中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (37): 5916-5922.doi: 10.3969/j.issn.2095-4344.2015.37.003

• 骨组织构建 bone tissue construction • 上一篇    下一篇

骨膜细胞与髓核细胞共培养向成骨方向的分化

杨宇明1,袁 峰2,陆海涛1,张峻伟1,盛晓磊1,李智多1   

  1. 1徐州医学院研究生学院,江苏省徐州市  221000; 2徐州医学院附属医院,江苏省徐州市  221000
  • 出版日期:2015-09-10 发布日期:2015-09-10
  • 通讯作者: 袁峰,博士,主任医师,硕士生导师,徐州医学院附属医院,江苏省徐州市 221000
  • 作者简介:杨宇明,男,1987年生,江苏省徐州市人,汉族,徐州医学院骨科在读硕士,主要从事脊柱外科与骨组织工程的研究。
  • 基金资助:

    江苏省卫生厅课题(H201129)

Osteogenic differentiation of nucleus puplousus cells co-cultured with autologous periosteal cells

Yang Yu-ming1, Yuan Feng2, Lu Hai-tao1, Zhang Jun-wei1, Sheng Xiao-lei1, Li Zhi-duo1   

  1. 1School of Graduate, Xuzhou Medical College, Xuzhou 221000, Jiangsu Province, China; 2Affiliated Hospital of Xuzhou Medical College, Xuzhou 221000, Jiangsu Province, China
  • Online:2015-09-10 Published:2015-09-10
  • Contact: Yuan Feng, M.D., Chief physician, Master’s supervisor, Affiliated Hospital of Xuzhou Medical College, Xuzhou 221000, Jiangsu Province, China
  • About author:Yang Yu-ming, Studying for master’s degree, School of Graduate, Xuzhou Medical College, Xuzhou 221000, Jiangsu Province, China
  • Supported by:

    the Project of Jiangsu Health Department, No. H201129

摘要:

背景:骨膜细胞已被应用于骨缺损及修复,但其可否在成骨诱导环境中与髓核细胞共培养向成骨分化,并应用于椎间隙骨性融合的相关研究报道较少。

目的:分离培养髓核细胞与骨膜细胞,观察特定环境下髓核细胞的成骨潜能,以及加入骨膜细胞与其共培养后的成骨能力。

方法:Ⅱ型胶原酶消化离心贴壁法分离兔髓核细胞;组织贴壁培养法分离兔骨膜细胞。采用细胞表面抗原CD90、CD105免疫荧光染色法鉴定骨膜细胞,甲苯胺蓝染色及Ⅱ型胶原免疫组织化学鉴定髓核细胞。实验分为两组:成骨诱导环境单独培养的髓核细胞为对照组,加入骨膜细胞与髓核细胞共培养为实验组。CCK8法检测细胞增殖,分别行碱性磷酸酶、茜素红染色、Ⅰ型胶原免疫组织化学染色进行成骨鉴定,Western blot检测两组细胞成骨诱导后骨桥蛋白的表达。

结果与结论:骨膜细胞表面抗原CD90、CD105呈阳性,髓核细胞甲苯胺蓝染色及Ⅱ型胶原染色阳性;1,3,5,7,9 d各时间点实验组髓核细胞增殖活性显著高于对照组;诱导2周后2组细胞碱性磷酸酶染色、茜素红染色及Ⅰ型胶原免疫组织化学染色均为阳性,但实验组阳性表达高于对照组(P < 0.05);实验组骨桥蛋白表达强于对照组。髓核细胞具有成骨分化的潜能,但体外的增殖能力较低,加入骨膜细胞后,共培养细胞增殖分化能力提高。成骨诱导下骨膜细胞与髓核细胞共培养具有良好相容性,细胞相互黏附,并具有强于单独诱导髓核细胞的成骨能力。

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程

关键词: 组织构建, 骨细胞, 髓核细胞, 骨膜细胞, 共培养, 成骨分化, 增殖, 分化, 黏附, 骨形态发生蛋白7, 组织工程

Abstract:

BACKGROUND: Periosteal cells have been used in bone repair, but whether nucleus puplousus cells co-cultured with autologous periosteal cells can differentiate into osteoblasts in spinal fusion is rarely reported.

OBJECTIVE: To isolate nucleus puplousus cells and periosteal cells so as to observe the osteogenic ability of nucleus puplousus cells co-cultured with periosteal cells or not.

METHODS: Type II collagenase digestion method was used to isolate and purify nucleus pulposus cells, which were confirmed by toluidine blue and immunohistochemical staining. Periosteal cells were isolated histologically 
and cultured in complete medium, and cell surface antigens CD90, CD105 were identified by immunofluorescence staining. According to the experimental needs, the cells were assigned into two groups. Nucleus pulposus cells and periosteal cells were co-cultured by osteogenic induction medium in the experimental group. Nucleus pulposus cells in the control group were cultured alone in osteogenic induction medium. Cell morphology was observed by inverted microscopy, and cell proliferation was detected by cell counting kit-8. The osteogenic differentiation indexes of cells in each group were measured using alkaline phosphatase staining, alizarin red staining, and type I collagen immunohistoehemical staining. The expression of osteopontin was tested by western blot assay.

RESULTS AND CONCLUSION: CD105 and CD90 expressions of the periosteal cells were positive. Nucleus puplousus cells were positive for toluidine blue and collagen type II immunohistochemical staining. The proliferative ability of nucleus puplousus cells was significantly higher in the experimental group than the control group at days 1, 3, 5, 7, 9. After 2 weeks of induction, the cells were positive for alkaline phosphatase staining, alizarin red staining, and type I collagen immunohistoehemical staining, but the experimental group showed higher positive expressions than the control group (P < 0.05). The expression of osteopontin was also higher in the experimental group than the control group. These findings indicate that nucleus puplousus cells possess osteogenic ability, but have lower proliferative ability in vitro. After co-culture with periosteal cells, the proliferative ability of nucleus puplousus cells can be increased. Under osteogenic induction, nucleus puplousus cells co-cultured with periosteal cells have good compatibility and adhere with each other, which have stronger osteogenic ability than cells cultured alone.

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程

Key words: Periosteum, Osteoblasts, Bone Morphogenetic Protein 7

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