中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (28): 4473-4479.doi: 10.12307/2021.060

• 组织工程软骨材料Tissue-engineered cartilage • 上一篇    下一篇

电喷雾法制备海藻酸盐-明胶-脂肪干细胞微球及其修复关节软骨损伤的可行性

廖思达1,2,孟昊业2,李俊康2,徐亦驰2,李  获2,田萧羽1,冯  勇2,汪爱媛2,彭  江2   

  1. 1中国人民解放军医学院,北京市   100853;2中国解放军总医院第一医学中心骨科研究所,骨科再生医学北京市重点实验室,全军骨科战创伤重点实验室,北京市   100853
  • 收稿日期:2020-07-15 修回日期:2020-07-17 接受日期:2020-08-22 出版日期:2021-10-08 发布日期:2021-05-19
  • 通讯作者: 彭江,研究员,中国人民解放军总医院第一医学中心骨科研究所,骨科再生医学北京市重点实验室,全军骨科战创伤重点实验室,北京市 100853
  • 作者简介:廖思达,男,1995年生,辽宁省沈阳市人,汉族,中国人民解放军医学院在读硕士,主要从事软骨等组织工程相关方向的研究。
  • 基金资助:
    国家自然科学基金(81972047),项目负责人:彭江;国家重点研发计划(2016YFC1102104),项目参与者:彭江

Preparation of alginate-gelatin-adipose-derived stem cells microspheres by electrospray and feasibility on repairing articular cartilage injury

Liao Sida1,2, Meng Haoye2, Li Junkang2, Xu Yichi2, Li Huo2, Tian Xiaoyu1, Feng Yong2, Wang Aiyuan2, Peng Jiang2   

  1. 1Medical School of Chinese PLA, Beijing 100853, China; 2Institute Orthopedics, The First Medical Center of the PLA General Hospital, Beijing Key Laboratory of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries, PLA, Beijing 100853, China
  • Received:2020-07-15 Revised:2020-07-17 Accepted:2020-08-22 Online:2021-10-08 Published:2021-05-19
  • Contact: Peng Jiang, Researcher, Institute Orthopedics, The First Medical Center of the PLA General Hospital, Beijing Key Laboratory of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries, PLA, Beijing 100853, China
  • About author:Liao Sida, Master candidate, Medical School of Chinese PLA, Beijing 100853, China; Institute Orthopedics, The First Medical Center of the PLA General Hospital, Beijing Key Laboratory of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries, PLA, Beijing 100853, China
  • Supported by:
    the National natural science foundation of china, no. 81972047 (to pj); the national key research and development program, no. 2016YFC1102104 (to PJ)

摘要:

文题释义:
脂肪源性干细胞:来源于脂肪组织的一类间充质干细胞,具有多向分化能力,部分文献简称为脂肪干细胞,在骨、软骨、神经再生等诸多领域中被广泛应用。脂肪源性干细胞增殖能力强,传代培养简单,因其具有极大的临床转化潜力,所以成为了近年来组织工程领域的研究热点。
海藻酸盐微球:是一种天然的生物材料,已被证实具有一定的组织修复能力。海藻酸盐微球的制备方法有电喷雾法、乳化法等,主要原理是海藻酸钠溶液与钙离子交联形成水凝胶。海藻酸盐微球作为微载体也可附载细胞到达缺损部位,促进组织再生。
背景:微球可作为细胞递送系统,通过注射或者与其他支架相结合的方式使细胞定位于软骨损伤处使其再生。
目的:采用电喷雾法将脂肪源性干细胞负载至海藻酸盐-明胶微球中,评估微球中的细胞活性、增殖和成软骨分化能力。
方法:使用电喷雾技术制备含不同质量浓度明胶(0,5,15,25 g/L)的海藻酸盐微球,光学显微镜下观察微球的外观,选择形成完整微球的明胶质量浓度用于以下实验。使用电喷雾技术制备含脂肪源性干细胞的海藻酸盐微球与海藻酸盐微球-明胶微球,光学显微镜下观察成球效果。将含细胞的两种微球培养于旋转细胞培养系统内,在设定的时间点检测微球内细胞的增殖能力、活性与成软骨能力。
结果与结论:①加入0,5 g/L的明胶可制备出完整的微球,微球直径分别为(365.85±16.88),(358.85±23.97) μm,两种微球直径比较差异无显著性意义(P﹥0.05),后续实验选择明胶质量浓度为5 g/L;②加入脂肪源性干细胞不影响藻酸盐微球与海藻酸盐微球-明胶微球的成球性与微球直径;③含细胞海藻酸盐微球-明胶微球培养7,14 d的细胞增殖数量、活细胞比例均高于含细胞海藻酸盐微球(P < 0.05);④成软骨诱导培养后,含细胞海藻酸盐微球-明胶微球诱导7,14,21 d的糖胺多糖含量高于含细胞海藻酸盐微球(P < 0.05);⑤结果表明,海藻酸盐-明胶微球更易促进脂肪源性干细胞的增殖并保持细胞活性,是软骨组织工程领域中一种具有巨大潜力的生物材料。
https://orcid.org/0000-0002-1489-3730(廖思达)

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

关键词: 骨, 材料, 海藻酸盐, 明胶, 软骨组织工程, 生物材料, 电喷雾, 微载体

Abstract: BACKGROUND: Microsphere can be used as a cell delivery system to localize cells in cartilage injury site and regenerate them by injection or combined with other scaffolds.
OBJECTIVE: To produce adipose-derived stem cells (ADSCs)-embedded alginate-gelatin microspheres for cartilage tissue engineering by electrospray, and to evaluate cell viability, proliferation and chondrogenic differentiation ability of microspheres. 
METHODS: The electrospray technology was used to produce alginate-gelatin microspheres with different gelatin concentrations (0, 5, 15, 25 g/L). The morphology of microspheres could be observed under the optical microscope. The mass concentration of gelatin to form complete microspheres was selected for the following experiments. Alginate-gelatin-ADSCs microspheres and alginate-ADSCs microspheres were produced by electrospray. The spherical effect was observed under the optical microscope. Two kinds of microspheres containing cells were cultured in rotating cell culture system. The proliferation ability, viability and chondrogenic ability of the cells in the microspheres were detected at the set time point.
RESULTS AND CONCLUSION: (1) Intact microspheres could be produced by adding 0, 5 g/L gelatin. The diameter of the microspheres was (365.85±16.88) or (358.85±23.97) μm. There was no significant difference in the diameter of the two kinds of microspheres (P > 0.05). The mass concentration of gelatin as 5 g/L was selected for subsequent experiments. (2) The addition of ADSCs did not affect the spheroidization and the diameter of alginate microspheres and alginate microspheres-gelatin microspheres. (3) The number of cell proliferation and the proportion of living cells at 7 and 14 days were higher in the alginate-gelatin-ADSCs microspheres than those without alginate-ADSCs microspheres (P < 0.05). (4) The content of glycosaminoglycan was higher in alginate-gelatin-ADSCs microspheres than that in alginate-ADSCs microspheres at 7, 14, and 21 days after chondrogenic differentiation (P < 0.05). (5) It is concluded that alginate-gelatin-ADSCs microspheres are prone to promote proliferation and keep cell viability, and are a kind of biomaterials with great potential in the field of cartilage tissue engineering.

Key words: bone, materials, alginate, gelatin, cartilage tissue engineering, biomaterials, electrospray, microcarrier

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