Related Experiment Video
Updated: Sep 21, 2025
Detection of MicroRNAs in Microglia by Real-time PCR in Normal CNS and During Neuroinflammation
Published on: July 23, 2012
MicroRNA-124 modulates neuroinflammation in acute methanol poisoning rats via targeting Krüppel-like factor-6
Shu Zhou1, Jinjun Li1, XiaoNa Zhang2
1Department of Emergency, Liuyang People's Hospita, Liuyang City, Hunan Province, China.
Abstract:
Microglia activation-stimulated neuroinflammation exerts functionally in neurodegenerative diseases like brain injury. Acute methanol poisoning (AMP) is a crucial cause of death and morbidity that possibly leads to neuroinflammation. Studies have manifested that miRNAs can modulate microglia activation to mediate neuroinflammation. Nevertheless, the role of miR-124 in AMP-stimulated neuroinflammation is uncertain. This research was to explore the action of miR-124 in AMP-stimulated neuroinflammation and its molecular mechanism. The study findings indicated that AMP accelerated microglia activation and stimulated inflammation and oxidative stress in brain tissue of rats. MiR-124 expression was lowered in AMP rats, while KLF6 expression was elevated. Elevated miR-124 or repressed KLF6 increased the number of CD206+ cells and decreased the number of CD68+ cells, as well as restrained inflammation and NF-κB phosphorylation and induced superoxide dismutase, Nrf2/HO-1, and M2 polarization. MiR-124 modulated microglia activation via targeting KLF6. AMP repressed neuronal viability and enhanced neuronal apoptosis. Suppression of miR-124 further promoted AMP-induced damage to neurons, while inhibition of KLF6 turned around this phenomenon. Anyway, our study demonstrated that miR-124 accelerates M2 polarization via targeting KLF6 to ameliorate AMP-stimulated neuronal damage.
Insights
MicroRNA-124 (miR-124) mitigates neuroinflammation and neuronal damage in acute methanol poisoning (AMP) by targeting KLF6, promoting beneficial M2 microglia polarization and reducing oxidative stress.
Area of Science:
- Neuroscience
- Molecular Biology
- Toxicology
Background:
- Neuroinflammation, driven by microglia activation, is implicated in neurodegenerative diseases and acute methanol poisoning (AMP).
- MicroRNAs (miRNAs) regulate microglia activation, but the specific role of miR-124 in AMP-induced neuroinflammation remains unclear.
Purpose of the Study:
- To investigate the role and molecular mechanism of miR-124 in AMP-stimulated neuroinflammation.
- To determine if miR-124 influences microglia polarization and subsequent neuronal damage in AMP.
Main Methods:
- Examined microglia activation, inflammation, and oxidative stress markers in rat brain tissue following AMP.
- Quantified miR-124 and KLF6 expression levels.
- Assessed the effects of modulating miR-124 and KLF6 on microglia polarization (CD206+, CD68+), inflammatory pathways (NF-κB), antioxidant markers (SOD, Nrf2/HO-1), and neuronal viability/apoptosis.
Main Results:
- AMP induced microglia activation, inflammation, and oxidative stress, with decreased miR-124 and increased KLF6 expression.
- Upregulating miR-124 or downregulating KLF6 promoted M2 microglia polarization, reduced inflammation and oxidative stress, and protected neurons from AMP-induced damage.
- MiR-124 directly targets KLF6 to mediate these effects.
Conclusions:
- MiR-124 plays a protective role in acute methanol poisoning by targeting KLF6.
- MiR-124 promotes M2 microglia polarization, thereby ameliorating neuroinflammation and neuronal damage in AMP.
- Targeting miR-124 represents a potential therapeutic strategy for acute methanol poisoning.
