J Endod:葡萄糖载体2和4在MTA牙髓切断术牙髓愈合过程中的作用

2019-12-05 lishiting MedSci原创

盖髓材料促进牙髓形成一薄层的修复性牙本质而使受损牙髓得以愈合。这一过程需要葡萄糖促使损伤区域愈合。葡萄糖通过葡萄糖载体(Glut) 2和Glut4转运,它们是一种跨膜蛋白,充当着守卫的作用。研究推测:葡萄糖通过Glut2/Glut4的转运可能有助于损伤后愈合过程中牙本质桥的形成。因此,这篇研究的目的是为了评估MTA盖髓后在修复性牙本质形成过程中Glut2和Glut4的表达情况。

盖髓材料促进牙髓形成一薄层的修复性牙本质而使受损牙髓得以愈合。这一过程需要葡萄糖促使损伤区域愈合。葡萄糖通过葡萄糖载体(Glut) 2和Glut4转运,它们是一种跨膜蛋白,充当着守卫的作用。研究推测:葡萄糖通过Glut2/Glut4的转运可能有助于损伤后愈合过程中牙本质桥的形成。因此,这篇研究的目的是为了评估MTA盖髓后在修复性牙本质形成过程中Glut2和Glut4的表达情况。

研究对8周龄Wistar大鼠左侧上颌第一磨牙通过MTA实施牙髓切断术。术后1, 3, 5, 7和14天,通过免疫组化分析Glut2, Glut4, nestin (成牙本质细胞标志物)和抗内皮细胞抗原1 (RECA-1; 内皮细胞标记物)的表达定位和共区域化。通过实时聚合酶链式反应分析Slc2a2 (encoding Glut2), Slc2a4 (encoding Glut4), Igf-1r (encoding胰岛素样生长因子1受体)和nestin的mRNA表达。

结果显示,Glut2和Glut4表达于正常对照牙齿的成牙本质细胞和内皮细胞内。牙髓切断术3天后,能够检测到Glut2和Glut4表达阳性的细胞;牙髓切断术7天后,Glut2和Glut4的免疫反应局限于排列在修复性牙本质下方的新分化的成牙本质细胞样细胞内。在牙髓切断术后,Slc2a2和Slc2a4的mRNA表达明显上调。

结论:Glut2和Glut4在损伤下方调控损伤后愈合过程中的葡萄糖转运。这可能有助于为深龋患者研发全新的活髓疗法。

原始出处

Tohma A, Ohkura N, et al. Glucose Transporter 2 and 4 Are Involved in Glucose Supply during Pulpal Wound Healing after Pulpotomy with Mineral Trioxide Aggregate in Rat Molars. J Endod. 2019 Nov 22. pii: S0099-2399(19)30738-1. doi: 10.1016/j.joen.2019.10.003.

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    2020-11-11 mei539
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    2020-07-14 jxrzshh
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    2019-12-07 liuxiaona