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Inhibition of Rat Lense Aldose Reductase by Flavonoids from Dandelions
So-Youn Mok,이설림,김혜민,이정민,이동구,안영희,Chun-Geon Park,조은주,이상현 한국생약학회 2011 Natural Product Sciences Vol.17 No.2
The purpose of this study was to evaluate the therapeutic potential of naturally occurring aldose reductase (AR) inhibitors isolated from Korean native plants. The MeOH extract and stepwise polarity fractions of dandelions were tested on rat lens AR inhibition in vitro. Of these, the EtOAc fractions from the leaves of dandelions (Traxacum coreanum, T. officinale, and T. ohwianum) exhibited an AR inhibitory activity (IC50 values, 2.37, 1.73 and 2.68 mg/ml, respectively). A chromatography of the EtOAc fraction from the leaves of T. coreanum led to the further isolation of two flavonoids identified as luteolin and luteolin 7-O-glucopyranoside. These compounds exhibited strong AR inhibitory activity, with IC50 values of 0.15 and 1.05 mM, respectively. These results suggested that luteolin is a potent AR inhibitor within dandelions and that it could be a useful lead compound in the development of a novel AR inhibitory agent against diabetic complications.
Screening of aldose reductase inhibitory activity of white-color natural products
So-Youn Mok(목소연),Hyun Cheol Shin(신현철),Sanghyun Lee(이상현) 충남대학교 농업과학연구소 2012 농업과학연구 Vol.39 No.1
The purpose of this study was to evaluate the potential of naturally occurring aldose reductase (AR) inhibitors from white-color natural products (Aruncus dioicus var. kamtschaticus, Chionanthus retusa, Cosmos bipinnatus, Hibiscus syriacus, Hydrangea paniculata, Magnolia denudata, Prunus padus, Robinia pseudo-accacia, Rhododendron mucronulatum for. albiflorum, Spiraea blumei, and Spiraea prunifolia var. simpliciflora). The MeOH extract of white-color natural products were tested on rat lens AR inhibition in vitro. Among them, the MeOH extract of R. mucronulatum for. albiflorum showed highest inhibition on AR (IC50 value, 1.07 ㎍/ml). These results suggested that R. mucronulatum for. albiflorum, a white-color natural product, could be a useful resource in the development of a novel AR inhibitory agent against diabetic complications.
Inhibition of Rat Lense Aldose Reductase by Flavonoids from Dandelions
( So Youn Mok ),( Sul Lim Lee ),( Hye Min Kim ),( Jeong Min Lee ),( Dong Gu Lee ),( Young Hee Ahn ),( Chun Geon Park ),( Eun Ju Cho ),( Sang Hyun Lee ) 부산대학교 김치연구소 2011 김치의 과학과 기술 Vol.14 No.-
The purpose of this study was to evaluate the therapeutic potential of naturally occurring aldose reductase (AR) inhibitors isolated from Korean native plants. The MeOH extract and stepwise polarity fractions of dandelions were tested on rat lens AR inhibition in vitro. Of these, the EtOAc fractions from the leaves of dandelions (Traxacum coreanum, T. officinale, and T. ohwianum) exhibited an AR inhibitory activity (IC50 values, 2.37, 1.73 and 2.68 mg/ml, respectively). A chromatography of the EtOAc fraction from the leaves of T. coreanum led to the further isolation of two flavonoids identified as luteolin and luteolin 7-O-glucopyranoside. These compounds exhibited strong AR inhibitory activity, with IC50 values of 0.15 and 1.05 mM, respectively. These results suggested that luteolin is a potent AR inhibitor within dandelions and that it could be a useful lead compound in the development of a novel AR inhibitory agent against diabetic complications.
Inhibition of Aldose Reductase from Rat Lenses by Methanol Extracts from Korean Folk Plants
김혜민,So-Youn Mok,Jeong Min Lee,조은주,최경,Jajung Ku,Kwang-Woo Park,이상현 한국생약학회 2010 Natural Product Sciences Vol.16 No.4
The inhibition of rat lens aldose reductase (AR) in vitro using methanol extracts from Korean folk plants was investigated. Among them, the extracts of Saussurea grandifolia and Rumex crispus showed highest inhibition of AR. IC50 values of the extracts from S. grandifolia and R. crispus were demonstrated 0.07 and 0.05 mg/ml, respectively. Korean folk plants such as S. grandifolia and R. crispus has a possibility of new natural resources for the inhibition of AR.
Screening of aldose reductase inhibitory activity of white-color natural products
목소연,신현철,이상현,Mok, So-Youn,Shin, Hyun-Cheol,Lee, Sang-Hyun Institute of Agricultural Science 2012 Korean Journal of Agricultural Science Vol.39 No.1
The purpose of this study was to evaluate the potential of naturally occurring aldose reductase (AR) inhibitors from white-color natural products (Aruncus dioicus var. kamtschaticus, Chionanthus retusa, Cosmos bipinnatus, Hibiscus syriacus, Hydrangea paniculata, Magnolia denudata, Prunus padus, Robinia pseudo-accacia, Rhododendron mucronulatum for. albiflorum, Spiraea blumei, and Spiraea prunifolia var. simpliciflora). The MeOH extract of white-color natural products were tested on rat lens AR inhibition in vitro. Among them, the MeOH extract of R. mucronulatum for. albiflorum showed highest inhibition on AR ($IC_{50}$ value, 1.07 ${\mu}g/ml$). These results suggested that R. mucronulatum for. albiflorum, a white-color natural product, could be a useful resource in the development of a novel AR inhibitory agent against diabetic complications.
Determination of hesperidin in mixed tea by HPLC
Saem Han(한샘),So-Youn Mok(목소연),Hye-Min Kim(김혜민),Jeong-Min Lee(이정민),Dong Gu Lee(이동구),Sook-Young Lee(이숙영),Jongkee Kim(김종기),Sun-Ju Kim(김선주),Sanghyun Lee(이상현) 충남대학교 농업과학연구소 2011 농업과학연구 Vol.38 No.2
The content of hesperidin in the mixed tea, which was composed of dried orange peel, laurel leaf, mulberry leaf, silver magnolia leaf, oriental melon tap, cassia seed, and licorice root, was determined by high performance liquid chromatography (HPLC). Hesperidin was quantified by a reverse phase column with gradient solvent system (watcr:acetonitrile = 80:20 to 35:65 for 30 min) and UV/VIS detection (280 ㎚). The How rate was kept constant at 1.0 ㎖/min. The content of hesperidin in the mixed tea was measured in depending on extraction time 1, 2, 3, and 4 min (29.07, 52.39, 52.45, and 88.35 ㎎/g, respectively).