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Micheliolide suppresses LPS-induced neuroinflammatory responses
Zhaomeng Sun1,2, Guodong Li1,2, Tanjun Tong1,2
1Peking University Research Center on Aging, Beijing, China.
Plos One
|October 18, 2017
Summary
Micheliolide (MCL) reduces neuroinflammation by inhibiting pro-inflammatory factors in microglia. This sesquiterpene lactone shows potential as a neuroprotective agent for neurodegenerative disorders.
Area of Science:
- Neuroscience
- Immunology
- Pharmacology
Background:
- Microglia-driven neuroinflammation contributes to neurodegeneration.
- Inhibiting microglial over-activation may offer therapeutic benefits.
- Micheliolide (MCL) is a known anti-inflammatory sesquiterpene lactone.
Purpose of the Study:
- To investigate MCL's effect on lipopolysaccharide (LPS)-activated BV2 microglia.
- To explore MCL's potential neuroprotective mechanisms in neuroinflammation.
Main Methods:
- BV2 microglia were treated with MCL and stimulated with LPS.
- Analysis of pro-inflammatory mediators (iNOS, COX-2, TNF-α, IL-6, NO, IL-1β) at protein and mRNA levels.
- Investigation of signaling pathways including IκBα/NF-κB, Akt, JNK, p38 MAPK, ERK1/2, and Nrf2/HO-1.
Main Results:
- MCL significantly suppressed LPS-induced expression of iNOS, COX-2, TNF-α, IL-6, and NO.
- MCL reduced mRNA levels of multiple pro-inflammatory cytokines.
- MCL inhibited LPS-induced activation of NF-κB, Akt, JNK, p38 MAPK, and ERK1/2 pathways.
- MCL enhanced heme oxygenase-1 (HO-1) expression via Nrf2 activation.
Conclusions:
- MCL effectively inhibits neuroinflammation in LPS-activated microglia.
- MCL exerts neuroprotection by modulating inflammatory and oxidative stress pathways.
- MCL demonstrates potential as a therapeutic agent for neuroinflammation-related disorders.
