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Title: In vitro Biological Activities of the Anti-aging Potential of Dimocarpus longan Leaf Extracts
Authors: Pimjai Doungsaard
Sunee Chansakaow
Jakkapan Sirithunyalug
Lue Shang-Chian
Lin Wei-Chao
Liang Chia-Hua
Lee Kuan-Ha
Pimporn Leelapornpisid
Keywords: Longan leaves
Antioxidant activity
Anti-hyaluronidase activity
Anti-collagenase activity
Inhibition of MMP-2 and MMP-9 assay
Issue Date: 2020
Publisher: Chiang Mai University
Citation: Chiang Mai University (CMU) Journal of Natural Sciences 19,2 (Apr-Jun 2020), p.235-251
Abstract: The longan (Dimocarpus longan Lour.) leaves, which are the underutilized part of trimming longan trees to increase their fruit productivity, were of interest in this study. They have been reported to contain phytochemical components which might be used for anti-aging purposes. In this study, longan leaves were extracted using two different solvents including 95% ethanol and 50% ethanol, named ethanolic extract (ET) and hydroethanolic extract (HE), respectively. The extracts were investigated for antioxidation properties, inhibition of hyaluronidase, collagenase, MMP-2 and MMP-9 together with the determination of their total phenolic and flavonoid content. Additionally, HPLC-fingerprinting of the extract was performed. The results revealed that HE had a higher yield with the remarkable property of superior in vitro biological activity compared with ET. HE showed radical scavenging activity on DPPH and hydrogen peroxide with IC50 of 30.03 ± 7.64 and 71.40 ± 15.30 µg/ml, respectively. Moreover, it showed inhibition of lipid peroxidation with IC50 of 537.01 ± 42.32 µg/ml. For inhibition against hyaluronidase and collagenase, HE was detected with IC50 of 234.80 ± 21.52 and 314.44 ± 62.14 µg/ml, respectively. The extract also demonstrated MMP-2 and MMP-9 inhibition, which is more potent than gallic acid as determined by zymography at 1.0 mg/ml. In conclusion, hydroethanolic extract (HE) of longan leaves presented high potential as in vitro antioxidant and inhibitor of enzymatic activities. It might be a promising approach to the further development of anti-aging products.
Description: Chiang Mai University (CMU) Journal of Natural Sciences is dedicated to the publication of original research in Sciences & Technology and the Health Sciences. Submissions are welcomed from CMU, as well as other Thai and foreign institutions. All submissions must be original research not previously published or simultaneously submitted for publication. Manuscripts are peer reviewed using the double -blinded review system by at least 2 reviewers before acceptance. The CMU Journal of Natural Sciences is published four times a year, in January, April, July and October.
ISSN: 2465-4337
Appears in Collections:CMUL: Journal Articles

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