2型糖尿病对牙纸的血管性影响
1Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin, New Zealand.
International endodontic journal
|December 9, 2024
概括
2型糖尿病 (T2D) 和高血糖会损害牙脉血管和血管原生标志物. 这表明VEGF和ANG-Tie1/Tie2信号受损,影响糖尿病患者的脉愈合.
科学领域:
- 口腔生物学 口腔生物学
- 内分泌学 在内分泌学.
- 血管生物学 血管生物学
背景情况:
- 2型糖尿病 (T2D) 是一种影响微血管系统的全身性疾病.
- 在T2D中,高血糖会导致伤口愈合和血管生成受损.
- 牙纸对高血糖的反应尚未完全理解.
研究的目的:
- 为了研究T2D和高血糖症对牙纸血管的影响.
- 在糖尿病条件下,分析牙纸中的血管性标记物.
- 评估人类牙纤维细胞 (hDPCs) 对不同度的葡萄糖的反应.
主要方法:
- 从T2D和对照患者的牙纤维组织分析,使用组织学和免疫组织化学染色.
- 在体外培养的hDPC暴露于不同的葡萄糖水平 (5.5 mM,12.5 mM,25 mM).
- 通过qPCR和ELISA评估细胞活力,新陈代谢活性和血管原因子 (VEGF,ANG) 和受体 (VEGFR2,TIE) 的基因/蛋白质表达.
主要成果:
- T2D牙纸表现出加厚的血管壁与增加的原蛋白和弹性质.
- 在T2D样本中缺少VEGFR2 (一个关键的VEGF受体),但在对照中存在.
- 超血糖症降低了hDPC活力和上调的angiopoietin-2 (ANG2) mRNA,而在高葡萄糖条件下没有检测到VEGFR2表达.
结论:
- 二型糖尿病和高血糖可能会损害牙纸的血管生成能力.
- 观察到的VEGFR2稀缺性和升高的ANG2表明VEGF和ANG-Tie1/Tie2信号通路受损.
- 这些发现表明,糖尿病患者的脉愈合延迟的潜在机制.
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