• Lei Shi, Hong-Hong Zhang, Ying Xiao, Ji Hu, and Guang-Yin Xu.
• Department of Endocrinology, the Second Affiliated Hospital, Soochow University, Suzhou, China.
• CNS Neurosci Ther. 2013 Feb 1; 19 (2): 83-90.

AimsTo investigate whether electroacupuncture (EA) produced analgesic effect and whether nuclear factor kappa B (NF-κB) and cystathionine β synthase (CBS) involved in EA-mediated analgesia in painful diabetic neuropathy in rats.MethodsDiabetes was induced by an intraperitoneal injection of streptozotocin (STZ) in adult female rats. Mechanical pain threshold was measured by von Frey filaments. EA was applied at acupoint Zu-San-Li (ST-36) in both hindlimbs. Western blot analysis was employed to detect changes in protein levels of NF-κB and CBS in spinal dorsal root ganglion (DRGs).ResultsMechanical allodynia was developed 2 weeks after STZ injection and lasted for another 4 weeks. STZ injection significantly enhanced expression of p65 and CBS in lumbar L4-6 DRGs when compared with age-matched controls. EA markedly attenuated mechanical allodynia. Importantly, EA treatment remarkably inhibited p65 and CBS expression in DRGs. Additionally, intrathecal injection of the p65 antagonist pyrrolidine dithiocarbamate attenuated mechanical allodynia and markedly inhibited CBS expression in DRGs in STZ rats.ConclusionsThese data indicate that EA produced an analgesic effect, which might be mediated at least in a part by inhibition of NF-κB signaling pathway in primary sensory neurons in rats with diabetes.© 2012 Blackwell Publishing Ltd.

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