实用医学杂志 ›› 2025, Vol. 41 ›› Issue (24): 3958-3968.doi: 10.3969/j.issn.1006-5725.2025.24.021

• 调查研究 • 上一篇    

孟德尔随机化研究口腔菌群和循环代谢物在胆道恶性肿瘤中的作用

胡乔斌1,戴志达2,张智翔1,郭子茵1,刘祎伊1,张春雷3,李经华4()   

  1. 1.暨南大学口腔医学院 (广东 广州 510632 )
    2.中山大学光华口腔医学院附属口腔医院 (广东 广州 510055 )
    3.暨南大学附属第一医院口腔科 (广东 广州 510630 )
    4.广州中医药大学第三临床医学院 (广东 广州 510378 )
  • 收稿日期:2025-07-23 出版日期:2025-12-25 发布日期:2025-12-25
  • 通讯作者: 李经华 E-mail:ljh@gzucm.edu.cn
  • 基金资助:
    广州市科技局基础研究计划市院联合资助项目(2025A03J4171)

Mendelian randomization analysis reveals causal associations of oral microbiome and circulating metabolites with biliary tract cancer

Qiaobin HU1,Zhida DAI2,Zhixiang ZHANG1,Ziyin GUO1,Yiyi LIU1,Chunlei ZHANG3,Jinghua. LI4()   

  1. *.School of Stomatology,Jinan University,Guangzhou 510632,Guangdong,China
  • Received:2025-07-23 Online:2025-12-25 Published:2025-12-25
  • Contact: Jinghua. LI E-mail:ljh@gzucm.edu.cn

摘要:

目的 通过孟德尔随机化(Mendelian randomization, MR)和中介分析,系统评估口腔菌群、循环代谢物与胆道恶性肿瘤(biliary tract cancer, BTC)的因果关系,并揭示代谢物的中介作用。 方法 数据源自中国国家基因库生命大数据平台和日本生物样本库,采用双样本双向MR与中介分析方法,以逆方差加权法为主进行因果推断,辅以贝叶斯加权MR、连锁不平衡评分回归、反向MR分析及敏感性检验。 结果 观察到13种唾液微生物(如Prevotella seregens mgs 811P = 0.013,OR = 2.387)和19种舌背微生物(如Eikenella corrodens mgs 3538P = 0.015,OR = 2.635)与BTC风险显著相关,同时发现直接胆红素(OR = 1.768)和铅(OR = 2.448)为风险因子,而锰(OR = 0.509)和瓜氨酸(OR = 0.440)为保护因子。中介分析显示,3种代谢物分别介导5种细菌对BTC产生间接影响,最高介导比例达10.3%。 结论 本研究表明口腔菌群、循环代谢物和BTC之间存在因果关联,为基于微生物-代谢轴的精准防治策略提供了理论依据。

关键词: 胆道恶性肿瘤, 口腔菌群, 循环代谢物, 孟德尔随机化

Abstract:

Objective To systematically evaluate the causal relationships between oral microbiota, circulating metabolites, and biliary tract cancer (BTC) using Mendelian randomization (MR) and mediation analysis, and to elucidate the mediatory role of metabolites. Methods Using two-sample bidirectional Mendelian randomization and mediation analysis, we analyzed data from the China National GeneBank Life Data Platform and the BioBank Japan. Primary causal inference was based on inverse variance weighting (IVW), supplemented by Bayesian weighted MR, linkage disequilibrium score regression, reverse MR, and sensitivity analyses. Results Thirteen salivary microbial taxa (e.g., Prevotella seregens mgs 811P = 0.013, OR = 2.387) and nineteen tongue dorsum microbial taxa (e.g., Eikenella corrodens mgs 3538P = 0.015, OR = 2.635) demonstrated significant associations with BTC risk. Concurrently, direct bilirubin (OR = 1.768) and lead (OR = 2.448) were identified as risk factors, whereas manganese (OR = 0.509) and citrulline (OR = 0.440) were protective factors. Mediation analysis revealed that three blood metabolites indirectly mediated the effects of five bacterial taxa on BTC, with a maximum mediation proportion reaching 10.3%. Conclusion This study demonstrates causal associations among oral microbiota, circulating metabolites, and BTC, thereby providing a theoretical foundation for precision prevention and treatment strategies rooted in the microbiota-metabolite axis.

Key words: biliary tract cancer, oral microbiota, circulating metabolites, Mendelian randomization

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