Tannase-converted green tea catechins and their anti-wrinkle activity in humans

Yang Hee Hong, Eun Young Jung, Kwang Soon Shin, Kwang Won Yu, Un Jae Chang, Hyung Joo Suh

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Background: This study was performed to investigate the anti-wrinkle effects of topical applications of green tea extract with high antioxidant activity by tannase treatment. Increases in gallic acid (GA), (-)-epigallocatechin (EGC), and (-)-epicatechin (EC) were observed in the green tea extract after tannase treatment. Objectives: This study was performed to investigate the anti-wrinkle effects of topical applications of green tea extract exhibiting high antioxidant activity after tannase treatment. Methods: Subjects, randomly divided into two groups, received the application of either tannase-converted green tea extract (TGE) or normal green tea extract (NGE) on their crow's feet for 8 weeks. The anti-wrinkle effects were evaluated with two methods: (i) self-assessment; and (ii) average roughness of skin surface (Ra, Rz, and Rt value) using skin replica and Skin-Visiometer SV 600. Results: The scavenging abilities of TGE against radicals were significantly higher compared to NGE. The evaluation of skin wrinkle index values after 8 weeks of treatment showed that reductions of Ra, Rz, and Rt values in the TGE group were significantly greater than in the NGE group, which indicated that tannase treatment improved the anti-wrinkle effects of green tea extract. According to the overall ratings for wrinkle treatment by applying the formulations, most of the TGE group (63.60%) reported marked or moderate improvement in wrinkles compared with only 36.30% of the NGE group. Conclusion: Tannase treatment can improve the antioxidant activity of green tea extract, conferring anti-wrinkle activities. These results suggest that TGE may have beneficial properties as an anti-wrinkle agent.

Original languageEnglish
Pages (from-to)137-143
Number of pages7
JournalJournal of Cosmetic Dermatology
Volume12
Issue number2
DOIs
Publication statusPublished - 2013 Jun 1

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tannase
Catechin
Tea
Human Activities
Skin
Antioxidants

Keywords

  • Anti-wrinkle
  • Catechins
  • Green tea
  • Tannase

ASJC Scopus subject areas

  • Dermatology

Cite this

Tannase-converted green tea catechins and their anti-wrinkle activity in humans. / Hong, Yang Hee; Jung, Eun Young; Shin, Kwang Soon; Yu, Kwang Won; Chang, Un Jae; Suh, Hyung Joo.

In: Journal of Cosmetic Dermatology, Vol. 12, No. 2, 01.06.2013, p. 137-143.

Research output: Contribution to journalArticle

Hong, Yang Hee ; Jung, Eun Young ; Shin, Kwang Soon ; Yu, Kwang Won ; Chang, Un Jae ; Suh, Hyung Joo. / Tannase-converted green tea catechins and their anti-wrinkle activity in humans. In: Journal of Cosmetic Dermatology. 2013 ; Vol. 12, No. 2. pp. 137-143.
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