J Dent Res:NOD2基因缺陷与侵袭性牙周炎的联系

2017-07-20 MedSci MedSci原创

侵袭性牙周炎(AgP)会导致牙槽骨的快速破坏以及牙齿的早期缺失,然而其发病机制还不完全清楚。为了探索AgP的遗传风险因素,研究者进行了全基因组单核苷酸多态性的基因分型研究,以此来确定血缘同一的基因图谱以及鉴别32个不同的后补基因位点,随后分析2个家族谱系AgP患者的整个外显子序列,包含一个家庭中的3个病例和1个对照以及另一个家庭中同胞兄弟的2个病例。

侵袭性牙周炎(AgP)会导致牙槽骨的快速破坏以及牙齿的早期缺失,然而其发病机制还不完全清楚。为了探索AgP的遗传风险因素,研究者进行了全基因组单核苷酸多态性的基因分型研究,以此来确定血缘同一的基因图谱以及鉴别32个不同的后补基因位点,随后分析2个家族谱系AgP患者的整个外显子序列,包含一个家庭中的3个病例和1个对照以及另一个家庭中同胞兄弟的2个病例。

结果显示,通过不同变量的筛选过滤和靶向Sanger序列分析,研究者在NOD2基因位点16q12 上识别到2个错义突变p.Ala110Thr和p.Arg311Trp,它们可以编码核苷酸结合寡聚结构域蛋白2。另外,研究者还通过靶向序列分析检测了94位罹患遗传相关AgP患者的NOD2基因。结果发现,其中的2名患者也携带着p.Arg311Trp基因位点的变异。此外,研究者还额外发现3个此基因上的错义突变(p.His370Tyr, p.Arg459Cys和p.Ala868Thr)。这些突变体在亚洲人群中从未被发现过,也极其罕见(出现频率 <0.001)。NOD2作为胞内受体可以激活依赖于NFκB和MAPK的基因转录,对先天性免疫起到重要的作用。

结论:这些结果表明,NOD2是一个新发现的与AgP病因学相关基因。

原始出处:

Sudo T, Okada Y, et al. Association of NOD2 Mutations with Aggressive Periodontitis. J Dent Res. 2017 Jun 1:22034517715432. doi: 10.1177/0022034517715432.

本文系梅斯医学(MedSci)原创编译整理,转载需授权!

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    2017-07-22 sunyl07
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    2017-07-22 mxj1971616
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    2017-07-20 Chongyang Zhang

    签到学习了很多人

    0

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