• Korean Journal of Plant Resources
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• v.22 no.2
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• pp.145-151
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• 2009

This study was performed to investigate the antioxidant activities and the whitening effect of mulberry (Morus alba L.) root bark extracts. The antioxidant activities of water and 70% ethanol extracts of mulberry root bark were 65.8% and 87.0% in the DPPH assay at $1,000\;{\mu}g/ml$ ; 89.3% and 77.1% in the ABTS assay at $1,000\;{\mu}g/ml$. Xanthine oxidase inhibition of water and 70% ethanol extracts were 100% and 96.2% at $1,000\;{\mu}g/ml$. Nitric oxide radical inhibition of water and 70% ethanol extracts showed 43.5% and 53.0% at $500\;{\mu}g/ml$, and it was similar to the BHA effect(43.8%). Tyrosinase inhibitory activities of water and 70% ethanol extracts were 79.6% and 93.5% at $1,000\;{\mu}g/ml$. These results confirm that mulberry root bark has the great potential to be a cosmeceutical ingredient with a natural antioxidant and a skin-whitening effect.

• Fisheries and Aquatic Sciences
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• v.17 no.4
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• pp.421-425
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• 2014

The antioxidant and cholinesterase inhibitory activities of the acetone and dichloromethane ($CH_2Cl_2$) extracts of the by-products (heads, shells, and tails) of Pandalus borealis, Pandalus hypsinotus, and Pandalopsis japonica belonging to the family Pandalidae were investigated and their bioactivities were compared. The antioxidant and cholinesterase inhibitory activities of the organic solvent extracts of three shrimp by-products were evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2'-Azino-bis[3-ethylbenzothiazoline-6-sulfonic acid] ($ABTS^+$) radical scavenging activities, reducing power and xanthine oxidase (XO) inhibitory activity assays and Ellman's colorimetric method. The extracts of P. hypsinotus exhibited the highest antioxidant and cholinesterase inhibitory activities. The acetone extracts showed more potent activities toward antioxidant and cholinesterase inhibition compared with the $CH_2Cl_2$ extracts. Furthermore, the total carotenoid contents of the acetone extracts were higher than those of the $CH_2Cl_2$ extracts. Thus, the carotenoid contents may affect antioxidant and cholinesterase inhibition. Our results suggest that the shrimp by-products could act as a nutraceutical agent to prevent oxidative stress and Alzheimer's disease.

• Journal of the Korean Society of Food Science and Nutrition
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• v.43 no.11
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• pp.1701-1708
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• 2014

Phenolic compounds, physiological properties, and digestive enzyme inhibitory effect of 70% ethanol extracts from Aster scaber with different extraction methods (stirrer extraction, SE; reflux extraction, RE; autoclave extraction, AE; low temperature high pressure extraction, LTPE; ultrasonification extraction, USE) were investigated. Total polyphenols and flavonoids contents in LTPE were significantly higher than those of other extracts. The amount of substances related to cynarin (1,3-O-dicaffeoylquinic acid) was highest in USE (34.34 mg/g), followed by LTPE (33.83 mg/g), RE (32.27 mg/g), AE (25.40 mg/g), and SE (18.17 mg/g). Chlorogenic acid (5-O-caffeoylquinic acid) and astragalin (kaempferol-3-O-glucopyranoside) were highest in AE and LTPE, respectively. Xanthine oxidase, angiotensin- I converting enzyme, 3-hydroxy-3-methylglutaryl coenzyme A reductase and acetylcholin esterase inhibitory activities of LTPE and USE at a concentration of 50 mg% (w/v) were somewhat higher than those of other extracts. The ${\alpha}$-amylase, ${\alpha}$-glucosidase, trypsin and lipase activities showed the same tendency as physiological properties (concentration of 500 mg%, w/v). Additionally, there was significantly higher or slightly lower inhibitory activity compared to the control group. These results suggest that extracts from Aster scaber have potential to act as functional materials, and LTPE and USE are superior for the enhancement of biological activity.

• YAKHAK HOEJI
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• v.44 no.1
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• pp.22-28
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• 2000

The extracts of Euphoria longan, Ziryphus jujuba, Thuja orientalis, Polygala tenuifolia, Acorus gramineus, Cyperus rotundus, Poria cocos, Uncaria rhynchophylla, and Albizzia julibrissin, which have been used as sedative drugs in Korean folk medicine, were evaluated for their effects on neurotransmission and antioxidative system in vitro. Among the tested drugs, Acorus gramineus showed most inhibitory activities on monoamine oxidase, xanthine oxidase, aldehyde oxidase, and lipid peroxidation and Uncaria rhynchophylla also inhibited most effectively GABA transaminase and DPPH radical.

• Korean Journal of Pharmacognosy
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• v.48 no.3
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• pp.195-201
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• 2017

To develop new therapy for prevention and treatment of hair loss is very important according to increase of the number of hair loss people. The aim of this study was to investigate the hair growth promoting effects of pectin lyase-modified red ginseng extract (GS-E3D). We examined antioxidant and anti-inflammatory effects, human hair dermal papilla cells (HHDPC) proliferation, and testoterone-induced $5{\alpha}$-reductase inhibitory effects. GS-E3D show not only 1,1-diphenyl-2-picryhydrazyl (DPPH) radical scavenging activity and xanthine oxidase inhibitory effects as an anti-oxidant property, but also lip-oxygenase and hyaluronidase inhibitory effects as an anti-inflammatory property. Human hair dermal papilla cells proliferation by GS-E3D was higher than those of minoxidil or finasteride, using the positive controls. Moreover, GS-E3D exhibited $5{\alpha}$-reductase inhibitory activities after stimulating by testoterone. The present results indicate that GS-E3D has a potential to be as an hair growth promoting agent for cosmetic materials.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.57 no.3
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• pp.209-215
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• 2024

Ishige foliacea belongs to class Phaeophyceae and family Ishigeaceae. This study investigated the physiological activities of the Korean marine algae I. foliacea. Its solvent extracts were prepared with 70% ethanol, 80% methanol, and distilled water. The ethanol and methanol extracts had higher α-glucosidase (half-maximal inhibitory concentration, IC₅₀: 0.67-0.73 mg/mL), xanthine oxidase (IC₅₀: 0.25-0.28 mg/mL), and angiotensin-converting enzyme (IC₅₀: 25.29-38.28 ㎍/mL) inhibitory activities than those of the water extract. The ethanol and methanol extracts possessed high acetylcholinesterase inhibitory activity (IC₅₀: 0.78c0.97 mg/mL). Conversely, the water extract exhibited the highest β-secretase inhibitory activity (IC₅₀: 0.48 mg/mL). These results indicate that I. foliacea may be useful as a functional substance in food and pharmaceuticals with anti-diabetic, anti-gout, anti-hypertension, and anti-dementia properties.

• The Korea Journal of Herbology
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• v.21 no.2
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• pp.95-101
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• 2006

Objectives : This study aimed to establish cosmeceutical activities of Perilla frutescens var. acuta. Methods : Folium Perillae, which had been extracted, concentrated, and freeze drying with water and ethanol, have been used for the experiment. The effects on electronic donating ability, SOD-like activity, xanthine oxidase inhibition, whitening effect have been investigated in the cosmeceutical activity measurement of function experiment. Results : Both water and ethanol extracts of Perilla frutescens var. acuta showed relatively high electron donating ability of more than 70% at over 500ppm. Also, SOD like activity increased in a dose dependent matter of more than 80% at 5,000ppm, while tyrosinase showed insufficient inhibitory rate. Xanthine oxidase showed a meaningful inhibitory effect of 72.4% in water extract and 55.3% at 1,000ppm in ethanol extract. The addition of $Fe^{2+}ion\;and\;Cu^{2+}ion$ showed relatively high oxidizing inhibitory effect of 57% and 41%, respectively, at 500ppm in water extract and, when $Fe^{2+}$ ion was added in ethanol extract, the effect of 64% at 1,000ppm was achieved. Also, higher oxidizing inhibitory effect was shown against $Fe^{2+}$ rather than $Cu^{2+}$ in both water and ethanol extracts. For human cancer cells, relatively high growth inhibition ability was shown against melanoma G361 in both water and ethanol extracts. Conclusion : From the above results, it was confirmed that Perilla frutescens var. acuta could be used in functional cosmetics.

• KSBB Journal
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• v.23 no.1
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• pp.77-82
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• 2008

We investigated several biological activities using the ethanol extract and its fractions from Pimpinella komarovii leaves to evaluate the usefulness of its extract as a functional biomaterial. The ethanol extract showed antioxidant activities, such as DPPH scavenging activity $(IC_{50}=231.8{\mu}g/m{\ell})$. superoxide scavenging activity $(IC_{50}=23.6{\mu}g/m{\ell})$, and xanthine oxidase inhibitory activity $(IC_{50}=587.8{\mu}g/m{\ell})$. Its EtOAc fraction showed the strongest antioxidant activities among several fractions. The inhibitory effect of ethanol extract on tyrosinase activity was higher than water fraction. When $50{\mu}g/m{\ell}$ of EtOAc fraction was applied, the inhibition ratio of tyrosinase activity was much higher (42%) than that of melasolv. The EtOAc fraction also showed higher inhibitory effect on melanogenesis in Melan-a cells. The n-hexane and EtOAc fractions dose-dependently inhibited the NO production in a RAW 264.7 cells. These results suggest that extract of Pimpinella komarovii could be used as functional biomaterial in developing a skin whitening agent having the antioxidant activity.

• Journal of the Korean Applied Science and Technology
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• v.26 no.2
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• pp.110-116
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• 2009

In an attempt to find natural sources of antioxidants and whitening agents, Comparisons of the antioxidative and tyrosinase inhibitory activities of various ethanol extracts of Astragali Radix, Atractylodis Rhizoma Alba and Acanthopanacis Cortex were carried out. Comparison of the four ethanol extracts revealed that, Astragali Radix had the highest electron-donating ability(72.5%) and the highest SOD-like ability(26.1%). The xanthine oxidase experiment exhibited a hindrance effect of 88.5% in Atractylodis Rhizoma Alba, 81.1% in Acanthopanacis Cortex, 75.8% in Astragali Radix. A tyrosinase inhibitory activity assay was conducted to evaluate the whitening effects of the extracts, The tyrosinase inhibitory activity was 42.1% in the Acanthopanacis Cortex, 37.2% in the Atractylodis Rhizoma Alba, 6.0% in the Astragali Radix. Based on these results, we suggest that the ethanol extracts of Astragali Radix, Atractylodis Rhizoma Alba and Acanthopanacis Cortex can be used as food and cosmetic ingredients.

• Proceedings of the Korean Society of Applied Pharmacology
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• 2003.11a
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• pp.102-102
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• 2003

The inhibitors of prostaglandin biosynthesis and nitric oxide production by corresponding inducible isozyme have been considered as potential anti-inflammatory and cancer chemopreventive agents. In our continuous search for cancer chemopreventive agents from natural products, we have evaluated the inhibitory potential of PGE$_2$and NO production in lipopolysaccharide (LPS)-induced mouse macrophage RAW264.7 cells. As a result, pinosylvin (3,5-dihydroxy-trans-stilbene), a stilbenoid, mainly found from the heartwood and leaves of the Pinus sylvestris, showed potential inhibitory activity of LPS-induced PGE$_2$and NO production in a dose-dependent manner. Pinosylvin also suppressed the LPS-induced iNOS protein expression. Further study revealed that pinosylvin exhibited antioxidant activity by the DPPH free radical scavenging potential and inhibitory effect of xanthine oxidase activity. In addition, pinosylvin inhibited COX -2 overexpressed human colon cancer cell (HT-29) growth in a time- and dose-dependent manner. These findings suggest that pinosylvin might be a promising candidate for developing cancer chemopreventive agent.