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首页> 中文期刊> 《当代医学科学(英文)》 >Rapamycin Ameliorates Neuropathic Pain by Activating Autophagy and Inhibiting Interleukin-1β in the Rat Spinal Cord

Rapamycin Ameliorates Neuropathic Pain by Activating Autophagy and Inhibiting Interleukin-1β in the Rat Spinal Cord

         
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摘要

Autophagy acts as an important homoeostatic mechanism by degradation of cytosolic constituents and plays roles in many physiological processes. Recent studies demonstrated that autophagy can also regulate the production and secretion of the proinflammatory cytokine interleukin-1β(IL-1β), which plays a critical role in the development and maintenance of neuropathic pain. In the present study, the paw withdrawal threshold(PWT) and paw withdrawal latency(PWL) were significantly decreased after spinal nerve ligation(SNL), and the changes were accompanied by inhibited autophagy in the spinal microglia and increased mR NA and protein levels of IL-1β in the ipsilateral spinal cord. We then investigated the antinociceptive effect of rapamycin, a widely used autopahgy inducer, on SNL-induced neuropathic pain in rats and found that treatment with intrathecal rapamycin significantly attenuated the mechanical allodynia and thermal hyperalgesia. Moreover, rapamycin significantly enhanced autophagy in the spinal microglia, whereas it reduced the mR NA and protein levels of IL-1β in the ipsilateral spinal cord. Our results showed that rapamycin could ameliorate neuropathic pain by activating autophagy and inhibiting IL-1β in the spinal cord.

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