Article Impact Level: HIGH Data Quality: STRONG Summary of Cell Reports Medicine, 6(8), 102260. https://doi.org/10.1016/j.xcrm.2025.102260 Dr. Xiaoshan Huang et al.
Points
- Palmitic acid has a direct procoagulant effect by inhibiting the crucial anticoagulant activated protein C while concurrently enhancing the activation of platelets to promote clot formation.
- The gut microbe Bacteroides thetaiotaomicron is capable of producing its own palmitic acid, which can enter the host’s circulation to affect coagulation processes directly.
- Consuming a high-fat diet promotes explicitly the colonization and growth of Bacteroides thetaiotaomicron, thereby increasing circulating levels of prothrombotic palmitic acid in the host.
- Transplanting this bacterium into mice elevated their plasma palmitic acid and triggered a hypercoagulable state, confirming a direct causal role in increasing host thrombosis risk.
- The dietary flavonoid hesperidin effectively blocks the harmful molecular interaction between palmitic acid and activated protein C, presenting a novel therapeutic strategy to prevent thrombosis.
Summary
A new study has elucidated a novel mechanistic link between gut microbiota, diet, and the risk of thrombosis in cardiovascular disease (CVD). Researchers observed that patients with CVD had significantly elevated circulating palmitic acid (PA) and hypercoagulable states compared to healthy controls. This clinical finding was strongly associated with gut dysbiosis, specifically a significantly higher relative abundance of Bacteroides thetaiotaomicron (BT), which showed an approximate 2.18-fold increase in the CVD patient group. The investigation establishes a direct correlation between this specific gut bacterium, high levels of a prothrombotic fatty acid, and the pathological state seen in CVD.
The study identified a dual procoagulant mechanism for PA, which directly inhibits the key endogenous anticoagulant activated protein C (APC) while simultaneously enhancing platelet activation. Mechanistic insight was provided by the discovery that BT strains can synthesize PA in vitro. Subsequent animal models confirmed this causal link; mice colonized with BT, without alterations to host lipogenesis, exhibited elevated plasma PA levels and a corresponding hypercoagulable state. This demonstrates that gut microbiota can be a significant source of circulating PA, directly modulating host thrombosis risk independent of endogenous synthesis or immediate dietary intake.
Furthermore, the research underscores the pivotal role of diet in modulating this pathophysiological axis. A high-fat diet was shown to promote the colonization of BT, which in turn increased plasma PA and induced hypercoagulation in the host. As a potential therapeutic intervention, the dietary flavonoid hesperidin was identified as a potent inhibitor of the PA-APC interaction. By blocking this specific molecular binding, hesperidin effectively prevented the hypercoagulation induced by both direct PA administration and BT transplantation in mouse models. These findings delineate a high-fat diet–gut microbiota–PA axis as a novel contributor to CVD risk.
Link to the article: https://www.sciencedirect.com/science/article/pii/S2666379125003337
References Huang, X., Tang, X., He, Q., Tadese, D. A., Cao, K., Gao, J., Xu, Q., Cheng, R., Lu, Q., Chen, Y., Yang, M., Du, Y., Mwangi, J., Ni, H., & Lai, R. (2025). High-fat diet increases circulating palmitic acid produced by gut Bacteroides thetaiotaomicron to promote thrombosis. Cell Reports Medicine, 6(8), 102260. https://doi.org/10.1016/j.xcrm.2025.102260
