Aim To investigate the possible role of monocyte chemotactic protein-1(MCP-1,or CCL2)in spinal cord in rat model of bone cancer pain.Methods The bone cancer pain model was developed by inoculating Walker256 mammary gland carcinoma cells into the tibia medullary cavity.The change of Von-Frey threshold for mechanical allodynia was observed before and after inoculation.MCP-1 neutralizing antibody or control IgG was injected intrathecally(i.t.) during the period from 10th to 12th day.The effect of intrathecal i...