Földes Anna, Reider Hajnalka, Varga Anita, Nagy Krisztina S, Perczel-Kovach Katalin, Kis-Petik Katalin, DenBesten Pamela, Ballagi András, Varga Gábor
Department of Oral Biology, Semmelweis University, H-1089 Budapest, Hungary.
Department of Applied Biotechnology and Food Science, University of Technology and Economics, H-1089 Budapest, Hungary.
Polymers (Basel). 2021 Nov 15;13(22):3951. doi: 10.3390/polym13223951.
Ectomesenchymal stem cells derived from the dental pulp are of neural crest origin, and as such are promising sources for cell therapy and tissue engineering. For safe upscaling of these cells, microcarrier-based culturing under dynamic conditions is a promising technology. We tested the suitability of two microcarriers, non-porous Cytodex 1 and porous Cytopore 2, for culturing well characterized dental pulp stem cells (DPSCs) using a shake flask system. Human DPSCs were cultured on these microcarriers in 96-well plates, and further expanded in shake flasks for upscaling experiments. Cell viability was measured using the alamarBlue assay, while cell morphology was observed by conventional and two-photon microscopies. Glucose consumption of cells was detected by the glucose oxidase/Clark-electrode method. DPSCs adhered to and grew well on both microcarrier surfaces and were also found in the pores of the Cytopore 2. Cells grown in tissue culture plates (static, non-shaking conditions) yielded 7 × 10 cells/well. In shake flasks, static preincubation promoted cell adhesion to the microcarriers. Under dynamic culture conditions (shaking) 3 × 10 cells were obtained in shake flasks. The DPSCs exhausted their glucose supply from the medium by day seven even with partial batch-feeding. In conclusion, both non-porous and porous microcarriers are suitable for upscaling ectomesenchymal DPSCs under dynamic culture conditions.
源自牙髓的外胚间充质干细胞起源于神经嵴,因此是细胞治疗和组织工程中有前景的细胞来源。为了安全地扩大这些细胞的规模,基于微载体的动态培养是一项有前景的技术。我们使用摇瓶系统测试了两种微载体,即无孔的Cytodex 1和多孔的Cytopore 2,用于培养特征明确的牙髓干细胞(DPSC)的适用性。人DPSC在96孔板中的这些微载体上培养,并在摇瓶中进一步扩增以进行扩大培养实验。使用alamarBlue测定法测量细胞活力,同时通过传统显微镜和双光子显微镜观察细胞形态。通过葡萄糖氧化酶/克拉克电极法检测细胞的葡萄糖消耗。DPSC在两种微载体表面均能附着并良好生长,并且在Cytopore 2的孔中也能发现。在组织培养板(静态、非摇动条件)中生长的细胞每孔产生7×10个细胞。在摇瓶中,静态预孵育促进细胞附着于微载体。在动态培养条件(摇动)下,摇瓶中获得了3×10个细胞。即使进行部分分批补料,DPSC在第7天时也耗尽了培养基中的葡萄糖供应。总之,无孔和多孔微载体均适用于在动态培养条件下扩大外胚间充质DPSC的规模。