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Polyphenol-Enriched Fraction from Chestnut Shells as a Source of Bioactive Compounds for Friedreich Ataxia.

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Chestnut shell extracts rich in polyphenols, like protocatechuic acid (PCA), show promise in inhibiting ferroptosis, a key process in Friedreich Ataxia (FRDA). These natural compounds may offer a new therapeutic avenue for this inherited neurodegenerative disease.

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Area of Science:

  • Biochemistry
  • Neuroscience
  • Pharmacology

Background:

  • Friedreich Ataxia (FRDA) is an inherited neurodegenerative disease impacting the nervous system and heart.
  • Ferroptosis, a form of regulated cell death, is implicated in FRDA pathogenesis.
  • Polyphenols from natural sources are being investigated for therapeutic potential.

Purpose of the Study:

  • To evaluate the efficacy of chestnut shell extracts in preventing ferroptosis in FRDA.
  • To identify specific phenolic compounds responsible for the observed protective effects.
  • To explore the molecular mechanisms underlying the anti-ferroptosis activity.

Main Methods:

  • Preparation of a low molecular weight, polyphenol-rich fraction from chestnut shells using eco-sustainable methods.
  • Analysis of phenolic compounds using UHPLC-ITMS^n and RP-HPLC-UV.
  • Cellular assays using patient-derived FRDA fibroblasts treated with ferroptosis inducers and phenolic compounds.

Main Results:

  • Chestnut shell extract and its polyphenol-rich fraction (Fraction D) significantly increased cell survival under ferroptosis-inducing conditions.
  • Protocatechuic acid (PCA) was identified as a key active compound, dose-dependently reducing lipid peroxidation and enhancing cell survival.
  • PCA also improved survival in cells with reduced frataxin levels and modulated ALOX12 expression.

Conclusions:

  • Low molecular weight polyphenols from chestnut shells, particularly PCA, exhibit significant anti-ferroptosis activity relevant to FRDA.
  • PCA demonstrates potential as a therapeutic agent for FRDA by mitigating ferroptosis and related cellular damage.
  • Further investigation into PCA's role in FRDA pathophysiology is warranted.