J Periodontal Res: :牙龈卟啉单胞菌牙龈素对脂蛋白的影响

2018-07-26 MedSci MedSci原创

一些研究表明牙周炎与心血管疾病(CVD)之间存在关联。动脉粥样硬化是CVD的主要原因,并且动脉粥样硬化发展中的关键是动脉壁内脂蛋白的积累。细菌是牙周炎的主要病原体,牙龈卟啉单胞菌是该病的主要致病菌。一些研究支持改良低密度脂蛋白(LDL)在动脉粥样硬化形成中的作用;然而,诱导这种变化的致病刺激和发生这种变化的机制尚不清楚。该研究旨在鉴定由牙周病细菌牙龈卟啉单胞菌诱导的血浆脂蛋白的体外改变。

一些研究表明牙周炎与心血管疾病(CVD)之间存在关联。动脉粥样硬化是CVD的主要原因,并且动脉粥样硬化发展中的关键是动脉壁内脂蛋白的积累。细菌是牙周炎的主要病原体,牙龈卟啉单胞菌是该病的主要致病菌。一些研究支持改良低密度脂蛋白(LDL)在动脉粥样硬化形成中的作用;然而,诱导这种变化的致病刺激和发生这种变化的机制尚不清楚。该研究旨在鉴定由牙周病细菌牙龈卟啉单胞菌诱导的血浆脂蛋白的体外改变。

通过密度/梯度 - 超速离心从野生型和gingipain突变体(缺乏Rgp-或Kgp gingipains)牙龈卟啉单胞菌处理的全血中分离血浆脂蛋白,并使用二维凝胶电泳然后基质辅助激光解吸电离质谱法进行研究。分别通过硫代巴比妥酸反应物质和抗氧化剂测定试剂盒测定牙龈卟啉单胞菌诱导的脂质过氧化和抗氧化水平,并使用荧光测定法测量活性氧(ROS)和聚集。

结果:牙龈卟啉单胞菌对脂蛋白发挥显着的蛋白水解作用。 Rgp gingipains负责在LDL中产生2个apoE片段以及2个apoB-100片段,并且Kgp gingipain在高密度脂蛋白中产生未鉴定的片段。牙龈卟啉单胞菌及其不同的gingipain变体诱导ROS并消耗抗氧化剂。 Rgp和Kgp gingipain都参与诱导脂质过氧化。

牙龈卟啉单胞菌有可能改变血液中脂蛋白的表达,这可能是牙周炎和心血管疾病之间的关键联系。

原始出处:

J. Lonn, et al. Lipoprotein modifications by gingipains of Porphyromonas gingivalis. Journal of Periodontal Research. 2018 June. doi: 10.1111/jre.12527

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    2019-03-29 wincls
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    2019-02-27 feather89
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