CCL2 and obesity due to melanocortin 4 receptor deficiency: Adipose tissue functions as an active endocrineand immune organ,regulating inflammation through the production of fatty acid-bindingproteins, adipokines, leptin, and lipid droplet-associated proteins.Obesity is often accompanied by chronic inflammation, with adiposetissue secreting various pro-inflammatory factors such as MCP-1, TNF-α,IL-1β, and IL-6.