ArticleCell communication and signaling : CCS2025
Klebsiella pneumoniae-derived extracellular vesicles impair endothelial function by inhibiting SIRT1.
Article in Cell communication and signaling : CCS, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Gut microbiota-derived extracellular vesicles: bridging microbial-host crosstalk in metabolic disorders.Cell communication and signaling : CCS · 2026Review
- Vascular-Apoptotic Crosstalk in Alzheimer's Disease: The Possible Role of Vascular Senescence in Blood-Brain Barrier Dysfunction.European journal of neurology · 2026Article
- Extracellular Vesicles as Drivers of Lung Endothelial Dysfunction in ARDS: Mechanisms and Therapeutic Opportunities.Comprehensive Physiology · 2026Review
- Antibiotics modulate Escherichia coli-derived bacterial extracellular vesicle production and their upregulation of ICAM-1 in human endothelial cells.Biology open · 2026Article
- Extracellular Vesicles in the Heart-Organ Axis: From Inter-Organ Communication to Precision Nanomedicine for Heart Diseases.International journal of nanomedicine · 2026Review
- Bacterial extracellular vesicles in the initiation, progression and treatment of atherosclerosis.Gut microbes · 2025Review
- The Role of Hepatic SIRT1: From Metabolic Regulation to Immune Modulation and Multi-target Therapeutic Strategies.Journal of clinical and translational hepatology · 2025Review
- Bacterial Extracellular Vesicles: Emerging Regulators in the Gut-Organ Axis and Prospective Biomedical Applications.Current microbiology · 2025Review
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Authors and funding
14 authors.
Funding
Abstract
backgroundThe potential role of Klebsiella pneumoniae (K.pn) in hypertension development has been emphasized, although the specific mechanisms have not been well understood. Bacterial extracellular vesicles (BEVs) released by Gram-negative bacteria modulate host cell functions by delivering bacterial components to host cells. Endothelial dysfunction is an important early event in the pathogenesis of hypertension, yet the impact of K.pn-secreted EVs (K.pn EVs) on endothelial function remains unclear. This study aimed to investigate the effects of K.pn EVs on endothelial function and to elucidate the underlying mechanisms.
methodsK.pn EVs were purified from the bacterial suspension using ultracentrifugation and characterized by transmission electron microscopy nanoparticle tracking analysis, and EV marker expression. Endothelium-dependent relaxation was measured using a wire myograph after in vivo or ex vivo treatment with K.pn EVs. Superoxide anion production was measured by confocal microscopy and HUVEC senescence was assessed by SA-β-gal activity. SIRT1 overexpression or activator was utilized to investigate the underlying mechanisms.
resultsOur data showed that K.pn significantly impaired acetylcholine-induced endothelium-dependent relaxation and increased superoxide anion production in endothelial cells in vivo. Similarly, in vivo and ex vivo studies showed that K.pn EVs caused significant endothelial dysfunction, endothelial provocation, and increased blood pressure. Further examination revealed that K.pn EVs reduced the levels of SIRT1 and p-eNOS and increased the levels of NOX2, COX-2, ET-1, and p53 in endothelial cells. Notably, overexpression or activation of SIRT1 attenuated the adverse effects and protein changes induced by K.pn EVs on endothelial cells.
conclusionThis study reveals a novel role of K.pn EVs in endothelial dysfunction and dissects the relevant mechanism involved in this process, which will help to establish a comprehensive understanding of K.pn EVs in endothelial dysfunction and hypertension from a new scope.
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