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Ospelnikova T, Shitova A, Voskresenskaya O, Ermilova E. Neuroinflammation in the pathogenesis of central neuropathic pain. Zh Nevrol Psikhiatr Im S S Korsakova 2022; 122:7-13. [DOI: 10.17116/jnevro20221220617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Wang X, Jiang Y, Li J, Wang Y, Tian Y, Guo Q, Cheng Z. DUSP1 Promotes Microglial Polarization toward M2 Phenotype in the Medial Prefrontal Cortex of Neuropathic Pain Rats via Inhibition of MAPK Pathway. ACS Chem Neurosci 2021; 12:966-978. [PMID: 33666084 DOI: 10.1021/acschemneuro.0c00567] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Shifting microglial polarization from M1 toward M2 phenotype represents a promising therapeutic strategy for neuropathic pain (NP). Dual-specificity phosphatase-1 (DUSP1) is a key component in regulating anti-inflammatory response. The medial prefrontal cortex (mPFC) is implicated in emotional disorders associated with NP and constitutes a neuroanatomical substrate for exploring mechanisms underlying NP. This study aims to investigate whether DUSP1 regulates microglial M1/M2 polarization in the mPFC in a rat model of NP. Rat model of NP was established by chronic constriction injury (CCI) of the rat sciatic nerve. Lipopolysaccharide (LPS) was used to activate HAPI rat microglial cells as an in vitro inflammatory model. CCI-induced decreased pain threshold, increased cell apoptosis in mPFC, elevated pro-inflammatory M1/M2 microglia ratio, and activated MAPK signaling in the mPFC of rats. Importantly, intra-mPFC injection of DUSP1-expressing lentivirus counteracted these abnormalities. In vitro assay further confirmed that DUSP1 overexpression switched microglial M1 to M2 polarization through inhibition of MAPK signaling activation. DUSP1 switched microglial M1 to M2 polarization in the mPFC and attenuated CCI-induced NP by inhibiting the MAPK signaling.
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Affiliation(s)
- Ximei Wang
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Yuan Jiang
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Jingyi Li
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Yunjiao Wang
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Ying Tian
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Qulian Guo
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Zhigang Cheng
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
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