中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (7): 999-1004.doi: 10.12307/2022.135

• 脂肪干细胞 adipose-derived stem cells • 上一篇    下一篇

糖尿病骨质疏松症模型小鼠脂肪干细胞的成骨能力

高俞锦1,彭双麟 1,马治超1,陆  诗1,曹花月1,王  浪 1,肖金刚1,2,3   

  1. 1西南医科大学口腔医学院,四川省泸州市  646000;2西南医科大学附属医院口腔颌面外科,四川省泸州市  646000;3西南医科大学口颌面修复重建和再生实验室,四川省泸州市  646000
  • 收稿日期:2021-03-18 修回日期:2021-03-20 接受日期:2021-04-23 出版日期:2022-03-08 发布日期:2021-10-29
  • 通讯作者: 肖金刚,博士,教授,西南医科大学口腔医学院,四川省泸州市 646000;西南医科大学附属医院口腔颌面外科,四川省泸州市 646000;西南医科大学口颌面修复重建和再生实验室,四川省泸州市 646000
  • 作者简介:高俞锦,女,1995年生,浙江省绍兴市人,西南医科大学在读硕士,主要从事口腔种植的临床与基础研究。
  • 基金资助:
    国家自然科学基金项目(81870746),项目负责人:肖金刚;泸州市人民政府-西南医科大学科技战略合作项目(2020LZXNYDZ09),项目负责人:肖金刚

Osteogenic ability of adipose stem cells in diabetic osteoporosis mice

Gao Yujin1, Peng Shuanglin1, Ma Zhichao1, Lu Shi1, Cao Huayue1, Wang Lang1, Xiao Jingang1, 2, 3   

  1. 1School of Stomatology of Southwest Medical University, Luzhou 646000, Sichuan Province, China; 2Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Southwest Medical University, Luzhou 646000, Sichuan Province, China; 3Orofacial Reconstruction and Regeneration Laboratory of Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • Received:2021-03-18 Revised:2021-03-20 Accepted:2021-04-23 Online:2022-03-08 Published:2021-10-29
  • Contact: Xiao Jingang, MD, Professor, School of Stomatology of Southwest Medical University, Luzhou 646000, Sichuan Province, China; Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Southwest Medical University, Luzhou 646000, Sichuan Province, China; Orofacial Reconstruction and Regeneration Laboratory of Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • About author:Gao Yujin, Master candidate, School of Stomatology of Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81870746 (to XJG); the Science and Technology Strategic Cooperation Project of Luzhou Municipal People’s Government-Southwest Medical University, No. 2020LZXNYDZ09 (to XJG)

摘要:

文题释义:
长链非编码RNA-DANCR:长链非编码RNA是一类不编码蛋白且长度超过200个核苷酸的RNA,通过多种方式调控基因表达。分化拮抗非蛋白编码RNA-DANCR作为长链非编码RNA因其抑制祖细胞分化而被关注,其在细胞分化过程中下调。DANCR在多种疾病模型中显示能够影响细胞的增殖分化。
糖尿病性骨质疏松:是糖尿病常见的并发症,常伴发骨量的丧失和骨结构的破坏,增加骨折风险。
背景:长链非编码RNA(long noncoding RNA,LncRNA)-DANCR可调节包括骨代谢的多个生物学过程。课题组基因芯片结果显示糖尿病骨质疏松小鼠脂肪组织中LncRNA-DANCR显著高表达。
目的:探究LncRNA-DANCR通过Wnt/β-catenin信号通路对糖尿病骨质疏松小鼠脂肪干细胞成骨能力的影响。
方法:分离培养糖尿病骨质疏松小鼠和正常对照小鼠脂肪干细胞,成骨诱导3 d后,采用qRT-PCR、Western blot检测LncRNA-DANCR、Wnt信号分子β-catenin以及成骨转录因子(RUNX2、OPN)的表达。设计LncRNA-DANCR特异性siRNA转染糖尿病骨质疏松小鼠脂肪干细胞,成骨诱导3 d后,采用qRT-PCR、Western blot和碱性磷酸酶染色检测Wnt信号分子β-catenin、成骨转录因子(RUNX2、OPN)的表达以及成骨能力改变。
结果与结论:①成骨诱导3 d后,糖尿病骨质疏松小鼠脂肪干细胞的LncRNA-DANCR表达水平显著高于正常对照小鼠脂肪干细胞,Wnt信号分子β-catenin和成骨转录因子RUNX2、OPN的表达显著低于正常对照小鼠脂肪干细胞;②siRNA转染糖尿病骨质疏松小鼠脂肪干细胞成骨诱导3 d后,β-catenin以及RUNX2、OPN显著高表达,成骨能力增强;③结果表明,LncRNA-DANCR通过抑制Wnt/β-catenin信号通路降低糖尿病骨质疏松小鼠脂肪干细胞的成骨能力,沉默LncRNA-DANCR可恢复其成骨能力。

https://orcid.org/0000-0003-1300-7191(肖金刚) 

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: 长链非编码RNA, Wnt信号通路, 糖尿病, 骨质疏松, 骨向分化, 骨修复

Abstract: BACKGROUND: Long noncoding RNA (LncRNA)-DANCR can regulate multiple biological processes, including bone metabolism. Our gene microarray results showed that LncRNA-DANCR was significantly overexpressed in diabetic osteoporosis mice. 
OBJECTIVE: To investigate the effect of LncRNA-DANCR on the osteogenic ability of adipose stem cells in diabetic osteoporosis through Wnt/β-catenin signaling pathway.
METHODS: Diabetic osteoporosis adipose-derived stem cells and control adipose-derived stem cells were isolated and cultured. After 3 days of osteogenic induction, real-time fluorescence quantitative PCR and western blot assay were used to examine the expression of LncRNA-DANCR, Wnt signaling molecules β-catenin and osteogenic transcription factors (RUNX2 and OPN). Diabetic osteoporosis adipose-derived stem cells transfected with lncRNA-DANCR-specific siRNA were designed. After 3 days of osteogenic induction, real-time fluorescence quantitative PCR, western blot assay and alkaline phosphatase staining were used to examine the expression of Wnt signaling molecules β-catenin, osteogenic transcription factors RUNX2 and OPN and osteogenic ability changes.  
RESULTS AND CONCLUSION: (1) After 3 days of osteogenic induction, the expression level of LncRNA-DANCR in diabetic osteoporosis adipose-derived stem cells group was significantly higher than that in control group. The expression levels of Wnt signaling molecule β-catenin and osteogenic transcription factors RUNX2 and OPN were significantly lower than those in control adipose-derived stem cells. (2) After 3 days of osteogenic induction, β-catenin and RUNX2 and OPN were highly expressed in the siRNA silent group, and the ability of bone formation was enhanced. (3) The results confirmed that LncRNA-DANCR decreased the osteogenic capacity of diabetic osteoporosis adipose-derived stem cells by inhibiting the Wnt/β-catenin signaling pathway. Silencing of LncRNA-DANCR can restore the reduced osteogenic capacity.


Key words: long noncoding RNA, Wnt signaling pathway, diabetes, osteoporosis, osteogenic differentiation, bone repair 

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