Ellagic acid mitigates deoxyaconitine-induced neurotoxicity by improving mitochondrial function

Area of Science:

• Neuroscience
• Pharmacology
• Toxicology

Background:

• Ellagic acid (EA) is a natural polyphenol with known pharmacological benefits, including neuroprotection.
• Deoxyaconitine (DA), a neurotoxic alkaloid from Aconitum species, poses challenges for clinical use due to its toxicity.
• Understanding DA's toxicological mechanisms is crucial for safe therapeutic applications.

Purpose of the Study:

• To investigate the neuroprotective efficacy of EA against DA-induced neurotoxicity.
• To elucidate the underlying mechanisms of EA's neuroprotective effects in a model organism.

Main Methods:

• Utilized a Caenorhabditis elegans (C. elegans) model to study DA-induced neurotoxicity.
• Assessed neurodegeneration in multiple neuronal circuits (dopaminergic, serotonergic, glutamatergic, GABAergic).
• Measured reactive oxygen species (ROS) levels, lipofuscin deposition, and apoptotic cell death.

Main Results:

• EA significantly alleviated DA-induced neurodegeneration across all tested neuronal circuits.
• EA treatment reduced ROS levels, lipofuscin accumulation, and apoptotic cell death.
• Mechanistic studies revealed EA attenuates oxidative stress, restores energy metabolism, modulates neurotransmitters, improves mitochondrial function, and activates IIS and p38 MAPK pathways.

Conclusions:

• EA demonstrates significant neuroprotective effects against DA-induced toxicity in C. elegans.
• EA acts through multiple mechanisms including antioxidant effects, metabolic regulation, and signaling pathway activation.
• EA is a promising adjuvant for counteracting DA neurotoxicity, potentially enhancing the safety of Aconitum-based medicines.