中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (7): 1097-1102.doi: 10.3969/j.issn.2095-4344.1022

• 组织构建细胞学实验 cytology experiments in tissue construction • 上一篇    下一篇

脂联素干预高糖介导人牙周膜细胞凋亡的相关机制

林仰东,殷  恺   

  1. (天津市第一中心医院口腔科,天津市  300192)
  • 收稿日期:2018-09-02 出版日期:2019-03-08 发布日期:2019-03-08
  • 通讯作者: 林仰东,硕士,副主任医师,天津市第一中心医院口腔科 天津市300192
  • 作者简介:林仰东,男,1969年生,广东省揭西县人,汉族,2014年天津医科大学毕业,硕士,副主任医师,主要从事口腔干细胞研究。

Mechanism underlying adiponectin intervention on the apoptosis of human periodontal ligament cells mediated by high glucose

Lin Yangdong, Yin Kai   

  1.  (Department of Stomatology, Tianjin First Central Hospital, Tianjin 300192, China)
  • Received:2018-09-02 Online:2019-03-08 Published:2019-03-08
  • Contact: Lin Yangdong, Department of Stomatology, Tianjin First Central Hospital, Tianjin 300192, China)
  • About author:Lin Yangdong, Master, Associate chief physician, Department of Stomatology, Tianjin First Central Hospital, Tianjin 300192, China

摘要:

文章快速阅读:

文题释义:
脂联素:是脂肪细胞分泌的一种内源性生物活性多肽或蛋白质,是一种胰岛素增敏激素,能改善小鼠的胰岛素抗性和动脉硬化症;对人体的研究发现,脂联素水平能预示2型糖尿病和冠心病的发展,并在临床试验表现出抗糖尿病、抗动脉粥样硬化和炎症的潜力。
牙周膜细胞:是牙周膜中最常见的细胞,其不断形成新的主纤维、牙骨质,并改建牙槽骨,对牙周组织的修复十分重要,是牙周治疗后形成牙龈与牙根面新附着的主要细胞来源。
摘要
背景
:脂联素是最近发现的一种由脂肪细胞分泌的特异蛋白质,因其在调节糖脂代谢和抗氧化应激等方面的功效,而被认为是治疗糖尿病及其并发症的潜在物质。
目的:探讨脂联素干预对高糖介导人牙周膜细胞凋亡及其经典Wnt/β-catenin信号转导通路的影响。
方法:体外复苏培养人牙周膜细胞。将所有细胞随机平均分为4组:对照组(正常RPMI1640完全培养基,葡萄糖浓度为11 mmol/L),高糖组(葡萄糖浓度40 mmol/L的RPMI1640培养基),甘露醇组(RPMI1640培养基+甘露醇19.5 mmol/L)和脂联素组(葡萄糖浓度40 mmol/L的RPMI1640培养基+20 mg/L脂联素)。在培养24-96 h后的不同时间点,采用MTT法检测各组细胞的细胞存活情况,采用流式细胞术检测各组细胞周期及凋亡情况的变化。通过RT-PCR和Western blot检测Wnt1、Wnt10b及β-catenin的表达水平。
结果与结论:①高糖在体外对人牙周膜细胞有显著的抑制增殖和促进凋亡作用,但对细胞周期的影响不明显;②人牙周膜细胞经体外高糖培养基培养24-96 h后,其抑制增殖作用呈时间依赖性;而脂联素则显著提高了高糖干预下细胞的增殖并抑制了细胞凋亡(P < 0.05);③RT-PCR和Western blot结果显示,与对照组及甘露醇组相比,高糖组Wnt1、Wnt10b及β-catenin mRNA和蛋白表达水平显著下降(P < 0.05),脂联素干预后Wnt1、Wnt10b及β-catenin mRNA和蛋白表达水平明显升高(P < 0.05);④结果提示,高糖条件可以促进人牙周膜细胞凋亡,抑制细胞增殖,对细胞周期无显著影响。而脂联素可以抑制上述作用,可能通过上调Wnt1和Wnt10b表达继而激活Wnt/β-catenin信号转导通路发挥作用。

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: 0000-0002-1429-5175(林仰东)

关键词: 脂联素, 高糖环境, 人牙周膜细胞, Wnt/β-catenin信号转导通路, 细胞凋亡, 细胞增殖, 细胞周期, 牙周炎

Abstract:

BACKGROUND: Adiponectin is a recently discovered specific protein secreted by adipocytes, which has been shown to regulate glucose and lipid metabolism and protect against oxidative stress. Thereafter, adiponectin is a promising therapy for diabetes mellitus and its complications. 
OBJECTIVE: To investigate the effect of the classic Wnt/β-catenin signaling pathway on the apoptosis of human periodontal ligament cells mediated by high glucose after the intervention of adiponectin.
METHODS: Human periodontal ligament cells were revived and cultured in vitro. The cells were randomly divided into control group (normal RPMI1640 culture medium containing 11 mmol/L glucose), high glucose group (40 mmol/L glucose in the RPMI1640 culture medium), mannitol group (19.5 mmol/L mannitol in RPMI1640 culture medium) and adiponectin group (40 mmol/L glucose in the RPMI1640 culture medium+20 mg/L adiponectin). In different time points (24-96 hours), the cell survival rate in each group was detected by MTT assay. The cell cycle distribution and the cell apoptosis was detected by flow cytometry. The Wnt1, Wnt10b and β-catenin gene and protein expression levels were determined by RT-PCR and western blot assay, respectively.
RESULTS AND CONCLUSION: The high level glucose could inhibit the cell proliferation, improve the cell apoptosis and had no obvious effect on the cell cycle. The effect to decrease the cell proliferation was in a time-dependent manner. But the adiponectin intervention significantly increased the cell proliferation and reduced the apoptosis, compared with the high glucose group (P < 0.05). Compared with the control and mannitol groups, the mRNA and protein expression levels of Wnt1, Wnt10b and β-catenin were significantly decreased in the high glucose group, while the levels in the adiponectin group were obviously increased (P < 0.05). To conclude, high glucose can improve the apoptosis of human periodontal ligament cells and inhibit the proliferation, but have no obvious effect on the cell cycle. Adiponetin can remit the effect induced by high glucose by up-regulating Wnt1 and Wnt10b expression and then activate the Wnt/β-catenin signaling pathway.

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: Adiponectin, Periodontal Ligament, Apoptosis, Wnt1 Protein, Tissue Engineering

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