中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (29): 5269-5274.doi: 10.3969/j.issn.2095-4344.2013.29.002

• 组织工程骨及软骨材料 tissue-engineered bone and cartilage materials • 上一篇    下一篇

丝素/壳聚糖/纳米羟基磷灰石构建的骨组织工程支架

叶 鹏1,田仁元1,黄文良2,马立坤3,邓 江4   

  1. 遵义医学院,12011级骨外科研究生,3 2012级骨外科研究生,贵州省遵义市  563003;遵义医学院第三附属医院,2骨一病区,4骨科,贵州省遵义市  563003
  • 出版日期:2013-07-22 发布日期:2013-07-22
  • 通讯作者: 邓江,教授,主任医师,研究生导师,遵义医学院第三附属医院骨科,贵州省遵义市 563003
  • 作者简介:叶鹏★,男,1988年生,重庆市人,汉族,遵义医学院在读硕士,主要从事骨关节创伤方面的研究。 807346006@qq.com
  • 基金资助:

    贵州省科学技术基金项目(黔科合SY字[2010] 3101),项目名称:《 SF-CS-nHA支架与基因修饰后BMSCs构建人工骨种植体的成骨作用研究》;贵州省社会攻关项目(遵义市科合社字 [2010] 015号),项目名称:《RGD表面修饰SF-CS-nHA材料复合携带目的基因的BMSCs成骨性能研究》;贵州省省长基金项目(2011(25)),项目名称:《 rhBMP-2缓释系统/自体松质骨复合生物支架修复骨缺损的研究》

Silk fibroin/chitosan/nano hydroxyapatite complicated scaffolds for bone tissue engineering

Ye Peng1, Tian Ren-yuan1, Huang Wen-liang2, Ma Li-kun3, Deng Jiang4   

  1. 1Grade 2011, 3Grade 2012, Zunyi Medical University, Zunyi  563003, Guizhou Province, China; 2First Ward of Orthopedics Department, 4Department of Orthopedics, Third Affiliated Hospital of Zunyi Medical University, Zunyi  563003, Guizhou Province, China
  • Online:2013-07-22 Published:2013-07-22
  • Contact: Deng Jiang, Professor, Chief physician, Master’s supervisor, Department of Orthopedics, Third Affiliated Hospital of Zunyi Medical University, Zunyi 563003, Guizhou Province, China
  • About author:Ye Peng★, Studying for master’s degree, Grade 2011, Zunyi Medical University, Zunyi 563003, Guizhou Province, China 807346006@qq.com
  • Supported by:

    the Scientific and Technological Foundation of Guizhou Province, No. [2010] 3101*; the Social Tackle Key Program of Guizhou Province, No. [2010] 015*; the Governor Fund of Guizhou Province, No. 2011(25)*

摘要:

背景:丝素蛋白、壳聚糖及纳米羟基磷灰石均是天然材料,具有良好的生物活性和理化特性,作为人体组织工程材料已取得了一定的成果,但3种材料在单独应用的研究中还存在一定的缺陷。
目的:制作丝素蛋白/壳聚糖/纳米羟基磷灰石三维支架材料,分析其特性。
方法:将丝素蛋白、壳聚糖、纳米羟基磷灰石分别配制成2%的溶液后,分别按照 1∶1∶0.5,1∶1∶1, 1∶1∶1.5 的体积比混合,采用冷冻干燥与化学交联技术制备成三维复合支架材料。检测三维复合支架的孔隙率、吸水膨胀率及热水溶失率,采用材料力学测验机测试干燥三维复合支架材料的拉伸和压缩弹性模量,采用扫描电镜检测三维复合支架的孔径。
结果与结论:丝素蛋白/壳聚糖/纳米羟基磷灰石三维复合支架在干燥状态下呈白色,无特殊气味,为稳定固态的圆柱体,触之有明显的抗压能力和弹性。随着复合支架材料中纳米羟基磷灰石含量的增高,支架材料的孔隙率、吸水膨胀率、平均孔径呈逐渐减小趋势,热水溶失率及抗压能力表现出相反的趋势,结果显示以1∶1∶1体积比制作的支架更符合骨替代材料要求,其平均孔径为85.67 µm、吸水膨胀率的为(135.65±4.56)%、热水溶失率为(22.84±1.06)%,支架材料内部孔隙均匀,呈现网状结构,孔隙之间交通发达,网状结构本身约10 µm。

关键词: 生物材料, 组织工程骨材料, 丝素蛋白, 壳聚糖, 纳米羟基磷灰石, 三维复合支架, 省级基金

Abstract:

BACKGROUND: Silk fibroin, chitosan, and nano hydroxyapatite are natural materials, and they all have good biological activity and physical or chemical properties. As tissue engineering materials, they have been already widely used in clinic or research work, but there are some defects in the application of these three kinds of materials.
OBJECTIVE: To discuss the preparation and characteristics of silk fibroin/chitosan/nano hydroxyapatite complicated scaffolds which could be used in bone tissue engineering.
METHODS: Silk fibroin, chitosan, and nano hydroxyapatite were separately prepared into 2% solution, and then mixed at the ratio of 1:1:0.5, 1:1:1, 1:1:1.5 respectively. The three-dimensional complicated scaffolds were prepared by those mixed liquids through repeated freeze drying and chemical crosslinking technology. Scanning electron microscope was used to detect the pore size of the scaffolds. Porosity, water absorption rate, and hot-water loss rate were determined. Mechanical tester was used to measure the tensile and compressive modulus of dried three-dimensional scaffolds.
RESULTS AND CONCLUSION: The silk fibroin/chitosan/nano hydroxyapatite complicated scaffold in the dry state had no special smell, appeared to be a stabilized solid cylinder, and exhibited clear resiliency and flexibility with a touch. With the increased content of nano hydroxyapatite, the porosity, water absorption rate and average pore size of the scaffolds appeared to be decreased, while the hot-water loss rate and compressive strength were increased. The scaffold prepared at 1:1:1 was better for bone tissue engineering, and the average pore size, water absorption rate and hot-water loss rate were 85.67 µm, (135.65±4.56)% and (22.84±1.06)%, respectively, closer to the needs of the bone tissue engineering. Uniform pores were found within the scaffold at 1:1:1, showing the network structure, developed transport among pores, and the network structure was approximately 10 μm.

Key words: biomaterials, tissue-engineered bone materials, silk fibroin, chitosan, nano hydroxyapatite, three-dimensional complicated scaffold, provincial grants-supported paper

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