Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz

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Gewählte Publikation:

SHR Neuro Krebs Kardio Lipid Stoffw Microb

Boswijk, E; Franssen, R; Vijgen, GHEJ; Wierts, R; van Der Pol, JAJ; Mingels, AMA; Cornips, EMJ; Majoie, MHJM; Lichtenbelt, WDV; Mottaghy, FM; Wildberger, JE; Bucerius, J.
Short-term discontinuation of vagal nerve stimulation alters ¹⁸F-FDG blood pool activity: an exploratory interventional study in epilepsy patients
EJNMMI RES. 2019; 9(1): 101 Doi: 10.1186/s13550-019-0567-9
Web of Science PubMed FullText FullText_MUG

Führende Autor*innen der Med Uni Graz: Bucerius Jan Alexander
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Abstract:: Background Vagus nerve activation impacts inflammation. Therefore, we hypothesized that vagal nerve stimulation (VNS) influenced arterial wall inflammation as measured by F-18-FDG uptake. Results Ten patients with left-sided VNS for refractory epilepsy were studied during stimulation (VNS-on) and in the hours after stimulation was switched off (VNS-off). In nine patients, F-18-FDG uptake was measured in the right carotid artery, aorta, bone marrow, spleen, and adipose tissue. Target-to-background ratios (TBRs) were calculated to normalize the respective standardized uptake values (SUVs) for venous blood pool activity. Median values are shown with interquartile range and compared using the Wilcoxon signed-rank test. Arterial SUVs tended to be higher during VNS-off than VNS-on [SUVmax all vessels 1.8 (1.5-2.2) vs. 1.7 (1.2-2.0), p = 0.051]. However, a larger difference was found for the venous blood pool at this time point, reaching statistical significance in the vena cava superior [meanSUVmean 1.3 (1.1-1.4) vs. 1.0 (0.8-1.1); p = 0.011], resulting in non-significant lower arterial TBRs during VNS-off than VNS-on. Differences in the remaining tissues were not significant. Insulin levels increased after VNS was switched off [55.0 pmol/L (45.9-96.8) vs. 48.1 pmol/L (36.9-61.8); p = 0.047]. The concurrent increase in glucose levels was not statistically significant [4.8 mmol/L (4.7-5.3) vs. 4.6 mmol/L (4.5-5.2); p = 0.075]. Conclusions Short-term discontinuation of VNS did not show a consistent change in arterial wall F-18-FDG-uptake. However, VNS did alter insulin and F-18-FDG blood levels, possibly as a result of sympathetic activation.
Find related publications in this database (Keywords): Vagal nerve stimulation (VNS); Inflammation; Atherosclerosis; Positron emission tomography (PET); Metabolism