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. 2021 Jan;45(1):e13574.
doi: 10.1111/jfbc.13574. Epub 2020 Nov 29.

Characteristics and upregulation of antioxidant enzymes of kitchen mint and oolong tea kombucha beverages

Wanlapa Tanticharakunsiri  1 , Supachoke Mangmool  2 , Karn Wongsariya  1 , Duangjai Ochaikul  1
Affiliations

Characteristics and upregulation of antioxidant enzymes of kitchen mint and oolong tea kombucha beverages

Wanlapa Tanticharakunsiri et al. J Food Biochem. 2021 Jan.

Abstract

Kombucha is a healthy traditional beverage which is made by fermenting products with a symbiotic culture of acetic acid bacteria and yeasts. In present study, leaves of kitchen mint (Mentha cordifolia Opiz. Ex Fresen) and leaves of oolong tea (Camellia sinensis) were fermented in kombucha formula. After fermentation, titratable acidity contents and ethanol of kitchen mint, oolong tea, and mixtures of oolong tea and kitchen mint kombucha samples gradually increased with a period of fermentation time. At day 14 of fermentation, phenolic compounds and flavonoids were increased in all kombucha samples. The numbers of acetic acid bacteria and yeast in kombucha had gradually raised during 7-14 days of fermentation. DPPH and ABTS scavenging activities of these kombucha increased over a period of fermentation time and shown the highest antioxidant capacity on day 14 of fermentation. In addition, all kombucha samples exhibited the antioxidant effects by attenuating H2 O2 -induced ROS production, increasing mRNA expression of catalase, glutathione reductase (GRe), and Mn-SOD, and inducing GRe enzymatic activity in HEK-293 cells. Kombucha beverage can be used as the healthy beverages for attenuation of oxidative stress in many diseases.

Keywords: antioxidant activity; antioxidant enzyme; glutathione reductase; kitchen mint; kombucha; oolong tea.

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