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. 2019 Apr 18;12:1287–1296. doi: 10.2147/JPR.S197168

Figure 5.

Figure 5

Schematic presentation of the mechanisms of TRPM8 blockade on cold hyperalgesia in the dorsal root ganglions of chronic constriction injury (CCI) rats. CCI increases expression of TRPM8, PKC, p-PKC and NF-κB p65 in the ipsilateral DRGs of CCI rats. Intrathecal injection of AMTB blocks TRPM8, and offset these effects induced by CCI. NF-κB inhibitor PDTC enhances AMTB’s anti-cold pain effect. These suggest that TRPM8 channels in DRGs participate in the pathogenesis of cold hyperalgesia in rats with neuropathic pain, which could be regulated by PKC and NF-κB signaling. Arrowheads=activate, short bars=inhibition.