CCL2 and aneurysm: Three cytokines, namely, interleukin-15 (IL-15), monocyte chemoattractant protein-1 (MCP-1), and tumor necrosis factors-β (TNF-β) were significantly increased in intermediate-high risk aneurysms compared with low risk aneurysms (P < 0.05, |log2 fold change| > 2) (Figure 2).