中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (10): 1528-1533.doi: 10.12307/2023.247

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

慢病毒下调酪蛋白激酶2相互作用蛋白1表达的骨髓间充质干细胞修复骨质疏松大鼠牙槽骨缺损

谢梦生1,2,龙燕鸣1,2,李晓捷1,2   

  1. 1广西医科大学口腔医学院,广西壮族自治区南宁市   530021;2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:2023-04-08 发布日期:2022-09-07
  • 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:谢梦生,男,1992年生,四川省成都市人,汉族,2019年广西医科大学毕业,硕士,医师,主要从事口腔修复方面研究。
  • 基金资助:
    广西自然科学基金面上项目(2019GXNSFAA245085),项目负责人:李晓捷

Lentiviral down-regulation of casein kinase 2-interacting protein-1 expression in bone marrow mesenchymal stem cells to repair alveolar bone defects in osteoporosis rats

Xie Mengsheng1, 2, Long Yanming1, 2, Li Xiaojie1, 2   

  1. 1College of Stomatology, Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China; 2Guangxi 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:2023-04-08 Published:2022-09-07
  • 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:Xie Mengsheng, Master, Physician, 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
  • Supported by:
    General Project of Guangxi Natural Science Foundation, No. 2019GXNSFAA245085 (to LXJ)

摘要:

文题释义:
骨质疏松症:是一类全身系统性的骨病,由多种原因引起,以全身骨组织量下降、骨结构破坏为特点。
酪蛋白激酶2相互作用蛋白1(casein kinase 2-interacting protein-1,CKIP-1):CKIP-1 cDNA编码全长409个氨基酸,分子质量约为46 kD。CKIP-1在细胞分化、凋亡、癌变及转录等细胞行为中,通过与其他蛋白的相互作用发挥重要作用,近来发现CKIP-1与骨形成呈负相关关系。

背景:在口腔牙槽骨修复治疗过程中,患者的全身状况尤其是骨质疏松症等系统性疾病往往会影响治疗效果,近来发现酪蛋白激酶2相互作用蛋白1(casein kinase 2-interacting protein-1,CKIP-1)具有负调控成骨的作用,因此有希望作为新的靶点用于治疗骨质疏松。
目的:探究CKIP-1表达下调的骨髓间充质干细胞对骨质疏松大鼠牙槽骨缺损的修复作用。
方法:①从1周龄SD乳鼠股骨及胫骨骨髓中分离培养出骨髓间充质干细胞,慢病毒转染降低骨髓间充质干细胞中的CKIP-1水平;②通过维甲酸[70 mg/(kg•d)]灌胃21 d的方式建立骨质疏松SD大鼠模型,将CKIP-1表达下调的骨髓间充质干细胞与明胶海绵复合体、空载体转染的骨髓间充质干细胞与明胶海绵复合体、明胶海绵分别植入骨质疏松大鼠模型牙槽骨缺损内,正常组将明胶海绵植入正常大鼠牙槽骨缺损内。术后正常喂养30 d后,取上颌牙槽骨进行苏木精-伊红染色并通过Lane-Sandhu组织学评分和新生骨百分比评估骨缺损愈合情况,通过qRT-PCR技术和免疫组化染色检测各组术区牙槽骨中CKIP-1、碱性磷酸酶、骨钙素的mRNA相对表达量及阳性表达情况。
结果与结论:①与空载体转染相比,CKIP-1下调后的骨髓间充质干细胞中CKIP-1的mRNA相对表达量减少(P < 0.05);②与植入空载体转染的骨髓间充质干细胞与明胶海绵复合体组、明胶海绵组相比,植入CKIP-1表达下调的骨髓间充质干细胞与明胶海绵复合体组Lane-Sandhu组织学评分和新生骨百分比显著升高(P < 0.05),与正常组相近;碱性磷酸酶、骨钙素表达显著升高(P < 0.05);③结果说明,局部移植CKIP-1下调的骨髓间充质干细胞对骨质疏松大鼠牙槽骨缺损具有明显的修复作用。

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: 骨质疏松症, CKIP-1, 骨髓间充质干细胞, 组织工程, 慢病毒转染, 骨缺损, 大鼠

Abstract: BACKGROUND: Osteoporosis is a frequently encountered and urgent problem in the clinical repair and treatment of alveolar bone and often affects the treatment effect. Casein kinase 2-interacting protein-1 (CKIP-1) has recently been found to have a negative regulation of osteogenesis, so it is promising as a new target for the treatment of osteoporosis.
OBJECTIVE: To explore the repair effect of bone marrow mesenchymal stem cells modified with CKIP-1 on alveolar bone defects in osteoporosis rats. 
METHODS:  (1) Bone marrow mesenchymal stem cells were isolated and cultured from 1-week-old SD rats. Lentiviral transfection reduced the expression of CKIP-1 in bone marrow mesenchymal stem cells. (2) The model of osteoporosis rats was established by intragastric administration of retinoic acid (70 mg/kg per day) for 21 days. The complex of bone marrow mesenchymal stem cells modified with CKIP-1 and gelatin sponge, the complex of bone marrow mesenchymal stem cells transfected with empty vector and gelatin sponge, and the gelatin sponge were implanted into the alveolar bone defect of the osteoporosis rat model, separately. Gelatin sponge was implanted into bilateral alveolar bone defects of normal rat model of the normal group. After 30 days of normal feeding, the maxillary alveolar bone was taken for sectioning and staining, and the healing of bone defect was calculated by the Lane-Sandhu histological score and the percentage of new bone. The relative mRNA expression and positive expression of CKIP-1, alkaline phosphatase and osteocalcin in the alveolar bone of each group were detected by qRT-PCR and immunohistochemical staining. 
RESULTS AND CONCLUSION: (1) Compared with empty vector transfection, the relative expression of CKIP-1 mRNA in bone marrow mesenchymal stem cells modified with CKIP-1 decreased (P < 0.05). (2) Compared with the bone marrow mesenchymal stem cells transfected with the empty vector and gelatin sponge complex group and the gelatin sponge group, the Lane-Sandhu histological score and the percentage of new bone significantly increased in the bone marrow mesenchymal stem cells modified with CKIP-1 and gelatin sponge complex group (P < 0.05), which were similar to the normal group; the expression levels of alkaline phosphatase and osteocalcin were significantly increased (P < 0.05). (3) The results indicated that local transplantation of CKIP-1 transfected modified bone marrow mesenchymal stem cells had better repair effect on alveolar bone defects in osteoporosis rats.

Key words: osteoporosis, CKIP-1, bone marrow mesenchymal stem cell, tissue engineering, lentiviral transfection, bone defect, rat

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