中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (24): 3792-3797.doi: 10.3969/j.issn.2095-4344.0313

• 口腔组织构建 oral tissue construction • 上一篇    下一篇

OTX2基因对hFOB1.19成骨细胞增殖和分化的影响

王  晶1,2,田玉楼2   

  1. 1中国医科大学临床一系,辽宁省沈阳市  110122;2中国医科大学口腔医学院正畸教研室,辽宁省沈阳市  110002
  • 收稿日期:2018-04-28
  • 通讯作者: 田玉楼,博士,教授,中国医科大学口腔医学院正畸教研室,辽宁省沈阳市 110002
  • 作者简介:王晶,女,1987年生,辽宁省沈阳市人,汉族,中国医科大学毕业,硕士,主要从事口腔正畸学基础研究。
  • 基金资助:

    沈阳市科技计划项目(F15-199-1-55);辽宁省教育厅科学研究项目(LK201639)

Effect of OTX2 gene on the proliferation and differentiation of hFOB1.19 osteoblasts

Wang Jing1, 2, Tian Yu-lou2   

  1. 1the First Clinical Department of China Medical University, Shenyang 110122, Liaoning Province, China; 2Department of Orthodontics, School of Stomatology, China Medical University, Shenyang 110002, Liaoning Province, China
  • Received:2018-04-28
  • Contact: Tian Yu-lou, M.D., Professor, Department of Orthodontics, School of Stomatology, China Medical University, Shenyang 110002, Liaoning Province, China
  • About author:Wang Jing, Master, the First Clinical Department of China Medical University, Shenyang 110122, Liaoning Province, China; Department of Orthodontics, School of Stomatology, China Medical University, Shenyang 110002, Liaoning Province, China
  • Supported by:

    the Science and Technology Program of Shenyang, No. F15-199-1-55; the Science Research Project of Department of Education of Liaoning Province, No. LK201639

摘要:

文章快速阅读:
文题释义:
OTX2 基因:定位于染色体14q22.23 区,共含3个外显子,编码由 289个氨基酸构成的转录因子,包含N末端结构域,1个高度保守的同源结构域和C末端转录激活域。其中高度保守的同源结构域为DNA结合域,与 DNA 序列相结合,可形成螺旋-转角-螺旋结构。
基因沉默:RNA干扰技术可以特异性剔除或关闭特定基因的表达,即引起基因沉默,是基因表达调控的一种重要方式,是生物体在基因调控水平上的一种自我保护机制。可利用基因沉默在基因治疗中有效抑制有害基因的表达,达到治疗疾病的目的。
摘要
背景:
研究成骨细胞的表达及分化有助于阐明骨性反牙合畸形下颌骨发育过度的分子机制。
目的:应用RNA干扰技术下调成骨细胞系hFOB1.19中OTX2基因的表达,进一步研究OTX2基因对成骨细胞增殖及分化的影响。
方法:实验分为6组:特异性OTX2-siRNA1、OTX2-siRNA2、OTX2-siRNA3组,GAPDH-siRNA组,阴性对照组和空白对照组。设计3个靶序列的小干扰RNA(iRNA),转染人成骨细胞hFOB 1.19。RT-PCR检测转染后成骨细胞中OTX2 mRNA水平的变化;Western Blot检测蛋白质表达水平;MTT法评估OTX2-siRNA对成骨细胞增殖的抑制作用;化学比色法检测细胞碱性磷酸酶活性。
结果与结论:①转染后,出现OTX2 mRNA水平下调,蛋白表达水平下调;②倒置显微镜下观察漂浮细胞OTX2-siRNA组明显多于各对照组,细胞增殖抑制率明显高于各对照组,OTX2-siRNA组碱性磷酸酶活性明显降低;③结果提示,化学合成的特异性OTX2-siRNA 转染人成骨细胞系hFOB1.19,能有效下调OTX2 mRNA水平;OTX2基因表达下调能够抑制hFOB1.19成骨细胞增殖;OTX2基因表达下调可降低hFOB1.19成骨细胞碱性磷酸酶活性,抑制其分化。

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
ORCID: 0000-0002-9399-4467(王晶)

关键词: hFOB1.19成骨细胞, OTX2基因, 小干扰RNA, RNA干扰, 基因沉默, 错牙合畸形

Abstract:

BACKGROUND: Studying the expression and differentiation of osteoblasts contributes to understanding the mechanism of hereditary mandibular deformity at molecular level.
OBJECTIVE: To down-regulate the expression of OTX2 gene and investigate the effect of OTX2 gene on the proliferation and differentiation of hFOB1.19 osteoblasts by RNA interference.
METHODS: There were six groups: synthesized OTX2- siRNA1, OTX2-siRNA2, OTX2-siRNA3, GAPDH-siRNA, negative control, and blank control groups. Three target sequence siRNAs were designed and transfected into the osteoblasts. The OTX2 mRNA level in osteoblasts was detected by RT-PCR after transfection. The protein expression level was detected by western blot assay. The inhibition of OTX2-siRNA on osteoblast proliferation was evaluated by MTT assay. The alkaline phosphatase activity was detected by chemical colorimetry.
RESULTS AND CONCLUSION: OTX2 mRNA and protein expression was down-regulated after transfection. In the OTX2-siRNA group, the number of loating cells and cell proliferation inhibition rate were higher and the alkaline phosphatase activity was decreased compared with the control group. Our findings indicate that the chemically synthesized OTX2-siRNA can effectively restrain mRNA expression level of OTX2 gene in hFOB1.19 osteoblasts. Interference of OTX2 gene can inhibit the proliferation of hFOB1.19 osteoblasts, and down-regulated expression level of OTX2 gene can reduce the alkaline phosphatase activity of hFOB1.19 osteoblasts and inhibit their differentiation.

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: Osteoblasts, RNA Interference, Cell Proliferation, Tissue Engineering

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