Circulating (Poly)phenol Metabolites: Neuroprotection in a 3D Cell Model of Parkinson’s Disease

Molecular nutrition & Food Research
Carecho Rafael, Figueira Inês, Terrasso Ana Paul, Godinho-Pereira Joana, de Oliveira Sequeira Catarina, Azeredo Pereira Sofia, Milenkovic Dragan, Leist Marcel, Brito Catarina, Nunes Dos Santos Cláudia
DOI: 10.1002/mnfr.202100959
PMID: 34964254
Keyword: Dopaminergic neurons · Gene expression · Neurodegeneration · Preconditioning · Transcriptomics


Scope: Diets rich in (poly)phenols have been associated with positive effects on neurodegenerative disorders, such as Parkinson’s disease (PD). Several low-molecular weight (poly)phenol metabolites (LMWPM) are found in the plasma after consumption of (poly)phenol-rich food. It is expected that LMWPM, upon reaching the brain, may have beneficial effects against both oxidative stress and neuroinflammation, and possibly attenuate cell death mechanisms relate to the loss of dopaminergic neurons in PD.

Methods and results: This study investigates the neuroprotective potential of two blood-brain barrier permeant LMWPM, catechol-O-sulfate (cat-sulf), and pyrogallol-O-sulfate (pyr-sulf), in a human 3D cell model of PD. Neurospheroids were generated from LUHMES neuronal precursor cells and challenged by 1-methyl-4-phenylpyridinium (MPP+ ) to induce neuronal stress. LMWPM pretreatments were differently neuroprotective towards MPP+ insult, presenting distinct effects on the neuronal transcriptome. Particularly, cat-sulf pretreatment appeared to boost counter-regulatory defense mechanisms (preconditioning). When MPP+ is applied, both LMWPM positively modulated glutathione metabolism and heat-shock response, as also favorably shifting the balance of pro/anti-apoptotic proteins.

Conclusions: Our findings point to the potential of LMWPM to trigger molecular mechanisms that help dopaminergic neurons to cope with a subsequent toxic insult. They are promising molecules to be further explored in the context of preventing and attenuating parkinsonian neurodegeneration.

Keywords: dopaminergic neurons; gene expression; neurodegeneration; preconditioning; transcriptomics.

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