ArticleNeuroimmunomodulation2026
Autonomic-Immunoinflammatory-Cardiac Interplay during Lipopolysaccharide-Induced Systemic Inflammation.
Article in Neuroimmunomodulation, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
introductionLipopolysaccharide (LPS) triggers a complex autonomic-immunoinflammatory-cardiac interplay involving time-dependent dynamics, cytokine pleiotropy, and context-dependent autonomic responses that complicate interpretation. Therefore, the study aimed to evaluate autonomic alterations, cardiac electrical alterations, and the Vagal Neuroimmunomodulation Index (VNIM), and to assess systemic and cardiac inflammatory markers following LPS-induced endotoxemia in a preclinical rat model.
methodsMale Wistar rats were divided into two groups: control and LPS-treated (n = 5 per group). Endotoxemia was induced by intraperitoneal administration of LPS (3 mg/kg), and lead-II electrocardiogram (ECG) signals were recorded after 24 h for heart rate variability (HRV) analysis and ventricular repolarization/morphological analysis (QT, JT, Tpeak-Tend, ST segment, and Q waves). Biochemical analysis, including inflammatory markers, was quantified in plasma and cardiac tissue. The VNIM was obtained as the ratio of vagally mediated HRV to the inflammatory markers.
resultsLPS administration resulted in a significant increase in core temperature, tachycardia, and marked reductions in HRV indices, indicating impaired autonomic regulation. LPS-treated rats exhibited significantly higher levels of plasma C-reactive protein, heart IL-6, and leukocyte counts. ECG analysis demonstrated prolonged QT, JT, and Tpeak-Tend intervals, alongside ST-segment depression and Q-wave inversion, indicative of electrical remodeling and myocardial damage. The VNIM index was significantly reduced across all inflammatory markers, demonstrating a breakdown of parasympathetic regulation over immune activation. Correlation analyses revealed significant associations among autonomic, immunoinflammatory, and cardiac parameters.
conclusionLPS-induced endotoxemia in rats leads to pronounced autonomic and inflammatory dysregulation, accompanied by distinct ECG abnormalities and reduced VNIM. The integration of HRV, cytokine, and ECG profiling provides valuable insight into the autonomic-inflammatory-cardiac interplay during systemic inflammation, supporting their utility in early diagnosis and monitoring of sepsis and related conditions.
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