Curcumin Protects against White Matter Injury through NF-κB and Nrf2 Cross Talk

Area of Science:

• Neuroscience
• Pharmacology
• Biochemistry

Background:

• White matter injury (WMI) is associated with inflammation and oxidative stress.
• Curcumin (Cur), a natural compound, possesses anti-inflammatory and antioxidant properties.
• Understanding Curcumin's neuroprotective mechanisms in WMI is crucial.

Purpose of the Study:

• To investigate the neuroprotective effects of Curcumin on white matter injury.
• To explore the underlying mechanisms of Curcumin's action in WMI.
• To assess Curcumin's impact on inflammation, oxidative stress, and apoptosis in WMI.

Main Methods:

• White matter injury was induced in Sprague-Dawley rats via dorsal column removal and hypoxia.
• Animals were treated with Curcumin (Cur) or vehicle.
• Key molecular markers, including HIF1-α, GFAP, NF-H, pro-inflammatory cytokines (TNF-α, IL-1), and apoptosis (TUNEL assay), were analyzed. NF-κB and Nrf2 pathways were investigated.

Main Results:

• Curcumin treatment significantly inhibited hypoxia-induced HIF1-α expression and tissue damage, improving astrocyte morphology and reducing vacuolation.
• Curcumin reduced the upregulation of GFAP and NF-H, and downregulated pro-inflammatory cytokines TNF-α and IL-1.
• Curcumin attenuated apoptosis and modulated the cross-talk between NF-κB and Nrf2 signaling pathways, inhibiting NF-κB activation and reducing reactive oxygen species (ROS).

Conclusions:

• Curcumin demonstrates significant neuroprotective effects against hypoxia-induced white matter injury.
• Curcumin mitigates WMI by inhibiting inflammation, oxidative stress, and apoptosis.
• The neuroprotective mechanism involves the modulation of NF-κB and Nrf2 signaling pathways.