中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (38): 5650-5656.doi: 10.3969/j.issn.2095-4344.2016.38.004

• 纳米生物材料 nanobiomaterials • 上一篇    下一篇

丝素蛋白纳米羟基磷灰石复合材料的生物安全性

范纯泉1,叶晓健2
  

  1. 1解放军第175医院/厦门大学附属东南医院,全军骨科中心,福建省漳州市  363000;2解放军第二军医大学长征医院骨科,上海市  200001
  • 收稿日期:2016-07-05 出版日期:2016-09-16 发布日期:2016-09-16
  • 通讯作者: 叶晓健,博士,主任医师,教授,博士生导师,解放军第二军医大学长征医院骨科,上海市 200001
  • 作者简介:范纯泉,男,1980年生,福建省永安市人,汉族,2010年解放军第二军医大学毕业,博士,主治医师,主要从事脊柱外科及骨组织工程研究。
  • 基金资助:
    国家自然科学基金面上项目(81472071);军队医学科技青年培育计划(15QNP022);南京军区医学科技创新课题面上项目(15MS109)

Biological safety of silk fibroin/nano-hydroxyapatite composites

Fan Chun-quan1, Ye Xiao-jian2 
  

  1. 1Orthopedics Center of PLA, the 175th Hospital of PLA/Dongnan Hospital of Xiamen University, Zhangzhou 363000, Fujian Province, China; 2Department of Orthopedics, Changzheng Hospital, Second Military Medical University, Shanghai 200001, China
  • Received:2016-07-05 Online:2016-09-16 Published:2016-09-16
  • Contact: Ye Xiao-jian, M.D., Chief physician, Professor, Doctoral supervisor, Department of Orthopedics, Changzheng Hospital, Second Military Medical University, Shanghai 200001, China
  • About author:Fan Chun-quan, M.D., Attending physician, Orthopedics Center of PLA, the 175th Hospital of PLA/Dongnan Hospital of Xiamen University, Zhangzhou 363000, Fujian Province, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81472071; the Medical Incubation Program for the Youth in PLA, No. 15QNP022; the Medical Innovation Project of the Nanjing Military Region of Chinese PLA, No. 15MS109

摘要:

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文题释义:
丝素蛋白
:是从蚕丝中提取的天然高分子纤维蛋白,含量占蚕丝的70%-80%,含有18种氨基酸,其中甘氨酸、丙氨酸和丝氨酸约占总组成的80%以上。丝素蛋白具有良好的机械性能和理化性质。
生物材料的安全性:是指生物材料与人体之间相互作用下必须对人体无毒性、无致敏性,无刺激性,无遗传毒性,无致癌性,对人体组织、血液、免疫系统无不良反应。

背景:丝素蛋白具有良好的生物相容性、生物降解性、优越的力学性能,与纳米羟基磷灰石的复合可以模拟天然骨组织中的有机无机成分,可以弥补单纯纳米羟基磷灰石力学性能的不足。
目的:评价丝素蛋白/纳米羟基磷灰石复合材料的生物安全性。
方法:以氯化钙和磷酸氢二铵为原料,丝素蛋白作为调控纳米羟基磷灰石晶体生长的模板,通过共沉淀法合成了丝素蛋白/纳米羟基磷灰石类骨质复合材料。按照国际标准化组织(ISO10993)和国内(GB/T 16886)对于生物材料相容性的检测方法和要求,通过体外细胞毒性、全身急性毒性实验、溶血实验来评价丝素蛋白/纳米羟基磷灰石复合材料的生物安全性。
结果与结论:①丝素蛋白/纳米羟基磷灰石复合材料浸提液与L929细胞共培养后对细胞的形态、代谢及增殖无影响;②丝素蛋白/纳米羟基磷灰石复合材料浸提液腹腔注射到小白鼠体内,对小白鼠无明显不良反应;③丝素蛋白/纳米羟基磷灰石复合材料浸提液导致的静脉血溶血率为2.39%,小于5%的国际标准;④结果提示,丝素蛋白/纳米羟基磷灰石复合材料无细胞毒性,无全身急性毒性反应,不引起溶血反应,具有良好的生物安全性。

关键词: 生物材料, 骨生物材料, 丝素蛋白, 纳米羟基磷灰石, 组织工程, 生物安全性, 国家自然科学基金

Abstract:

BACKGROUND: Silk fibroin has excellent biocompatibility, biodegradability and unique mechanical properties. Its composite, silk fibroin/nano-hydroxyapatite, can simulate the composition and structure of nature bone tissue, contributing to remedying the insufficient mechanical properties of nano-hydroxyapatites.
OBJECTIVE: To observe the biological safety of silk fibroin/nano-hydroxyapatite composites.
METHODS: Silk fibroin/nano-hydroxyapetite composite biomaterial was synthesized by the coprecipitation method using silk fibroin, calcium chloride and diammonium phosphate as raw materials. According to the demands of International Standard Organization (ISO10993) and Technical Evaluation Standards of Biomedical Materials and Medical Instruments promulgated by Chinese Board of Health (GB/T 16886), experiments of cell toxicity in vitro, acute toxicity and hemolysis were investigated to evaluate the biocompatibility of silk fibroin/nano-hydroxyapetite composite.
RESULTS AND CONCLUSION: L929 cells co-cultured with silk fibroin/nano-hydroxyapatite composite leaching liquor had good cell morphology, metabolism and proliferation. The leaching extract of silk fibroin/nano-hydroxyapatite composite injected into mice intraperitoneally had no significant adverse reactions. And silk fibroin/nano-hydroxyapatite composite extracts caused 2.39% blood hemolysis, less than the international standards 5%. These experimental results on cell toxicity test in vitro, acute toxicity and hemolysis met the demands of ISO10993 and GB/T, which show the biological safety of the silk fibroin/nano-hydroxyapatite composite for clinical application.

Key words: Silk, Nanocomposites, Hydroxyapatites, Tissue Engineering

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