中国组织工程研究 ›› 2025, Vol. 29 ›› Issue (23): 4851-4858.doi: 10.12307/2025.501

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

重组慢病毒转染兔骨髓间充质干细胞与脱钙骨基质构建转基因组织工程材料

宁寅宽1,刘林志1,周次腊2,隆宇斌3   

  1. 邵阳市中心医院,1血管外科,2内分泌科,3脊柱外科,湖南省邵阳市   422000
  • 收稿日期:2024-04-02 接受日期:2024-06-24 出版日期:2025-08-18 发布日期:2024-09-25
  • 通讯作者: 隆宇斌,硕士,邵阳市中心医院脊柱外科,湖南省邵阳市 422000
  • 作者简介:宁寅宽,男,1986年生,2015年桂林医学院毕业,硕士,主治医师,主要从事血管与骨组织工程、生物矿化、基因治疗研究。
  • 基金资助:
    广西壮族自治区自然科学基金项目 (2014GXNSFAA118263),项目参与人:宁寅宽;邵阳市科技计划项目(2022NS4150),项目负责人:宁寅宽

Rabbit bone marrow mesenchymal stem cells transfected with recombinant lentivirus and decalcified bone matrix to construct transgenic tissue engineering materials

Ning Yinkuan1, Liu Linzhi1, Zhou Cila2, Long Yubin3   

  1. 1Department of Vascular Surgery, 2Department of Endocrinology, 3Department of Spinal Surgery, Shaoyang Central Hospital, Shaoyang 422000, Hunan Province, China
  • Received:2024-04-02 Accepted:2024-06-24 Online:2025-08-18 Published:2024-09-25
  • Contact: Long Yubin, Master, Department of Spinal Surgery, Shaoyang Central Hospital, Shaoyang 422000, Hunan Province, China
  • About author:Ning Yinkuan, Master, Attending physician, Department of Vascular Surgery, Shaoyang Central Hospital, Shaoyang 422000, Hunan Province, China
  • Supported by:
    Natural Science Foundation of Guangxi Zhuang Autonomous Region, No. 2014GXNSFAA118263 (to NYK); Shaoyang Science and Technology Plan Project, No. 2022NS4150 (to NYK)

摘要:

文题释义:

增强型绿色荧光蛋白:是一种荧光标记工具,将增强型绿色荧光蛋白与目的基因融合后通过基因载体转染细胞,用于监测目的基因的位置和表达情况。
转基因组织工程材料:种子细胞、细胞因子和支架材料是组织工程的三要素。骨髓间充质干细胞的获取、扩增相对容易,又避免了胚胎干细胞的伦理学问题,是比较理想的种子细胞。经处理的松质脱钙骨支架含有天然的骨形态发生蛋白细胞因子。增强型绿色荧光蛋白重组慢病毒转染骨髓间充质干细胞与脱钙骨支架复合培养可以体外构建转基因组织工程材料。

摘要
背景:缺损组织的修复重建受限于自体或异体可替代移植材料的来源问题而导致临床应用受限,转基因干细胞和组织工程材料研究开辟了新的治疗思路。
目的:探究增强型绿色荧光蛋白重组慢病毒转染兔骨髓间充质干细胞在体外的生物学特性以及与脱钙骨基质体外构建转基因组织工程材料的生物矿化特性。
方法:细胞贴壁及密度离心法获得兔骨髓间充质干细胞,增强型绿色荧光蛋白重组慢病毒以感染复数为100转染第5代兔骨髓间充质干细胞,体外观察转染细胞与未转染细胞的增殖能力、细胞表型、细胞周期以及成骨诱导后碱性磷酸酶、Runx2、骨钙素表达的差异;增强型绿色荧光蛋白重组慢病毒转染骨髓间充质干细胞与脱钙骨基质在体外构建转基因组织工程材料,对其进行扫描电镜观察及元素能谱分析。

结果与结论:增强型绿色荧光蛋白重组慢病毒成功转染骨髓间充质干细胞后,在转染24,48 h细胞增殖较未转染细胞缓慢 (P < 0.05);在转染72 h后,细胞表型未发生变异,细胞周期、细胞增殖能力以及成骨诱导后碱性磷酸酶、Runx2、骨钙素表达量与未转染细胞无明显差异(P > 0.05);增强型绿色荧光蛋白标记的骨髓间充质干细胞在脱钙骨基质支架上有较好的生物相容性,根据荧光表达强度推测目的基因在2周左右发挥最大生物学功能,且出现了钙磷矿化物沉积,体现出优越的生物矿化特性。

https://orcid.org/0000-0003-4771-6930 (宁寅宽);https://orcid.org/0009-0000-9380-5577 (隆宇斌)



关键词: 重组慢病毒载体, 增强绿色荧光蛋白, 骨髓间充质干细胞, 基因治疗, 生物学特性

Abstract: BACKGROUND: The use of autologous or allogeneic transplantation materials for tissue repair and reconstruction is limited and carries limitations in clinical applications. Transgenic stem cells and tissue engineering materials offer new therapeutic possibilities.
OBJECTIVE: To investigate the in vitro biological characteristics of enhanced green fluorescent protein recombinant lentivirus transfected into rabbit bone marrow mesenchymal stem cells and the biommineralization characteristics of transgenic tissue engineering materials constructed using decalcified bone matrix. 
METHODS: Rabbit bone marrow mesenchymal stem cells were obtained through adherent culture and density gradient centrifugation. The fifth-generation bone marrow mesenchymal stem cells were transfected with enhanced green fluorescent protein recombinant lentivirus at the optimal multiplicity of infection (MOI=100). The differences in cell proliferation capacity, cell phenotype, cell cycle, alkaline phosphatase expression, osteogenic transcription factor (Runx2) expression, and osteocalcin gene expression after osteogenesis were observed between the transfected cells and non-transfected cells in vitro. The micromorphology and elemental energy spectrum analysis of the transgenic tissue engineering materials constructed from cells and decalcified bone matrix scaffold were also observed. 
RESULTS AND CONCLUSION: Bone marrow mesenchymal stem cells transfected with enhanced green fluorescent protein recombinant lentivirus showed that cell proliferation at 24 and 48 hours after transfection was slower than that of untransfected cells (P < 0.05). After 72 hours, the cell phenotype remained unchanged, and the expressions of alkaline phosphatase, Runx2, and osteocalcin after osteogenic induction were not significantly different from those of untransfected bone marrow mesenchymal stem cells (P > 0.05). The transgenic tissue engineering materials constructed in vitro using enhanced green fluorescent protein recombinant lentivirus transfected bone marrow mesenchymal stem cells and decalcified bone matrix showed good biocompatibility on the decalcified bone matrix scaffold. Based on fluorescence expression intensity, it was estimated that the target gene would exert its maximum biological function in about 2 weeks, and calcium phosphate deposits would continue to appear, demonstrating superior biomineralization characteristics. 

Key words: recombinant lentiviral vector, enhanced green fluorescent protein, bone marrow mesenchymal stem cell, gene therapy, biological characteristics

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