著者

山本 貞明 田中 賢 角南 寛 新井 景子 高山 あい子 山下 慈京子 森田 有香 下村 政嗣

出版者

公益社団法人 日本表面科学会

雑誌

表面科学 (ISSN:03885321)

巻号頁・発行日

vol.27, no.9, pp.502-510, 2006-09-10 (Released:2007-06-15)

参考文献数

59

被引用文献数

1 1

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Patterned surface topographies play vital roles in cellular response such as adhesion, proliferation, and differentiation. Here, we characterized adsorption of fibronectin (Fn) as a typical cell adhesion protein onto honeycomb-patterned porous films (“honeycomb film”) of poly (ε-caprolactone) (PCL) incubated in a Fn phosphate-buffered saline (PBS) solution by using atomic force microscopy (AFM) and confocal laser scanning microscopy (CLSM). In order to determine how cells respond to a honeycomb film, focal adhesion of porcine aortic endothelial cells (PAECs) cultured on the Fn coated honeycomb films in a serum free medium were characterized by using immunofluorescencet labeling of vinculin and focal adhesion kinase autophosphorylated at the tyrosine residue 397 (pY 397 FAK). Fn adsorbed around the pore periphery of a honeycomb film to form fibriller aggregates in a ring-shape structure. The sites of pY 397 FAK and vinculin were overlapped and agreed well with the adsorption site of Fn fibrils. This demonstrated that PAECs adhered onto the honeycomb films at focal contact points localized around pore periphery. The expression of pY397FAK determined by an immunoprecipitation method was 3 times higher than that on a PCL flat film as a reference. These results imply that the signaling mediated by a integrin receptor-Fn binding were activated on honeycomb films and this type of signaling was activated effectively on a honeycomb film compared with on a flat film. The cell response to honeycomb films (adhesion pattern and phosphorilation of FAK) was supposed to originate from the regularly arraigned adsorption pattern of Fn determined by the pore structure of the film.

著者

角南 寛 清水 雄介 横田 育子 五十嵐 靖之 岸本 英博 松下 正之

出版者

公益社団法人 日本表面科学会

雑誌

表面科学

巻号頁・発行日

vol.38, no.9, pp.473-478, 2017

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<p>NIH-3T3 cells were adhered to three kinds of 3D micro-patterned scaffolds, placed face-down into culture medium in glass-bottomed dishes, and cell migration and the scaffolds were observed over 72 h. The three scaffolds differed only in terms of the unit shape of the repetitive pattern, namely a scale structure with equilateral triangular pores, a check structure with regular tetragonal pores, or a stripe structure with rectangular grooves. The angle that cells turn is influenced by the unit shape of the 3D patterned scaffold on which they are cultured. These differences in the angles that migrating cells turned correlated with differences in the angles they extended protrusions. In summary, the unit shape of the micro-patterned scaffold affects the angle at which cells extend, which in turn affects the angle at which migrating cells turn.</p>