Effect of down-regulation of GAT-1 on analgesic action of oxysophoridine Influence of Tongxie prescription on CRF expression in spinal cord and brain of hypersensitive viscera rats Effects of Shenwu capsule and its component tetrahydroxystilbene glucoside on expression of neurotrophic factors in lumbar spinal cord of aged rats Analgesic sites of total alkaloids in Papaver nudicaule Curcumin down-regulates CX3CR1 expression in spinal cord dorsal horn and DRG in neuropathic pain rats