中国组织工程研究 ›› 2020, Vol. 24 ›› Issue (1): 40-44.doi: 10.3969/j.issn.2095-4344.2007

• 骨髓干细胞 bone marrow stem cells • 上一篇    下一篇

补骨脂素诱导兔骨内膜间充质干细胞增殖构建细胞支架复合体修复骨不连

赖丽金1,莫浩轩2   

  1. 1深圳市龙华区人民医院,广东省深圳市  518109;2香港工人联合医疗所,中国香港  810015
  • 收稿日期:2019-03-04 修回日期:2019-03-09 接受日期:2019-04-19 出版日期:2020-01-08 发布日期:2019-12-11
  • 通讯作者: 莫浩轩,医师,香港工人联合医疗所,中国香港 810015
  • 作者简介:赖丽金,女,1989年生,广东省茂名市人,汉族,硕士,医师,主要从事中医全科研究。

Psoralen induces proliferation of rabbit endosteal mesenchymal stem cells and constructs cell-scaffold bone complex in nonunion repair

Lai Lijin1, Mo Haoxuan2   

  1. 1The People’s Hospital of Longhua, Shenzhen 518109, Guangdong Province, China; 2Hong Kong Federation of Trade Unions Workers’ Medical Clinics, Hong Kong Special Administrative Region 810015, China
  • Received:2019-03-04 Revised:2019-03-09 Accepted:2019-04-19 Online:2020-01-08 Published:2019-12-11
  • Contact: Mo Haoxuan, Physician, Hong Kong Federation of Trade Unions Workers’ Medical Clinics, Hong Kong Special Administrative Region 810015, China
  • About author:Lai Lijin, Master, Physician, The People’s Hospital of Longhua, Shenzhen 518109, Guangdong Province, China

摘要:

MTT比色法:是一种检测细胞相对数量的方法,目前被各实验广泛使用。基本原理是活细胞内存在琥珀酸脱氢酶,与MTT可产生生物作用,形成蓝紫色结晶甲瓒。二甲基亚砜溶解结晶甲瓒,通过相互作用后采用酶联免疫检测仪检测吸光度值,间接反映细胞数量。此方法被广泛应用于细胞实验、药物筛查和肿瘤实验中。

补骨脂素:是一种化合物补骨脂的有效成分,来源于豆科植物补骨脂的果实或者伞形科植物珊瑚菜的根茎,为无色针状结晶,熔点189-190 ℃,溶于乙醇、微溶于水和乙醚。补骨脂素具有温肾壮阳、温补脾肾功效,可用于尿频、遗尿、腰膝冷痛、肾虚作喘等,还具有刺激细胞增殖分化的功能。

背景:补骨脂素是属于植物类雌激素,有大量研究证实其具有促进细胞增殖分化的作用。

目的:应用补骨脂素、兔骨内膜间充质干细胞和聚己内酯支架构建人工复合骨,探讨其治疗兔骨不连的效果。

方法:①将第3代兔骨内膜间充质干细胞接种于细胞培养板中,分别加入10-8,10-7,10-6 mol/L补骨脂素、50 mg/L骨形态发生蛋白2进行干预,对照组加入同体积的无菌纯净水。干预第3,5,7天采用MTT法检测细胞增殖情况;②将聚己内酯三维支架加入到细胞培养板底部,兔骨内膜间充质干细胞按1×103/孔的量接种于支架上,然后加入10-6 mol/L补骨脂素,联合培养21 d后取出即为人工复合骨;③27只新西兰大白兔随机均分为3组,建立桡骨骨不连模型,实验组植入人工复合骨,支架组单纯植入支架,对照组不植入任何材料。术后2,4,8周行病理学苏木精-伊红染色,观察成骨情况。术后第4周拍摄X射线片,观察骨不连愈合情况。

结果与结论:①3种浓度补骨脂素均有诱导兔骨内膜间充质干细胞增殖的作用,与对照组比较,10-6 mol/L补骨脂素对兔骨内膜间充质干细胞刺激作用最强(P < 0.05),而且10-6 mol/L补骨脂素组与阳性对照骨形态发生蛋白2组相比差异无显著性意义(P > 0.05);②新西兰大白兔桡骨中段骨不连组织苏木精-伊红染色结果显示,实验组成骨细胞数目明显多于支架组和对照组(P < 0.05);③X射线片结果显示,实验组骨不连已经愈合,支架组骨折部分愈合,对照组骨不连未愈合;④结果表明,补骨脂素对兔骨内膜间充质干细胞增殖作用与浓度有一定的相关性。补骨脂素可结合兔骨内膜间充质干细胞及聚己内酯支架形成人工复合骨,通过动物实验证实其治疗骨不连效果较好。

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

关键词: 补骨脂素, 兔骨内膜间充质干细胞, 细胞增殖, 细胞支架, 骨不连

Abstract:

BACKGROUND: Psoralen is a plant estrogen, and a large number of studies have confirmed its role in promoting cell proliferation and differentiation.

OBJECTIVE: To construct a cell-scaffold composite bone using psoralen, rabbit endosteal mesenchymal stem cells and polycaprolactone and to explore its effect on the treatment of rabbit nonunion.

METHODS: (1) Rabbit endosteal mesenchymal stem cells were cultured and cultured until the third generation for each experiment. Passage 3 cells were seeded onto culture plates containing 50 mg/L bone morphogenetic protein 2 (positive control), 10-8, 10-7 and 10-6 mol/L psoralen (low-, middle-, and high-concentration psoralen groups) or the same volume of purified water (control group). The cell proliferation of each group was detected on the 3rd, 5th and 7th days after intervention using MTT method. (2) The three-dimensional polycaprolactone scaffold was added to the bottom of the cell culture plate, and rabbit endosteal mesenchymal stem cells were seeded into the scaffold at a density of 1×103 per well. Then, 10-6 mol/L of psoralen was added. Cell-scaffold composite bone was taken after 21 days of culture. (3) Animal models of radial nonunion were established in 27 New Zealand white rabbits, and were then randomized into experimental, scaffold and control groups followed by implantation of cell-scaffold composite bone, simple scaffold, and nothing, respectively. Pathological hematoxylin-eosin staining for observation of bone healing was performed at the 2nd, 4th, and 8th weeks after surgery. Healing of nonunion was observed on the X-ray films that were taken at the 4th week after surgery.

RESULTS AND CONCLUSION: (1) Three concentrations of psoralen could induce the proliferation of rabbit endosteal mesenchymal stem cells. Compared with the control group, 10-6 mol/L psoralen exerted the strongest stimulation effect on rabbit endosteal mesenchymal stem cells (P < 0.05), whereas there was no significant difference between high-concentration psoralen group positive control group (P > 0.05). (2) Pathological hematoxylin-eosin staining of radial nonunion showed that the number of osteoblasts in the experimental group was higher than that in the scaffold and control groups (P < 0.05). (3) The X-ray films revealed bone healing in the experimental group, partial healing in the scaffold group and non-healing in the control group. Overall findings indicate that psoralen can promote the proliferation of rabbit endostealmesenchymal stem cells, and the effect is certainly related to the concentration of psoralen. Psoralen can be combined with rabbit endosteal mesenchymal stem cells and polycaprolactone scaffold to form composite bone, achieving good outcomes in the treatment of nonunion in animals.

Key words: psoralen, rabbit endosteal mesenchymal stem cells, cell proliferation, cell scaffold, bone nonunion

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