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Tannase-converted green tea catechins and their anti-wrinkle activity in humans.
J Cosmet Dermatol. 2013 Jun; 12(2):137-43.JC

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 (R(a), R(z), and R(t) 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 R(a), R(z), and R(t) 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.

Authors+Show Affiliations

Department of Food and Nutrition, Korea University, Seoul, Korea.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

23725307

Citation

Hong, Yang-Hee, et al. "Tannase-converted Green Tea Catechins and Their Anti-wrinkle Activity in Humans." Journal of Cosmetic Dermatology, vol. 12, no. 2, 2013, pp. 137-43.
Hong YH, Jung EY, Shin KS, et al. Tannase-converted green tea catechins and their anti-wrinkle activity in humans. J Cosmet Dermatol. 2013;12(2):137-43.
Hong, Y. H., Jung, E. Y., Shin, K. S., Yu, K. W., Chang, U. J., & Suh, H. J. (2013). Tannase-converted green tea catechins and their anti-wrinkle activity in humans. Journal of Cosmetic Dermatology, 12(2), 137-43. https://doi.org/10.1111/jocd.12038
Hong YH, et al. Tannase-converted Green Tea Catechins and Their Anti-wrinkle Activity in Humans. J Cosmet Dermatol. 2013;12(2):137-43. PubMed PMID: 23725307.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Tannase-converted green tea catechins and their anti-wrinkle activity in humans. AU - Hong,Yang-Hee, AU - Jung,Eun Young, AU - Shin,Kwang-Soon, AU - Yu,Kwang-Won, AU - Chang,Un Jae, AU - Suh,Hyung Joo, PY - 2013/01/15/accepted PY - 2013/6/4/entrez PY - 2013/6/4/pubmed PY - 2014/2/15/medline SP - 137 EP - 43 JF - Journal of cosmetic dermatology JO - J Cosmet Dermatol VL - 12 IS - 2 N2 - 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 (R(a), R(z), and R(t) 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 R(a), R(z), and R(t) 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. SN - 1473-2165 UR - https://www.unboundmedicine.com/medline/citation/23725307/Tannase_converted_green_tea_catechins_and_their_anti_wrinkle_activity_in_humans_ L2 - https://doi.org/10.1111/jocd.12038 DB - PRIME DP - Unbound Medicine ER -