Doyle Andrew D
National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda Maryland, USA.
Bio Protoc. 2018 Jul 5;8(13). doi: 10.21769/BioProtoc.2919.
Rat tail collagen solutions have been used as polymerizable three-dimensional (3D) extracellular matrix (ECM) gels for single and collective cell migration assays as well as spheroid formation. These 3D hydrogels are a relatively inexpensive, simple to use model system that can mimic the physical characteristics of numerous tissues within the body, namely the skin. While confocal imaging techniques such as fluorescence reflection and two-photon microscopy are able to visualize collagen fibrils during 3D imaging without fluorescence, other imaging modalities require direct conjugation of fluorescent dyes to collagen. Here we detail how to generate 3D collagen gels labeled with a fluorescent dye. Furthermore, we go through the steps required to reproducibly generate bright collagen hydrogels that are suitable for live cell 3D imaging techniques.
大鼠尾胶原溶液已被用作可聚合的三维(3D)细胞外基质(ECM)凝胶,用于单细胞和集体细胞迁移分析以及球体形成。这些3D水凝胶是一种相对便宜、易于使用的模型系统,能够模拟体内许多组织(即皮肤)的物理特性。虽然共聚焦成像技术(如荧光反射和双光子显微镜)能够在3D成像过程中在无荧光的情况下可视化胶原纤维,但其他成像方式需要将荧光染料直接与胶原结合。在这里,我们详细介绍如何生成用荧光染料标记的3D胶原凝胶。此外,我们还介绍了可重复生成适合活细胞3D成像技术的明亮胶原水凝胶所需的步骤。