[Effect of electroacupuncture on the expression of Iba-1 in spinal dorsal horn and hippocampus of chronic pain rats with knee osteoarthritis].

Objective: To observe the effect of electroacupuncture(EA) on pain-ralated behaviors, morphology of hippocampus, concentrations of inflammatory cytokines and expression of ionized calcium binding adapter molecule 1(Iba-1) in dorsal horn of the spinal cord and the hippocampus, and brain-derived neurotrophic factor (BDNF) in hippocampus of rats with knee osteoarthritis (KOA), so as to explore the mechanism of EA in improving chronic pain of KOA.

Methods: Forty SD rats were randomly divided into blank group, saline group, model group and EA group, with 10 rats in each group. Monosodium iodoacetate(MIA, 80 mg/mL, 50 μL) was injected into the left knee joint cavity of rats in the model group and EA group to establish the chronic pain model of KOA, while the same volume of normal saline was injected into the left knee joint cavity of rats in the saline group.

[Effects of electroacupuncture on pain behavior and pain-related factors in spinal cord dorsal horn and dorsal root ganglia of rats with knee osteoarthritis].

Objective: To observe the effect of electroacupuncture(EA) on the pain behavior and prostaglandin E2 (PGE2), calcitonin gene-related peptide (CGRP) and substance P (SP) in the spinal cord dorsal horn and dorsal root ganglia (DRG) of rats with knee osteoarthritis (KOA), so as to explore the mechanisms of EA underlying improvement of chronic pain in KOA rats.

Methods: Thirty-two female SD rats were randomly divided into blank group, control group, model group and EA group, with 8 rats in each group. Rats in the control group were injected with 50 μL of 0.