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J Endod:热牙胶技术调节成牙骨质细胞的活力、热休克和矿化组织相关蛋白表达

2020-06-11 lishiting MedSci原创

这篇研究的目的是为了评估连续波加压技术(CWCT)和热塑牙胶注射技术对永生系小鼠成牙骨质细胞(OCCM.30)热休克蛋白(HSPs)和矿化组织相关蛋白mRNA表达的影响。

这篇研究的目的是为了评估连续波加压技术(CWCT)和热塑牙胶注射技术对永生系小鼠成牙骨质细胞(OCCM.30)热休克蛋白(HSPs)和矿化组织相关蛋白mRNA表达的影响。

研究去除了单根且直根管的人前磨牙的牙冠。根管预备至ProTaper Next X5 file (Dentsply Maillefer, Ballaigues, Switzerland)并结合2 mL 2.5%次氯酸钠冲洗。将牙根(12 ± 2 mm height)灭菌(121°C for 20 minutes)后垂直置于细胞培养皿上,在距离根尖孔1 mm处去除根尖部分,按照根管直径开口使用适当的组织培养插入物以适合有盖培养皿表面。研究分为6组:对照1 (without teeth), 对照2 (with teeth), AH Plus (Dentsply DeTrey, Konstanz, Germany), 单核充填(SC), CWCT和热塑牙胶注射充填法(TGI)。通过3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide细胞活性实验评估24和96小时OCCM.30细胞的活力。通过实时聚合酶链式反应评估HSP27, HSP70和HSP90以及矿化组织标记物(bone sialoprotein, osteocalcin, runt-related transcription factor 2, type I collagen, and alkaline phosphatase) mRNA的表达。

结果显示,除了对照组,所有组的OCCM.30细胞活性均减弱。SC技术与CWCT和TGI相比较的结果显示,热对于细胞活力具有明显的负面作用(P < .05)。与对照1组相比,所有测试组的HSP27, HSP70和HSP90 mRNA表达均显著降低(P < .01)。热牙胶技术与SC相比时,HSP27和HSP90 mRNA表达明显降低(P < .01)。CWCT组和SC组HSP70的转录活性相似。与SC组相比,TGI组HSP70 mRNA的表达更高。除了对照1组,所有组的bone sialoprotein, osteocalcin, runt-related transcription factor 2, type I collagen和alkaline phosphatase矿化组织标志物均受到抑制,但此负面作用高于热处理组(P < .05)。

结论:就此篇研究而言,热牙胶技术会减少成牙骨质细胞HSPs与矿化组织相关蛋白的mRNA表达。然而,还需要动物实验进一步阐明热对于成牙骨质细胞组织学行为长期和短期的影响。

原始出处:

Nazife Tuğba Azmaz, Serife Buket Bozkurt., et al. Warm Gutta-Percha Techniques Regulate Cell Viability, Heat Shock, and Mineralized Tissue-associated Proteins of Cementoblasts. J Endod., 2020 May 18;S0099-2399(20)30240-5. doi: 10.1016/j.joen.2020.04.003.

 

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    2021-01-11 yahu
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    2020-06-13 xuyu
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    2020-06-13 Eleven17

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