中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (2): 280-285.doi: 10.3969/j.issn.2095-4344.2017.02.021

• 复合支架材料 composite scaffold materials • 上一篇    下一篇

3D打印丝素蛋白/胶原蛋白支架的制备及性能

孙  凯1,李瑞欣2,范  猛1,李轶津1,董宝康1,李  晖3
  

  1. 1天津市第一中心医院,天津市  300192;2军事医学科学院卫生装备研究所,天津市  300161;3天津医科大学总医院骨科,天津市  300052
  • 收稿日期:2016-11-03 出版日期:2017-01-18 发布日期:2017-02-27
  • 通讯作者: 李晖,天津医科大学总医院骨科,天津市 300052 李瑞欣,副研究员,军事医学科学院卫生装备研究所,天津市 300161
  • 作者简介:孙凯,男,1989年生,山东省济宁市人,汉族,2015年天津医科大学毕业,硕士,主要从事骨关节疾病及生物材料的制备研究。
  • 基金资助:

    国家自然科学基金资助项目(31470935)

Three-dimensional printed silk fibroin/collagen scaffold and its performance

Sun Kai1, Li Rui-xin2, Fan Meng1, Li Yi-jin1, Dong Bao-kang1, Li Hui3 
  

  1. 1Tianjin First Central Hospital, Tianjin 300192, China; 2Institute of Medical Equipment, Academy of Military and Medical Sciences, Tianjin 300161, China; 3Department of Orthopaedics, General Hospital of Tianjin Medical University, Tianjin 300052, China
  • Received:2016-11-03 Online:2017-01-18 Published:2017-02-27
  • Contact: Li Hui, Department of Orthopaedics, General Hospital of Tianjin Medical University, Tianjin 300052, China Li Rui-xin, Associate researcher, Institute of Medical Equipment, Academy of Military and Medical Sciences, Tianjin 300161, China
  • About author:Sun Kai, Master, Tianjin First Central Hospital, Tianjin 300192, China
  • Supported by:

    the National Natural Science Foundation of China, No. 31470935

摘要:

文章快速阅读:

 

文题释义:
3D打印技术
:是指在计算机控制下,根据物体的计算机辅助设计(CAD)模型或计算机断层扫描(CT)等数据,通过材料的精确3D堆积,快速制造任意复杂形状3D物体的新型数字化成型技术。3D打印技术的基本制造过程是按照分层制造、逐层叠加的原理。
3D打印技术主要特点和优势:①高分辨率:分辨率高达2 880×1 440,其喷头射出墨滴直径与人体组织器官中细胞分布很相似,这使得利用喷墨打印技术精确的种植细胞和打印生物组织细微结构成为可能;②高速打印:3D打印机打印一张A4纸大小的照片只需大约1 min,可以运用喷墨打印技术快速的打印和组装生物活性组织;③非接触性打印:这使得喷墨打印机不仅能在纸上打印,也可在固体支架材料和液体上打印,而且非接触性打印也减少了打印过程中污染的概率,有利于了后续支架上细胞的培养。

背景:目前,大量研究者致力于寻求可制备出具有优良孔隙、力学性能佳、生物相容性好的三维多孔支架材料方法,其中3D打印技术的快速发展为此提供了较好的技术支持。
目的:采用3D打印技术制备丝素蛋白/胶原蛋白复合支架,并对其进行表征。
方法:采用3D打印技术制备丝素蛋白/胶原蛋白复合支架,设置丝素蛋白与胶原蛋白的质量比分别为 4∶2、4∶4,检测两种复合支架的孔隙率、吸水膨胀率、力学性能及孔径。将第3代大鼠骨髓间充质干细胞接种于两种复合支架上,接种13 d时进行MTT检测,接种14 d时进行苏木精-伊红染色和扫描电镜观察。
结果与结论:①4∶2复合支架组的孔隙率、孔径、吸水膨胀率均大于4∶4复合支架组(P < 0.05),两组复合支架的弹性模量比较差异无显著性意义;②随着接种时间的延长,两组复合支架上的骨髓间充质干细胞数量逐渐增加,4∶2复合支架组细胞数量始终多于4∶4复合支架组(P < 0.05);③4∶2复合支架内部细胞较多且分布均匀,4∶4复合支架内部细胞较少且分布不均匀;④结果表明,将丝素蛋白与胶原蛋白以质量比 4∶2混合,采用3D打印技术制备的丝素蛋白/胶原蛋白复合支架具有良好的理化性能和细胞相容性。

关键词: 生物材料, 材料相容性, 丝素蛋白, 3D打印, 胶原蛋白, 质量比, 复合支架, 国家自然科学基金

Abstract:

BACKGROUND: Searching for a porous three-dimensional (3D) scaffold holding good porosity, mechanical property and biocompatibility has become a hot spot, in which, 3D printing technology also plays apart.
OBJECTIVE: To prepare silk fibroin/collagen scaffolds using 3D printing technology and detect its performance.
METHODS: Silk fibroin/collagen scaffolds were constructed using 3D printing technology, and the silk fibroin/collagen mass ratio was 4:2 (group A) and 4:4 (group B), respectively. The porosity, water absorption expansion rate, mechanical properties and pore size of the composite scaffolds were detected. The passage 3 rat bone marrow mesenchymal stem cells were seeded onto the two scaffolds. The cell proliferation was detected using MTT assay at 13 days of culture, and the cell morphology was observed by hematoxylin-eosin staining and scanning electron microscope at 14 days of culture.
RESULTS AND CONCLUSION: The porosity, pore size, and water absorption expansion rate of group A were significantly larger than those of group B (P < 0.05), while the elasticity modulus showed no significant difference between groups. Bone marrow mesenchymal stem cells on the two scaffolds increased gradually with time, especially in the group A (P < 0.05). Abundant cells distributed evenly in the group A, while few cells distributed unevenly in the group B. These results suggest that the 3D printed scaffolds composed by silk fibroin/collagen mass ratio of 4:2 holds good physicochemical performance and cytocompatibility.

Key words: Silk, Collagen, Tissue Engineering

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