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Papers of the Week

Papers: 4 Feb 2023 - 10 Feb 2023

Basic Science

Animal Studies, Molecular/Cellular, Pharmacology/Drug Development

Cancer Pain, Neuropathic Pain

2023 Feb 02

Mol Pain


NFATc2-dependent Epigenetic Downregulation of the TSC2/Beclin-1 Pathway is Involved in Neuropathic Pain Induced by Oxaliplatin.


Liu M, Mai JW, Luo DX, Liu GX, Xu T, Xin WJ, Lin SY, Li ZY


Neuropathic pain is a common dose-limiting side effect of oxaliplatin, which hampers the effective treatment of tumors. Here, we found that upregulation of transcription factor NFATc2 decreased the expression of Beclin-1, a critical molecule in autophagy, in the spinal dorsal horn, and contributed to neuropathic pain following oxaliplatin treatment. Meanwhile, manipulating autophagy levels by intrathecal injection of rapamycin (RAPA) or 3-methyladenine (3-MA) differentially altered mechanical allodynia in oxaliplatin-treated or naïve rats. Utilizing chromatin immunoprecipitation-sequencing (ChIP-seq) assay combined with bioinformatics analysis, we found that NFATc2 negatively regulated the transcription of tuberous sclerosis complex protein 2 (TSC2), which contributed to the oxaliplatin-induced Beclin-1 downregulation. Further assays revealed that NFATc2 regulated histone H4 acetylation and methylation in the TSC2 promoter site 1 in rats’ dorsal horns with oxaliplatin treatment. These results suggested that NFATc2 mediated the epigenetic downregulation of the TSC2/Beclin-1 autophagy pathway and contributed to oxaliplatin-induced mechanical allodynia, which provided a new therapeutic insight for chemotherapy-induced neuropathic pain.