapeutic cell product, investigators are focused on modifying MSC processing protocols to enhance the intrinsic biologic activity. Here, we report a Good Manufacturing Practice‐compliant two‐step MSC manufacturing protocol to generate MSCs or interferon γ (IFNγ) primed MSCs which allows freshly expanded cells to be infused in patients on a predetermined schedule. This protocol eliminates the need to infuse cryopreserved, just thawed cells which may reduce the immune modulatory activity. Moreover, using (IFNγ) as a prototypic cytokine, we demonstrate the feasibility of priming the cells with any biologic agent. We then characterized MSCs and IFNγ primed MSCs prepared with our protocol, by karyotype, in vitro potential for malignant transformation, biodistribution, effect on engraftment of transplanted hematopoietic cells, and in vivo toxicity in immune deficient mice including a complete post‐mortem examination. We found no evidence of toxicity attributable to the MSC or IFNγ primed MSCs. Our data suggest that the clinical risk of infusing MSCs or IFNγ primed MSCs produced by our two‐step protocol is not greater than MSCs currently in practice. While actual proof of safety requires phase I clinical trials, our data support the use of either cell product in new clinical studies. Stem Cells Translational Medicine 2017;6:1868–1879
机译:学术界和工业界都广泛研究了间充质干/基质细胞(MSCs)的广泛临床适应症。集体数据为MSC治疗的临床安全性提供了令人信服的证据。然而,尚未报道普遍接受的治疗功效的证据。为了产生更有效的治疗性细胞产品,研究人员致力于修改MSC处理规程以增强内在的生物学活性。在这里,我们报告了符合《药品生产质量管理规范》的两步MSC制造规程,可生成MSC或干扰素γ(IFNγ)引发的MSC,从而允许按预定的时间表将新鲜扩增的细胞注入患者体内。该方案消除了注入冷冻保存的,刚刚融化的细胞的需要,这可能降低免疫调节活性。此外,使用(IFNγ)作为原型细胞因子,我们证明了用任何生物制剂引发细胞的可行性。然后,我们通过核型,在体外对恶性转化的潜力,生物分布,对移植的造血细胞移植的影响以及对免疫缺陷小鼠的体内毒性(包括完整的死后检查)来表征按照我们的方案制备的MSC和IFNγ引发的MSC。我们没有发现可归因于MSC或IFNγ引发的MSC毒性的证据。我们的数据表明,由我们的两步操作方案产生的输注MSC或IFNγ引发的MSC的临床风险不大于目前实践中的MSC。尽管实际的安全性证明需要进行I期临床试验,但我们的数据支持在新的临床研究中使用两种细胞产品。干细胞转化医学2017; 6:1868-1879

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