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-  2016 

两种聚乳酸改性材料的体外对比实验研究

DOI: doi:10.7507/1001-5515.20160147

Keywords: 聚乳酸, 聚乙醇酸, 壳聚糖, 嗅鞘细胞, 生物相容性

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Abstract:

为对比两种聚乳酸改性材料聚乳酸-壳聚糖(PLA-CTS)和聚乳酸-乙醇酸(PLA-PGA)的特性,本实验分别制备PLA-CTS和PLA-PGA支架,电镜下观察支架形态,计算孔隙率,测定支架降解后溶液的pH值。同时培养大鼠嗅鞘细胞(OECs),分别与两种支架混合培养,同时将单纯培养的OECs做为对照组,测定并比较两种支架上OECs的增殖力、黏附率,并在荧光镜下观察支架上OECs的生长情况。结果显示,制备的PLA-CTS和PLA-PGA支架均为多孔立体结构,PLA-CTS支架孔隙率为91%,PLA-PGA支架孔隙率为87%。随着时间延长,支架降解液的pH值逐渐下降,而PLA-PGA的下降速度要快于PLA-CTS。OECs接种到两种支架后,大多数能在支架上生长良好,MTT检测及荧光显微镜下观察细胞核数目两组差异无统计学意义,但PLA-CTS组的细胞黏附率要明显高于PLA-PGA。结论表明与PLA-PGA相比,PLA-CTS可能是做为OECs支架更佳的材料

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