To date, the increased level of serum MCP‐1 correlated with different markers of type 2 diabetes and obesity,13 and CCR2 expression on monocytes was found to be higher in diabetic patients.14 Circulating levels of MCP‐1 are higher in patients with acute myocardial infarction, ischaemic stroke and unstable angina, but not in patients with stable angina, suggesting the involvement of MCP‐1 in plaque vulnerability.15, 16. The gene discussed is CCL2; the disease is obesity due to melanocortin 4 receptor deficiency.