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Articles by In-Seon Lee
Total Records ( 3 ) for In-Seon Lee
  Mi Hee Yu , Hyo Gwon Im , Ji-Won Lee , Mi-Hyang Hwang Bo , Hyun-Jeong Kim , Suk Kyung Kim , Shin Kyo Chung and In-Seon Lee
  This study was performed to investigate the effect of ethanol extract from Saururus chinensis (Lour.) Baill on liver function, plasma lipid composition and antioxidant system with high-fat diet for 4 weeks. Rats were divided into the following five groups; untreated control group (normal), treated with 0.5% SE (normal + 0.5% SE), high-fat group (high-fat), high-fat group treated with 0.1% SE (high-fat + 0.1% SE), or 0.5% SE (high-fat + 0.5% SE). Weight gains showed a tendency to decrease in rat with high-fat + SE. Plasma total cholesterol showed a tendency to decrease with ethanol extract from S. chinensis (Lour.) Baill. LDL-cholesterol contents were lower in ethanol extract group than that of control group. Aspartate amino transferase and alanine amino transferase activities were increased by high-fat diet, and were decreased by 0.5% SE. Lipid peroxide level showed a tendency to increase in high-fat diet group than that of normal group. In ethanol extract from S. chinensis (Lour.) Baill groups, lipid peroxide level decreased significantly and SOD activity was also decreased progressively.

These results demonstrated that the ethanol extract of S. chinensis (Lour.) Baill lowered serum cholesterol levels, tissue lipid contents and accumulation of cholesterol in the rat.
  Ji-Won Lee , Young-Ju Ji , Mi-Hee Yu , Mi-Hyang Hwang Bo , Hwa-Jeong Seo , Sam-Pin Lee and In-Seon Lee
  In the present study, we investigated antimicrobial activity of Glycyrrhiza uralensis against various strains of methicillin-resistant Staphylococcus aureus (MRSA) (KCCM 11812, 40510, 40512). Glycyrrhiza uralensis was extracted by 80% MeOH and fractionated by organic solutions. The extract and fractions showed antimicrobial activity against standard S. aureus as well as MRSA. In the minimum inhibitory concentration test, G. uralensis showed 0.25 mg mL-1 in hexane fraction and 0.10-0.12 mg mL-1 in chloroform fraction. Especially, chloroform fraction showed 2.5 times higher antimicrobial activity than penicillin. Furthermore, chloroform fraction correlated with MRSA gene expression (MecA, MecI, MecRI, FemA). These results suggest that G. uralensis may have potent antimicrobial activity and thus, this medicinal herb can be a suitable phytotherapeutic agent for treating MRSA infections.
  Seun-Ah Yang , Sang-Kyung Jeon , Eun-Jung Lee , Chang-Hyun Shim and In-Seon Lee
  The antioxidant activities and the determined major components of six popular and commercially available herb essential oils, including lavender (Lavendular angustifolia), peppermint (Mentha piperita), rosemary (Rosmarius officinalis), lemon (Citrus limon), grapefruit (Citrus paradise), and frankincense (Boswellia carteri), were compared. The essential oils were analysed by GC-MS and their antioxidant activities were determined by testing free radical-scavenging capacity and lipid peroxidation in the linoleic acid system. The major components of the essential oils of lavender, peppermint, rosemary, lemon, grapefruit, and frankincense were linalyl acetate (28.2%), menthol (33.4%), 1,8-cineole (46.1%), limonene (64.5 and 94.2%), and p-menth-2-en-ol (34.5%), respectively. The highest DPPH radical-scavenging activity was obtained by the lavender essential oil and limonene, with RC50 values of 2.1 ± 0.23% and 2.1 ± 0.04%, respectively. Radical-scavenging activity against the ABTS radical was highest in peppermint essential oil (1.6 ± 0.09). Lavender oil was most effective for inhibiting linoleic acid peroxidation after 10 days.
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