Related Experiment Video
Updated: Nov 18, 2025
08:16
Partial Sciatic Nerve Ligation: A Mouse Model of Chronic Neuropathic Pain to Study the Antinociceptive Effect of Novel Therapies
Published on: October 6, 2022
7.0K
MiR-122-5p suppresses neuropathic pain development by targeting PDK4
Lanlan Wan1, Zhen Su2, Fayin Li2
1Department of Otolaryngological, The Affiliated Huai'an NO.1 People's Hospital of Nanjing Medical University, Huai'an Jiangsu, China.
Neurochemical Research
|February 10, 2021
Summary
MicroRNA-122-5p (miR-122-5p) down-regulation is linked to neuropathic pain. Restoring miR-122-5p levels suppresses pain by inhibiting PDK4 expression, offering a potential therapeutic target.
Area of Science:
- Neuroscience
- Molecular Biology
- Pain Research
Background:
- Neuropathic pain presents complex challenges due to its intricate pathogenesis and limited treatment efficacy.
- MicroRNAs (miRNAs) have emerged as key regulators in the development of neuropathic pain.
- Understanding the specific roles of miRNAs is crucial for developing novel pain therapies.
Purpose of the Study:
- To investigate the functional role of microRNA-122-5p (miR-122-5p) in the development of neuropathic pain.
- To elucidate the molecular mechanism by which miR-122-5p influences neuropathic pain.
- To explore the therapeutic potential of targeting miR-122-5p for neuropathic pain treatment.
Main Methods:
- Assessed miR-122-5p expression in the spinal cords of rats with neuropathic pain.
- Utilized lentivirus-mediated intrathecal delivery of miR-122-5p in a mouse model of chronic sciatic nerve injury (CCI).
- Performed luciferase reporter assays to identify PDK4 as a target gene of miR-122-5p.
- Investigated the effects of miR-122-5p and PDK4 silencing (shPDK4) on pain behaviors in CCI mice.
Main Results:
- Down-regulation of miR-122-5p was observed in the spinal cords of rats with neuropathic pain.
- Overexpression of miR-122-5p via lentivirus attenuated neuropathic pain behaviors in CCI mice.
- miR-122-5p directly targets and inhibits PDK4 expression, which is upregulated in neuropathic pain.
- Both miR-122-5p overexpression and shPDK4 suppressed mechanical allodynia and thermal hyperalgesia; combined treatment showed enhanced inhibition.
Conclusions:
- miR-122-5p plays a critical inhibitory role in the development of neuropathic pain.
- The mechanism involves the direct suppression of PDK4 expression by miR-122-5p.
- miR-122-5p represents a promising therapeutic target for managing neuropathic pain.
