CCL2 and concussion: While this review suggests that TNF-α (35, 36, 61), IL-1RA (28, 30) and IL-10 (34, 53), in addition to IL-6 (29, 31, 35, 36) and MCP-1/CCL2 (33, 39) have the potential to predict the outcome of mTBI, this data is too limited to draw concrete conclusions about these associations.