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miR-124/VAMP3 is a novel therapeutic target for mitigation of surgical trauma-induced microglial activation
Abstract
Activation of microglia and the subsequently elevated inflammatory cytokine release in the brain during surgery predispose individuals to cognitive dysfunction, also known as postoperative cognitive dysfunction (POCD). miR-124 is one of the most abundant microRNAs in the brain that regulates microglial function. Elucidating the role of miR-124 in microglial activation in the context of surgery may therefore promote understanding of as well as therapeutic development for post-surgical disorders involving microglial activation. The downstream targets of miR-124 were investigated using bioinformatic screening and dual-luciferase reporter assay validation, and vesicle-associated membrane protein 3 (VAMP3) was identified as a potential target. The kinetics of miR-124/VAMP3 expression was first examined in vitro in microglial cells (primary microglia and BV2 microglial cells) following lipopolysaccharide (LPS) stimulation. LPS induced a time-dependent decrease of miR-124 and upregulated the expression of VAMP3. Manipulating miR-124/VAMP3 expression by using miR-124 mimics or VAMP3-specific siRNA in LPS-stimulated BV2 microglial cells inhibited BV2 microglial activation-associated inflammatory cytokine release. To further examine the role of miR-124/VAMP3 in a surgical setting, we employed a rat surgical trauma model. Significant microglial activation and altered miR-124/VAMP3 expression were observed following surgical trauma. We also altered miR-124/VAMP3 expression in the rat surgical trauma model by administration of exogenous miR-124 and by using electroacupuncture, which is a clinically applicable treatment that modulates microglial function and minimizes postoperative disorders. We determined that electroacupuncture treatment specifically increases the expression of miR-124 in the hypothalamus and hippocampus. Increased miR-124 expression with a concomitant decrease in VAMP3 expression resulted in decreased inflammatory cytokine release related to microglial activation post-surgery. Our study indicates that miR-124/VAMP3 is involved in surgery-induced microglial activation and that targeting miR-124/VAMP3 could be a potential therapeutic strategy for postoperative disorders involving microglial activation.
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“The dynamic balance between M1 and M2 polarization is important for nerve recovery (Chen et al. 2019).”
From MiR-124 and MiR-155 as Therapeutic Targets in Microglia-Mediated Inflammation in Multiple Sclerosis (2025) · cites this paper as Chen et al. 2019
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“MiR-124, by targeting vesicle-associated membrane protein 3, contributed to the switch to the M2 phenotype and decreased microglial activation-mediated neuroinflammation (Chen et al. 2019).”
From MiR-124 and MiR-155 as Therapeutic Targets in Microglia-Mediated Inflammation in Multiple Sclerosis (2025) · cites this paper as Chen et al. 2019
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Derogar, M., Orsini, N., Sadr-Azodi, O., & Lagergren, P. (2012) · Journal of Clinical Oncology · doi:10.1200/jco.2011.40.3568 · Cited by 217
miR‐124 Contributes to the functional maturity of microglia
Svahn, A. J., Giacomotto, J., Graeber, M. B., Rinkwitz, S., & Becker, T. S. (2016) · Developmental Neurobiology · doi:10.1002/dneu.22328 · Cited by 42
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Cited by
Sorted by citations
miR-124: A Promising Therapeutic Target for Central Nervous System Injuries and Diseases
Xu, J., Zheng, Y., Wang, L., Liu, Y., Wang, X., Li, Y., & Chi, G. (2022) · Cellular and Molecular Neurobiology · doi:10.1007/s10571-021-01091-6 · Cited by 55
MiR-124 and MiR-155 as Therapeutic Targets in Microglia-Mediated Inflammation in Multiple Sclerosis
Asl, E. R., Hosseini, S. E., Tahmasebi, F., Bolandi, N., & Barati, S. (2025) · Cellular and Molecular Neurobiology · doi:10.1007/s10571-025-01578-6 · Cited by 19
Metadata
- Authors
- Chen, Y., Sun, J.-X., Chen, W.-K., Wu, G.-C., Wang, Y.-Q., Zhu, K.-Y., & Wang, J.
- Venue
- Signal Transduction and Targeted Therapy
- Published
- 2019-08-16
- Volume
- 4
- Issue
- 1
- ISSN
- 2059-3635
- PMC
- PMC6799846
- Cited by
- 74
- References
- 3
- Language
- en
- Funders
- China Scholarship Council (201700260280)
- National Natural Science Foundation of China (81871591, 81202746)
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