MiR-1906 attenuates neuropathic pain in rats by regulating the TLR4/mTOR/ Akt signaling pathway

Abstract

This study determined the role of miR-1906 in neuropathic pain and proliferation in neuronal cells using a chronic constriction injury (CCI)-induced neuropathic pain (NP) rat model. NP was induced by CCI. Animals were divided into a sham group, an NP group, and a miR-1906 mimic group, which received 500 nmol/kg of a miR-1906 mimic intrathecally for 10 consecutive days following surgery. The effect of miR-1906 agomir was determined by estimating the thermal and mechanical withdrawal latency; an enzyme-linked immunosorbent assay (ELISA) was used to determine the concentration of proinflammatory mediators. Western blotting and reverse-transcription polymerase chain reaction (RT-PCR) were used to determine protein expression in the spinal tissues of the CCI-induced neuropathic pain rat model. Administration of miR-1906 agomir increased the mechanical and thermal withdrawal latency period and the levels of inflammatory mediators compared with the NP group. Western blotting showed that treatment with miR-1906 agomir attenuated the levels of Akt, mTOR, TLR-4, and PI3K proteins in the spinal tissues of the CCI-induced neuropathic pain model. TLR-4 and NF-κB gene expression was lower in the miR-1906 agomir group than in the NP group. miR-1906 gene stimulation reduced neuropathic pain by enhancing Akt/nTOR/PI3K and TLR-4/NF-κB pathway regulation.