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Yang, Seun-Ah,Jung, Yeon-Seop,Lee, Seung-Jin,Park, Seung-Chun,Kim, Min-Ju,Lee, Eun-Ju,Byun, Hae-Jung,Jhee, Kwang-Hwan,Lee, Sam-Pin Elsevier 2014 Food and chemical toxicology Vol.67 No.-
<P>Dropwort (Oenanthe javanica) has been used for many years for the treatment of inflammatory conditions, including hepatitis. We investigated the protective effects of fermented field water-dropwort extract (FDE) on tert-butyl hydroperoxide (t-BHP)-induced hepatotoxicity in HepG2 cells and carbon tetrachloride (CCl4)-induced liver damage in rats. Pretreatment with FDE prior to the t-BHP treatment of HepG2 cells inhibited cell death and lactate dehydrogenase (LDH) leakage in a dose-dependent manner. In addition FDE significantly prevented the increase of hepatic enzyme markers (ALT, AST) in vivo. Moreover, FDE administration for 7 days significantly affected CYP2E1, CYP4A2, and PPARγ gene expressions. CYP2E1 and CYP4A2 gene expression in the liver, increased 2 and 22-fold by CCl4 administration, respectively, was attenuated to normal levels by pretreatment with FDE. PPARγ gene expression, completely blocked by CCl4 treatment, was increased by FDE pretreatment compared to normal control group. Histopathological examination of the livers also revealed that FDE reduced the incidence of liver lesions. Caffeic acid and chlorogenic acid were identified as major constituents of FDE. These results demonstrate the protective effects of FDE against hepatocytotoxicity induced by CCl4 and t-BHP in rats and HepG2 cells, thus indicating the potential of FDE as a therapeutic for acute liver diseases.</P>
Yang, Seun-Ah,Jeon, Sang-Kyung,Lee, Eun-Jung,Shim, Chang-Hyun,Lee, In-Seon Taylor Francis 2010 Natural product research Vol.24 No.2
<P> 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.</P>
Volatile Compounds and Antiproliferative Effects of Dendropanax morbifera on HepG2 Cells
Seun-Ah Yang(양선아),Coralia V. Garcia(코랄리아 가르시아),Ji-Won Lee(이지원) 한국생명과학회 2017 생명과학회지 Vol.27 No.5
황칠나무(Dendropanax morbifera Lev.)는 황금빛의 수액과 약리효과로 한국에서 알려져 있으며, 잎 및 줄기 추출물의 다양한 효능은 피부질환, 편두통, 월경통, 근육통 및 전염성 질환 등의 질병을 개선하는 약리 성분을 공급하는 우수한 공급원이 될 수 있는 것을 시사한다. 그러나, 황칠나무 추출물의 효능에 관해서는 다양한 연구가 보고되어 있으나, 부위별 휘발성 성분의 조성에 대한 보고는 전무한 상황이다. 따라서, 본 연구는 황칠나무의 잎, 줄기 및 수액의 주요 휘발성 성분을 규명하기 위하여, 유기용매 및 초임계유체추출법을 이용한 추출물을 가스크로마토그래피-질량분석법으로 분석하였다. 잎 추출물에서는 15가지 화합물이 검출되었으며, 줄기 및 수액에는 각각 29가지 및 3가지 성분이 확인되었다. 또한 용매와 초임계유체추출법을 사용하여 얻은 휘발성 성분의 프로파일은 다르게 나타났다. 잎의 용매 추출물과 줄기의 초임계유체 추출물에서는 에스테르와 방향족 탄화수소가, 잎의 초임계유체 추출물 및 줄기의 초임계유체 추출물에는 테르페노이드가 주요 성분으로 나타났다. 한편, limonene (96.3%), α-pinene, 그리고 β-myrcene은 수액 용매 추출물의 휘발성 성분으로 확인되었다. 잎 및 줄기의 용매 추출물의 암세포 증식 억제 효과를 평가한 결과, 잎의 용매 추출물이 HepG2 세포의 증식을 유의적으로 감소시키는 것으로 나타났다. Dendropanax morbifera Lev. is known in Korea for its golden sap and medicinal properties. The many biological activities of the leaf and stem extracts suggest that this tree could be a valuable source of medicinal compounds for the treatment of various ailments such as dermatitis, migraines, dysmenorrhea, muscle pain, and infectious diseases. However, there is little information on the composition and biological activity of the volatile fraction of D. morbifera. Therefore, in this study, the volatile compounds in leaves, stems, and sap of D. morbifera were isolated using solvent and supercritical fluid extraction (SFE), and analyzed by gas chromatography/mass spectrometry to reveal their chemical composition and identify potential compounds of interest. Fifteen compounds were identified in the leaf extracts, whereas 29 and 3 compounds were identified in the stem and sap extracts, respectively. The volatile profiles obtained using solvent and SFE differed. Esters and aromatic hydrocarbons predominated in the solvent extract of leaves and SFE extract of stems, whereas the solvent extract of stems and SFE extract of leaves contained terpenoids. Limonene, α-pinene, and β-myrcene were identified in the volatile extract of sap, with limonene representing 96.30% of the total peak area. In addition, the antiproliferative effects of the solvent extracts of leaves and stems were evaluated, revealing that these solvent extracts were particularly effective in decreasing the proliferation of HepG2 cells.
Bioactivity and Chemical Composition of the Essential oil of Tea Tree (Melaleuca alternifolia)
Seun-Ah Yang(양선아),Sang-Kyung Jeon(전상경),Eun-Jung Lee(이은정),Nam-Kyung Im(임남경),Ji-Young Jung(정지영),In-Seon Lee(이인선) 한국생명과학회 2008 생명과학회지 Vol.18 No.12
티트리 에센셜 오일은 호주 원주민들의 전통적인 피부 소독제나 치료제로 널리 사용되어 왔으며, 항균효과와 주요성분 등 많은 보고가 있으나 추출 방법이나 사용 부위 등에 따라 효능의 차이를 보인다. 본 연구에서는 아로마테라피 등에 현재 많이 이용되고 있는 시판 티트리 오일의 성분과 효능을 평가하여, 다른 에센셜 오일과의 비교 이용을 용이하게 하고자 하였다. 티트리 오일의 주요성분은 GC-MS 분석에 의하여 β-terpinene (20.87%), α-pinene (17.60%), p-cymene (11.23%), 3-carene (10.40%), trans-anethole (8.47%), limonene (4.65%)으로 밝혀졌으며, 5% 이하의 농도에서 3시간 미만까지는 피부세포에 독성이 없었다. 오일의 라디컬 소거능을 알아본 결과, DPPH와 ABTS의 양라디컬에 대하여 강한 소거능을 나타내어 강한 항산화능을 시사했다. 또한, 오일의 direct contact와 vapor-phase의 항균활성을 disc diffusion법으로 스크리닝 한 결과, direct contact 활성의 경우 그람음성균에 대하여 높은 활성을 나타내었으며, vapor는 S. aureus에 대하여 강한 효과를 나타내었다. 본 연구에서 실제 많이 사용되는 티트리 오일의 성분과 생물활성을 측정함으로써 허브 오일들의 정확한 선택과 활용을 위한 기본적인 결과를 얻었다. The essential oil of tea tree (Melaleuca alternifolia) is widely used in traditional Australian medicine for skin lesions and infected injuries. In the present study, we investigated the chemical composition, cytotoxicity and its biological activities. The composition of the oil was analyzed by GC-MS. β-Terpinene (20.87%), α-pinene (17.60%), p-cymene (11.23%), 3-carene (10.40%), trans-anethole (8.47%) and limonene (4.65%) were the major components in the oil. The results tested by MTT assay indicated that the oil showed no cytotoxic effect, at concentrations up to 5%, for less than 3h. The antiradical capacity was evaluated by measuring the scavenging activity of the essential oil on the 2,20-diphenylpicrylhydrazyl (DPPH) and 2,2'-azino-bis 3-ethyl benzothiazoline-6-sulfonic acid (ABTS) radicals. The oil was able to reduce the both radicals dose-dependently, and the concentration required for 50% reduction (RC??) against ABTS radicals (1.6±0.02%) was slightly lower than DPPH radicals (2.6±0.29%). The direct contact and vapor-phase antibacterial activity of the oil were also evaluated using disc diffusion method against Staphylococcus aureus, Streptococcus mutans, Listeria monocytogenes, Acinetobacter baumannii, Escherichia coli, and Vibrio parahaemolyticus. All the Gram-negative bacterial strains tested showed more sensibility to the oil than the Gram-positive strains when compare to the effect of gentamycin. On the other hand, the vapor phase of the essential oil against S. aureus exhibited strongest inhibitory effect.
Radical Scavenging Activity of the Essential Oil of Silver Fir ( <i>Abies alba</i> )
Yang, Seun-Ah,Jeon, Sang-Kyung,Lee, Eun-Jung,Im, Nam-Kyung,Jhee, Kwang-Hwan,Lee, Sam-Pin,Lee, In-Seon the Society for Free Radical Research Japan 2009 Journal of clinical biochemistry and nutrition Vol.44 No.3
<P>The essential oil of silver fir (<I>Abies alba</I>) is known to help respiratory system and have easing and soothing effect for muscle. In the present study, we investigated the chemical composition, cytotoxicity and its biological activities of silver fir (<I>Abies alba</I>) essential oil. The composition of the oil was analyzed by GC-MS and bornyl acetate (30.31%), camphene (19.81%), 3-carene (13.85%), tricyclene (12.90%), dl-limonene (7.50%), α-pinene (2.87%), caryophyllene (2.18%), β-phellandrene (2.13%), borneol (1.74%), bicyclo[2.2.1]hept-2-ene,2,3-dimethyl (1.64%) and α-terpinene (1.24%) were the major components in the oil. The results tested by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay indicated that the oil showed no cytotoxic effect, at concentrations of 1 and 5%, for as long as 24 and 3 h, respectively. The antiradical capacity was evaluated by measuring the scavenging activity of the essential oil on the 2,20-diphenylpicrylhydrazyl (DPPH) and 2,2'-azino-bis 3-ethyl benzothiazoline-6-sulfonic acid (ABTS) radicals. The oil was able to reduce the both radicals dose-dependently, and the concentration required for 50% reduction (RC<SUB>50</SUB>) against DPPH radicals (2.7 ± 0.63%) was lower than ABTS radicals (8.5 ± 0.27%). The antibacterial activity of the oil was also evaluated using disc diffusion method against <I>Staphylococcus aureus</I>, <I>Streptococcus mutans</I>, <I>Listeria monocytogenes</I>, <I>Acinetobacter baumannii</I>, <I>Escherichia coli</I>, and <I>Vibrio parahaemolyticcus</I>. The oil exhibited no antibacterial activity against all the bacterial strains tested except <I>S. aureus</I> of mild activity.</P>