Figure 4: Plasma levels of selected adipokines: C-peptide (a), plasminogen activator inhibitor-1 (b), leptin (d), glucose-dependent insulinotropic polypeptide (e), ghrelin (f), and ATP levels in platelet-enriched plasma (c), in the groups of obese patients with metabolic syndrome (OB w.MetS, ) and without metabolic syndrome (OB w.o.MetS, ), and control healthy subjects (CTR, ). Values are represented as mean (□), standard error of the mean (upper and lower limits of the box), and 1.96 × standard error (upper and lower whiskers). Intergroup significant differences () are indicated in each panel. Abbreviations: PAI-1 (plasminogen activator inhibitor-1); PRP (platelet-rich plasma); and GIP (glucose-dependent insulinotropic polypeptide). Techniques: multiplexed Bio-Plex Suspension Array System (a-b, d–f), bioluminescence (c).