CXCL1 and metabolic syndrome: The postprandial inhibition of pro-inflammatory gene expression induced by the breakfast with polyphenol-enriched VOO when compared to VOO-based breakfast with low polyphenol content was correlated with a lower plasmatic levels of lipopolysaccharides (LPS) and in turn to lower NF-kB activation, with a reduction in IL-6, IL-1β, and CXCL-1 (C-X-C Motif Chemokine Ligand 1) expression in PBMCs from MetS patients [94].