Related Experiment Video
Updated: Dec 31, 2025
Magnetic Isolation of Microglial Cells from Neonate Mouse for Primary Cell Cultures
Published on: July 25, 2022
Dexamethasone sodium phosphate attenuates lipopolysaccharide-induced neuroinflammation in microglia BV2 cells
Bin Hui1,2, Xin Yao3, Liping Zhang4
1College of Pharmacy, Shanghai University of Medical & Health Sciences, Shanghai, China.
Abstract:
Abnormal neuroinflammation ignited by overproduction of chemokines and cytokines via microglial cells can induce the occurrence and development of neurodegenerative disorders. The aim of this study is to investigate the effects of dexamethasone sodium phosphate (Dex-SP) on chemokine and cytokine secretion in lipopolysaccharide (LPS)-activated microglial cells. LPS markedly enhanced the secretion of pro-inflammatory factors such as regulated on activation, normal T cell expressed and secreted (RANTES), transforming growth factor beta-β1 (TGF-β1) and nitric oxide (NO), but decreased the production of macrophage inflammatory protein-1α (MIP-1α) and interleukin 10 (IL-10) in BV-2 microglial cells. Furthermore, LPS increased BV-2 microglial cell migration. However, Dex-SP treatment had the opposite effect, dampening the secretion of RANTES, TGF-β1, and NO, while increasing the production of MIP-1α and IL-10 and blocking migration of LPS-stimulated BV-2 microglial cells. Furthermore, Dex-SP markedly suppressed the LPS-induced degradation of IRAK-1 and IRAK-4, and blocked the activation in TRAF6, p-TAK1, and p-JNK in BV-2 microglial cells. These results showed that Dex-SP inhibited the neuroinflammatory response and migration in LPS-activated BV-2 microglia by inhibiting the secretion of RANTES, TGF-β1, and NO and increasing the production of MIP-1α and IL-10. The molecular mechanism of Dex-SP may be associated with inhibition of TRAF6/TAK-1/JNK signaling pathways mediated by IRAK-1 and IRAK-4.
Insights
Dexamethasone sodium phosphate (Dex-SP) reduces neuroinflammation by decreasing pro-inflammatory factors and cell migration in activated microglial cells. This study reveals Dex-SP
Area of Science:
- Neuroscience
- Immunology
- Pharmacology
Background:
- Neuroinflammation, driven by microglial cells, contributes to neurodegenerative disorders.
- Chemokines and cytokines play a critical role in mediating neuroinflammatory responses.
Purpose of the Study:
- To investigate the effects of dexamethasone sodium phosphate (Dex-SP) on chemokine and cytokine secretion in lipopolysaccharide (LPS)-activated microglial cells.
- To elucidate the molecular mechanisms underlying Dex-SP's anti-inflammatory actions.
Main Methods:
- Utilized BV-2 microglial cells stimulated with lipopolysaccharide (LPS).
- Assessed the secretion levels of various chemokines and cytokines (RANTES, TGF-β1, NO, MIP-1α, IL-10).
- Evaluated microglial cell migration and key signaling pathway components (IRAK-1, IRAK-4, TRAF6, TAK-1, JNK).
Main Results:
- LPS stimulation increased pro-inflammatory factors (RANTES, TGF-β1, NO) and cell migration, while decreasing anti-inflammatory factors (MIP-1α, IL-10).
- Dex-SP treatment reversed these effects, reducing pro-inflammatory markers and migration, and increasing anti-inflammatory markers.
- Dex-SP inhibited LPS-induced degradation of IRAK-1 and IRAK-4, and blocked activation of TRAF6, p-TAK1, and p-JNK signaling pathways.
Conclusions:
- Dex-SP effectively suppresses neuroinflammation and microglial cell migration in LPS-activated cells.
- The anti-inflammatory mechanism of Dex-SP involves the inhibition of the IRAK-1/IRAK-4 mediated TRAF6/TAK-1/JNK signaling pathway.
- Dex-SP demonstrates therapeutic potential for neuroinflammatory conditions.
