• Korean Journal of Pharmacognosy
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• v.50 no.4
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• pp.245-252
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• 2019

This study was initially explored to procure biomaterials capable of inhibiting cancer cell growth from nine Persicaria species (Polygonaceae). The extract of P. nepalensis that was selected from the initial screenings was further fractionated to identify bioactive compounds. The ethyl acetate (EtOAc) fraction was shown to be the most active in the inhibition of cell growth against six cancer cell lines (IC₅₀ value of 3.77-12.87 ㎍/ml). Phytochemical study led to the isolation of two galactolipids of 1,2-di-O-linolenoyl-3-O-β-D-galactospyranosyl-sn-glycerol (1) and 1-O-linolenoyl-3-O-β-D-galactospyranosyl-sn-glycerol (2) from the hexane fraction and three phenylpropanoyl sucroses of lapathoside A (3), vanicoside B (4) and lapathoside C (5) from the EtOAc fraction. These isolated compounds have not been reported from this plant. Compounds 3 and 4 exhibited the effective growth inhibition against a panel of cancer cell lines (IC₅₀ value of 6.90-18.09 μM). In addition, the anti-inflammatory activity was evaluated to determine lipopolysaccharide (LPS)-induced nitric oxide (NO) formation in RAW264.7 mouse macrophage cells. The EtOAc fraction (IC₅₀; 34.14 ㎍/ml) and its constituents, 3 (8.55 μM) and 4 (7.83 μM) were shown to be effective in the inhibition of LPS-induced NO production. Therefore, compounds 3 and 4 were considered to be active constituents for anti-inflammatory and antitumor activity from P. nepalensis.

• Journal of Environmental Science International
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• v.26 no.2
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• pp.249-256
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• 2017

In this study, we evaluated the potential of 70% ethanol extract from Persicaria nepalensis (PNE) as a cosmetic ingredient by primary skin irritation, ocular irritation, and maximization tests for delayed hypersensitivity in New Zealand white rabbits and Hartley guinea pig. Skin safety study was performed to evaluate the potential toxicity of PNE using the primary irritation test. In the primary irritation test, 50% PNE was applied to the skin, and no adverse reactions such as erythema and edema were observed at the intact skin sites. Therefore, PNE was classified as a practically non-irritating material based on a primary irritation index of "0.0.". In the ocular irritation test, the 50% PNE applied did not show any adverse reactions in the different parts of rabbit eyes, including the cornea, iris, and conjunctiva. Thus, PNE was classified as a practically non-irritating material based on an acute ocular irritation index of "0.0.". Skin sensitization was tested by the Guinea Pig Maximization Test (GPMT) and Freund's Complete Adjuvant (FCA) using an intradermal injection of 10% PNE. Edema and erythema were not observed 24 and 48 h after the topical application of PNE in skin sensitization test, which exhibited a sensitization score of "0.0.". Therefore, it can be suggested that P. nepalensis could be used as potential candidates for cosmoceutical ingredients, without any major side effects.