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作 者:冯琴[1] 张凤秋[1] 孙正[1] 张辛燕[1] 刘洁[1]
机构地区:[1]首都医科大学口腔医学院牙周黏膜科,100050
出 处:《中华口腔医学杂志》2012年第10期605-609,共5页Chinese Journal of Stomatology
基 金:北京市自然科学基金(7093122);2009年北京市优秀人才培养资助个人项目(2009D003012000001)
摘 要:目的研究牙龈卟啉单胞菌(Porphyromonas gingivalis,Pg)超声提取物在人牙周膜细胞NF-κB受体激活蛋白配体(receptor activator of NF-κB ligand,RANKL)和护骨因子表达中的作用,探讨Pg在牙周炎患者牙槽骨吸收中的作用。方法用含有不同质量浓度(25、50mg/L)Pg超声提取物的培养液培养人牙周膜细胞6h(分别为25、50mg/L实验组),以未做处理的人牙周膜细胞作为空白对照组,运用实时定量聚合酶链反应检测细胞中RANKL及护骨因子mRNA的表达,蛋白质印迹法检测细胞中RANKL及护骨因子的蛋白表达。酶联免疫吸附测定法检测细胞培养液中护骨因子蛋白的表达,应用SPSS13.0统计软件对各组结果进行单因素方差分析,检验水准为双侧α=0.05。结果Pg超声提取物干预人牙周膜细胞后,25、50mg/L实验组细胞中RANKL mRNA(分别为0.253±0.033、0.350.±0.075)和蛋白的相对表达量(分别为0.782±0.008、1.281±0.072)均显著高于空白对照组(分别为0.126±0.035、0.240±0.019)(P〈0.05);50mg/L实验组护骨因子mRNA的相对表达量(0.087±0.021)显著低于空白对照组(0.240±0.019)(P〈0.01),25、50mg/L实验组护骨因子蛋白的相对表达量(分别为0.813±0.007、0.398±0.009)与空白对照组(1.131±0.005)相比均显著降低(P〈0.01),培养液中护骨因子蛋白的表达与空白对照组相比差异无统计学意义。结论Pg超声提取物作用6h后能促进人牙周膜细胞RANKL的表达,抑制护骨因子的表达,从而影响骨代谢。Objective To evaluate the effects of sonicated extracts of Porphyromonas gingivalis (Pg) on receptor activator of NF-κB ligand (RANKL) and osteoprotegerin (OPG) expression in human periodontal ligament cells ( HPDLC ) and the effect of Pg on bone resorption in periodontitis. Methods HPDLC were exposed to 25, 50 mg/L sonicated extracts of Pg for 6 h, HPDLC without treatment served as control. The expression of RANKL-OPG mRNA and protein were examined by real time polymerase chain reaction and Western blotting. OPG protein in the supernatant was examined by enzyme linked immunosorbent assay(ELISA). The data were statistically analyzed by SPSS 13.0 and one-way analysis of variance(ANOVA). Results When HPDLC were exposed to sonicated extracts of Pg, the expression of RANKL mRNA and protein in 25 mg/L and 50 mg/L groups were higher than that of control group (P 〈 0.05 ), the expression of OPG mRNA in 50 mg/L group (0. 087 ± 0.021 ) was lower than that of control group(0. 240 ± 0. 019) ( P 〈 0.05 ), and OPG protein in 25 mg/L and 50 mg/L groups ( 0. 813 ± 0. 007, 0. 398 ± 0. 009) was lower than that of control group (1.131±0. 005 ) (P 〈 0.01 ). OPG protein expression in the supernatant was not significantly different between experimental group and control group. Conclusions Sonicated extracts of Pg exposed to HPDLC can up-regulate RANKL expression, down-regulate OPG expression and influence bone metabolism.
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