Title:Resveratrol Regulates Nrf2-Mediated Expression of Antioxidant and Xenobiotic Metabolizing Enzymes in Pesticides-Induced Parkinsonism
Volume: 27
Issue: 10
Author(s): Mohd Sami Ur Rasheed, Manish Kumar Tripathi, Devendra Kumar Patel and Mahendra Pratap Singh*
Affiliation:
- Toxicogenomics and Predictive Toxicology Laboratory, Systems Toxicology and Health Risk Assessment Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Lucknow 226 001, Uttar Pradesh,India
Keywords:
Combined maneb (MB), paraquat (PQ), resveratrol, Nrf2, Cyp2d22, CYP2D6.
Abstract:
Background: Combined maneb (MB) and paraquat (PQ), two widely used pesticides, increases
oxidative stress leading to Parkinsonism. Xenobiotic metabolizing enzymes, cytochrome
P450 (CYP) 2D6 and its mouse ortholog Cyp2d22 protect against Parkinsonism. Resveratrol, an antioxidant,
restores antioxidant defense system through the activation of nuclear factor erythroid 2-
related factor 2 (Nrf2). However, a crosstalk between Cyp2d22/CYP2D6-mediated protection and
resveratrol-induced Nrf2 activation leading to neuroprotection is not yet elucidated.
Objective: The study aimed to decipher the effect of resveratrol on Nrf2 activation and expression
of its downstream mediators, nicotinamide adenine dinucleotide phosphate quinone oxidoreductase
1 (NQO1) and thioredoxin 1 (Trx1) along with Cyp2d22/CYP2D6 activity in combined MB and
PQ mouse model of Parkinsonism and differentiated neuroblastoma cells.
Results: MB and PQ reduced the dopamine content (mouse) and Cyp2d22/CYP2D6 activity
(mouse/neuroblastoma cells) and increased the nuclear translocation of Nrf2 and expression of
NQO1 and Trx1 (both). Resveratrol ameliorated pesticides-induced changes in dopamine content
and Cyp2d22/CYP2D6 activity. It was found to promote nuclear translocation of Nrf2 and expression
of NQO1 and Trx1 proteins. Since Cyp2d22/CYP2D6 inhibitor (ketoconazole/quinidine) per
se reduced Cyp2d22/CYP2D6 activity and dopamine content, it was found to substantially increase
the pesticides-induced reduction in Cyp2d22/CYP2D6 activity and dopamine content. Inhibitors
normalized the pesticides induced changes in Nrf2 translocation and NQO1 and Trx1 levels in pesticides
treated groups.
Conclusion: The results suggest that resveratrol promotes the catalytic activity of xenobiotic metabolizing
enzyme, Cyp2d22/CYP2D6, which partially contributes to Nrf2 activation in pesticides-
induced Parkinsonism.