Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, TWIns, Tokyo 162-8666, Japan.
Department of Integrative Bioscience and Biomedical Engineering, Graduate School of Advanced Science and Engineering, Waseda University, TWIns, Tokyo 162-8480, Japan.
Int J Mol Sci. 2021 Jun 24;22(13):6780. doi: 10.3390/ijms22136780.
Culturing three-dimensional (3D) tissues with an appropriate microenvironment is a critical and fundamental technology in broad areas of cutting-edge bioengineering research. In addition, many technologies have engineered tissue functions. However, an effective system for transporting nutrients, waste, or oxygen to affect the functions of cell tissues has not been reported. In this study, we introduce a novel system that employs diffusion and convection to enhance transportation. To demonstrate the concept of the proposed system, three layers of normal human dermal fibroblast cell sheets are used as a model tissue, which is cultured on a general dish or porous collagen scaffold with perfusable channels for three days with and without the perfusion of culture media in the scaffold. The results show that the viability of the cell tissue was improved by the developed system. Furthermore, glucose consumption, lactate production, and oxygen transport to the tissues were increased, which might improve the viability of tissues. However, mechanical stress in the proposed system did not cause damage or unintentional functional changes in the cultured tissue. We believe that the introduced culturing system potentially suggests a novel standard for 3D cell cultures.
在广泛的前沿生物工程研究领域中,培养具有适当微环境的三维(3D)组织是一项关键且基础的技术。此外,许多技术已经实现了组织功能的工程化。然而,目前还没有报道一种有效的系统来输送营养物质、废物或氧气,以影响细胞组织的功能。在本研究中,我们引入了一种利用扩散和对流来增强传输的新型系统。为了验证所提出系统的概念,我们使用三层正常人类真皮成纤维细胞片作为模型组织,在普通培养皿或带有可灌注通道的多孔胶原支架上培养三天,支架中有无培养基灌注。结果表明,开发的系统提高了细胞组织的活力。此外,葡萄糖消耗、乳酸生成和氧气向组织的输送都有所增加,这可能提高组织的活力。然而,所提出系统中的机械应力并未对培养组织造成损伤或非预期的功能变化。我们相信,所介绍的培养系统可能为 3D 细胞培养提出了一种新的标准。
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