Key result
Dietary sodium loading increased extracellular vesicle surface antigens associated with vascular inflammation and platelet activation, which altered endothelial cell signaling in vitro.
Why the study?
High sodium consumption is linked to endothelial dysfunction, hypertension, and mortality, but whether circulating extracellular vesicles mediate these vascular and immune changes remained unclear.
Does dietary sodium modulation alter circulating extracellular vesicles and their effects on endothelial cells in human subjects?
Does dietary sodium modulation alter circulating extracellular vesicles and their effects on endothelial cells in human subjects?
High dietary sodium alters circulating extracellular vesicles, promoting a pro-inflammatory and pro-coagulant profile that directly impairs endothelial cell function.
High sodium may promote pro-inflammatory EVs impairing endothelial function; hypothesis-generating for salt's vascular effects beyond BP.
BACKGROUND: Sodium is involved in osmoregulation, fluid balance, and immune system function. High sodium (HS) consumption is linked to endothelial dysfunction, hypertension, and mortality. Extracellular vesicles (EVs), nano-sized particles reflecting cellular status, could link dietary sodium to vascular and immune changes. This study aimed to characterize circulating EVs and assess their functional role on endothelial cells after dietary sodium modulation. METHODS: Fifty subjects underwent 2 dietary sodium interventions, each lasting 5 to 7 days: sodium-restriction (10–40 mmol/d, 0.23–0.92 g/d) followed by sodium-loading (intake above 180 mmol/d, 4.14 g/d). Serum EVs were isolated after each phase and analyzed using a flow cytometry bead-based platform. Bioinformatics identified intracellular targets of EV surface antigens upregulated after the HS diet. Human microvascular endothelial cells were used to assess EV effects in vitro. RESULTS: In matched comparison, after HS-diet, EVs exhibited increased levels of CD14-CD25-CD40 (immune system markers), CD29-CD42-CD62P (coagulation and platelet activation markers), and CD31 (endothelial marker). Among targets identified by signaling network analysis, the incubation of human microvascular endothelial cells with patient-derived EVs after HS-diet resulted in decreased expression of AKT1 , increased expression of MAPK3 , and levels of active RhoA. It also resulted in increased expression of ICAM1 , number of ICAM-1 (Intercellular adhesion molecule-1) positive human microvascular endothelial cells, and nitric oxide levels. CONCLUSIONS: Dietary sodium modulates the expression of EV surface antigens associated with vascular inflammation, platelet activation, and endothelial function. Circulating EVs may mediate the effects of HS condition by interacting with endothelial cells, through multiple pathways, including RhoA activation and increased ICAM-1 expression.
No takes yet. Share an insight, caveat, or question.
Burrello et al. (2025) studied this question. Dietary sodium loading vs. Dietary sodium restriction was evaluated on Circulating extracellular vesicle surface antigens and functional effects on endothelial cells. Dietary sodium loading increased extracellular vesicle surface antigens associated with vascular inflammation and platelet activation, which altered endothelial cell signaling in vitro.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: