中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (25): 4032-4037.doi: 10.3969/j.issn.2095-4344.2014.25.017

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

Ⅰ型胶原修饰纯钛片促进人脂肪间充质干细胞增殖

叶  川1,马敏先2,张  弢3,汤  晋1,孙  博1,杨  龙1,任厚相1,孙  琦1,杨  静2,张俊标2   

  1. 贵阳医学院附属医院,1骨科,2口腔修复科,贵州省贵阳市  550004;3解放军第117医院骨科,浙江省杭州市  310013
  • 收稿日期:2014-05-14 出版日期:2014-06-18 发布日期:2014-06-18
  • 作者简介:叶川,男,1975年生,四川省成都市人,汉族,2008年中南大学湘雅医学院毕业,博士,副教授,主要从事骨关节外科工作。
  • 基金资助:

    国家自然科学基金资助项目(81360232);贵州省国际科技合作项目(黔科合外G字2010-7);贵州省科技厅社发联合基金项目(黔科合20103166);贵州省科学技术基金(黔科合J字20102177);贵州省科技厅资助项目(LG2012008)

Type I collagen modified titanium sheet improves the proliferation of human adipose-derived mesenchymal stem cells

Ye Chuan1, Ma Min-xian2, Zhang Tao3, Tang Jin1, Sun Bo1, Yang Long1, Ren Hou-xiang1, Sun Qi1, Yang Jing2, Zhang Jun-biao2   

  1. 1Department of Orthopedics, Affiliated Hospital of Guiyang Medical College, Guiyang 550004, Guizhou Province, China; 2Department of Stomatology, Affiliated Hospital of Guiyang Medical College, Guiyang 550004, Guizhou Province, China; 3Department of Orthopedics, the 117 Hospital of PLA, Hangzhou 310013, Zhejiang Province, China
  • Received:2014-05-14 Online:2014-06-18 Published:2014-06-18
  • About author:Ye Chuan, M.D., Associate professor, Department of Orthopedics, Affiliated Hospital of Guiyang Medical College, Guiyang 550004, Guizhou Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81360232; International Science and Technology Cooperation Project of Guizhou Province, No. 2010-7; the Joint Social Development Foundation of Science and Technology Bureau of Guizhou Province, No. 20103166; Science and Technology Foundation of Guizhou Province, No. 20102177; the Project of Guizhou Provincial Science and Technology Bureau, No. LG2012008

摘要:

背景:钛及钛合金在人工关节、骨折固定、口腔种植等临床领域应用最多,但在这些领域都存在骨量不足的复杂病例,干细胞研究的深入为骨缺损提供了促进新骨生成的解决方案,钛和干细胞的生物相容性以及钛表面改性优化等问题已引起重视。
目的:观察Ⅰ型胶原修饰纯钛片后能否改善其与人脂肪间充质干细胞的生物相容性。
方法:实验分为2组,修饰组用Ⅰ型胶原修饰纯钛片,未修饰组为未用Ⅰ型胶原修饰的纯钛片,分别将第6代人脂肪间充质干细胞种植于两组钛片上。分别计算细胞种植于两组钛片上1,2,4 h贴壁细胞的数量,比较两组细胞的黏附率。MTT比色法比较细胞种植于两组钛片上2,4,6,8 d细胞在钛片上的增殖情况。比较细胞种植于两组钛片上3,6,9 d细胞的DNA和蛋白含量。将人脂肪间充质干细胞分别接种于修饰组和未修饰组钛片,细胞种植于两组钛片上6 d时,电镜扫描观察细胞在两组钛片上的生长情况。
结果与结论:修饰组的细胞黏附率在培养1,2 h时高于未修饰组(P < 0.05)。MTT比色法显示,修饰组和未修饰组细胞的吸光度值均随培养时间延长而增高,培养第4,6,8天修饰组吸光度值较未修饰组明显升高    (P < 0.05)。培养第6,9天,修饰组的DNA和蛋白含量均高于未修饰组(P < 0.05)。电镜扫描观察显示,培养第6天,修饰组在细胞贴壁数量、贴壁细胞基质分泌情况明显好于未修饰组。结果证实,Ⅰ型胶原修饰纯钛片的表面活性及生物相容性较好,可促进人脂肪间充质干细胞增殖。


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


全文链接:

关键词: 生物材料, 材料相容性, Ⅰ型胶原/钛, 生物相容性, 生物材料, 人脂肪间充质干细胞, 生物相容性, 细胞贴壁率, 流式, 细胞增殖, 体外, DNA含量, 蛋白含量, 国家自然科学基金

Abstract:

BACKGROUND: Titanium and titanium alloy are used mostly in artificial joints, fracture fixation, and oral transplantation, while there are complex cases of insufficient bone mass in these areas. The deepened research of stem cells offers a solution for bone injury to promote new bone formation. The biocompatibility of titanium and stem cells and optimization of titanium surface modification have aroused people's attention.
OBJECTIVE: To investigate whether the biocompatibility of titanium and human adipose-derived mesenchymal stem cells can be improved by type I collagen modification of titanium sheets.
METHODS: The experiment was divided into two groups. Modification group: titanium sheet was modified with type I collagen; control group: titanium sheet was not modified with type I collagen. Human adipose-derived mesenchymal stem cells at passage 6 were implanted into titanium sheet in two groups. Then we calculated the number of adherent cells in two groups at 1, 2 and 4 hours after implantation, and compared the cell adhesion rate. MTT assay was used to observe the proliferation of cells on titanium sheet at 2, 4, 6 and 8 days after implantation. DNA and protein content of cells were detected at 3, 6, 9 days after implantation. The growth of human adipose-derived mesenchymal stem cells seeded upon the titanium sheets was observed under scanning electron microscope at 6 days.
RESULTS AND CONCLUSION: When the cells were cultured for 1 hour and 2 hours, the number of adherent cells in the modification group was higher than in the control group (P < 0.05). The absorbance of cells in two groups was increased as the culture time, as detected by MTT assay. The modification group had a significantly higher absorbance value than the control group at 4, 6, 8 days (P < 0.05). DNA and protein contents of the cells in the modification group were higher than that in control group at 6 and 9 days (P < 0.05). At 6 days, the number of adherent cells and secretion of adherent stromal cell matrix in the modification group were significantly better than that in control group, observed by scanning electron microscopy. Type I collagen modified titanium sheets have good surface activity and biocompatibility, and can promote the proliferation of human adipose-derived mesenchymal stem cells.


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


全文链接:

Key words: titanium, collagen, mesenchymal stem cells, biocompatible materials

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