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Molecules 2018, 23(7), 1810; https://doi.org/10.3390/molecules23071810

Antioxidation and Melanogenesis Inhibition of Various Dendrobium tosaense Extracts

1
Department of Applied Cosmetology, Hung-Kuang University, Taichung 43302, Taiwan
2
Bachelor Program in Interdisciplinary Studies, College of Future, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan
3
Department of Plant Industry, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
4
Ying Li Biotech Co., Ltd., Taichung 40342, Taiwan
5
Department of Chemical Engineering, National United University, Miaoli 36003, Taiwan
*
Author to whom correspondence should be addressed.
Received: 3 June 2018 / Revised: 17 July 2018 / Accepted: 18 July 2018 / Published: 21 July 2018
(This article belongs to the Special Issue Antioxidants Chemistry and Applications)
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Abstract

This study investigated the polyphenol content, antioxidant activity, and inhibition ability of mushroom tyrosinase and melanogenesis of Dendrobium tosaense (DT) extract. Ground DT was extracted using deionized water (W) or 50% ethanol (50E) at room temperature (RT) or 50 °C (50T) for 20 min. The 50T + 50E extract exhibited the highest total phenol content 47.0 ± 4.0 mg gallic acid equivalent/g DT extract, the highest level of 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) free-radical scavenging 66.0 ± 3.0 mg Trolox equivalent/g DT extract, and the highest reducing power 12.00 ± 0.50 mg vitamin C equivalent/g DT extract. The RT + W extract had the highest total flavonoid content 110.0 ± 3.0 mg quercetin equivalent/g DT extract. The RT + 50E extract had the lowest half maximal inhibitory concentration 1.30 ± 0.00 mg/mL for 2,2-diphenyl-1-picrylhydrazyl free-radical scavenging, and the lowest half maximal inhibitory concentration 6.40 ± 0.30 mg/mL for mushroom tyrosinase inhibition activity. DT extracts, especially RT + W and 50T + W, exhibited potent inhibitory effects on melanogenesis of B16/F10 cells. These results demonstrated the application potential of DT extract for skincare. View Full-Text
Keywords: Dendrobium tosaense; polyphenol; antioxidation; mushroom tyrosinase; B16F10; melanogenesis Dendrobium tosaense; polyphenol; antioxidation; mushroom tyrosinase; B16F10; melanogenesis
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Chan, C.-F.; Wu, C.-T.; Huang, W.-Y.; Lin, W.-S.; Wu, H.-W.; Huang, T.-K.; Chang, M.-Y.; Lin, Y.-S. Antioxidation and Melanogenesis Inhibition of Various Dendrobium tosaense Extracts. Molecules 2018, 23, 1810.

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