Insights into the blood, gut, and oral microbiomes in Chinese patients with myocardial infarction: a case-control study

作者：Ikram Khan, Imran Khan, Ping Xie, Xiaohui Yu, Shengnan Lei, Tianzhu Song, Zhiqiang Li, Xiaodong Xie · 发表于：BMC Microbiology · 年份：2025 · DOI：10.1186/s12866-025-03878-9 · 被引用次数：5 · 研究领域：Gut microbiota and health、Oral microbiology and periodontitis research、Probiotics and Fermented Foods

BACKGROUND: Emerging evidence suggests that changes in the blood microbes might be associated with cardiovascular disease, especially myocardial infarction (MI). However, some researchers are questioning whether a true "blood microbiome" actually exists. They hypothesized that these microbes may translocate into the bloodstream from the gut or oral cavities. To test this hypothesis, we analyzed the microbial composition, diversity, and potential role in disease progression by comparing blood, gut, and oral microbiota profiles in a cohort of MI patients and healthy controls. METHODS: In this study, 144 samples, including blood, fecal, and saliva, were collected from twenty-four myocardial infarction patients and twenty-four healthy controls. These samples were analyzed using 16 S rRNA sequencing to characterize the microbial profiles across the three distinct microbial compartments. Differential analyses were conducted to find key differential microbiota for MI. Spearman's rank correlation analysis was used to study the association between microbiota and clinical indicators. RESULTS: Our findings revealed striking microbial shifts across blood, gut, and oral compartments in MI patients compared to healthy controls. In the blood, we observed significant enrichment of the phyla Armatimonadota and Caldatribacteriota, alongside the genera Bacillus, Pedobacter, and Odoribacter. The gut microbiota of MI patients showed a notable increase in the phyla Proteobacteria, Verrucomicrobiot...