4.8 Article

Exosomes-transferred LINC00668 Contributes to Thrombosis by Promoting NETs Formation in Inflammatory Bowel Disease

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ADVANCED SCIENCE
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WILEY
DOI: 10.1002/advs.202300560

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berberines; exosomes; inflammatory bowel diseases; LINC00668; neutrophil elastase; neutrophil extracellular traps; thrombus

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Epidemiological studies have found an association between inflammatory bowel disease (IBD) and increased risk of thrombosis, but the mechanism is unclear. This study demonstrates that IBD promotes the formation of neutrophil extracellular traps (NETs), which contributes to thrombus formation in IBD mice. Furthermore, exosomes derived from IBD mice's plasma induce arterial and venous thrombosis. The study also implicates LINC00668 in the release of NETs and suggests that targeting it could be a potential treatment for IBD-related thrombosis.
Epidemiological studies show an association between inflammatory bowel disease (IBD) and increased risk of thrombosis. However, how IBD influences thrombosis remains unknown. The current study shows that formation of neutrophil extracellular traps (NETs) significantly increased in the dextran sulfate sodium (DSS)-induced IBD mice, which in turn, contributes to thrombus formation in a NETs-dependent fashion. Furthermore, the exosomes isolated from the plasma of the IBD mice induce arterial and venous thrombosis in vivo. Importantly, proinflammatory factors-exposed intestinal epithelial cells (inflamed IECs) promote neutrophils to release NETs through their secreted exosomes. RNA sequencing revealed that LINC00668 is highly enriched in the inflamed IECs-derived exosomes. Mechanistically, LINC00668 facilitates the translocation of neutrophil elastase (NE) from the cytoplasmic granules to the nucleus via its interaction with NE in a sequence-specific manner, thereby inducing NETs release and thrombus formation. Importantly, berberine (BBR) suppresses the nuclear translocation of NE and subsequent NETs formation by inhibiting the interaction of LINC00668 with NE, thus exerting its antithrombotic effects. This study provides a novel pathobiological mechanism linking IBD and thrombosis by exosome-mediated NETs formation. Targeting LINC00668 can serve as a novel molecular treatment strategy to treat IBD-related thrombosis.

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