中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (18): 2871-2879.doi: 10.3969/j.issn.2095-4344.1653

• 材料生物相容性 material biocompatibility • 上一篇    下一篇

羟基磷灰石复合二氧化锆泡沫陶瓷的理化性能与细胞化性能

柴  乐1,全仁夫2,吕建兰1,黄小龙2,张  灿1,任伟凡1,钱建胜1
  

  1. 1浙江中医药大学,浙江省杭州市  310053;2浙江中医药大学附属江南医院,浙江省杭州市  311200
  • 收稿日期:2018-11-08 出版日期:2019-06-28 发布日期:2019-06-28
  • 通讯作者: 全仁夫,主任医师,浙江中医药大学附属江南医院脊椎外科,浙江省杭州市 310053
  • 作者简介:柴乐,男,1991年生,河南省焦作市人,汉族,浙江中医药大学第三临床医学院在读硕士,主要从事组织工程研究。
  • 基金资助:

    浙江省医药卫生科技项目(2014KYA191),项目负责人:全仁夫;浙江省重大科技专项(2014C03031),项目负责人:全仁夫

Physicochemical properties and cellularization of hydroxyapatite/zirconium dioxide foam ceramics

Chai Le1, Quan Renfu2, Lü Jianlan1, Huang Xiaolong2, Zhang Can1, Ren Weifan1, Qian Jiansheng1
  

  1. 1Zhejiang Chinese Medical University, Hangzhou 310053, Zhejiang Province, China; 2Jiangnan Hospital, Zhejiang Chinese Medical University, Hangzhou 311200, Zhejiang Province, China
  • Received:2018-11-08 Online:2019-06-28 Published:2019-06-28
  • Contact: Quan Renfu, Chief physician, Jiangnan Hospital, Zhejiang Chinese Medical University, Hangzhou 311200, Zhejiang Province, China
  • About author:Chai Le, Master candidate, Zhejiang Chinese Medical University, Hangzhou 310053, Zhejiang Province, China
  • Supported by:

    the Medical and Health Scientific Program of Zhejiang Province, No. 2014KYA191 (to QRF); the Major Scientific Research Fund of Zhejiang Province, No. 2014C03031 (to QRF)

摘要:

文章快速阅读:

 

文题释义:
羟基磷灰石/二氧化锆:羟基磷灰石是骨的主要无机成分,具有优异的生物相容性,但其强度低、韧性差;二氧化锆(ZrO2)陶瓷材料具有较高的弯曲强度、断裂韧性和较低的弹性模量。故用二氧化锆作为羟基磷灰石增强体后,可获得力学性能和生物相容性俱佳的生物复合材料。
细胞毒性:是由细胞或化学物质引起的单纯细胞杀伤事件,不依赖于凋亡或坏死的细胞死亡机制,有时需要进行特定物质细胞毒性检测,比如药物筛选。细胞毒性检测主要是根据细胞膜通透性发生改变来进行的检测。
 
 
背景:研究已证实羟基磷灰石/二氧化锆泡沫陶瓷材料具有良好的促骨再生能力,但关于其遗传毒性还未见报道。
目的:检测羟基磷灰石/二氧化锆泡沫陶瓷材料的孔隙率与抗压强度,以及遗传毒性与细胞毒性,探索人工诱导多能干细胞来源间充质干细胞在羟基磷灰石/二氧化锆泡沫陶瓷材料上的成骨分化能力。
方法:在添加造孔剂的情况下,采用高温烧结法制备羟基磷灰石/二氧化锆泡沫陶瓷材料,检测其孔隙率与抗压强度。采用鼠伤寒沙门氏菌回复突变实验检测羟基磷灰石/二氧化锆泡沫陶瓷材料的遗传毒性。分别采用羟基磷灰石/二氧化锆泡沫陶瓷材料浸提液(实验组)、苯酚溶液(阳性对照组)、生理盐水(阴性对照组)培养L929细胞,24 h后,采用CCK-8法检测细胞毒性。将人工诱导多能干细胞来源间充质干细胞接种于羟基磷灰石/二氧化锆泡沫陶瓷材料上,培养第3,7,10,14天,检测细胞碱性磷酸酶分泌量;培养第14天,免疫组织化学法检测复合体细胞Ⅰ型胶原表达,扫描电镜观察细胞黏附情况。

结果与结论:①羟基磷灰石/二氧化锆泡沫陶瓷材料的孔隙率为(76.72±0.75)%,抗压强度为(11.60±1.35) MPa;②鼠伤寒沙门氏菌回复突变实验显示,羟基磷灰石/二氧化锆泡沫陶瓷材料的代谢产物无致突变、无致癌作用;③CCK-8实验显示,实验组的细胞存活率与阴性对照组比较差异无显著性意义(P > 0.05),但明显高于阳性对照组(P < 0.05);④随着培养时间的延长,细胞碱性磷酸酶分泌量逐渐增加,各时间点间两两比较差异均有显著性意义(P < 0.05);⑤培养第14天,大量人工诱导多能干细胞来源间充质干细胞均匀分布于羟基磷灰石/二氧化锆泡沫陶瓷材料表面,细胞形态及生长良好,并且Ⅰ型胶原表达较多;⑥结果表明,羟基磷灰石/二氧化锆泡沫陶瓷材料具备一定的抗压能力,无致突变作用和细胞毒性,可促进人工诱导多能干细胞来源间充质干细胞的成骨分化。

关键词: 羟基磷灰石, 二氧化锆, 抗压强度, 遗传毒性, 细胞毒性, 成骨分化, 细胞毒性检测, 复合体细胞Ⅰ型胶原表达

Abstract:

BACKGROUND: Studies have confirmed that hydroxyapatite/zirconium dioxide foam ceramic materials have the ability to promote bone regeneration, but their genotoxicity has not been reported.
OBJECTIVE: To detect the porosity, compressive strength, genotoxicity and cytotoxicity of hydroxyapatite/zirconium dioxide foam ceramics and to explore the osteogenic differentiation of artificially induced pluripotent stem cells cultured on the hydroxyapatite/zirconium dioxide foam ceramics.
METHODS: The hydroxyapatite/zirconium dioxide foam ceramics was prepared by high temperature sintering method with addition of pore-forming agent. The porosity and compressive strength of hydroxyapatite/zirconium dioxide foam ceramics were detected, and the genotoxicity of the material were tested using Salmonella typhimurium reverse mutation test. L929 cells were cultured with hydroxyapatite/zirconium dioxide foam ceramics extract (experimental group), phenol solution (positive control group), and normal saline (negative control group). After 24 hours of culture, the cytotoxicity was detected using cell counting kit-8 toxicity test. Artificially induced pluripotent stem cells-derived mesenchymal stem cells were inoculated onto the hydroxyapatite/zirconium dioxide foam ceramics. On the 3rd, 7th, 10th and 14th days of culture, the amount of alkaline phosphatase secreted by the cells was detected. On the 14th day of culture, the expression of type I collagen in the cells was detected by immunohistochemistry, and cell adhesion was observed by scanning electron microscope.
RESULTS AND CONCLUSION: (1) The porosity and compressive strength of hydroxyapatite/zirconium dioxide foam ceramics were (76.72±0.75)% and (11.60±1.35) MPa, respectively. (2) In the Salmonella typhimurium reverse mutation test, the metabolites of hydroxyapatite/zirconium dioxide foam ceramics were not mutagenic or carcinogenic. (3) In the cell counting kit8 test, the survival rate of the cells in the experimental group was close to that in the negative control group (P > 0.05), but still significantly higher than that in the positive control group (P < 0.05). (4) With the extension of culture time, the secretion amount of alkaline phosphatase was increased gradually, and there was significant difference at different observational time points (P < 0.05). (5) On the 14th day of culture, a great amount of artificially induced pluripotent stem cells-derived mesenchymal stem cells evenly distributed and grew well on the surface of hydroxyapatite/zirconium dioxide foam ceramics, and these cells had good morphology and highly expressed type I collagen. To conclude, the hydroxyapatite/zirconium dioxide foam ceramics has a certain compressive capacity and does not exhibit mutagenic effects and cytotoxicity, and promote the osteogenic differentiation of artificially induced pluripotent stem cells-derived mesenchymal stem cells cultured on its surface.

Key words: hydroxyapatite, zirconium dioxide, compressive strength, genotoxicity, cytotoxicity, osteogenic differentiation, cytotoxicity test, type I collagen expression in complex cells

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