Long-term dietary supplementation with the green tea cultivar Sunrouge prevents age-related cognitive decline in the senescence-accelerated mouse Prone8

• Published in: Bioscience, biotechnology, and biochemistry Vol. 83; no. 2; pp. 339 - 347
• Main Authors: Wasai, Masafumi, Nonaka, Haruna, Murata, Motoki, Kitamura, Ryo, Sato, Yuka, Tachibana, Hirofumi
• Format: Journal Article
• Language: English
• Published: England Taylor & Francis 01.02.2019; Oxford University Press
• Subjects: Acetylcholinesterase - metabolism; Aging - psychology; Amyloid beta-Peptides - metabolism; Amyloid beta-Protein Precursor - metabolism; Animals; Brain - enzymology; Cognition Disorders - prevention & control; cognitive decline; delphinidin; Dietary Supplements; Enzymes - genetics; Enzymes - metabolism; Green tea; Male; Mice; Mice, Mutant Strains; myricetin; Neprilysin - genetics; Peptide Fragments - metabolism; Sunrouge; Tea - chemistry; Sunrouge; myricetin; cognitive decline; Green tea; delphinidin
• ISSN: 0916-8451; 1347-6947
• DOI: 10.1080/09168451.2018.1530093

A majority of the potential health benefits of green tea, including the potential to prevent cognitive decline, have been attributed to epigallocatechin gallate (EGCG). Sunrouge is a green tea cultivar that contains EGCG and several other bioactive components such as quercetin, myricetin, cyanidin and delphinidin. We compared the effects of Sunrouge and Yabukita, the most popular Japanese green tea cultivar, on cognitive function in the senescence-accelerated mouse Prone8. These mice were fed an experimental diet containing Sunrouge extract (SRE) or Yabukita extract (YBE). SRE feeding significantly prevented cognitive decline, whereas YBE feeding had little effect. Moreover, SRE feeding prevented elevation of the amyloid-β42 level while improving the gene expression of neprilysin and decreasing beta-site APP-cleaving enzyme 1 in the brain. These preventive effects of SRE against cognitive decline were attributed to the characteristic composition of Sunrouge and strongly suggest that consumption of this cultivar could protect against age-related cognitive decline. Long-term supplementation with the unique green tea cultivar Sunrouge prevents age-related cognitive decline in SAMP8 by targeting the amyloid cascade.