Hu Yunxia, Zheng Lijuan, Zheng Zheng, Fu Mali, Peng Haiying, Ma Shaohua
Institute of Biopharmaceutical and Health Engineering (iBHE), Tsinghua Shenzhen International Graduate School (SIGS), Tsinghua University, Shenzhen, China.
Key Lab of Industrial Biocatalysis, Ministry of Education, Shenzhen, China.
J Extracell Vesicles. 2025 Apr;14(4):e70053. doi: 10.1002/jev2.70053.
Human mesenchymal stem cell-derived extracellular vesicles (hMSC-EVs) have shown great potential in tissue repair and regeneration. However, their scalable production and functional quality are still limited by current expansion technologies. In this study, we propose a production technology for hMSC-EVs based on three-dimensional (3D) microbead culture, which enhances the secretory behaviour of hMSC. Fixed number of MSCs were encapsulated in Matrigel at appropriate densities and printed into 3D microbeads by the custom automated microfluidic bead-jet printing technique. Compared with 2D culture group, EVs derived from 3D hMSC microbead had smaller size and increased yield by 20-fold, and the actin depolymerisation of the cell may be an important mechanism for enhancing EV secretion. Further analysis confirmed that the EVs derived from 3D hMSC microbead exhibited enhanced angiogenic and proliferative capabilities, which promoted the viability and tube-forming capacity of human umbilical vein endothelial cells (HUVEC). In conclusion, this automated microfluidic microbead encapsulation technology increased the yield and therapeutic effect of hMSC-EVs and provides a platform for scalable EV production of regenerative therapies.
人骨髓间充质干细胞衍生的细胞外囊泡(hMSC-EVs)在组织修复和再生方面已显示出巨大潜力。然而,它们的可扩展生产和功能质量仍受当前扩增技术的限制。在本研究中,我们提出了一种基于三维(3D)微珠培养的hMSC-EVs生产技术,该技术可增强hMSC的分泌行为。将固定数量的间充质干细胞以适当密度包封在基质胶中,并通过定制的自动化微流控珠喷射打印技术打印成3D微珠。与二维培养组相比,源自3D hMSC微珠的细胞外囊泡尺寸更小,产量提高了20倍,细胞的肌动蛋白解聚可能是增强细胞外囊泡分泌的重要机制。进一步分析证实,源自3D hMSC微珠的细胞外囊泡表现出增强的血管生成和增殖能力,可促进人脐静脉内皮细胞(HUVEC)的活力和管形成能力。总之,这种自动化微流控微珠封装技术提高了hMSC-EVs的产量和治疗效果,并为再生疗法的细胞外囊泡可扩展生产提供了一个平台。