Chrysophanol Ameliorates Hemin-Induced Oxidative Stress and Endoplasmic Reticulum Stress by Regulating...

Area of Science:

• Neuroscience
• Molecular Biology
• Pharmacology

Background:

• Intracerebral hemorrhage (ICH) causes brain injury through oxidative stress, endoplasmic reticulum (ER) stress, and neuronal apoptosis.
• Chrysophanol (CHR) exhibits neuroprotective effects, but its specific mechanisms in ICH are not fully understood.

Purpose of the Study:

• To investigate the neuroprotective role and underlying molecular mechanisms of Chrysophanol (CHR) in an in vitro model of intracerebral hemorrhage (ICH).
• To elucidate how CHR alleviates hemin-induced oxidative stress, ER stress, and apoptosis in HT22 cells.

Main Methods:

• Established an in vitro ICH model using HT22 cells treated with hemin, followed by CHR intervention.
• Assessed cell viability (CCK-8), apoptosis (TUNEL), ER stress, and oxidative stress markers via Western blot and assay kits.
• Employed microRNA-sequencing, bioinformatics, dual-luciferase reporter assays, and rescue experiments to identify molecular targets.

Main Results:

• CHR significantly increased cell viability and reduced apoptosis, ER stress, and oxidative stress in hemin-treated HT22 cells.
• CHR regulated the miR-320-5p/Wnt3a axis, inhibiting Wnt3a expression by competitively sponging miR-320-5p.
• Rescue experiments confirmed that CHR's protective effects were mediated through the miR-320-5p/Wnt3a/β-catenin pathway.

Conclusions:

• Chrysophanol (CHR) demonstrates significant neuroprotective properties against hemin-induced injury in HT22 cells.
• CHR exerts its effects by inhibiting the miR-320-5p/Wnt3a/β-catenin pathway, thereby reducing apoptosis, ER stress, and oxidative stress.
• CHR represents a promising therapeutic candidate for managing brain damage following intracerebral hemorrhage (ICH).