Abstract:
BACKGROUND:Post-infarction cardiovascular remodeling and heart failure are the leading cause of myocardial infarction (MI)-driven death during the past decades. Experimental observations have involved intestinal microbiota in the susceptibility to MI in mice; however, in humans, identifying whether translocation of gut bacteria to systemic circulation contributes to cardiovascular events post-MI remains a major challenge. RESULTS:Here, we carried out a metagenomic analysis to characterize the systemic bacteria in a cohort of 49 healthy control individuals, 50 stable coronary heart disease (CHD) subjects, and 100 ST-segment elevation myocardial infarction (STEMI) patients. We report for the first time higher microbial richness and diversity in the systemic microbiome of STEMI patients. More than 12% of post-STEMI blood bacteria were dominated by intestinal microbiota (Lactobacillus, Bacteroides, and Streptococcus). The significantly increased product of gut bacterial translocation (LPS and D-lactate) was correlated with systemic inflammation and predicted adverse cardiovascular events. Following experimental MI, compromised left ventricle (LV) function and intestinal hypoperfusion drove gut permeability elevation through tight junction protein suppression and intestinal mucosal injury. Upon abrogation of gut bacterial translocation by antibiotic treatment, both systemic inflammation and cardiomyocyte injury in MI mice were alleviated. CONCLUSIONS:Our results provide the first evidence that cardiovascular outcomes post-MI are driven by intestinal microbiota translocation into systemic circulation. New therapeutic strategies targeting to protect the gut barrier and eliminate gut bacteria translocation may reduce or even prevent cardiovascular events post-MI.
journal_name
Microbiomejournal_title
Microbiomeauthors
Zhou X,Li J,Guo J,Geng B,Ji W,Zhao Q,Li J,Liu X,Liu J,Guo Z,Cai W,Ma Y,Ren D,Miao J,Chen S,Zhang Z,Chen J,Zhong J,Liu W,Zou M,Li Y,Cai Jdoi
10.1186/s40168-018-0441-4subject
Has Abstractpub_date
2018-04-03 00:00:00pages
66issue
1issn
2049-2618pii
10.1186/s40168-018-0441-4journal_volume
6pub_type
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