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大鼠正畸牙移动过程中牙周组织TrkA的表达变化

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摘要 目的:了解大鼠正畸牙移动过程中牙周组织内神经生长因子特异性酪氨酸蛋白激酶受体(TrkA)的变化,探讨TrkA在正畸牙移动过程中的作用。方法:将85只体重(200±10)g雄性SD大鼠,随机分为空白对照组、实验加力组和对照不加力组,并各分为6 h、12 h、24 h、3天、5天、7天、14天、21天亚组,每组5只。选择左上第一磨牙作为实验牙,制备大鼠正畸牙移动不同时间牙周组织切片,进行HE染色和免疫组织化学研究。结果:正畸牙移动过程中,牙周组织内TrkA表达发生改变。TrkA表达量在正畸模型加载后先轻微下调后上调,实验加力组和对照不加力组分别于第7天、第3天时Trk A表达水平达到最高,所有观察区域牙周膜内TrkA表达显著增加,且实验组明显高于对照组。结论:TrkA在正畸牙移动过程中牙周组织改建的多个阶段起作用,参与了牙周膜早期的炎症反应、修复和晚期的改建。
出处 《南京医科大学学报(自然科学版)》 CAS CSCD 北大核心 2011年第2期210-212,264,共4页 Journal of Nanjing Medical University(Natural Sciences)
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