中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (25): 4018-4024.doi: 10.3969/j.issn.2095-4344.1784

• 干细胞培养与分化 stem cell culture and differentiation • 上一篇    下一篇

姜黄素通过Wnt信号通路调节人牙髓干细胞的成牙本质分化

陈冬梅1,徐丽丽2,周建伟1 
  

  1. 西南医科大学附属医院,1中医科,2康复医学科,四川省泸州市  646000
  • 修回日期:2019-04-15 出版日期:2019-09-08 发布日期:2019-09-08
  • 通讯作者: 周建伟,博士生导师,主任中医师,西南医科大学附属医院中医科,四川省泸州市 646000
  • 作者简介:陈冬梅,女,1985年生,四川省眉山市人,汉族,2008年成都中医药大学毕业,主治中医师,主要从事针灸康复研究。
  • 基金资助:

    四川省科学技术厅项目(2014SZ0235),项目负责人:徐丽丽

Curcumin regulates odontogenic differentiation of human dental pulp stem cells through Wnt signaling pathway

Chen Dongmei1, Xu Lili2, Zhou Jianwei1
  

  1. 1Department of Traditional Chinese Medicine, 2Department of Rehabilitation, Affiliated Hospital of Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • Revised:2019-04-15 Online:2019-09-08 Published:2019-09-08
  • Contact: Zhou Jianwei, Doctoral supervisor, Chief physician, Department of Rehabilitation, Affiliated Hospital of Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • About author:Chen Dongmei, Attending physician, Department of Traditional Chinese Medicine, Affiliated Hospital of Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • Supported by:

    the Project of Sichuan Provincial Science and Technology Department, No. 2014SZ0235 (to XLL)

摘要:

文章快速阅读:

文题释义:
牙髓干细胞与组织工程:
牙髓干细胞是从牙髓组织中获得的具有高度增殖活性、自我更新能力和超强可塑性的成体干细胞。目前,牙髓干细胞在组织工程应用中的研究主要集中在牙周组织再生、神经元分化、成骨骼肌分化和血管内皮细胞再生方面,特别是成骨/成牙本质化方向,为牙周组织损伤的功能化修复带来希望。        
姜黄素:是一种从天然植物姜黄的根茎中提取的酚类色素,具有抗炎、抗氧化和抗肿瘤等多种生物活性作用。近来的研究发现,姜黄素在干细胞增殖、凋亡、成骨分化和旁分泌等方面发挥调节作用。临床研究证实,姜黄素在牙周炎的治疗方面取得了令人满意的临床效果,但其在牙周组织修复中的作用及机制尚不明确。  

 

摘要
背景:
研究证实,姜黄素不仅可促进成体干细胞成骨分化还可通过激活Wnt信号通路促进神经干细胞的增殖与分化。但姜黄素能否通过激活Wnt信号通路促进人牙髓干细胞成牙本质分化尚未见报道。
目的:探讨姜黄素对人牙髓干细胞增殖和成牙本质分化的影响及其可能机制。
方法:将人牙髓干细胞(购于上海妍生实业有限公司)分为6组:正常对照组不进行干预,低、中、高浓度姜黄素组用50,250,500 nmol/L姜黄素干预,IWR-1组用1 μmol/L Wnt信号通路抑制剂IWR-1干预,IWR-1+姜黄素组用1 μmol/L IWR-1和500 nmol/L姜黄素干预。各组进行矿化诱导7 d和14 d后,实时定量PCR检测Wnt5a、碱性磷酸酶、牙本质涎磷蛋白的mRNA表达;Western blot检测Wnt5a、β-catenin、骨唾液酸蛋白、牙本质涎磷蛋白、骨钙蛋白、牙本质基质蛋白1水平;比色法检测细胞碱性磷酸酶活性;CCK-8法检测细胞增殖活性。
结果与结论:①姜黄素能够提高牙髓干细胞增殖活性和碱性磷酸酶活性,且呈时间和剂量依赖性;②姜黄素能够提高牙髓干细胞中牙本质涎磷蛋白、碱性磷酸酶的mRNA表达以及牙本质涎磷蛋白、牙本质基质蛋白1、骨唾液酸蛋白和骨钙蛋白水平,且呈时间和剂量依赖性;③姜黄素能够提高牙髓干细胞中Wnt5a和β-catenin蛋白的表达,且呈时间和剂量依赖性;④IWR-1+姜黄素组人牙髓干细胞中Wnt5a mRNA表达以及Wnt5a、牙本质涎磷蛋白、牙本质基质蛋白1、骨唾液酸蛋白及骨钙蛋白水平和增殖活性高于正常对照组和IWR-1组(P < 0.05);⑤以上结果表明,姜黄素通过激活Wnt信号通路促进人牙髓干细胞的增殖和成牙本质分化。


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
ORCID: 0000-0001-8680-2343(陈冬梅)

关键词: 牙髓干细胞, 姜黄素, Wnt信号通路, 成牙本质分化, 成骨分化, 牙齿再生, 细胞增殖

Abstract:

BACKGROUND: Studies have shown that curcumin not only promotes osteogenic differentiation of adult stem cells, but also promotes proliferation and differentiation of neural stem cells by activating the Wnt signaling pathway. However, there is no report on whether curcumin can promote odontoblast the differentiation of human dental pulp stem cells by activating the Wnt signaling pathway. 
OBJECTIVE: To investigate the effect of curcumin on the proliferation and odontogenic differentiation of human dental pulp stem cells and its possible mechanism. 
METHODS: Human dental pulp stem cells (purchased from Shanghai Yansheng Industrial Co., Ltd., China) were divided into six groups according to different intervention methods. The normal control group was not intervened. Low-, medium- and high-concentration curcumin groups were treated with 50, 250, and 500 nmol/L curcumin, respectively. IWR-1 group was intervened with 1 μmol/L Wnt signaling pathway inhibitor IWR-1. IWR-1+curcumin group were treated with 1 μmol/L IWR-1 and 500 nmol/L curcumin. After 7 and 14 days of mineralization, the mRNA levels of Wnt5a, alkaline phosphatase and dentin sialophosphoprotein were detected by real-time quantitative PCR. The protein levels of Wnt5a, β-catenin, bone sialic acid protein, dentin sialophosphoprotein, osteocalcin and dentin matrix protein 1 were detected by western blot. The activity of alkaline phosphatase was detected by colorimetry, and the proliferation activity of the cells was detected by cell counting kit-8 method. 
RESULTS AND CONCLUSION: (1) Curcumin had a time-dependent and dose-dependent effect on the proliferation of dental pulp stem cells. (2) Curcumin had a time- and dose-dependent effect on the mRNA expressions of dentin sialophosphoprotein and alkaline phosphatase, as well as the protein expressions of dentin sialophosphoprotein, dentin matrix protein 1, bone sialoprotein and osteocalcin in dental pulp stem cells. (3) Curcumin up-regulated the expressions of Wnt5a and β-catenin proteins in dental pulp stem cells in a time- and dose-dependent manner. (4) Compared with the control and IWR-1 groups, the combination of curcumin and IWR-1 significantly increased the expressions of Wnt5a mRNA and protein, dentin sialophosphoprotein, dentin matrix protein 1, and bone sialoprotein and osteocalcin proteins in human dental pulp stem cells, and significantly promoted the proliferative ability of the cells (P < 0.05). These results suggest that curcumin promotes the proliferation and odontogenic differentiation of human dental pulp stem cells by activating the Wnt signaling pathway.

Key words: dental pulp stem cells, curcumin, Wnt signaling pathway, odontogenic differentiation, osteogenic differentiation, dental regeneration, cell proliferation

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