Effect of Cold Extract of Green Tea (Camellia sinensis L.) on Salivary Secretory IgA Levels in Habitual Green Tea Drinker: A Preliminary Study

Catechins, one of the main components in green tea extract, have antioxidative activity and immunomodulating activities, and play an important role in reducing the risk of disease. The most abundant catechins in a green tea extract are epigallocatechin gallate (EGCG) and epigallocatechin (EGC), and...

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Published inChagyo Kenkyu Hokoku (Tea Research Journal) Vol. 2012; no. 113; pp. 113_71 - 113_76
Main Authors Monobe, Manami, Ema, Kaori, Tokuda, Yoshiko, Maeda-Yamamoto, Mari
Format Journal Article
LanguageEnglish
Published Japanese Society of Tea Science and Technology 30.06.2012
Subjects
cold extract
green tea (Camellia sinensis L.)
secretory immunoglobulin A
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Summary:Catechins, one of the main components in green tea extract, have antioxidative activity and immunomodulating activities, and play an important role in reducing the risk of disease. The most abundant catechins in a green tea extract are epigallocatechin gallate (EGCG) and epigallocatechin (EGC), and the EGCG/EGC ratio in a green tea extract was affected by the extraction temperature. We found that the cold water extract or the catechin mixture with a high EGC ratio induced greater immunoglobulin A (IgA) production by murine Peyer's patch (PP) cells. Here, we investigated the effect of cold water extract of green tea on salivaly sIgA levels in habitual green tea (hot water extract) drinker.
ISSN:0366-6190
1883-941X
DOI:10.5979/cha.2012.113_71