The spirocyclopiperazinium salt compound LXM-15 alleviates chronic inflammatory and neuropathic pain in mice and rats

doi:10.5246/jcps.2019.06.036

Journal of Chinese Pharmaceutical Sciences ›› 2019, Vol. 28 ›› Issue (6): 371-380.DOI: 10.5246/jcps.2019.06.036

• Original articles • Next Articles

The spirocyclopiperazinium salt compound LXM-15 alleviates chronic inflammatory and neuropathic pain in mice and rats

Ning Li^1#, Yingying Liang^1#, Qi Sun², Yimin Jiang³, Runtao Li^2*, Jia Ye^1*

1. Department of Molecular and Cellular Pharmacology, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China
2. Department of Chemical Biology, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China
3. Department of Medical and Healthy Analysis Center, Peking University Health Science Center, Beijing 100191, China

Received:2019-03-24 Revised:2019-04-17 Online:2019-06-30 Published:2019-05-10
Contact: Tel.: +86-010-82802653; +86-010-82805954, E-mail: yejia@bjmu.edu.cn; lirt@bjmu.edu.cn
Supported by:
National Natural Science Foundation of China (Grant No. 81870876, 81470050).

Abstract

Abstract:

In the present study, we aimed to evaluate the effect of the spirocyclopiperazinium salt compound LXM-15 on chronic inflammatory pain and chronic neuropathic pain induced by complete Freund’s adjuvant (CFA) or chronic constriction injury (CCI) in mice and rats. The results showed that administration with LXM-15 significantly reduced paw edema and ankle swelling and increased the mechanical withdrawal threshold and paw withdrawal latency after CFA injection in mice. LXM-15 significantly alleviated the mechanical allodynia and thermal hyperalgesia in CCI rats. The effect was abolished by pretreatment with hexamethonium (a peripheral nAChR antagonist) or methyllycaconitine citrate (an α7 nAChR antagonist). Furthermore, LXM-15 significantly inhibited the phosphorylation of JAK2 and STAT3, and suppressed the expressions of TNF-α and c-fos in dorsal root ganglia of CCI rats. Collectively, we reported that LXM-15 relieved chronic inflammatory pain in CFA mice and chronic neuropathic pain in CCI rats. The underlying mechanism might be related to the activation of peripheral α7 nicotinic receptor, further inhibiting JAK2/STAT3 signaling pathway, and eventually suppressing the expressions of TNF-α and c-fos.

Key words: Spirocyclopiperazinium salt compound LXM-15, Chronic pain, α7 nicotinic receptor, JAK2/STAT3 signaling pathway

CLC Number:

R966

Supporting:

Ning Li, Yingying Liang, Qi Sun, Yimin Jiang, Runtao Li, Jia Ye. The spirocyclopiperazinium salt compound LXM-15 alleviates chronic inflammatory and neuropathic pain in mice and rats[J]. Journal of Chinese Pharmaceutical Sciences, 2019, 28(6): 371-380.

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The spirocyclopiperazinium salt compound LXM-15 alleviates chronic inflammatory and neuropathic pain in mice and rats

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