• 한국식품영양과학회지
• /
• 제43권5호
• /
• pp.661-667
• /
• 2014

본 연구에서는 천년초 줄기 분말을 이용한 식품 개발에 활용하고자 천년초 줄기 분말을 용매별로 추출하여 항당뇨 및 항산화 활성을 시험하였다. 천년초 줄기의 ethyl acetate fraction을 $1,000{\mu}g/mL$ 처리했을 때 ${\alpha}$-amylase 억제활성이 $89.94{\pm}1.15%$로 가장 높았으며, 다른 fraction들은 $12.19{\pm}2.39{\sim}28.14{\pm}2.06%$로 낮았다. ${\alpha}$-Glucosidase 억제활성은 ethyl acetate fraction이 $29.01{\pm}0.49%$로 가장 높았으며, 75% ethanol fraction은 $23.48{\pm}9.89%$였고 water fraction이 $12.59{\pm}1.35%$로 가장 낮았다. 용매 분획별 total phenolics 함량과 total flavonoids 함량은 ethyl acetate fraction에서 각각 $196.02{\pm}5.26$ 및 $114.00{\pm}10.03{\mu}g/mg$으로 가장 높게 나타났다. Ethyl acetate fraction의 DPPH 및 ABTS radical 소거능은 농도 의존적으로 각각 $88.78{\pm}0.30%$ 및 $97.27{\pm}0.94%$로 가장 높게 나타났으며, 대조구인 BHT 및 비타민 C와 비슷하였다. FRAP 활성은 chloroform 및 ethyl acetate fraction에서 각각 $1.119{\pm}0.018$ 및 $1.057{\pm}0.014abs(593nm)$로 다른 fraction보다 높게 나타났다. 전체적으로 천년초 줄기의 ethyl acetate fraction의 항당뇨 및 항산화 효과가 가장 높게 나타났으며, 상업적으로 사용되는 BHT 및 비타민 C와 비슷한 항산화 효과를 나타내는 천연소재를 발굴함으로써 천년초 줄기가 항당뇨 및 항산화 활성을 갖는 식품소재로서 활용 가능성이 높은 것으로 판단되었다.

• Environmental Analysis Health and Toxicology
• /
• 제2권1_2호
• /
• pp.25-32
• /
• 1987

The effects of ginseng ethanol extract on the toxicity of lead acetate in mice were examined. Mice were given intraperitoneally daily doses of lead acetate 50 mg/kg with ginseng ethanol extract 50 mg/kg, 100 mg and 200 mg/kg for 3 weeks. The exposure of lead acetate showcd the toxicity at all experimental assay such as the gain of body weight, the ratio of some organs weight to body weight, serum transaminase activity and creatinine value, hematocrit and WBC counts. These toxicities were inhibited significantly by the ginseng ethanol extract administration. The 50 mg/kg and 100 mg/kg administration of ginseng ethanol extract inhibited histopathological changes on kidney by lead acetate, whereas the 200 mg/kg administration of the fraction enhanced histopathological changes.

• 생약학회지
• /
• 제43권4호
• /
• pp.316-322
• /
• 2012

Siegesbeckia Herba is known to have anti-oxidant, anti-inflammatory, anti-allergic and anti-tumor. The objective of this study is to explore the neuroprotective effect of Siegesbeckia Herba against glutamate-induced oxidative stress in mouse hippocampal HT22 cells. Siegesbeckia Herba 70% ethanol extract and solvent fractions have the potent neroprotective effects on glutamate-induced nerotoxicity by induced the expression of heme oxygenase (HO)-1 in the mouse hippocampal HT22 cells. Especially, ethyl acetate fraction showed higher protective effect. In HT22 cell, Siegesbeckia Herba ethyl acetate fraction makes the nuclear accumulation of Nrf2. Further, we found that treatment with c-JUN N-terminal kinase (JNK) inhibitor (SP600125) reduced Siegesbeckia Herba ethyl acetate fraction induced HO-1 expression and Siegesbeckia Herba ethyl acetate fraction also increased JNK phosphorylation. In conclusion, the ethyl acetate fraction of 70% ethanol extract of Siegesbeckia Herba significantly protect glutamate-induced oxidative damage by induction of HO-1 via Nrf2 and JNK pathway in mouse hippocampal HT22. Taken together these finding suggest that Siegesbeckia Herba ethyl acetate fraction good source for taking active compounds and may be a potential therapeutic for brain disorder by targeting the oxidative stress of neuronal cell.

• 한국식품위생안전성학회지
• /
• 제2권2호
• /
• pp.57-65
• /
• 1987

한국에서 재배된 영지의 혈압 강하 작용을 검색한 결과, 두 종류의 영지 자실체에서 모두, 용량을 증가시킴에 따라 심박수, 수축기 혈압 및 확장기 혈압을 강하시킴을 관찰하였다. 또, 이러한 혈압을 강하시키는 유효 성분은 fraction B에 많이 포함되어 있음을 확인할 수 있었는데, 선천성 고혈압 쥐에 체중당 10mg을 정맥내 투여했을 때, 대조군과 비교하여 유의한 차이를 가지고 혈압을 강하시켰다. 혈액 관류 심장 표본에서의 영지의 작용을 관찰해 본 결과, sample J의 경우는 용량에 따라 심박수 및 심실 수축력을 증가시켰으나 sample K의 경우 용량을 증가시킴에 따라 심박수 및 심방 수축력을 오히려 감소시켰으며, 심실 수축력은 거의 변화가 없었고, 또, 관상동맥 혈류량을 용량의존적으로 증가시켰다. 심장에 대한 위의 모든 반응은 fraction A와 B에서만 나타났고, fraction C는 영향을 끼치지 못했다.

• Archives of Pharmacal Research
• /
• 제26권1호
• /
• pp.34-39
• /
• 2003

The traditional Asian medicinal herb, roots of Astragalus (A.) membranaceus (Leguminosae), is used for many purposes, some of which are purported to stimulate the release of growth hormone in vivo. Extracts of A. membranaceus were tested to determine whether they stimulate the release of growth hormone in rat pituitary cell culture. A. membranaceus was extracted sequentially with 80% ethanol (fraction A), n-hexane (fraction B); the test compound from the herbal extraction was isolated using silica gel column chromatography and was identified with spectral data. Test compound was also extracted by traditional boiling water methods. Induction of growth hormone in pituitary cell culture was conducted with isolated compounds and extracted fractions of A. Radix (dried roots of A. membranaceus). The fraction A was not active in the rat pituitary cell culture, but the fraction B derived from the ethanol fraction stimulated the release of growth hormone in culture. Six compounds from fraction B (1-6) were isolated and identified previously. The compounds 1,2-benzendicarboxylic acid diisononylester (1), $\beta$-sitosterol (2), and 3-Ο-$\beta$-D-galactopyranosyl-$\beta$-sitosterol (5) did not induce growth hormone release in the culture. Formononetin (3), 9Z, 12Z-octadecadienoic acid (4), stigmast-4-en-6$\beta$-o1-3-one (6) and 98-E, a mixture of 1'-9, 12-octadecadienoic acid (Z,Z)-2',3'-dihydroxy-propylester (7) and 1'-hexadecanoic acid-2',3'-dihydroxy-propylester (8) stimulated the release of growth hormone in the rat pituitary cell culture significantly compared to the control. In conclusions, four compounds isolated from extracts of A. Radix induced growth hormone release in the rat pituitary cell culture. The 98-E isolate was the most active inducer of growth hormone release.

• 한국식품과학회지
• /
• 제32권1호
• /
• pp.200-205
• /
• 2000

췌장에서 분비되는 cholesterol esterase(CEase)와 소장의 acyl coenzyme A: cholesterol acyltransferase(ACAT)는 흡수된 콜레스테롤을 다시 ester화하는데 관여한다. 한방재료 중 건위, 진토 및 수렴지사작용 등을 가지는 초두구(Alpiniae Katusumadaii Semen)의 에탄올 추출물이 in vitro에서 cholesterol esterase활성에 대하여 강한 저해작용을 보였으며 에탄올추출물의 용매분획 중 클로로포름분획이 다른 분획들, 즉 에틸 아세테이트분획, 부탄올분획 및 물 분획보다 강하였다. 초두구의 클로로포름분획이 고 콜레스테롤식이를 섭취시킨 rat에서 혈중 콜레스테롤치를 저하시키는 효과가 있는지 측정한 실험에서 chloroform분획을 100 mg/kg 및 150 mg/kg 섭취시켰을 경우 각각 총cholesterol 함량이 11.8% 및 20.8% 감소하였으며 HDL-cholesterol 함량 및 동맥경화지수는 정상군에 가깝게 회복된 것으로 나타났다. 또한 초두구 chloroform분획의 독성검사 결과 mouse에서 $LD_{50}$은 1,625mg/kg으로 산출되었다.

• 생약학회지
• /
• 제48권2호
• /
• pp.125-133
• /
• 2017

In this study, we investigated the total phenolic and flavonoid contents, component analysis, antioxidative activity and cellular protective effects against oxidative stress on human skin cells in 50% ethanol extract, ethyl acetate fraction and aglycone fraction obtained from Gynostemma pentaphyllum (G. pentaphyllum) Makino. The DPPH (1,1-diphenyl-2-picrylhydrazyl) scavenging activites ($FSC_{50}$) of the 50% ethanol extracts, ethyl acetate fraction and aglycone fraction were 246.8, 147.2, $128.9{\mu}g/mL$, respectively. Reactive oxygen species (ROS) scavenging activities ($OSC_{50}$) of the 50% ethanol extract, ethyl acetate fraction and aglycone fraction on ROS generated in $Fe^{3+}-EDTA/H_2O_2$ system using the luminol-dependent chemiluminescence assay were 37.15, 10.74, $7.19{\mu}g/mL$, respectively. We investigated the cellular protective activity and the results showed that treatment of aglycone fraction ($0.05-0.39{\mu}g/mL$) protect human skin cells in a concentration-dependent manner when the skin cell damages were induced by treating them with $H_2O_2$. These results suggest that extract/fractions of G. pentaphyllum Makino may be applicable as natural antioxidants in cosmetics.

• 한국식품조리과학회지
• /
• 제3권1호
• /
• pp.78-85
• /
• 1987

D-glucose와 D-glucose에 citric acid를 첨가한 용액을 6, 12, 24, 36, 45시간 가열하여 얻은 갈색화반응 중간 생성물과 Sephadex G-15로 분별한 분별물의 색깔 강도와 12, 24, 48시간 반응시킨 갈색화중간생성물의 대두 유기질에 대한 항산화효과를 조사한 결과 다음과 같이 요약할 수 있었다. 색깔강도는 D-glucose단독의 경우보다 citric acid를 첨가한 때에, 또 가열시간이 증가함에 따라 증가하는 것으로 보여지며 반응생성물의 sephadex G-15에 의한 분별물의 색깔강도는 sample A~F에서 모두 고분자량인 Fraction II에서 가장 높게 나타났으며 그중 glucose에 citric acid를 첨가한 Sample F의 fraction II가 가장 높은 흡광도를 보였다. 또한 무수 ethanol로 추출한 분별물의 대두유 기질에 처한 항산화효과는 초기에 분별된 Fraction I을 제외하고는 모두 Control보다 좋은 항산화효과를 나타내었으며 Sample D를 제외한 ample A, B, C, D, E, F의 Fraction I은 30일 저장시에 control보다 오히려 산패가 더 촉진되었고 fraction IV, V의 부분에서 좋은 항산화효과를 나타내어 초기에 분별된 고분자물질보다 후기에 분별된 저분자물질이 더 좋은 항산화효과를 나타냄을 알 수 있었고, 색깔강도의 결과와 같이 가열진행시간이 길어질수록 또 citric acid가 첨가된 경우가 항산화효과가 크게 나타났다. 또한 citric acid가 첨가되면 가열시간에 따른 항산화효과의 증가폭이 glucose 단독인 때보다 적다는 것을 알 수 있었다.

• 대한한방내과학회지
• /
• 제26권3호
• /
• pp.543-550
• /
• 2005

This study was designed to identify the effects of Reynoutria Japonica on antibacterial activity aganist Bordetella pertussis ATCC 9797 which is cause of whooping cough. The ethanol- and water-extracts of more than 80 oriental herbal medicine were Investigated by Kirby -Bauer method to determine their inhibitory effects on growth of B. pertussis ATCC 9797 in vitro. For that Reynoutria Japonica was selected. The ethanol-soluble extract of Reynoutria Japonica showed relatively high antivacterial activity against B. pertussis ATCC 9797. However, the water-soluble extract of Reynoutria Japonica showed no antibacterial activity. The ethanolic extract was further fractionated with organic solvents such as hexane, chloroform, and ethyl acetate, in that order. Among the fraction tested, the chloroform fraction showed the highest antibacterial activity when the ethanol-soluble extract of Reynoutria Japonica minial inhibitory concentration(MIC) was $25{\mu}g/m{\ell}l$. Results support a role far Reynoutria Japonica in inhibiting the cell growth of B. pertussis ATCC 9797, but further experimentation is required.

• Preventive Nutrition and Food Science
• /
• 제16권4호
• /
• pp.376-380
• /
• 2011

We investigated the total phenolic and flavonoid contents and the antimicrobial activity of ethanol extracts obtained from Saussurea lappa C.B. Clarke. The ethanol extracts of S. lappa C.B. Clarke were fractionated with various solvents (n-hexane, chloroform, and n-butanol). The antimicrobial activity of S. lappa C.B. Clarke was examined by disc-diffusion and micro-dilution susceptibility assays with six food-borne pathogens, and compared to that of the synthetic antibiotics. It is found that the S. lappa C.B. Clarke ethanol extract and n-hexane fraction have strong activity against B. cereus and V. parahaemolyticus strains compared to ampicillin. The inhibitory concentration ($IC_{50}$) values of hexane fraction against L. monocytogenes, B. cereus, and B. subtilis were 62.5, 250 and 500 ppm, respectively. Therefore, these data suggest that S. lappa C.B. Clarke may be useful as antimicrobial agents against food-borne pathogens.