中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (34): 5104-5109.doi: 10.3969/j.issn.2095-4344.2016.34.014

• 药物控释材料 drug delivery materials • 上一篇    下一篇

Cytodext-3微载体/藻酸钠水凝胶作为可注射性支架构建组织工程软骨的可行性

尹合勇1,2,孙 振1,李 盼3,余晓明1,徐亦驰1,孙 逊1,2,肖 波1,王 玉1,汪爱媛1,郭全义1,徐文静1,卢世璧1,彭 江1   

  1. 1解放军总医院全军骨科研究所,北京市  1008532南开大学医学院,天津市  3000713河北医科大学,河北省石家庄市 050017
  • 收稿日期:2016-05-29 出版日期:2016-08-19 发布日期:2016-08-19
  • 通讯作者: 彭江,博士,副研究员,硕士生导师,解放军总医院全军骨科研究所,北京市 100853
  • 作者简介:尹合勇,男,1990年生,湖北省黄石市人,汉族,硕士,主要从事软骨组织工程研究。
  • 基金资助:

    北京市科技专项(Z141107004414044);国家高技术研究发展计划(863)资助项目(2012AA020502)

 Constructing injectable tissue-engineered cartilage using cytodex-3 microcarrier and alginate hydrogel

Yin He-yong1, 2, Sun Zhen1, Li Pan3, Yu Xiao-ming1, Xu Yi-chi1, Sun Xun1, 2, Xiao Bo1, Wang Yu1,    Wang Ai-yuan1, Guo Quan-yi1, Xu Wen-jing1, Lu Shi-bi1, Peng Jiang1   

  1. 1PLA Institute of Orthopedics, General Hospital of Chinese PLA, Beijing 100853, China; 2School of Medicine, Nankai University, Tianjin 300071, China; 3Hebei Medical University, Shijiazhuang 050017, Hebei Province, China
  • Received:2016-05-29 Online:2016-08-19 Published:2016-08-19
  • Contact: Peng Jiang, M.D., Associate researcher, Master’s supervisor, PLA Institute of Orthopedics, General Hospital of Chinese PLA, Beijing 100853, China;
  • About author:Yin He-yong, Master, PLA Institute of Orthopedics, General Hospital of Chinese PLA, Beijing 100853, China; School of Medicine, Nankai University, Tianjin 300071, China
  • Supported by:

    the Beijing Science and Technology Project, No. Z141107004414044; the National High-tech Research and Development Program of China (863), No. 2012AA020502

摘要:

文章快速阅读:

 

文题释义:
微载体培养
:是一种特殊的细胞培养技术,因其具有扩增种子细胞并维持细胞表型的特点,成为动物细胞大规模培养的新方法。目前,微载体数量颇多,包括聚苯乙烯微载体、液膜微载体、中空多孔微载体、大孔明胶微载体及磁性微载体等。Cytodex-3微载体是目前使用比较广泛的一种商业化微载体。
Cytodext-3微载体/藻酸钠水凝胶:微载体可负载细胞、生长因子等,而且具有流动性,也可用作可注射性支架材料,但单纯微载体注射至缺损处面临着可塑性差等问题。将藻酸钠水凝胶与商业化Cytodext-3微载体复合,构建了新型可注射性微载体/水凝胶复合支架。微载体与藻酸钠水凝胶的复合具有协同作用,藻酸钠水凝胶包裹微载体,使微载体具有可塑性,微载体的加入显著提高了藻酸钠水凝胶的力学强度。


背景:藻酸钠水凝胶和微载体均可作为注射性支架材料,但存在力学性能差和可塑性差等缺点。
目的:探索Cytodext-3微载体与藻酸钠水凝胶复合体作为可注射性组织工程软骨支架的可行性。
方法:制备可注射性Cytodext-3微载体/藻酸钠水凝胶复合支架、可注射藻酸钠水凝胶支架,检测两组支架的力学性能。将软骨细胞与Cytodext-3微载体置于生物反应中培养,获得负载软骨细胞的微载体,再与藻酸钠水凝胶复合,作为实验组;将软骨细胞与可注射藻酸钠水凝胶支架共培养,作为对照组,检测两组支架内的细胞活性、细胞合成DNA与糖胺聚糖的能力。
结果与结论:①可注射性Cytodext-3微载体/藻酸钠水凝胶复合支架杨氏弹性模量高于可注射藻酸钠水凝胶支架(P < 0.05);②对照组内软骨细胞呈圆形形状,均匀分布于藻酸钠凝胶中;实验组软骨细胞帖附于微载体表面,均匀分布于支架中;培养1 d后,两组支架内部可见,亦可见大量死亡的软骨细胞;14 d后,两组支架内均未发现死亡细胞,大量增殖软骨细胞保持较高的细胞活性,实验组细胞数量明显多于对照组;③随着时间的延长,两组细胞合成DNA与糖胺聚糖的含量逐渐增多,实验组DNA与糖胺聚糖含量高于对照组(P < 0.05);④结果表明:Cytodext-3微载体/藻酸钠水凝胶复合体有望作为一种良好的具有可注射性的组织工程软骨支架。

ORCID: 0000-0002-0033-9501(尹合勇)

关键词: 生物材料, 软骨生物材料, 微载体, 可注射性, 藻酸钠, 软骨组织工程

Abstract:

BACKGROUND: Alginate hydrogel and microcarrier both can be used as injectable scaffolds, but their shortcomings such as poor mechanical property and poor plasticity remain unresolved.
OBJIECTIVE: To explore the feasibility of constructing an injectable tissue-engineered cartilage with cytodex-3 microcarrier/alginate hydrogel composite.
METHODS: Injectable cytodex-3 microcarrier/alginate hydrogel composite scaffold and injectable alginate hydrogel scaffold were established, and the mechanical properties of the two scaffolds were detected. Chondrocytes-seeded cytodex-3 microcarrier was obtained after incubated in the bioreactor, and then composited with alginate hydrogel as experimental group; chondrocytes were co-cultured with alginate hydrogel as control group. Subsequently, cell viability and ability of DNA and glycosaminoglycan synthesis were detected.
RESULTS AND CONCLUSION: The Young’s modulus of the experimental group was significantly higher than that of the control group (P < 0.05). And in the control group, chondrocytes were in a round shape and evenly distributed in the alginate hydrogel; in the experimental group, chondrocytes adhered on the scaffold surface and evenly distributed in the scaffold. After 1 day of culture, both viable and numerous dead chondrocytes could be found in both two scaffolds; and after 14-day culture, there were no dead chondrocytes in both two scaffolds, abundant proliferating chondrocytes maintained a high cell viability, and the number of chondrocytes in the experimental group was significantly higer than that of the control group. What’s more, the contents of DNA and glycosaminoglycans were in a rise with time in both two groups, which were significantly higher in the experimental group than the control group (P < 0.05). These results suggest that the cytodex-3 microcarrier/alginate hydrogel composite is a promising injectable scaffold in cartilage tissue engineering.

中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程

Key words: Chondrocytes, Stents, Tissue Engineering

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