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Primary Microglia Isolation from Mixed Glial Cell Cultures of Neonatal Rat Brain Tissue
Published on: August 15, 2012
Acetate reduces microglia inflammatory signaling in vitro
Mahmoud L Soliman1, Kendra L Puig, Colin K Combs
1Department of Pharmacology, Physiology and Therapeutics, University of North Dakota School of Medicine and Health Sciences, Grand Forks, ND, USA.
Journal of Neurochemistry
|August 29, 2012
Summary
Acetate supplementation reduces inflammation in microglia by altering histone and protein acetylation. This metabolic pathway impacts inflammatory signaling, offering potential therapeutic benefits.
Area of Science:
- Neuroscience
- Immunology
- Biochemistry
Background:
- Acetate supplementation is known to increase brain acetyl-CoA and histone acetylation.
- Acetate has shown potential in reducing neuroinflammation in vivo, specifically lipopolysaccharide (LPS)-induced neuroglial activation and interleukin (IL)-1β expression.
Purpose of the Study:
- To investigate the hypothesis that acetate metabolism reduces inflammatory signaling in microglia.
- To elucidate the molecular mechanisms by which acetate impacts microglial inflammatory responses.
Main Methods:
- Primary and BV-2 cultured microglia were treated with acetate.
- Measurements included cytokine expression (IL-1β, IL-6, TNF-α, TGF-β1, IL-4), mitogen-activated protein kinase (MAPK) signaling (p38, JNK phosphorylation), histone H3 acetylation (H3K9ac), and nuclear factor-kappa B (NF-κB) alterations.
Main Results:
- Acetate treatment induced histone H3 lysine 9 (H3K9) hyperacetylation and reversed LPS-induced hypoacetylation.
- Acetate treatment reduced LPS-induced IL-1β and tumor necrosis factor-alpha (TNF-α) protein levels, partially attenuated IL-6 mRNA, and increased transforming growth factor-β1 (TGF-β1) and IL-4.
- Acetate modulated MAPK signaling, reduced NF-κB p65 elevation and phosphorylation, and increased NF-κB acetylation.
Conclusions:
- Acetate metabolism effectively reduces inflammatory signaling in microglia.
- Acetate influences both histone and non-histone protein acetylation, contributing to its anti-inflammatory effects.
- These findings suggest acetate as a potential therapeutic agent for neuroinflammatory conditions.
