The application of 3D micropatterning of agarose substrate for cell culture and in situ comet assays
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- 作者：Emilie Mercey ; Patricia Obeï ; d ; Denise Glaise ; Maria-Luisa Calvo-Muñ ; oz ; Christiane Guguen-Guillouzo ; Brigitte Fouqué
- 关键词：3D micropatterning ; Agarose ; Cell array ; Comet assay ; HepaRG hepatocytes ; Genotoxicity
- 刊名：Biomaterials
- 出版年：2010
- 出版时间：April 2010
- 年：2010
- 卷：31
- 期：12
- 页码：3156-3165
- 全文大小：2140 K
文摘
We report the fabrication of a 3D micropatterned agarose substrate that enables the culture of single or multiple cells. Patterning was performed on dried agarose using deep UV irradiation leading to 6-μm-deep micropatterns of 25–70 μm in diameter. Cell adhesion was facilitated by the specific grafting of ECM (extra cellular matrix) proteins such as fibronectin into the micropatterns. We show that the pattern size induced the adhesion of one or more cells, thus allowing precise control of the cell number used in the assay, and that cells proliferated similarly as in standard culture conditions. Moreover, cell polarity appeared well preserved on this substrate, so polarized cells like hepatoma HepaRG cells might maintain their differentiation status and act as primary human hepatocytes for hepatotoxicity testing. These 3D patterned culture slides have been successfully used for in situ comet assays and there is evidence that the genotoxic effects of sub-cytotoxic concentrations of drugs could be analyzed in a large number of single HeLa cells. Coupled with the parallel-based design of the 3D micropatterning, which allows automated image analysis, these results strongly indicate that this new cell array system is suitable for high-throughput cytotoxicity and genotoxicity screening applications.