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0-fold lower than that of NS-injected CCD rats (P http://www.selleckchem.com/products/SRT1720.html study. We further measured the P2X3 receptor immune response and mRNA expression in the SDH on day 14 after the operation. Our data showed that P2X3 receptor-immunopositive cells were enhanced in the SDH. P2X3 receptor protein expression in the SDH was also significantly up-regulated. Our results suggest that the over-expression of P2X3 receptors http://en.wikipedia.org/wiki/MERTK may play an important role in pathological processes after nerve injury induced by a CCD operation. Although neuropathic pain may be associated with the interaction http://www.selleckchem.com/products/Adrucil(Fluorouracil).html of a variety of algogenic substances and receptors in the SDH, determining the role of the P2X3 receptor in the primary nociceptive information transfer process will be helpful for understanding the peripheral network and the regulatory role of the primary sensorium on body function. Furthermore, our data showed that PGB alleviated the mechanical hypersensitivity in CCD rats and decreased the up-regulated expression of the P2X3 receptor in the SDH neurons, suggesting that PGB perhaps participates in adjusting pain conduction and the nerve repair process by inhibiting P2X3 expression in the SDH. Another report also indicated that PGB showed antinociceptive activity and reduced the up-regulated P2X3 subunit expression in the DRG in a mouse model of spinal nerve ligation (SNL)-induced neuropathic pain (Kiso et al., 2008). Similarly, the down-regulation of P2X3 subunits in the SDH in several types of rat models of neuropathic pain has been induced using nonpharmacological methods such as electroacupuncture and antisense oligonucleotides (Barclay et al., 2002; Yu et al., 2013). However, the expression of the P2X3 subunit in PGB-treated cell culture should be measured to elucidate whether PGB inhibits P2X3 subunit directly or through any signaling proteins. Studies of the relationship between PGB and P2X3 may be more convincing. Together, our CCD rat model of neuropathic pain may closely mimic some clinical features of disc herniation.