生物技術領域中，材料表面形貌和化學修飾對細胞的相容性和相互作用扮演重要的角色。 本論文第一部分探討生物相容性，利用陽極氧化法製備出不同尺寸管徑的鉭氧化物奈米管，生物相容性的體外實驗顯示，纖維母細胞在具潤濕性的鉭氧化物表面具有良好的行為。細胞於 35 奈米管徑下，顯示具有最佳的生物相容性。適當尺寸的奈米管和表面粗糙化可以增加細胞對鉭金屬片的相容性。 第二部分發展有效分離鼻咽癌循環腫瘤癌細胞的基板。用靜電紡絲技術製備出不同密度的二氧化鈦奈米纖維。進一步將抗體修飾於二氧化鈦表面，進行體外的鼻咽癌循環腫瘤癌細胞捕捉，再用螢光免疫法進行評估。結果顯示高密度的二氧化鈦奈米纖維捕捉癌細胞的能力比低密度的強。經抗體修飾後的高密度的二氧化鈦奈米纖維可以有效捕捉癌細胞，未來可能具有臨床應用的潛力。;In the field of bio-technology, surface morphology and chemical modification of biomaterials play important roles in the biocompatibility and interaction between cells and materials. The first study investigated the biocompatibility of self-organized TaOx nanotubes arrays with different nanotubes diameters fabricated by electrochemical anodization. In vitro biocompatibility evaluation indicated that fibroblast cells exhibit an obvious wettability-dependent behavior on the TaOx nanotubes. The 35-nm-diameter TaOx nanotubes arrays revealed the highest biocompatibility among all samples. This work demonstrates that the biocompatibility in Ta can be significantly improved by forming TaOx nanotubes arrays on the surface with appropriate nanotubes diameter and geometric roughness. The second part was to develop an effective platform for isolation of circulating tumor cells (CTCs) of nasopharyngeal carcinoma (NPC). Self-organized titanium oxide (TiO2) nanofibers of different densities were fabricated by electrospinning method. Anti-EpCAM antibodies were further conjugated on the TiO2 nanofibers to capture NPC CTCs in vitro and evaluated by mmunofluorescence. The results demonstrated that high-density TiO2 nanofibers showed better NPC CTCs capturing performance than the low-density ones. Moreover, TiO2 nanofibers prepared with higher concentration of ant-pCAM antibody showed better cell capturing ability. The high-density TiO2 nanofibers conjugated with anti-EpCAM antibodies can capture the CTCs of NPC effectively, which may have the potential for future clinical application.
