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临床级培养基的脐带间充质干细胞制造研究。

Study on the Umbilical Cord-Mesenchymal Stem Cell Manufacturing Using Clinical-Grade Culture Medium.

机构信息

Regenerative Medicine Research and Planning Division, Rohto Pharmaceutical Co., Ltd., Osaka, Japan.

Rohto Advanced Research Hong Kong Limited, New Territories, Hong Kong.

出版信息

Tissue Eng Part C Methods. 2022 Jan;28(1):23-33. doi: 10.1089/ten.TEC.2021.0207.

Abstract

Mesenchymal stem/stromal cell (MSC)-based therapies have been gaining increasing attention owing to their application in various diseases and conditions. In this study, we aimed to identify the optimal condition for industrial-scale MSC manufacturing. MSCs were isolated from umbilical cord (UC) tissues by implementing the explant method (Exp) or a collagenase based-enzymatic digestion method (Col), using a good manufacturing practice-compatible serum-free medium developed in-house. Microarray analysis demonstrated that the gene expression profiles of Exp-MSCs and Col-MSCs did not significantly differ according to the method of isolation or the culture conditions used. The isolated UC-MSCs were then subjected to expansion using conventional static culture (ST) or microcarrier-based culture in stirred-tank bioreactors (MC). Metabolomic and cytokine array analyses were conducted to evaluate the biochemical status of the MSCs. However, no remarkable differences in the metabolic profile and cytokine secretome between ST-MSCs and MC-MSCs were observed. On the contrary, we observed for the first time that the hydrophobic components of ST-MSCs and MC-MSCs were different, which suggested that the cell membrane distribution of fatty acids and lipids was altered in the process of adaptation to shear stress in MC-MSCs. These results establish the flexibility of the isolation and expansion method for UC-MSCs during the manufacturing processes and provide new insights into the minor differences between expansion methods that may exert remarkable effects on MSCs. In conclusion, we demonstrated the feasibility of both Exp-MSCs and Col-MSCs and MC and ST culture methods for scale-up and scale-out of MSC production, as well as the equivalence of these cells. As for the industrialized mass production of MSCs, enzyme-based methods for isolation and cell expansion in a bioreactor were considered to be more suitable. The methods developed, which underwent comprehensive evaluation in this study, may contribute toward the provision of sufficient MSC sources and the establishment of cost-effective MSC therapies. Impact statement Our in-house-developed good manufacturing practice-grade serum-free medium could be used for both isolation (Exp and Col) and expansion (ST and MC) of umbilical cord (UC)-mesenchymal stem/stromal cells (MSCs). Characteristics of the obtained UC-MSCs were widely assessed with regard to gene expression, metabolome, and secretome. Cellular characteristics and efficacy were observed to be equivalently maintained among whichever technique was applied. In addition, our research presents the first evidence that bioreactor and microcarrier-based MSC cultures alter the fatty acid and phospholipid composition of MSCs. These results provide new insights into the differences between expansion methods that may exert remarkable effects on MSCs.

摘要

间充质干细胞(MSC)为基础的疗法已越来越受到关注,因为它们在各种疾病和病症中的应用。在这项研究中,我们旨在确定工业规模 MSC 制造的最佳条件。我们通过实施外植体法(Exp)或胶原酶基础酶消化法(Col),使用内部开发的符合良好生产规范的无血清培养基,从脐带组织中分离 MSC。微阵列分析表明,根据分离方法或使用的培养条件,Exp-MSCs 和 Col-MSCs 的基因表达谱没有显著差异。然后将分离的 UC-MSCs 进行常规静态培养(ST)或搅拌罐生物反应器中的微载体培养(MC)扩增。进行代谢组学和细胞因子阵列分析以评估 MSC 的生化状态。然而,在 ST-MSCs 和 MC-MSCs 之间没有观察到代谢谱和细胞因子分泌组之间的显著差异。相反,我们首次观察到 ST-MSCs 和 MC-MSCs 的疏水性成分不同,这表明在 MC-MSCs 中适应剪切力的过程中,细胞膜分布的脂肪酸和脂质发生了改变。这些结果确立了 UC-MSCs 在制造过程中分离和扩增方法的灵活性,并为扩展方法之间的细微差异提供了新的见解,这些差异可能对 MSC 产生显著影响。总之,我们证明了 Exp-MSCs 和 Col-MSCs 以及 MC 和 ST 培养方法在 MSC 生产的放大和扩展中的可行性,以及这些细胞的等效性。对于 MSC 的工业化大规模生产,酶法分离和生物反应器中的细胞扩增被认为更合适。在这项研究中进行了全面评估的方法,可能有助于提供充足的 MSC 来源并建立具有成本效益的 MSC 疗法。

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