School of Dentistry, Taipei Medical University, Taipei, Taiwan.
J Endod. 2010 Aug;36(8):1336-40. doi: 10.1016/j.joen.2010.04.015. Epub 2010 Jun 23.
INTRODUCTION: Human dental pulp stem cells (DPSCs) have been reported to be useful material for future regenerative medicine. Clinically, cryopreservation of intact teeth can successfully preserve the periodontal ligament for future autotransplantation; however, the effects of cryopreservation procedure on the properties of DPSCs are still unclear. The aim of this study was to test whether DPSCs isolated from cryopreserved teeth can express stem cell-specific markers. METHODS: In this study, a novel programmable freezer coupled to a magnetic field was used to perform the cryopreservation experiments. The tested DPSCs were isolated from magnetically cryopreserved and non-cryopreserved fresh teeth with an enzyme digestion procedure. The success rate of isolation, growth curves, morphology, stem cell-specific markers, and the differentiation capacity of the isolated cells were evaluated and compared. RESULTS: The isolation rate of dental pulp cells from magnetically cryopreserved teeth was 73%. After culture for 5 generations, there was no significant difference in cell viability between cells isolated from magnetically cryopreserved teeth and those isolated from fresh teeth. There were also no visible differences between the 2 groups of dental pulp cells in morphology, expression of stem cell markers, or osteogenic and adipogenic differentiations. CONCLUSIONS: The results suggest that cryopreserved whole teeth can be used for autotransplantation and provide a viable source of DPSCs.
简介:人牙髓干细胞(DPSCs)已被报道可用于未来的再生医学。临床上,完整牙齿的冷冻保存可以成功保存牙周韧带,以备未来的自体移植;然而,冷冻保存程序对 DPSCs 特性的影响尚不清楚。本研究旨在测试从冷冻保存的牙齿中分离的 DPSCs 是否能表达干细胞特异性标志物。
方法:在这项研究中,使用一种新型可编程冷冻机与磁场相结合来进行冷冻保存实验。通过酶消化程序,从磁性冷冻保存和非冷冻保存的新鲜牙齿中分离测试的 DPSCs。评估并比较了分离的成功率、生长曲线、形态、干细胞特异性标志物和分离细胞的分化能力。
结果:从磁性冷冻保存的牙齿中分离牙髓细胞的成功率为 73%。培养 5 代后,从磁性冷冻保存的牙齿中分离的细胞与从新鲜牙齿中分离的细胞在细胞活力方面没有显著差异。两组牙髓细胞在形态、干细胞标志物表达或成骨和成脂分化方面也没有明显差异。
结论:结果表明,冷冻保存的全牙可用于自体移植,并为 DPSCs 提供了可行的来源。
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