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J Clin Periodontol:PPARγ对大鼠实验性牙周炎的双重作用

2018-03-26 MedSci MedSci原创

本实验旨在探讨PPARγ对实验性牙周炎大鼠炎症控制和骨重建的影响。

本实验旨在探讨PPARγ对实验性牙周炎大鼠炎症控制和骨重建的影响。

通过在下颌第一磨牙牙颈部结扎诱导大鼠实验性牙周炎。 大鼠腹腔内注射PPARγ激动剂,拮抗剂和赋形剂。将96只雄性SD大鼠随机分为对照组,结扎+赋形剂,结扎+激动剂和结扎+拮抗剂组。经过1周,4周和8周后,通过Micro-CT和HE染色评估牙槽骨吸收状况。通过ELISA和免疫组织化学检查评估炎症和骨代谢因子。通过TRAP染色定量测定破骨细胞。

结果:激动剂组在1周后牙槽骨吸收明显减少,8周后牙槽骨吸收明显增加,而拮抗剂组则呈现相反趋势。激动剂组在1周和4周后一些炎性细胞因子的表达降低,8周后OPG,RUNX2,BMP-2下调和RANKL上调,而拮抗剂效果相反。 PPARγ激动剂在1周后破骨细胞计数显着减少,8周后增加。

结论:在牙周炎发展过程中,PPARγ可以抑制炎症反应,在短时间内防止骨吸收,而长期的PPARγ激活会导致骨吸收增加,拮抗剂对PPARγ的抑制会促进牙槽骨生成。

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    2018-08-17 feather89
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    2018-06-01 lujian
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    2018-03-26 wqkm

    ^_^^_^^_^

    0

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