Antibacterial and laxative activities of strictinin isolated from Pu'er tea (Camellia sinensis)

Sheng Kuo Hsieh, Jun Rui Xu, Nan Hei Lin, Yue Chiun Li, Guan Heng Chen, Ping Chung Kuo, Wen Ying Chen, Jason T.C. Tzen

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Strictinin, the major phenolic compound in Pu'er teas produced from young leaves and buds of wild trees, was isolated to evaluate its antibacterial and laxative activities. The minimum inhibitory concentrations of strictinin against Propionibacterium acnes and Staphylococcus epidermidis were determined as 250 μM and 2000 μM, respectively, apparently higher than those of several antibiotics commonly used for bacterial infections. The additive and synergistic effects on the inhibitory activities of strictinin combined with other commercial antibiotics were observed in two bacteria tested in this study via the analysis of fractional inhibitory concentrations. Laxative activity was observed on defecation of the rats fed with strictinin. Further analysis showed that the laxative effect of strictinin was presumably caused by accelerating small intestinal transit, instead of enhancing gastric emptying, increasing food intake, or inducing diarrhea in the rats. Taken together with the antiviral activities demonstrated previously, it is suggested that strictinin is one of the active ingredients responsible for the antiviral, antibacterial, and laxative effects of wild Pu'er tea, and has the potential to be developed as a mild natural substitute for antibiotics and laxatives.

Original languageEnglish
Pages (from-to)722-729
Number of pages8
JournalJournal of Food and Drug Analysis
Volume24
Issue number4
DOIs
Publication statusPublished - 2016 Oct 1

Fingerprint

Camellia sinensis
laxatives
Laxatives
purgative properties
Tea
tea
antibiotics
Propionibacterium acnes
gastric emptying
Staphylococcus epidermidis
defecation
rats
minimum inhibitory concentration
Anti-Bacterial Agents
bacterial infections
active ingredients
Antiviral Agents
food intake
phenolic compounds
diarrhea

All Science Journal Classification (ASJC) codes

  • Food Science
  • Pharmacology

Cite this

Hsieh, Sheng Kuo ; Xu, Jun Rui ; Lin, Nan Hei ; Li, Yue Chiun ; Chen, Guan Heng ; Kuo, Ping Chung ; Chen, Wen Ying ; Tzen, Jason T.C. / Antibacterial and laxative activities of strictinin isolated from Pu'er tea (Camellia sinensis). In: Journal of Food and Drug Analysis. 2016 ; Vol. 24, No. 4. pp. 722-729.
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Antibacterial and laxative activities of strictinin isolated from Pu'er tea (Camellia sinensis). / Hsieh, Sheng Kuo; Xu, Jun Rui; Lin, Nan Hei; Li, Yue Chiun; Chen, Guan Heng; Kuo, Ping Chung; Chen, Wen Ying; Tzen, Jason T.C.

In: Journal of Food and Drug Analysis, Vol. 24, No. 4, 01.10.2016, p. 722-729.

Research output: Contribution to journalArticle

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AU - Hsieh, Sheng Kuo

AU - Xu, Jun Rui

AU - Lin, Nan Hei

AU - Li, Yue Chiun

AU - Chen, Guan Heng

AU - Kuo, Ping Chung

AU - Chen, Wen Ying

AU - Tzen, Jason T.C.

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N2 - Strictinin, the major phenolic compound in Pu'er teas produced from young leaves and buds of wild trees, was isolated to evaluate its antibacterial and laxative activities. The minimum inhibitory concentrations of strictinin against Propionibacterium acnes and Staphylococcus epidermidis were determined as 250 μM and 2000 μM, respectively, apparently higher than those of several antibiotics commonly used for bacterial infections. The additive and synergistic effects on the inhibitory activities of strictinin combined with other commercial antibiotics were observed in two bacteria tested in this study via the analysis of fractional inhibitory concentrations. Laxative activity was observed on defecation of the rats fed with strictinin. Further analysis showed that the laxative effect of strictinin was presumably caused by accelerating small intestinal transit, instead of enhancing gastric emptying, increasing food intake, or inducing diarrhea in the rats. Taken together with the antiviral activities demonstrated previously, it is suggested that strictinin is one of the active ingredients responsible for the antiviral, antibacterial, and laxative effects of wild Pu'er tea, and has the potential to be developed as a mild natural substitute for antibiotics and laxatives.

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