中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (18): 2900-2908.doi: 10.3969/j.issn.2095-4344.1728

• 细胞外基质材料 extracellular matrix materials • 上一篇    下一篇

琼脂糖/明胶/透明质酸/细胞外基质水凝胶的制备与性能表征

李静静1,郭  璇1,解  军1,黄  磊1,索金荣2,傅松涛1,2,3   

  1. 1山西医科大学基础医学院,山西省太原市  030001;2山西宾大干细胞科技有限公司,山西省太原市  030001;3山西省生物医药健康研究生教育创新中心,山西省太原市  030001
  • 收稿日期:2019-02-19 出版日期:2019-06-28 发布日期:2019-06-28
  • 通讯作者: 傅松涛,教授,山西医科大学基础医学院,山西省太原市 030001;山西宾大干细胞科技有限公司,山西省太原市 030001;山西省生物医药健康研究生教育创新中心,山西省太原市 030001
  • 作者简介:李静静,女,1990年生,河南省驻马店市人,汉族,山西医科大学在读硕士,主要从事组织修复与再生及生物支架材料研究。

Preparation of agarose/gelatin/hyaluronic acid/extracellular matrix hydrogel and its property characterization

Li Jingjing1, Guo Xuan1, Xie Jun1, Huang Lei1, Suo Jinrong2, Fu Songtao1, 2, 3 
  

  1. 1School of Basic Sciences, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China; 2Shanxi Binda Stem Cell Technology Co., Ltd., Taiyuan 030001, Shanxi Province, China; 3Shanxi Provincial Biomedical Health Graduate Education Innovation Center, Taiyuan 030001, Shanxi Province, China
  • Received:2019-02-19 Online:2019-06-28 Published:2019-06-28
  • Contact: Fu Songtao, Professor, School of Basic Sciences, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China; Shanxi Binda Stem Cell Technology Co., Ltd., Taiyuan 030001, Shanxi Province, China; Shanxi Provincial Biomedical Health Graduate Education Innovation Center, Taiyuan 030001, Shanxi Province, China
  • About author:Li Jingjing, Master candidate, School of Basic Sciences, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China

摘要:

文章快速阅读:

 

文题释义:
软骨组织工程:是将体外扩增的种子细胞,植入有良好生物相容性且能够在体内逐渐降解吸收的各种支架材料中,并加入能够诱导细胞增殖定向分化的生长因子,使之再生出具有生物功能的软骨组织,最终将此复合软骨材料植入到损伤部位,以达到修复软骨缺损的目的。
温敏性水凝胶:水凝胶是采用天然或人工合成高分子物质,通过物理或化学交联形成的一种可在水中溶胀并保持大量水分的聚合物高分子材料。温敏性水凝胶结构中具有一定比例的亲水和疏水基团,温度变化可影响这些基团的疏水作用和大分子链间的氢键作用,改变水凝胶的网络结构,产生体积相变,其具有高含水量,同时具有与天然细胞外基质相似的三维空间结构,能够传递各种力学和生物信号。
 
 
背景:由于软骨组织无血管结构,无神经组织,缺乏自我修复与再生的内在能力,因此临床上软骨损伤的修复仍然是一个重大挑战。
目的:旨在制备一种温敏性可注射生物活性水凝胶,用于软骨组织工程。
方法:将0.4%琼脂糖、10%明胶和10 g/L透明质酸溶液混合,制备琼脂糖/明胶/透明质酸水凝胶,然后向其内分别加入0,10,20,30 g/L的软骨细胞外基质,制备4种温敏性可注射生物活性水凝胶,进行扫描电镜、透射电镜、平衡溶胀率、生物力学强度和体外降解率检测。将含20 g/L软骨细胞外基质的温敏性可注射生物活性水凝胶与软骨细胞-骨髓间充质干细胞共培养,培养1,3,7 d,通过活/死细胞荧光双染法评价该水凝胶的细胞相容性。
结果与结论:①扫描电镜显示,4种水凝胶均具有良好的三维网格结构,孔径较大;透射电镜显示,细胞外基质颗粒均匀分布于水凝胶中,颗粒粒径主要在50-200 nm;②随着加入细胞外基质颗粒质量浓度的增加,水凝胶的平衡溶胀率降低;③浸泡于PBS溶液4周时,含0,10,20,30 g/L细胞外基质水凝胶的体外降解率分别为42.32%,67.36%,89.05%和99.47%;④当添加细胞外基质颗粒质量浓度在0-20 g/L时,水凝胶的生物力学强度逐渐增加;⑤培养7 d内,软骨细胞-骨髓间充质干细胞在水凝胶内均匀地分布与生长,并不断增殖,细胞存活率均在90%以上;⑥结果表明细胞外基质颗粒修饰的琼脂糖/明胶/透明质酸水凝胶,是一种可用于软骨组织工程的良好医用生物材料。

关键词: 可注射水凝胶, 温敏性, 明胶, 透明质酸, 琼脂糖, 细胞外基质, 软骨细胞外基质颗粒, 软骨组织工程, 软骨修复

Abstract:

BACKGROUND: Due to no vascular structure or nerve tissue, cartilage tissue lacks the intrinsic ability of self-repair and regeneration. Therefore, the repair of cartilage defect in clinic remains a challenge.
OBJECTIVE: To prepare a thermo-sensitive injectable bioactive hydrogel used for cartilage tissue engineering.
METHODS: Agarose/gelatin/hyaluronic acid hydrogel was prepared by mixing 0.4% agarose, 10% gelatin and 10 g/L hyaluronic acid solution. Then 0, 10, 20, and 30 g/L cartilage extracellular matrix particles were added into the hydrogel respectively to prepare four kinds of thermo-sensitive injectable bioactive hydrogels, for further scanning electron microscope, transmission electron microscope, equilibrium swelling ratio, biomechanical strength and degradation rate. The thermo-sensitive injectable bioactive hydrogel containing 20 g/L cartilage extracellular matrix was co-cultured with chondrocyte-bone marrow mesenchymal stem cells for 1, 3, and 7 days, and the cytocompatibility was assessed by live/dead fluorescence double staining.
RESULTS AND CONCLUSION: (1) Scanning electron microscope showed that all four hydrogels had good three-dimensional grid structure and large pore size. Transmission electron microscope showed that extracellular matrix particles were evenly distributed in the hydrogels, and the particle size was mainly in the range of 50-200 nm. (2) With the extracellular matrix particle concentration increasing, the equilibrium swelling rate of the hydrogel was decreased. (3) The degradation rate in vitro in the four groups of hydrogels containing 0, 10, 20, and 30 g/L extracellular matrix particles immersed in PBS for 4 weeks was 42.32%, 67.36%, 89.05% and 99.47%, respectively. (4) When the concentration of extracellular matrix particles was added at 0-20 g/L, the biomechanical strength of the hydrogel was gradually increased. (5) Within 7 days after culture, chondrocytes-bone marrow mesenchymal stem cells were uniformly distributed and grew in the hydrogel and proliferated continuously, with the cell survival rate of above 90%. (6) These results showed that the agarose/gelatin/hyaluronic acid hydrogel modified with extracellular matrix particles is a good medical biomaterial that can be used for cartilage tissue engineering.

Key words: injectable hydrogel, thermo-sensitivity, gelatin, hyaluronic acid;, agarose, extracellular matrix, cartilage extracellular matrix particles, cartilage tissue engineering, cartilage repair

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