Publications by authors named "Jin-Gyeong Cho"

Unlabelled: Tea is one of the most widely consumed aromatic beverages in the world because of its taste and flavor, as well as due to many potential health beneficial properties. Metabolomics focuses on an in-depth analysis of all metabolites in living organisms. In this study, 29 primary metabolites and 25 secondary metabolites were identified using GC/MS and UPLC-QTOF/MS, respectively.

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Purpose: In traditional Korean medicine, Artemisia apiacea H. (ART) and Scutellaria baicalensis G. (SCU) are combined for the treatment of malaria and other malaria-like diseases.

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UV irradiation triggers the overproduction of matrix metalloproteinases and collagen degradation, which in turn causes increased pigmentation, dryness, and deep wrinkling of the skin. These chronic symptoms are collectively referred to as photoaging. Eucalyptus globulus is an evergreen tree that is widely used in cosmetics because of its antimicrobial activity.

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Radix Scutellariae (RS) has long been used in the treatment of inflammatory and allergic diseases. Its main flavonoids, baicalin (BG) and wogonoside (WG), can be hydrolyzed into their corresponding aglycones, baicalein (B) and wogonin (W). In this study, we developed a safe and effective method of transforming these glycosides using Peclyve PR.

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Background: Foeniculum vulgare Mill (FV) has long been prescribed in traditional medicine due to its antioxidant anti-inflammatory properties. However, little research has been done on the use of FV to alleviate changes in UVB-induced photoaging PURPOSE: This study was to investigate the photoprotective effects and mechanism of FV in vitro and in vivo.

Methods: The anti-photoaging effect of FV was assessed in normal human dermal fibroblasts (NHDFs) in vitro.

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Identification of bitter components from the aerial parts of Pamp. was performed to search for a method to eliminate the bitter taste from products. The aerial parts of were extracted in an aqueous EtOH solution, and the obtained extracts were partitioned into essential-oil, flavonoid-rich, -BuOH, and aqueous fractions.

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Two new pimarane diterpenoids, momilactone D (3) and momilactone E (5), along with three known diterpenoids, momilactone A (1), sandaracopimaradien-3-one (2), and oryzalexin A (4) were isolated from Oryza sativa roots. The chemical structures of the compounds were determined by spectroscopic data analysis. The isolated diterpenoids were evaluated for their ability to inhibit NO production and iNOS mRNA and protein expression in LPS-stimulated RAW264.

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Phytochemical investigation on the florets of Thysanolaena latifolia leads to the isolation of a new compound 6″-O-acetylorientin-2″-O-α-L-rhamnopyranoside (1), named amrisoside and other 34 known compounds. The chemical structures of the compounds were determined from the interpretation of spectroscopic data including NMR, MS, and IR. This is the first report of phytochemical constituents from the monotypic genus Thysanolaena.

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Five phenyl compounds, vanillin (1), methyl trans-ferulate (2), trans-p-coumaric acid methyl ester (3), N-benzoyltryptamine (4), and N-(trans-cinnamoyl)tryptamine (5), were isolated from the roots of Oryza sativa L. and identified on the basis of spectroscopic data. Compounds 3 and 5 showed strong inhibition effect on melanin production in murine B16-F10 melanoma cells and tyrosinase activity.

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Stems of Machilus japonica were extracted with 80% aqueous methanol (MeOH) and the concentrated extract was successively extracted with ethyl acetate (EtOAc), normal butanol (n-BuOH), and water. Six flavonoids were isolated from the EtOAc fraction: (+)-taxifolin, afzelin, (-)-epicatechin, 5,3'-di-O-methyl-(-)-epicatechin, 5,7,3'-tri-O-methyl-(-)-epicatechin, and 5,7-di-O-methyl-3',4'-methylenedioxyflavan-3-ol. The chemical structures were identified using spectroscopic data including NMR, mass spectrometry and infrared spectroscopy.

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Ginseng roots were extracted with aqueous methanol, and extracts were suspended in water and extracted successively with ethyl acetate and n-butanol. Column chromatography using the n-butanol fraction yielded four purified triol ginseng saponins: the ginsenosides Re, Rf, Rg2, and 20-gluco-Rf. The physicochemical, spectroscopic, and chromatographic characteristics of the ginsenosides were measured and compared with reports from the literature.

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The stems of Zea mays L., otherwise known as cornstalks, were extracted with 80 % aqueous MeOH, and the concentrated extract was successively partitioned with ethyl acetate (EtOAc), normal butanol, and water. From the EtOAc fraction, a new lignan along with three known flavonoids, tricin (1), salcolin A (2), and salcolin B (3), were isolated.

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The stem wood of Machilus japonica Siebold & Zucc were extracted with 80 % aqueous MeOH, and the concentrated extract was successively partitioned with ethyl acetate (EtOAc), normal butanol, and water. From the EtOAc fraction, five procyanidins, procyanidin A1 (1), procyanidin A2 (2), procyanidin B7 (3), cinnamtannin B1 (4), and aesculitannin B (5), were isolated. Their chemical structures were identified through spectroscopic data analyses including NMR, MS, and IR.

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The transgenic rice cultivar of Oryza sativa spp. japonica cv. Hwa-Young, C1/R-S transgenic rice (C1/R-S rice), is a flavonoid-rich cultivar of rice.

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Rhus parviflora (Anacardiaceae) is an indigenous medicinal shrub found in South Asia with flavonoid rich edible fruit. This study examined flavonoid derivatives of R. parviflora fruit with CDK5/p25 inhibition activity.

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Nine phenolic compounds, phloracetophenone-4-O-β-D-glucopyranoside (1), p-hydroxybenzoic acid-4-O-β-D-glucopyranoside (2), leonuriside A (3), 3-methoxy-4-hydroxyphenol-1-O-β-D-glucopyranoside (4), cis-p-coumaric acid-4-O-β-D-glucopyranoside (5), trans-p-coumaric acid-4-O-β-D-glucopyranoside (6), trans-p-coumaric acid-9-O-β-D-glucopyranoside (7), (-)-shikimic acid (8) and (-)-methyl shikimate (9), were isolated for the first time from the fruits of Rhus parviflora. Compounds 1, 3-6 and 8 inhibited lipopolysaccharide-stimulated nitric oxide (NO) production and inducible NO synthase expression in RAW 264.7 macrophages with IC50 values of 9.

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Column chromatographic technology was applied to isolate six purified ursane triterpenoids from the calyx of Fragaria ananassa and they were identified on the basis of spectroscopic methods to be ursolic acid (1), pomolic acid (2), 2-oxo-pomolic acid (3), 3-O-acetyl pomolic acid (4), fupenzic acid (5) and euscaphic acid (6). This is the first study in which these compounds have been isolated from the calyx of F. ananassa.

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Phytochemical investigation of the roots of Brassica rapa ssp. campestris led to the isolation of three new carbohydrate derivatives, namely sucrose 3,3',4'-triisovalerate (2), sucrose 6,3',4'-triisovalerate (3), and ethanone-1-C-β-d-glucopyranoside (3,7-anhydro-1-deoxy-d-glycero-d-gulo-2-octulose, 6), along with four known carbohydrate derivatives, 2,6,3',4'-tetraisovalerate (1), ethyl β-d-glucopyranoside (4), n-butyl β-d-fructofuranoside (5), and n-pentyl β-d-fructofuranoside (7), which were initially isolated from plants of the Brassica genus. Structures of the isolated compounds were established by spectroscopic analyses, including UV, IR, MS, and NMR.

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Brassica rapa ssp. campestris (Brassicaceae) is a conical, deep purple, edible root vegetable commonly known as a turnip. We initiated phytochemical and pharmacological studies to search for biological active compounds from the roots of B.

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Ethnopharmacological Relevance: Artemisia leaves have long been used for the treatment of gynecological disorders, including infertility and dysmenorrhea, which can be commonly caused by endometriosis. In the present study, we investigated the effect of Artemisia princeps extract (APE) on the cell growth and apoptosis of human endometriotic cells.

Materials And Methods: MTT assays and FACS analysis using PI and Annexin staining were performed to study cell viability, cell cycle progression, and apoptosis.

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Ethnopharmacological Relevance: Rhus parviflora is referred as 'Tintidikah' in traditional medicinal system of south Asia (Ayurveda). It is used in treatment of Vāta vikāra, a condition related to neurological complications as well as cure for stomach disorders.

Materials And Methods: Dried and powdered fruits of R.

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Ethnopharmacological Relevance: Artemisia princeps Pampanini is widely used in Eastern traditional medicine for the treatment of circulatory disorders, such as, dysmenorrhea, hematuria, hemorrhoids, and inflammation, and is also used to treat chronic conditions, such as, cancers, ulcers, and digestive disorders.

Aim Of The Study: The purpose of this study is to investigate the effect of a standardized flavonoid-rich fraction of Artemisia princeps Pampanini cv. Sajabal (FRAP) on the induction of apoptosis and the molecular mechanism involved in human cervical cancer HeLa cells.

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The fruits of Capsicum annuum were extracted using 80% aqueous MeOH, and fractionated using EtOAc and water. Repeated column chromatography using silica gel, octadecyl silica gel, and Sephadex LH-20 for the EtOAc fraction led to the isolation of a new lignan glycoside and a known one, icariside E(5). From the results of spectroscopic data, including EIMS, FABMS, UV, IR, (1)H and (13)C-NMR, DEPT, and 2D-NMR (COSY, HSQC, HMBC), the chemical structure of the new lignan glycoside was determined as (8R)-isodehydrodiconiferyl alcohol-4'-O-(6''-vanilloyl)-beta-D-glucopyranoside named vanilloylicariside E(5).

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Repeated silica gel and octadecyl silica gel (ODS) column chromatography of the aerial parts of Artemisia princeps PAMPANINI (Sajabalssuk) led to the isolation of a new sesquiterpenoid, 3-((S)-2-methylbutyryloxy)-costu-1(10),4(5)-dien-12,6 alpha-olide (2), along with two previously reported sesquiterpenoids: 8 alpha-angeloyloxy-3beta,4 beta-epoxy-6 beta H,7 alpha H,8 beta H-guaia-1(10),11(13)-dien-12,6 alpha-olide (1, carlaolide B) and 3beta,4 beta-epoxy-8 alpha-isobutyryloxy-6 beta H,7 alpha H,8 beta H-guaia-1(10),11(13)-dien-12,6 alpha-olide (3, carlaolide A). The structure of compound 2 was elucidated by spectroscopic data analysis, including one dimensional (1D) and two dimensional (2D) nuclear magnetic resonance (NMR) experiments. Of the isolates, compound 2 exhibited potent cytotoxicity against human cervix adenocarcinoma cells and induced apoptosis.

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