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应用改性聚乳酸构建复层组织工程皮肤的可行性研究

王宗良1,师铁英2,石 毅1,冯 颖1,崔百元3,李俊锋3,颜炜群1,周余来1   

  1. 1.吉林大学药学院生物工程教研室, 吉林 长春130021; 2.吉林省四平医学院生物化学教研室, 吉林 四平 136000;3.吉林大学化学学院化学工程与应用化学系, 吉林 长春 130021
  • 收稿日期:2006-11-30 修回日期:1900-01-01 出版日期:2007-07-28 发布日期:2007-07-28
  • 通讯作者: 周余来

Feasibility study on reconstruction of tissue engineering artificial skin with modified PLA

WANG Zhong-liang1,SHI Tie-ying2,SHI Yi1,FENG Ying1,CUI Bai-yuan3,LI Jun-feng3,YAN Wei-qun1,ZHOU Yu-lai1   

  1. 1.Department of Bioengineering, School of Pharmacy,Jilin University, Changchun
  • Received:2006-11-30 Revised:1900-01-01 Online:2007-07-28 Published:2007-07-28
  • Contact: ZHOU Yu-lai

摘要: 目的:以改性聚乳酸为细胞外基质网架,探索利用其构建复层组织工程皮肤的可行性。方法:取出生24 h以内的Wistar大鼠背部皮肤,以Dispase-trypsin双酶消化分离培养表皮角质形成细胞;以Ⅰ型胶原酶消化分离培养真皮成纤维细胞。采用盐析法制备机械性能得到部分改进的聚乳酸多孔泡沫支架,向支架接种真皮成纤维细胞(密度为3.0×105cell•mL-1)和表皮角质形成细胞(密度为5.0×105cell•mL-1),体外培养1周,构建复层组织工程皮肤,并取培养的皮肤进行切片检测。结果:复层组织工程皮肤在结构上与正常皮肤相似,具有真皮、表皮双层结构。改性聚乳酸网架上有双层细胞生长,生长的细胞与网架接触,并且在其表面形成较为明显而连续的细胞层。结论:双醛淀粉作为良好的增柔剂在改善聚乳酸网架机械性能的同时,也使其具有良好的细胞相容性,不影响细胞的生长增殖和代谢,可以进一步用作组织工程皮肤的支架材料。

关键词: 皮肤, 聚乳酸, 双醛淀粉, 大鼠, Wistar

Abstract: Abstract:Objective To explore the possibility of reconstruction of tissue engineering artificial skin with modified poly lactic acid (PLA).Methods Fibroblasts(FB) and keratinocytes(KC) from new born rats isolated by treatment of Dispase-trypsin and collaganase were cultivated.Tissue engineering artificial skin was reconstructed by planting subcultured FB(3.0×105cell•mL-1)and KC(5.0×105cell•mL-1)separately onto the modified PLA,which was made by special ways and it’〖KG-3〗s mechanism function was improved,and cultivated for one week. Results The artificial skin was composed of epidermis and dermis and similar with natural skin.The skin consisted of FB and KC was at various proliferation and differentiation stages.FB and KC increased on the surface of PLA. Conclusion Dialdehyde starch(DAS) not only improves the mechanism function of PLA,but also has good effect on cells.And it doesn’〖KG-3〗t affect the growth and metabolism of cells.So it is feasible as scaffold of tissue engineering artificial skin.

Key words: skin, poly lactic acid, dialdehyde starch, rats, Wistar

中图分类号: 

  • R318.08