幽门螺杆菌感染对人牙龈组织细胞凋亡的影响

目的:观察正常牙龈组织中幽门螺杆菌(Hp)的感染情况及其对人牙龈组织细胞凋亡的影响。方法:采用聚合酶链式反应(PCR)检测30例健康牙龈组织中Hp感染情况,应用脱氧核糖核苷酸末端转移酶介导的原位缺口末端标记(TUNEL)法检测牙龈组织中的细胞凋亡指数,分析Hp对牙龈组织的毒性作用。结果:PCR检测的30名患者,Hp阳性率为40%。在TUNEL结果中,可见Hp阳性组有大量棕色凋亡细胞,部分细胞核固缩成团或核膜周围边集成环状。而正常对照组中阳性凋亡细胞较Hp感染组明显偏低,2组细胞凋亡指数差异有统计学意义。结论:Hp感染可能是引起牙龈组织细胞凋亡的因素之一。

Correlation between Helicobacter pylori infection and apoptosis in gingival tissues

AIM:To observe the effects of Helicobacter pylori(Hp) on the apoptosis of human gingival tissue.METHODS:Gingival tissue samples were taken from 30 patients without chronic periodontitis,and Hp was detected by conventional PCR.The apoptosis of the gingivival cells was detected by terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) to analyze the correlation between Hp infection and apoptosis of the gingival tissues.RESULTS:The Hp positive detections were 12 in the 30 patients without periodontitis,so the positive rate of Hp in the gingival tissue samples was 40%.The gingival tissue showed a large number of apoptotic cells in Hp positive group,and less apoptotic cells in Hp negative group.The apoptotic index in Hp positive group (0.498±0.092) was significantly higher than that in normal group (0.207±0.053)(P<0.05).CONCLUSION:Hp might play a role in the apoptosis of gingival tissues.