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J Nutr. 2017 Oct;147(10):1926-1931. doi: 10.3945/jn.117.255034. Epub 2017 Aug 23.

Epigallocatechin Gallate Has a Neurorescue Effect in a Mouse Model of Parkinson Disease.

Author information

1
Departments of Food Science and Human Nutrition and.
2
School of Public Health, Shanghai University of Traditional Chinese Medicine, Shanghai, China.
3
Biomedical Sciences, Iowa State University, Ames, IA; and.
4
Departments of Food Science and Human Nutrition and mbreddy@iastate.edu.

Abstract

Background: Parkinson disease (PD) is a neurodegenerative disorder that has been associated with many factors, including oxidative stress, inflammation, and iron accumulation. The antioxidant, anti-inflammatory, and iron-chelating properties of epigallocatechin gallate (EGCG), a major polyphenol in green tea, may offer protection against PD.Objective: We sought to determine the neurorescue effects of EGCG and the role of iron in 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced PD.Methods: We evaluated the neurorescue effect of EGCG (25 mg/kg, 7 d, oral administration) against MPTP-induced (20 mg/kg, 3 d, intraperitoneal injection) neurodegeneration in C57 male black mice. Thirty mice weighing ∼25 g were divided into 3 groups: control, MPTP, and MPTP + EGCG. The neurorescue effect of EGCG was assessed with the use of motor behavior tests, neurotransmitter analysis, oxidative stress indicators, and iron-related protein expression.Results: Compared with the control group, MPTP treatment shortened the mice's latency to fall from the rotarod by 16% (P < 0.05), decreased the striatal dopamine concentration by 58% (P < 0.001) and dihydroxyphenylacetic acid by 35% (P < 0.05), and increased serum protein carbonyls by 71% (P = 0.07). However, EGCG rescued MPTP-induced neurotoxicity by increasing the rotational latency by 17% (P < 0.05) to a value similar to the control group. Striatal dopamine concentrations were 40% higher in the MPTP + EGCG group than in the MPTP group (P < 0.05), but the values were significantly lower than in the control group. Compared with the MPTP and control groups, mice in the MPTP + EGCG group had higher substantia nigra ferroportin expression (44% and 35%, respectively) (P < 0.05) but not hepcidin and divalent metal transporter 1 expression.Conclusion: Overall, our study demonstrated that EGCG regulated the iron-export protein ferroportin in substantia nigra, reduced oxidative stress, and exerted a neurorescue effect against MPTP-induced functional and neurochemical deficits in mice.

KEYWORDS:

EGCG; MPTP; Parkinson disease; ferroportin; oxidative stress

PMID:
28835392
PMCID:
PMC5610551
DOI:
10.3945/jn.117.255034
[Indexed for MEDLINE]
Free PMC Article

Conflict of interest statement

Author disclosures: QX, ML, AGK, and MBR, no conflicts of interest.

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