中国组织工程研究 ›› 2024, Vol. 28 ›› Issue (1): 38-43.doi: 10.12307/2023.791

• 牙髓及牙周膜干细胞 Dental pulp and periodontal ligament stem cells • 上一篇    下一篇

LncRNA SNHG4调控牙周膜干细胞成骨分化过程中的miR-152-3p

周明华1,胡晓宇2    

  1. 1河南财经政法大学医院口腔科,河南省郑州市   450046;2平顶山学院附属口腔医院,河南省平顶山市   467000
  • 收稿日期:2022-12-16 接受日期:2023-01-18 出版日期:2024-01-08 发布日期:2023-06-28
  • 通讯作者: 周明华,主治医师,河南财经政法大学医院口腔科,河南省郑州市 450046
  • 作者简介:周明华,女,1984年生,汉族,2008年郑州大学毕业,主治医师,主要从事牙周黏膜方面的研究。

LncRNA SNHG4 regulates miR-152-3p during osteoblastic differentiation of periodontal ligament stem cells

Zhou Minghua1, Hu Xiaoyu2   

  1. 1Department of Stomatology, Henan University of Economics and Law Hospital, Zhengzhou 450046, Henan Province, China; 2Stomatological Hospital, Pingdingshan College, Pingdingshan 467000, Henan Province, China
  • Received:2022-12-16 Accepted:2023-01-18 Online:2024-01-08 Published:2023-06-28
  • Contact: Zhou Minghua, Attending physician, Department of Stomatology, Henan University of Economics and Law Hospital, Zhengzhou 450046, Henan Province, China
  • About author:Zhou Minghua, Attending physician, Department of Stomatology, Henan University of Economics and Law Hospital, Zhengzhou 450046, Henan Province, China

摘要:


文题释义:

长链非编码RNA:是一类长度大于200个碱基的RNA,其可参与许多生物过程,例如基因表达的转录、转录后调控等。长链非编码RNA可作为miRNA海绵发挥作用,影响miRNA的表达水平和活性。越来越多的证据表明,长链非编码RNA的失调与牙周膜干细胞的成骨分化有关。

miRNAs:是一类内源性非编码小RNA分子,长度为18-22个核苷酸。成熟的miRNA与目标mRNA 的3’-非翻译区(UTR)结合并抑制其翻译或诱导其降解。通过基因表达的转录后调控,miRNA已被证明可以调节许多生物过程,包括肿瘤发生、细胞增殖和分化。miRNA与成骨分化密切相关。


背景:研究表明长链非编码RNA核仁小RNA宿主基因4(LncRNA SNHG4)参与了多种炎症性疾病的进展,而关于LncRNA SNHG4对牙周炎治疗过程中人牙周膜干细胞成骨分化的影响尚不明确。
目的:探讨LncRNA SNHG4通过调节miR-152-3p对人牙周膜干细胞成骨分化的影响。
方法:从因正畸需要而拔除的前磨牙牙周膜组织中分离出人牙周膜干细胞,将其进行成骨诱导分化0,7,14 d后,qRT-PCR检测Runt相关转录因子2、骨钙素、LncRNA SNHG4及miR-152-3p表达。取第3代人牙周膜干细胞,将其分为NC组、pcDNA组、pcDNA-SNHG4组、inhibitor NC组、miR-152-3p inhibitor组、pcDNA-SNHG4+mimic NC组、pcDNA-SNHG4+miR-152-3p mimic组,qRT-PCR检测各组人牙周膜干细胞中LncRNA SNHG4、miR-152-3p表达,CCK-8法检测细胞增殖情况;比色法检测碱性磷酸酶活性;茜素红染色检测矿化结节形成情况;Western blot检测Runt相关转录因子2、骨钙素、碱性磷酸酶蛋白表达;双荧光素酶报告基因实验验证LncRNA SNHG4与miR-152-3p的关系。

结果与结论:①与成骨诱导0 d比较,成骨诱导7,14 d后人牙周膜干细胞中Runt相关转录因子2、骨钙素、LncRNA SNHG4表达升高,   miR-152-3p表达降低(P < 0.05);②过表达LncRNA SNHG4或抑制miR-152-3p均可提高人牙周膜干细胞的增殖能力及碱性磷酸酶活性、矿化结节形成量和Runt相关转录因子2、骨钙素、碱性磷酸酶的蛋白表达(P < 0.05);miR-152-3p mimic减弱了过表达LncRNA SNHG4对人牙周膜干细胞成骨分化的促进作用;LncRNA SNHG4与miR-152-3p存在靶向关系;③结果表明,过表达LncRNA SNHG4可能通过抑制miR-152-3p促进人牙周膜干细胞成骨分化。

https://orcid.org/0000-0002-0107-9756 (周明华) 

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, 核仁小RNA宿主基因4, 牙周膜干细胞, 成骨分化

Abstract: BACKGROUND: Studies have shown that long non-coding RNA small nucleolar RNA host gene 4 (lncRNA SNHG4) is involved in the progress of many inflammatory diseases, but the effect of lncRNA SNHG4 on the osteogenic differentiation of human periodontal ligament stem cells during the treatment of periodontitis is still unclear.  
OBJECTIVE: To investigate the effect of lncRNA SNHG4 on the osteogenic differentiation of human periodontal ligament stem cells by regulating miR-152-3p.
METHODS: Human periodontal ligament stem cells were isolated from periodontal membranes of premolars extracted for orthodontic purposes. After human periodontal ligament stem cells were induced to differentiate into osteoblasts for 0, 7, and 14 days, the expression levels of RUNX family transcription factor 2, osteocalcin mRNA, lncRNA SNHG4 and miR-152-3p in human periodontal ligament stem cells were detected by qRT-PCR. The third-generation human periodontal ligament stem cells were divided into the NC group, pcDNA group, pcDNA-SNHG4 group, inhibitor NC group, miR-152-3p inhibitor group, pcDNA-SNHG4+mimic NC group, and pcDNA-SNHG4+miR-152-3p mimic group. The expression of lncRNA SNHG4 and miR-152-3p in human periodontal ligament stem cells was detected by qRT-PCR. The proliferation of human periodontal ligament stem cells was detected by CCK-8 assay. Alkaline phosphatase activity was detected by colorimetry. The formation of mineralized nodules was detected by alizarin red staining. Western blot assay was used to detect the expression of RUNX family transcription factor 2, osteocalcin and alkaline phosphatase proteins. A double luciferase reporter gene experiment was applied to verify the relationship between lncRNA SNHG4 and miR-152-3p.  
RESULTS AND CONCLUSION:  (1) The expression of RUNX family transcription factor 2, osteocalcin mRNA and lncRNA SNHG4 in human periodontal ligament stem cells after 7 and 14 days of osteogenic induction was higher than that after 0 days of osteogenic induction, while the expression of miR-152-3p was lower (P < 0.05). (2) Overexpression of lncRNA SNHG4 or inhibition of miR-152-3p was able to enhance the proliferation of human periodontal ligament stem cells, the alkaline phosphatase activity, mineralized nodule formation, the expression of RUNX family transcription factor 2, osteocalcin, and alkaline phosphatase proteins (P < 0.05). miR-152-3p mimic attenuated the promoting effect of overexpression of lncRNA SNHG4 on osteogenic differentiation of human periodontal ligament stem cells. LncRNA SNHG4 had a targeting relationship with miR-152-3p. (3) These findings indicate that overexpression of lncRNA SNHG4 may promote the osteogenic differentiation of human periodontal ligament stem cells by inhibiting miR-152-3p.

Key words: long non-coding RNA, small nucleolar RNA host gene 4, periodontal ligament stem cell, osteogenic differentiation

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