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- 2018
甲基丙烯酸羟乙酯对人牙髓组织的毒性及自噬研究
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Abstract:
摘要 目的:探讨HEMA(甲基丙烯酸羟乙酯,2-Hydroxyethyl methacrylate)对牙髓的毒性作用及自噬相关机制。方法:构建新鲜健康年轻恒牙的切片器官培养模型,8 mmol/L HEMA刺激牙切片器官。CCK-8检测HEMA处理12、24、48 h牙切片器官内牙髓组织的活力;苏木精-伊红染色检测48 h后牙髓组织内剩余细胞密度;透射电镜观察不同时间段细胞亚显微结构的变化;组织荧光检测自噬标志分子LC3表达。结果:8 mmol/L HEMA明显抑制牙髓组织活性,并呈现时间依赖性,48 h存活率仅为37.5%。HEMA处理后牙髓组织中细胞亚显微结构改变,并可见明显增加的自噬溶酶体。与对照组相比,HEMA处理组中LC3呈点状聚集,表达明显升高。结论:8 mmol/L HEMA对人牙髓组织有明显的毒性作用,其机制与细胞自噬活化水平的升高有关
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