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• W4311092844 abstract "Neuropathic pain represents a significant public health problem and its effective management remains a challenge. The present study is designed to evaluate the analgesic effect of the spirocyclopiperazinium salt compound DXL-A-24 in spinal nerve ligation (SNL) model, and further to explore the possible molecular mechanisms.SNL model was established on rats, and mechanical allodynia and thermal hyperalgesia were estimated with the von Frey and hot plate tests; the expression of CaMKIIα, CREB, JAK2, STAT3 and c-fos was determined by western blotting; the protein level of TNF-α was analysed by ELISA; the mRNA expression of TNF-α and c-fos was detected using qRT-PCR analysis and the receptor blocking test was used for target searching.Administration of DXL-A-24 (1, 0.5, 0.25 mg/kg, i.g.) obviously relieved SNL-induced mechanical allodynia and thermal hyperalgesia in rats (P < 0.01), with the percentage of pain threshold elevation (PTE%) was 103 %, 68 % and 47 %, respectively, in mechanical allodynia; the percentage of maximal possible effect (MPE%) was 56 %, 34 % and 21 %, respectively, in thermal hyperalgesia on day 7 after SNL. Pretreatment with peripheral α7 nicotinic or M4 muscarinic receptor antagonist, the effect of DXL-A-24 was completely blocked (P > 0.05). DXL-A-24 significantly reduced the upregulated pCaMKIIα, pCREB, pJAK2, pSTAT3 and TNF-α protein (P < 0.01), which could be blocked by α7 nicotinic receptor or M4 muscarinic receptor antagonist. In addition, administration of DXL-A-24 attenuated the mRNA and protein expression of c-fos and TNF-α mRNA in DRG of SNL rat. We did not observe significant acute toxicity and chronic hepatorenal impairment at effective dose and high dose.We report firstly that administration of DXL-A-24 displays obvious antineuropathic pain effects in SNL rats. The underlying mechanism may involve the reduction of the CaMKIIα/CREB and JAK2/STAT3 signalling pathways, and the suppression of TNF-α and c-fos expression, which may be mediated by activating peripheral α7 nicotinic and M4 muscarinic receptors. This study may provide a new perspective for developing new antineuralgic drug." @default.
• W4311092844 created "2022-12-23" @default.
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• W4311092844 date "2023-02-01" @default.
• W4311092844 modified "2023-10-15" @default.
• W4311092844 title "Effect and underlying mechanisms of spirocyclopiperazinium salt compound DXL-A-24 in rats following spinal nerve ligation" @default.
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• W4311092844 doi "https://doi.org/10.1016/j.brainres.2022.148187" @default.
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