中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (22): 3557-3562.doi: 10.3969/j.issn.2095-4344.0755

• 材料生物相容性 material biocompatibility • 上一篇    下一篇

电活性聚苯胺/聚乳酸支架的制备及生物相容性

王玲玲,崔志明,徐冠华,李卫东,保国锋,孙郁雨,陈佳佳,张金龙   

  1. 南通大学第二附属医院脊柱外科,江苏省南通市 226001
  • 收稿日期:2017-12-12 出版日期:2018-08-08 发布日期:2018-08-08
  • 通讯作者: 徐冠华,博士,副主任医师,南通大学第二附属医院脊柱外科,江苏省南通市 226001
  • 作者简介:王玲玲,女,1983年生,江苏省淮安市人,汉族,主治医师,主要从事脊柱外科的临床和基础研究。
  • 基金资助:

    江苏省卫生科研项目(Z201316);江苏省六大人才高峰第十批次高层次人才资助项目(2013-WSW-007);江苏省中医药管理局科技项目(LB13020);南通市重大科技计划项目(HS2014002)

Preparation and biocompatibility of an electroactive polyaniline/poly(lactic-acid) scaffold

Wang Ling-ling, Cui Zhi-ming, Xu Guan-hua, Li Wei-dong, Bao Guo-feng, Sun Yu-yu, Chen Jia-jia, Zhang Jin-long   

  1. Department of Spinal Surgery, the Second Affiliated Hospital of Nantong University, Nantong 226001, Jiangsu Province, China
  • Received:2017-12-12 Online:2018-08-08 Published:2018-08-08
  • Contact: Xu Guan-hua, M.D., Associate chief physician, Department of Spinal Surgery, the Second Affiliated Hospital of Nantong University, Nantong 226001, Jiangsu Province, China
  • About author:Wang Ling-ling, Attending physician, Department of Spinal Surgery, the Second Affiliated Hospital of Nantong University, Nantong 226001, Jiangsu Province, China
  • Supported by:

    Health Research Project of Jiangsu Province, No. Z201316; the 10th Batch High-Level Talent Project in Jiangsu Province, No. 2013-WSW-007; the Science and Technology Project of Jiangsu Provincial Traditional Chinese Medicine Administration, No. LB13020; the Major Science and Technology Project of Nantong Municipality, No. HS2014002

摘要:

文章快速阅读:

 

文题释义:
聚苯胺:一种高分子化合物,具有特殊的电学、光学性质,经掺杂后可具有导电性及电化学性能;聚苯胺的聚掺杂和脱掺杂完全可逆,掺杂度受pH值和电位等因素的影响,并表现为外观颜色的相应变化;聚苯胺因其具有的原料易得、合成工艺简单、化学及环境稳定性好等特点而得到了广泛研究和应用。
聚乳酸:是以乳酸为主要原料聚合得到的聚合物,也称为聚丙交酯,属于聚酯家族,具有无毒性、生物相容性好、在体内可完全降解吸收及具有良好的抗拉强度和延展度等优点,但不足之处是材料力学强度较低,降解产物呈酸性而易引起体内无痛炎症反应,因此常与其他材料复合应用。
 
 
背景:有研究证实在电刺激条件下,聚苯胺/聚乳酸复合支架可促进神经干细胞突起的生长。
目的:制备电活性聚苯胺/聚乳酸支架,观察其与大鼠嗅鞘细胞的生物相容性。
方法:采用乳液聚合的方法制备聚苯胺/聚乳酸膜,电镜下观察其形态,测定其电导率。将SD乳鼠嗅鞘细胞分别接种于聚苯胺/聚乳酸膜上(实验组)与多聚赖氨酸包被的玻片上(对照组),进行细胞增殖、细胞黏附率测定及免疫荧光抗体标记观察。

结果与结论:①扫描电镜下,聚苯胺/聚乳酸膜表面平整、均匀,可见为细小纤维形成的网格状结构,其电导率为1.5×10-5 S/cm;②培养1,3,5,7 d,实验组的细胞相对增殖率均在90%以上,细胞毒性为Ⅰ级;         ③培养7 d后,实验组细胞吸附率高于对照组(P < 0.05);④培养7 d后免疫荧光检测显示,对照组S-100阳性细胞的数量及胞体面积与实验组无明显性差异(P > 0.05),对照组S-100阳性细胞周长明显小于实验组(P < 0.05);⑤结果表明,制备的聚苯胺/聚乳酸膜与嗅鞘细胞具有良好的生物相容性。

ORCID: 0000-0001-9629-1751(王玲玲)

关键词: 神经材料, 导电生物材料, 聚苯胺, 聚乳酸, 嗅鞘细胞, 生物相容性, 共培养, 生物材料

Abstract:

BACKGROUND: Previous studies have confirmed that polyaniline/poly(lactic-acid) scaffold could promote the growth of neural stem cell processes in the condition of electrical stimulation.

OBJECTIVE: To prepare an electroactive polyaniline/poly(lactic-acid) scaffold and to investigate its biocompatibility with rat olfactory ensheathing cells.
METHODS: Olfactory ensheathing cells of Sprague-Dawley neonatal rats were inoculated onto the polyaniline/poly(lactic acid) film (experimental group) and poly lysine coating slides (control group). Cell proliferation and cell adhesion rate were detected, and the cells were observed with immunofluorescence histochemistry.

RESULTS AND CONCLUSION: (1) Smooth and even polyaniline/poly(lactic acid) film was visible under electron microscopy, with a grid structure formed by fine fibers, and its conductivity was 1.5×10-5 S/cm. (2) At 1, 3, 5, 7 days after co-culture, the cell relative growth rates were all above 90%, and the cytotoxicity was graded I. (3) At 7 days after co-culture, the cell adhesion rate in the experimental group was significantly higher than that in the control group (P < 0.05). (4) At 7 days after co-culture, immunofluorescence results showed that there was no obvious difference between the two groups in the number or area of S-100 positive cells (P > 0.05), while the cell perimeter in the experimental group was significantly higher than that in the control group (P < 0.05). To conclude, the prepared polyaniline/poly(lactic acid) film has good biocompatibility with olfactory ensheathing cells.

 

Key words: Biocompatible Materials, Spinal Cord Injuries, Tissue Engineering

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