中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (6): 878-882.doi: 10.12307/2023.249

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

酪蛋白激酶2相互作用蛋白1调控骨质疏松大鼠骨髓间充质干细胞的成骨能力

龙燕鸣1,谢梦生2,3,黄加洁2,3,薛文利2,3,荣  慧2,3,李晓捷2,3   

  1. 1广西壮族自治区人民医院口腔科,广西壮族自治区南宁市   530021;2广西医科大学口腔医学院,广西壮族自治区南宁市   530021;3广西口腔颌面修复与重建研究自治区级重点实验室,广西壮族自治区南宁市   530021
  • 收稿日期:2022-01-04 接受日期:2022-04-18 出版日期:2023-02-28 发布日期:2022-08-09
  • 通讯作者: 李晓捷,主任医师,硕士生导师,广西医科大学口腔医学院,广西壮族自治区南宁市 530021;广西口腔颌面修复与重建研究自治区级重点实验室,广西壮族自治区南宁市 530021
  • 作者简介:龙燕鸣,女,1991年生,汉族,2019年广西医科大学毕业,硕士,主要从事口腔修复方面的研究。
  • 基金资助:
    广西自然科学基金(2019GXNSFAA245085),项目负责人:李晓捷

Casein kinase 2-interaction protein-1 regulates the osteogenic ability of bone marrow mesenchymal stem cells in osteoporosis rats

Long Yanming1, Xie Mengsheng2, 3, Huang Jiajie2, 3, Xue Wenli2, 3, Rong Hui2, 3, Li Xiaojie2, 3   

  1. 1Department of Stomatology, People’s Hospital of Guangxi Zhuang Autonomous Region, Nanning 530021, Guangxi Zhuang Autonomous Region, China; 2College of Stomatology, Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China; 3Guangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and Reconstruction, Nanning 530021, Guangxi Zhuang Autonomous Region, China
  • Received:2022-01-04 Accepted:2022-04-18 Online:2023-02-28 Published:2022-08-09
  • Contact: Li Xiaojie, Chief physician, Master’s supervisor, College of Stomatology, Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China; Guangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and Reconstruction, Nanning 530021, Guangxi Zhuang Autonomous Region, China
  • About author:Long Yanming, Master, Department of Stomatology, People’s Hospital of Guangxi Zhuang Autonomous Region, Nanning 530021, Guangxi Zhuang Autonomous Region, China
  • Supported by:
    the Natural Science Foundation of Guangxi Zhuang Autonomous Region, No. 2019GXNSFAA245085 (to LXJ)

摘要:

文题释义:
CKIP-1:酪蛋白激酶2相互作用蛋白1(casein kinase 2-interaction protein-1,CKIP-1)基因参与了多种蛋白质-蛋白质的相互作用,是骨形成的负调控因子。
靶向基因干扰技术:是一种同源mRNA高效特异性降解现象,其可以特异性调控蛋白表达,从而达到靶向治疗目的的转录后基因沉默技术。

背景:目前对酪蛋白激酶2相互作用蛋白1(casein kinase 2-interaction protein-1,CKIP-1)分子机制的体外研究主要集中在基因敲除小鼠来源成骨细胞或骨髓间充质干细胞,鲜见报道骨质疏松模型大鼠来源骨髓间充质干细胞中CKIP-1表达的研究。
目的:探讨下调CKIP-1基因前后骨质疏松状态骨髓间充质干细胞成骨分化能力的变化。
方法:用维甲酸诱导雌性SD大鼠骨质疏松模型,采用全骨髓贴壁法体外培养骨质疏松组、正常组大鼠骨髓间充质干细胞。成骨诱导后进行茜素红染色、碱性磷酸酶染色及实时定量RT-PCR检测骨桥蛋白、Runx2 mRNA的相对表达,实时定量RT-PCR检测成骨诱导过程中2组细胞中CKIP-1的动态表达;通过基因转染沉默CKIP-1基因,成骨诱导后进行茜素红染色、碱性磷酸酶染色及实时定量RT-PCR检测骨桥蛋白、Runx2 mRNA的相对表达。
结果与结论:①与正常组相比,骨质疏松组骨髓间充质干细胞茜素红染色钙结节定量、碱性磷酸酶活性及骨桥蛋白、Runx2的mRNA水平降低(P < 0.05),骨质疏松组骨髓间充质干细胞中CKIP-1基因动态表达水平总体偏高;②与未下调CKIP-1的骨质疏松组骨髓间充质干细胞相比,下调CKIP-1基因表达后,骨质疏松组骨髓间充质干细胞茜素红染色钙结节定量、碱性磷酸酶活性及骨桥蛋白、Runx2的mRNA水平明显升高(P < 0.05);③结果表明,维甲酸诱导的骨质疏松大鼠骨髓间充质干细胞成骨能力降低,下调CKIP-1基因可以部分提高其成骨分化能力。

https://orcid.org/0000-0002-9064-0882 (李晓捷)

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: 大鼠, 维甲酸, CKIP-1, 骨质疏松, 骨髓间充质干细胞, 成骨分化

Abstract: BACKGROUND: At present, in vitro studies on the molecular mechanism of casein kinase 2-interaction protein-1 (CKIP-1) mainly focus on gene knockout mouse-derived osteoblasts or bone marrow mesenchymal stem cells. There are few reports focusing on the expression of CKIP-1 in bone marrow mesenchymal stem cells derived from osteoporosis model rats.
OBJECTIVE: To investigate the changes in osteogenic differentiation of bone marrow mesenchymal stem cells before and after down-regulation of CKIP-1 gene.
METHODS:  An osteoporotic rat model was induced by retinoic acid gavage. The bone marrow mesenchymal stem cells of the osteoporosis group and the normal group were cultured in vitro by the whole bone marrow adherence method. After osteogenic induction, Alizarin red staining, alkaline phosphatase staining and real-time quantitative RT-PCR were utilized to detect the relative expression of osteopontin and Runx2 mRNA. The dynamic expression of CKIP-1 in the two groups of cells was detected by using real-time quantitative RT-PCR. CKIP-1 gene was silenced by gene transfection. After osteogenic induction, alizarin red staining, alkaline phosphatase staining, and real-time quantitative RT-PCR were performed to detect the relative expression of osteopontin and Runx2 mRNA. 
RESULTS AND CONCLUSION: (1) Compared with the normal group, alizarin red staining of calcium nodules, alkaline phosphatase activity and mRNA levels of osteopontin and Runx2 in bone marrow mesenchymal stem cells decreased in the osteoporosis group (P < 0.05). The dynamic expression level of CKIP-1 gene in bone marrow mesenchymal stem cells was generally higher in the osteoporosis group. (2) Compared with bone marrow mesenchymal stem cells of osteoporosis group without down-regulation of CKIP-1, after down-regulation of CKIP-1 gene expression, the quantification of calcium nodules and alkaline phosphatase activity by alizarin red staining, mRNA levels of osteopontin and Runx2 were significantly increased in bone marrow mesenchymal stem cells of the osteoporosis group (P < 0.05). (3) Therefore, osteogenic ability of bone marrow mesenchymal stem cells in rats with retinoic acid-induced osteoporosis is reduced and down-regulation of CKIP-1 gene can partially improve their osteogenic differentiation ability.

Key words: rat, retinoic acid, CKIP-1, osteoporosis, bone marrow mesenchymal stem cell, osteogenic differentiation

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