CCL2 and metabolic disease: Intercellular adhesion molecule-1 (ICAM-1), monocyte chemoattractant protein-1 (MCP-1), tumor necrosis factor-α (TNF-α), and plasminogen activator inhibitor-1 (PAI-1) are potent biological markers for the development of inflammatory and metabolic diseases which may include PCOS [6–8].