在可卡因使用障碍的个体中表征口服至血液微生物DNA转位
Douglas Johnson1,2,3, Kamala P Sundararaj1, Suganya Subramanian4
1Department of Pharmacology and Immunology, Medical University of South Carolina, Charleston, 29425, USA.
bioRxiv : the preprint server for biology
|November 24, 2025
概括
可卡因使用障碍 (CUD) 与口腔细菌转移到血液中,导致炎症有关. 这种口腔血液屏障的破坏,而不是可卡因本身,可能会导致CUD患者的免疫问题.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 口腔健康 口腔健康
背景情况:
- 可卡因对肠道屏障和炎症的影响受到争论.
- 之前的研究表明可卡因使用者的潜在微生物转移和全身炎症.
- 口腔在可卡因相关炎症中的作用尚不清楚.
研究的目的:
- 调查口腔是否是可卡因使用障碍 (CUD) 患者微生物DNA转移的来源.
- 探索口腔微生物组变化,微生物转移和CUD中的免疫反应之间的关系.
主要方法:
- 横截面病例对照研究,比较CUD个体和对照.
- 配对的唾液和血液样本分析了微生物16S rRNA V4区域.
- 单细胞RNA测序 (scRNAseq) 用于周围血液单核细胞.
- 在体外实验中评估了可卡因对口腔细菌生长和免疫细胞激活的影响.
主要成果:
- 在CUD个体中,口腔微生物失生症与丰富的*Streptococcus*以及其他类型的枯竭.
- 血 *Streptococcus* 种类被丰富于CUD,并显示出转移的迹象.
- 可卡因在体外增强了S. parasanguinis的生长;这种物种诱导了促炎性细胞因子.
- scRNAseq在CUD中揭示了先天性免疫激活和T细胞功能受损.
结论:
- 这项研究是第一个在CUD中证明口腔微生物失生症和口腔到血液转位的研究.
- 一个受损的口腔至血液屏障,而不是可卡因直接,似乎驱动了CUD中的免疫干扰.
- 研究结果强调,口腔是可卡因相关炎症和健康并发症的关键因素.
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