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EphrinB2/EphB4在牙槽骨吸收-重建过程中的作用

, PP. 2331-2335

Keywords: 成骨细胞,破骨细胞,EphrinB/EphB,牙槽骨吸收动物模型

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Abstract:

目的初步探讨EphrinB2/EphB4信号在牙槽骨吸收及骨重建过程中的表达及其意义。方法采用RT-PCR及Westernblot方法分别检测小鼠RAW264.7细胞体外诱导前后、小鼠MC3T3-E1细胞骨吸收上清处理前后?EphrinB2?及EphB4的表达情况。以免疫组化(S-P)法、免疫荧光等方法检测大鼠实验性牙槽骨吸收模型牙体牙周联合标本中EphrinB2、EphB4的表达情况。结果EphrinB2和EphB4在小鼠RAW264.7细胞、MC3T3-E1细胞中均有明显的表达,骨吸收上清作用于MC3T3-E1细胞后,分化的成骨细胞EphrinB2表达量(17.53±0.43)较阴性对照组(15.67±0.45)有显著升高(P<0.01);采用E-LPS注射法成功制备了稳定、可靠的实验性大鼠牙槽骨吸收模型,模型中免疫荧光结果可见EphB4和EphrinB2分别在牙槽骨缘成骨细胞及破骨细胞存在区的高信号。结论EphrinB2/EphB4信号参与了骨吸收-重建过程,成骨细胞和破骨细胞均可共表达EphrinB2/EphB4并可能存在成骨细胞间的EphrinB2/EphB4传导完成促进成骨活动。

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