Article Publish Status: FREE
Abstract Title:

Matcha Green Tea Exhibits Bactericidal Activity againstand Inhibits Functional Pneumolysin.

Abstract Source:

Antibiotics (Basel). 2021 Dec 17 ;10(12). Epub 2021 Dec 17. PMID: 34943762

Abstract Author(s):

Karin Sasagawa, Hisanori Domon, Rina Sakagami, Satoru Hirayama, Tomoki Maekawa, Toshihito Isono, Takumi Hiyoshi, Hikaru Tamura, Fumio Takizawa, Yoichi Fukushima, Koichi Tabeta, Yutaka Terao

Article Affiliation:

Karin Sasagawa


is a causative pathogen of several human infectious diseases including community-acquired pneumonia. Pneumolysin (PLY), a pore-forming toxin, plays an important role in the pathogenesis of pneumococcal pneumonia. In recent years, the use of traditional natural substances for prevention has drawn attention because of the increasing antibacterial drug resistance of. According to some studies, green tea exhibits antibacterial and antitoxin activities. The polyphenols, namely the catechins epigallocatechin gallate (EGCG), epigallocatechin (EGC), epicatechin gallate (ECG), and epicatechin (EC) are largely responsible for these activities. Although matcha green tea provides more polyphenols than green tea infusions, its relationship with pneumococcal pneumonia remains unclear. In this study, we found that treatment with 20 mg/mL matcha supernatant exhibited significant antibacterial activity againstregardless of antimicrobial resistance. In addition, the matcha supernatant suppressed PLY-mediated hemolysis and cytolysis by inhibiting PLY oligomerization. Moreover, the matcha supernatant and catechins inhibited PLY-mediated neutrophil death and the release of neutrophil elastase. These findings suggest that matcha green tea reduces the virulence ofin vitro and may be a promising agent for the treatment of pneumococcal infections.

Study Type : In Vitro Study

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