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Abstract Title:

Combination of white tea and peppermint demonstrated synergistic antibacterial and anti-inflammatory activities.

Abstract Source:

J Sci Food Agric. 2020 Oct 15. Epub 2020 Oct 15. PMID: 33058206

Abstract Author(s):

Xiaoyan Xia, Zhenchuan Lin, Keping Shao, Xude Wang, Jing Xu, Hang Zhai, Hua Wang, Wei Xu, Yuqing Zhao

Article Affiliation:

Xiaoyan Xia

Abstract:

BACKGROUND: White tea, considered to be the oldest form of tea, is becoming a popular beverage for its organoleptic characteristics. Peppermint tea, used as a herbal remedy for centuries, is now also very popular throughout the world as herbal tea. What interested us was that in ancient China, peppermint was used in combination with tea as a detoxification or anti-inflammatory agent. However, there are few reports on the combined use of white tea and peppermint. Therefore, this study aims to investigate the antibacterial and anti-inflammatory activities of white tea in combination with peppermint.

RESULTS: A synergistic inhibitory effect against four bacterial strains, especially against Staphylococcus argenteus, was observed in the combination of white tea and peppermint in vitro. In addition, the combined formula demonstrated a stronger anti-inflammatory effect in vivo than either of the two used alone, which was associated with the decrease of the pro-inflammatory cytokines of interleukin-6 (IL-6), interleukin-1beta (IL-1β), tumor necrosis factor-alpha (TNF-α), cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS). In a further mechanism study, it was found that white tea and peppermint inhibited the phosphorylation of p-IκB-α and mitogen-activated protein kinase (MAPK) at different degrees. Whilethe enhanced anti-inflammatory effect of the combined formula was associated with the combination of NF-κB down-regulation and p-MAPK inhibition.

CONCLUSION: In our study, it was for the first time shown that when white tea was combined with peppermint, the antibacterial and anti-inflammatory effects were enhanced. The results suggested an effective application of white tea in combination with peppermint as a potential antibacterial and anti-inflammatory functional food.© 2020 Society of Chemical Industry.

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