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Infect Immun:牙周致病菌可导致动脉粥样硬化的发生

2015-09-14 MedSci MedSci原创

Infect Immun:牙周致病菌可导致动脉粥样硬化的发生牙周炎是心脏病发生的一个危险因素,目前有研究表明,牙周致病菌可引起机体基因表达的改变,促进主动脉平滑肌细胞炎症及动脉粥样硬化的发生,该研究成果发表于《感染与免疫杂志》。牙龈卟啉单胞菌,牙周的一个主要致病菌,目前已在心脏病患者的动脉斑块中发现。来自瑞典厄勒布鲁大学卫生科学学院临床医学系的研究人员进行了两项动物实验,发现牙龈卟啉单胞菌可引起并

牙周炎是心脏病发生的一个危险因素,目前有研究表明,牙周致病菌可引起机体基因表达的改变,促进主动脉平滑肌细胞炎症及动脉粥样硬化的发生,该研究成果发表于《感染与免疫杂志》。

牙龈卟啉单胞菌是牙周的一个主要致病菌,目前已在心脏病患者的动脉斑块中发现。来自瑞典厄勒布鲁大学卫生科学学院临床医学系的研究人员进行了两项动物实验,发现牙龈卟啉单胞菌可引起并加速冠状动脉及主动脉粥样硬化斑块的形成。

研究人员培养了人主动脉平滑肌细胞,并用牙龈卟啉单胞菌感染这些细胞。结果发现,牙龈卟啉单胞菌所产生的毒力因子——牙龈蛋白酶(Gingipains),可增加平滑肌细胞内促炎性血管生成素2的表达抑制促炎性血管生成素1的表达。而炎症在动脉粥样硬化的发展过程中扮演了重要的角色。

“刺激主动脉平滑肌细胞可产生低水平的血管生成素2,但是刺激野生型牙龈卟啉单胞菌时则可显著增加主动脉平滑肌细胞内基因表达的血管生成素2的水平,”研究人员写道。

“血管生成素2可直接提高主动脉平滑肌细胞的迁移,”该研究第一作者Boxi Zhang说道,“平滑肌细胞的迁移参与了动脉粥样硬化的发病机制。”

与牙龈蛋白酶一样,肿瘤坏死因子(TNF),炎性细胞因子以及心血管发生的危险因子也可通过两种血管生成素诱导并促进动脉粥样硬化的发生。然而,研究人员发现,牙龈素可独立于TNF之外诱导并促进动脉粥样硬化的发生。

“我们的研究阐明了牙周炎与心血管疾病之间的关联,”Zhang说道,“我们的目标是寻找可帮助我们诊断并治疗牙周炎及心血管疾病的生物标志物。”

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    2016-09-13 1e10c84am36(暂无匿称)

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    2015-09-16 cooco

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J Periodontol:血清25(OH)D不会引起牙周袋的形成及牙龈出血维生素D除了对骨代谢有影响,还具有免疫调节的属性。然而,到目前为止,血清25(OH)D是否对牙周组织会产生一些有利的影响,我们还不是很清楚。因此,本研究的目的就是通过测定牙周袋和牙龈出血来探讨25(OH)D的血清水平是否与牙周状况有关。 本研究基于芬兰2000年的健康调查,纳入1262名不吸烟,非糖尿病群体。通过测量每名研

Dentistry:速来围观,治疗牙龈疾病可以缓解前列腺炎的症状

Science Daily:速来围观,治疗牙龈疾病可以缓解前列腺炎的症状据Science Daily报道,来自克利夫兰市凯斯西储大学的研究表明,治疗牙龈疾病可能有助于减少前列腺炎的症状。此前已有研究发现牙龈疾病和前列腺炎之间据有关联。“这项研究表明,如果我们治疗牙龈疾病,可以改善前列腺炎的症状,提高患者的生活质量。”研究的通讯作者、克利夫兰市凯斯西储大学牙周病学教授Nabil Bissada博士说

J Dent Res:从缺失牙齿预测心血管疾病,糖尿病以及死亡

J Dent Res:从缺失牙齿预测心血管疾病,糖尿病以及死亡的发生 牙周炎,是中老年人牙齿丧失的主要原因,同时也是动脉粥样硬化性心血管疾病的危险因素。本研究的目的是为了探究牙齿丧失的数目是否可预测心血管疾病(CVDs),糖尿病以及死亡的发生。国家 FINRISK1997研究是基于8446名人群的调查研究以及13年的随访研究。基线时期记录研究对象的牙齿状况,并通过国家登记册获得人群CVD

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