中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (22): 3530-3535.doi: 10.3969/j.issn.2095-4344.1279

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

纳米羟基磷灰石/胶原/聚乳酸新型可吸收材料的短期生物安全性

高  黎1,王书岩1,王  蕊1,许永华1,高静静1,张  丽2,刘文涛2
  

  1. 1郑州大学第一附属医院儿童口腔科,河南省郑州市  450001;2郑州大学材料科学与工程学院,河南省郑州市  450001
  • 收稿日期:2019-03-15 出版日期:2019-08-08 发布日期:2021-04-28
  • 通讯作者: 高黎,郑州大学第一附属医院儿童口腔科,河南省郑州市 450001
  • 作者简介:高黎,女,1973年生,汉族,博士,副主任医师,主要从事儿童口腔龋病及生物学方面的研究。
  • 基金资助:

    河南省高等学校重点科研项目计划(17A320008),项目负责人:高黎;河南省自然科学基金项目(182300410375),项目负责人:高黎

Short-term biosafety of novel absorbable nano-hydroxyapatite/collagen/poly(lactic acid) composite

Gao Li1, Wang Shuyan1, Wang Rui1, Xu Yonghua1, Gao Jingjing1, Zhang Li2, Liu Wentao2
  

  1. 1Department of Pediatric Dentistry, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450001, Henan Province, China; 2School of Material Science and Engineering, Zhengzhou University, Zhengzhou 450001, Henan Province, China
  • Received:2019-03-15 Online:2019-08-08 Published:2021-04-28
  • Contact: Gao Li, Department of Pediatric Dentistry, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450001, Henan Province, China
  • About author:Gao Li, MD, Associate chief physician, Department of Pediatric Dentistry, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450001, Henan Province, China
  • Supported by:

    The Key Scientific Research Project of Henan Higher Education Institutions, No. 17A320008 (to GL); the Natural Science Foundation of Henan Province, No. 182300410375 (to GL)

摘要:

文章快速阅读:

 

文题释义:
纳米羟基磷灰石/胶原/聚乳酸复合材料:聚乳酸是一类可降解的高分子生物材料,具有良好的生物相容性、生物可降解性、无毒副作用、易加工成型,且降解产物能参与到人体的新陈代谢,但强度差,在降解过程中产酸易引起周围组织无菌性炎症,且X射线下不显影;纳米羟基磷灰石/胶原是具有模仿天然骨组成成分和分级结构特征的复合体,具有良好的生物活性和骨传导性,且无毒无免疫原性,但其脆性大,不易成型;两者的复合可提高纳米羟基磷灰石/胶原/聚乳酸复合材料的相关性能,但其生物相容性和安全性还需深入探究。
生物安全性:是评价一种新生物材料性质的重要指标之一,是生物材料在临床应用之前必须进行的关键环节,是指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:课题组前期制备出具有良好生物活性的纳米羟基磷灰石/胶原/聚乳酸[nano-hydroxyapatite/ collagen/poly(L-lactic)acid,nHAC/PLA]复合材料。
目的:评估纳米羟基磷灰石/胶原/聚乳酸材料的生物安全性。
方法:取含聚乳酸分别为100,150,200 g/L的nHAC/PLA材料,制备浸提液,分别记为nHAC/PLA1、nHAC/PLA2、nHAC/PLA3。①细胞毒性实验:采用nHAC/PLA1、nHAC/PLA2、nHAC/PLA3浸提液、细胞培养基培养L929 细胞,采用MTT比色法评价材料的细胞毒性;②急性全身毒性实验:取C57小鼠(郑州大学动物实验中心提供),尾静脉分别注射nHAC/PLA1、nHAC/PLA2、nHAC/PLA3浸提液与生理盐水,注射后24,48,72 h,观察动物一般情况及体质量变化;③血清毒性实验:取SD大鼠(郑州大学动物实验中心提供),分别胃饲nHAC/PLA1、nHAC/PLA2、nHAC/PLA3浸提液与生理盐水,7 d后,采用酶联免疫法检测大鼠血清中白细胞介素1蛋白水平;④致敏实验:将25只白色豚鼠(郑州大学动物实验中心提供)随机分为5组:实验组采用nHAC/PLA1、nHAC/PLA2、nHAC/PLA3浸提液,阴性对照组采用生理盐水,阳性对照组采用体积分数5%甲醛溶液,经过皮内诱导、局部诱导和激发阶段后24,48,72 h,观察各组激发部位皮肤情况;⑤溶血实验:向nHAC/PLA1、nHAC/PLA2、nHAC/PLA3浸提液、生理盐水、蒸馏水中分别加入兔抗凝血,检测溶血率。实验方案经郑州大学伦理委员会审查批准。
结果与结论:纳米羟基磷灰石/胶原/聚乳酸材料的体外细胞毒性为 0 级,急性全身毒性、血清毒性、致敏性和溶血实验结果均为阴性,表明纳米羟基磷灰石/胶原/聚乳酸材料均具有良好的生物安全性。

关键词: 纳米羟基磷灰石/胶原, 聚乳酸, 可吸收材料, 生物安全性, 细胞毒性实验, 急性全身毒性实验, 血清毒性实验, 致敏实验, 溶血实验

Abstract:

BACKGROUND: A novel nano-hydroxyapatite/collagen/poly(lactic acid) composite was manufactured in our preliminary experiments.
OBJECTIVE: To evaluate the biosafety of nano-hydroxyapatite/collagen/poly(lactic acid) composite.
METHODS: Nano-hydroxyapatite/collagen/poly(lactic acid) composite was prepared into three kinds of leaching liquor containing 100, 150 and 200 g/L poly(lactic acid), namely, nHAC/PLA1, nHAC/PLA2, nHAC/PLA3. (1) Cytotoxicity test: L929 cells were cultured with nHAC/PLA1, nHAC/PLA2, nHAC/PLA3 leaching liquor and culture medium and cell toxicity was evaluated using MTT assay. (2) Acute systemic toxicity test: nHAC/PLA1, nHAC/PLA2, nHAC/PLA3 leaching liquor and normal saline were injected into C57 mice (Laboratory Animal Center of Zhengzhou University, China) via the tail vein. At 24, 48, 72 hours after injection, the general situation of mice was observed and body weight was recorded. (3) Serum toxicity test: SD rats (Laboratory Animal Center of Zhengzhou University) were intragastrically administered nHAC/PLA1, nHAC/PLA2, nHAC/PLA3 leaching liquor and normal saline. Seven days later, serum level of interleukin-1 protein was detected by enzyme-linked immunosorbent assay. (4) Skin sensitization test: 25 guinea pigs (Laboratory Animal Center of Zhengzhou University) were randomly treated with nHAC/PLA1, nHAC/PLA2, nHAC/PLA3 leaching liquor (experimental groups), normal saline (negative control group), and 5% formaldehyde (positive control group). At 24, 48 and 72 hours after intracutaneous induction, local induction, and provocation, skin sensitization reactions, including erythema and edema, were observed in each group. (5) Hemolysis test: anti-rabbit antibodies were added into the leaching liquor of test samples, saline and distilled water to determine the rate of hemolysis. The study was approved by Ethics Committee of Zhengzhou University, China.
RESULTS AND CONCLUSION: The in vitro cytotoxicity of nano-hydroxyapatite/collagen/poly(lactic acid) composite was graded 0. Negative results were obtained in acute systemic toxicity test, serum toxicity test, skin sensitization test, acute hemolytic test, and hemolysis test of nano-hydroxyapatite/collagen/poly(lactic acid) composite. These results suggest good biosafety of nano-hydroxyapatite/ collagen/poly(lactic acid) composite.

Key words: nano-hydroxyapatite/collagen, poly(lactic acid), absorbable material, biosafety, cytotoxicity test, acute systemic toxicity test, serum toxicity test, skin sensitization test, hemolysis test

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