Another inflammatory biomarker that is meagerly examined in obesity is the Urokinase-type Plasminogen Activator Receptor (uPAR) [18], also known as CD87, which is a cell surface receptor for urokinase plasminogen activator (uPA), that belongs to the lymphatic antigen-6 superfamily [19]. Here, PLAUR is linked to obesity due to melanocortin 4 receptor deficiency.