Green tea supplementation produces better neuroprotective effects than red and black tea in Alzheimer-like rat model

• Published in: Food research international 2017-10, Vol.100 (Pt 1), p.442-448
• Main Authors: Schimidt, Helen L., Garcia, Alexandre, Martins, Alexandre, Mello-Carpes, Pamela B., Carpes, Felipe P.
• Format: Article
• Language: English
• Subjects: Alzheimer Disease - chemically induced; Alzheimer Disease - metabolism; Amyloid beta-Peptides - adverse effects; Animals; Behavior, Animal - drug effects; Body Weight - drug effects; Brain; Camellia sinensis; Catechin - analogs & derivatives; Catechin - pharmacology; Diet; Disease Models, Animal; Epigallocatechin gallate; Hippocampus - chemistry; Hippocampus - drug effects; Male; Memory; Memory - drug effects; Neuroprotective Agents - pharmacology; Oxidative stress; Oxidative Stress - drug effects; Rats; Rats, Wistar; Tea
• ISSN: 0963-9969; 1873-7145
• DOI: 10.1016/j.foodres.2017.07.026

Green tea from Camellia sinensis plays a neuroprotective role in different neurodegenerative conditions, such as memory deficits in Alzheimer disease (AD). However, whether other teas from Camellia sinensis present similar neuroprotective effect still is not clear. Here we investigate effects of green, red and black tea supplementation on memory and hippocampus oxidative status in a rat model of Alzheimer-like disease (AD-like). Method: Wistar male rats were supplemented with green, red or black tea during 8weeks before Aβ intra-hippocampal injection (2μL of Aβ-25–35, CA1 region). AD and sham rats were submitted to memory tests. After euthanasia, oxidative status in the bilateral hippocampus was quantified. Green and red teas avoid memory deficits in AD rats, but only green tea also avoids oxidative stress and damage in the hippocampus. Green tea was more effective for neuroprotection than red and black teas from the Camellia sinensis in the AD rat model. [Display omitted] •Teas from Camellia sinensis present different neuroprotective potentials.•Green and red teas avoid deficits in the short and long-term memories in AD rats.•Green tea avoids oxidative damage in the hippocampus.•Green tea presents the highest content of EGCG.