Curcumin by down-regulating NF-kB and elevating Nrf2, reduces brain edema and neurological dysfunction after cerebral...

Area of Science:

• Neuroscience
• Pharmacology
• Biochemistry

Background:

• Cerebral ischemia/reperfusion (I/R) injury involves critical factors like oxidation, inflammation, and apoptosis.
• Curcumin possesses known anti-oxidative, anti-inflammatory, and anti-apoptotic properties.
• The precise molecular mechanisms of curcumin's protective effects in cerebral I/R injury require further elucidation.

Purpose of the Study:

• To investigate the therapeutic effects of curcumin on cerebral I/R injury.
• To assess curcumin's impact on brain water content, infarction volume, and the expression of key regulatory proteins.
• To examine the roles of nuclear factor-kappa-B (NF-κB) and nuclear factor-erythroid-related factor-2 (Nrf2) in curcumin's protective mechanism.

Main Methods:

• A rat model of cerebral I/R injury was established using middle cerebral artery occlusion (MCAO).
• Curcumin was administered intraperitoneally to MCAO rats 30 minutes post-occlusion.
• Neurological deficit scores, blood-brain barrier disruption, brain water content, infarction volume, and protein expression (NF-κB, Nrf2) were evaluated.

Main Results:

• MCAO induced significant neurological deficits, BBB disruption, increased brain water content, and infarction volume.
• NF-κB expression was elevated in the MCAO group.
• Curcumin treatment (MCAO+CUR) led to a significant reduction in brain water content and infarction volume, accompanied by decreased NF-κB and increased Nrf2 expression.

Conclusions:

• Curcumin demonstrates protective effects against cerebral I/R injury.
• These protective effects are attributed to curcumin's anti-oxidative, anti-inflammatory, and anti-apoptotic activities.
• Curcumin modulates cerebral I/R injury by upregulating Nrf2 and down-regulating NF-κB expression.