绿色荧光蛋白转基因成纤维细胞与义齿基托树脂复合生长状况的活体观察

Visualizing Living Fibroblast on Co-cultured Denture Base Resin by Green Fluorescent Protein Marker Introduced into the Cell

细胞与材料复合生长状况的活体动态监测可能理想地反映材料的体外生物相容性。本研究通过绿色荧光蛋白 (Green fluorescent protein,GFP)转基因技术成功标记了小鼠成纤维细胞 L 92 9。该荧光蛋白标记细胞与义齿基托树脂复合培养过程中 ,通过倒置相差显微镜和荧光显微镜活体动态监测了材料周围和材料表面细胞形态、增殖及其对材料的黏附等状况。结果发现 ,义齿基托树脂制备过程中残留的甲基丙烯酸甲酯单体表现了一过性的细胞毒作用 ,但该细胞毒作用可以通过树脂的短时间浸泡而得以消除。活体动态观察可以发现材料很轻微的毒副作用 ,表明细胞与材料复合生长状况的活体动态监测能更真实。

Visualizing living cells growing on co-cultured biomaterials is ideal for material biocompatibility evaluation in vitro. In this experiment, mouse fibroblasts L929 were labeled by introducing the gene coding enhanced green fluorescent protein (EGFP) marker into the cells. Morphology as well as proliferation of labeled cells surrounding or on the surface of co-cultured denture base resin slides were observed by use of phase-contrast microscope and fluorescent microscope directly. It was found that residual methyl methacrylate(MMA) in the denture base resin exhibited transient cytotoxicity to fibroblasts and this transient cytotoxicity could be eliminated by pre-extracting the resin with ddH 2O for a short time. This fact demonstrated that even slight cytotoxicity of materials could be detected through imaging of living cells near material or material touched. And it was suggested that imaging of living cells co-cultured with biomaterial is helpful to understanding biocompatibility of materials more accurately.