Results It was found that the NR1 expression in DRG and dorsal horn of L4-5 segment of the formalin group was significantly stronger than that in the normal saline group.

• 结果炎症组大鼠背根节中、小型细胞及脊髓背角的NR1表达较生理盐水组显著增加,表明福尔马林刺激导致的炎症痛及痛过敏可能是通过上调NR1受体的表达而实现的。