• Title/Summary/Keyword: EtOAc fractionation

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Antioxidant Properties of Ginseng (P. ginseng C.A. Meyer) Extracts by Organic Solvent Fractionation

  • Kim, Ji-Sang;Moon, Gap-Soon;Kim, Hyun-Oh;Lee, Young-Soon
    • Preventive Nutrition and Food Science
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    • v.12 no.4
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    • pp.267-272
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    • 2007
  • The objective of this study was to investigate antioxidant activities of Panax ginseng extracted with various solvents including n-hexane, chloroform, EtOAC, n-butanol and water. Among the various ginseng extracts, ethyl acetate (EtOAC) extracts showed the most powerful scavenging activities against DPPH radicals. Among the other solvent extracts, the butanol extract seemed relatively more effective in scavenging activity, followed by chloroform, water and hexane extracts. Moreover, the highest reducing power and ferrous ion chelating activity were found in the EtOAC extract followed by other extracts of ginseng. EtOAC extracts, which exhibited the best antioxidant activities of all solvent extracts of ginseng, possessed higher concentrations of total phenolics (777.61 mg/100 g) than other extracts. These results suggest that EtOAC extracts of ginseng (P. ginseng C.A. Meyer) have the most effective antioxidant capacity compared to n-hexane, chloroform, n-butanol and water tested in this study, and has important applications for the pharmaceutical and food industries.

Anti-inflammatory Effect of Morinda citrifolia on LPS-induced Inflammation in RAW 264.7 Cells Through the JAK/STAT Signaling Pathway (JAK/STAT 신호전달 경로를 통한 LPS 유도 RAW 264.7 세포의 염증에 대한 노니의 항염증 효과)

  • Jo, Beom Gil;Bang, In Seok
    • Journal of Life Science
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    • v.32 no.2
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    • pp.125-134
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    • 2022
  • This study investigated whether or not the major bioactive compounds of Noni (Morinda citrifolia) are involved in anti-inflammatory activity through the JAK/STAT upper signaling pathway in RAW 264.7 cells. The experimental results show that the M. citrifolia ethyl acetate fraction (Mc-EtOAc) obtained by sequential fractionation with organic solvents from the plant's dried fruits exhibits the highest antioxidant activity. In addition, the cytoprotective effects of Mc-EtOAc against H2O2-induced oxidative stress in the RAW 264.7 cells suppressed cytotoxicity in a dose-dependent manner. The group pretreated with Mc-EtOAc at a concentration of 240 ㎍/ml showed higher cell viability of 84.5%, compared to 71.6% in the LPS-treated group, and LPS-induced NO production decreased to half the amount in the positive control group. Mc-EtOAc treatment also led to a significant dose-dependent reduction in iNOS expression. Although COX-2 expression was increased by 300% following LPS induction, it was significantly decreased in a dose-dependent manner by pretreatment with Mc-EtOAc at concentrations of 120 and 240 ㎍/ml. An inhibition of the mRNA expression of pro-inflammatory cytokines IL-1β and TNF-α was observed. The investigation also revealed that the phosphorylation levels of pJAK1 and pSTAT3 in LPS-induced RAW 264.7 cells were significantly reduced by Mc-EtOAc treatment.

Isoflavonoids from the liquid media of Bacillus licheniformis (Bacillus licheniformis 배지의 Isoflavonoids)

  • 이학주;박영기;이재필;이상현;여운홍
    • Journal of Korea Foresty Energy
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    • v.20 no.2
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    • pp.28-33
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    • 2001
  • Using liquid media of Bacillus licheniformis, extraction with butanol and fractionation with n-hexane and ethyl acetate(EtOAc) were performed, From the EtOAc fraction, the isolation was also performed using chromatography. Three isoflavonoids were isolated from the liquid media of Bacillus licheniformis and identified as diadzein, genistein and genistin by Mass and NMR spectroscopic analysis.

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Isolation and Characterization of Benzoic Acid with Antimicrobial Activity from Needle of Pinus densiflora (솔잎에서 항미생물 활성을 갖는 benzoic acid의 분리 및 동정)

  • Kuk, Ju-Hee;Ma, Seung-Jin;Park, Keun-Hyung
    • Korean Journal of Food Science and Technology
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    • v.29 no.2
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    • pp.204-210
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    • 1997
  • The ethyl acetate (EtOAc) extracts from needles of Pinus densiflora were showed antimicrobial activities against bacteria, yeast and fungi. The antimicrobial active substance of EtOAc extracts were successively purified with solvent fractionation, silica gel adsorption column chromatography and Sephadex LH-20 column chromatography. The purified active substance was isolated as crystals and identified as benzoic acid by $MS,\;^{1}H-NMR\;and\;^{13}C-NMR$. The amount of benzoic acid was 0.608 mg per gram of fresh needle of Pinus densiflora.

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Isolation and Characterization of Cinnamic Acid with Antimicrobial Activity from Needle of Pinus densiflora (솔잎에서 항미생물 활성을 갖는 Cinnamic Acid 의 분리 및 동정)

  • Kuk, Ju-Hee;Ma, Seung-Jin;Park, Keun-Hyung
    • Korean Journal of Food Science and Technology
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    • v.29 no.4
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    • pp.823-826
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    • 1997
  • The EtOAc extracts from needles of Pinus densiflora showed antimicrobial activities against bacteria, yeast and fungi. The antimicrobial principle was successively purified by solvent fractionation, silica gel adsorption column chromatography and Sephadex LH-20 column chromatography. The active substance was further purified by HPLC using $C_{18}$ column. The active substance was identified as trans-cinnamic acid by MS, $^{1}H-NMR\;and\;^{13}C-NMR$. The amount of cinnamic acid was $9.27\;{\mu}g$ Per gram of fresh needle of Pinus densiflora.

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Antimutagenic Effect of the Extract Complex of Korean Anti-thirst Herb Medicines (한방 소갈약 추출물의 혼합물에 의한 항돌연변이 효과)

  • 박건영;정근옥;이경태;최종원;정현주;박희준
    • YAKHAK HOEJI
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    • v.46 no.5
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    • pp.352-357
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    • 2002
  • The three crude drugs of the Kalopanax pictus (Araliaceae) roots (K), Pueraria thunbergiana (Leguminosae) flowers (P), and the Rhus verniciflua (Anacardiaceae) heartwood(R) used for anti-thirst drugs in Oriental herb medicine were extracted with MeOH, respectively, and the successive fractionation of the extract gave EtOAc extract. Certain amount ratios of the three extracts were also prepared to compare the antimutagenicity in Ames test. In N-methyl-N(-nitro-N-nitrosoguanidine (MNNG; 0.4 (g/plate)-induced test, the activities of complex mixture were observed between the highest antimutagenic activity of K extract and the lowest P extract. In aflatoxin (AFB$_1$)-induced test, the EtOAc complex (K : P : R=l : 1 : 3) labeled E-113 decreased the revertants of Salmonella typhimurium TA100 by 95%, which activity were highest among other extracts or complexes mixture used. Fractionation of organic solvent mostly increased the antimutagenicity. These trends were also observed in the antimutagenicity test of the mixture of each active component of kalopanaxsaponin A, tectorigenin and sulfuretin. These results supported that many kinds of anti-thirst herb medicine in the prescription could effectively prevent cancer disease.

Anti-oxidant and Anti-inflammation Activity of Fractions from Aster glehni Fr. Schm. (섬쑥부쟁이(Aster glehni Fr. Schm.) 분획물의 항산화 및 항염증 활성)

  • Kim, Han-Hyuk;Park, Gun-Hye;Park, Kang-Soo;Lee, Jin-Young;An, Bong-Jeun
    • Microbiology and Biotechnology Letters
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    • v.38 no.4
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    • pp.434-441
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    • 2010
  • The Plants and their extracts containing polyphenol have been shown to be associated with decreased the cause of aging and variety of disease such as reaction oxygen species (ROS) and reactive nitrogen species (RNS) in several recent studies. We conducted to investigate whether the extracts and fractionation isolated from Aster glehni Fr. Schm. has an inhibitory effect association with oxidation or inflammation. The Aster glehni Fr. Schm. 70% aq. MeOH was fractioned according to polarity with n-hexane layer, EtOAc layer, n-BuOH layer and water layer. The electron donating ability of EtOAc, n-BuOH solvent fraction from Aster glehni Fr. Schm. was about 58.0%, 46.4% at $50\;{\mu}g/mL$, respectively. The superoxide anion radical inhibitory effect of EtOAc extracts was about 64.65% at $50\;{\mu}g/mL$, and n-BuOH extracts was 35.66% at $50\;{\mu}g/mL$. EtOAc layer to the inhibition activity of hyaluronidase and lipoxygenase were inhibited about 24.37%, 29.5% at $5\;{\mu}g/mL$. In the anti-inflammation effect of EtOAc layer inhibited the generation of nitric oxide. also, these results showed that EtOAc extract inhibited 81.5% at $50\;{\mu}g/mL$ on the expressions of iNOS protein in Raw264.7 cell line.

Anti-Oxidative and Anti-Inflammatory Effects of the Solvent Fraction from Theobroma cacao L. Extract (카카오(Theobroma cacao L.) 용매 분획물의 항산화 및 항염증 효과)

  • Kim, Young-Sun;Lee, Jin-Young;Cho, Young-Je;An, Bong-Jeun
    • Journal of Life Science
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    • v.22 no.10
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    • pp.1330-1338
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    • 2012
  • Solvent extracts of Theobroma cacao L. (TCL) were investigated for anti-oxidative and anti-inflammatory effects in order to consider TCL as a functional ingredient for cosmetic products. TCL(A) extract was fractioned according to polarity with $CHCl_3$, EtOAc, n-BuOH, and water. Following TCL(A) fractionation, the electron-donating ability of the n-BuOH and EtOAc solvent fractions (each 100 ${\mu}g/ml$) was about 76.2% and 53.9%, respectively. The superoxide anion radical inhibitory effect of the n-BuOH and EtOAc solvent fractions (each 50 ${\mu}g/ml$) was about 76.09% and 51.4%, respectively. Results of lipid oxidation showed that $Fe^{2+}$ had a greater chelating effect than $Cu^{2+}$. The $Fe^{2+}$ chelating effect of the EtOAc solvent fraction (50 ${\mu}g/ml$) was about 64%. Hyaluronidase inhibition related to the anti-inflammatory effect was 53.0% with EtOAc at 100 ${\mu}g/ml$, while the lipoxygenase inhibitory effect was about 51.32% at 10 ${\mu}g/ml$. The anti-inflammatory activity in the EtOAc fraction inhibited the generation of nitric oxide. Results also showed that iNOS protein expression increased in RAW264.7 cells. In contrast, at 100 ${\mu}g/ml$ EtOAc, iNOS and COX-2 protein expression significantly decreased in LPS-stimulated RAW 264.7 cells.

α-Glucosidase Inhibition Activity of the Extracts of Katsura Tree (Cercidiphyllum japonicum Sieb. Et Zucc) Leaves

  • Lee, Tae-Seong;Ryu, Wang-Gyun;Bae, Young-Soo
    • Journal of the Korean Wood Science and Technology
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    • v.43 no.2
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    • pp.238-247
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    • 2015
  • Katsura tree (Cercidiphyllum japonicum Sieb. Et Zucc) leaves were collected, air-dried and extracted with 70% aqueous acetone, then concentrated and sequentially fractionated using n-hexane, $CH_2Cl_2$, EtOAc, and $H_2O$ to be freeze dried for antioxidant and ${\alpha}$-glucosidase inhibition activity tests. The antioxidant activity of the extracts was evaluated using DPPH (1,1-diphenyl 2-picrylhydrazyl) free radical scavenging assay. The test concentrations were adjusted to 500, 250, 125, 62.5, 31.25, 15.62, 7.81, 3.9, 1.95 and 0.97 ppm. The $H_2O$ and EtOAc fractions showed higher activities compared with the control, ${\alpha}$-tocopherol, at all concentrations. The crude fraction also gave better activity at the concentrations lower than 62.5 ppm. However, the nonpolar n-hexane and $CH_2Cl_2$ fractions gave prominently lower activities compared with the control at all concentrations. The $IC_{50}$ values of the crude, EtOAc, and $H_2O$ fractions exhibited 11.78, 4.29 and $9.80{\mu}g/m{\ell}$, respectively, compared with $12.08{\mu}g/m{\ell}$ of the control. But the n-hexane and $CH_2Cl_2$ fractions indicated 300 and $91.85{\mu}g/m{\ell}$ of $IC_{50}$, respectively. ${\alpha}$-Glucosidase inhibition activity was evaluated at the concentrations of 50, 25, 12.5, 6.3, 3.1, 1.6 and 0.8 ppm. The inhibition activities were increased according to as the increase of sample concentrations. However, the nonpolar n-hexane and $CH_2Cl_2$ fractions indicated very low inhibition activities compared with acarbose, a positive control. The EtOAc fraction showed very good capability as almost 100% compared with the control at the higher concentrations than 12.5 ppm and the crude fraction also indicated good potential as 95% and 100% at 25 and 50 ppm, respectively. The $H_2O$ fraction gave good inhibition value as 90% at 50 ppm although the value was lower than the control. These results showed that the polar fractions had better ${\alpha}$-glucosidase inhibition activities. The $IC_{50}$ values of the nonpolar fractions, n-hexane and $CH_2Cl_2$, showed very lower values as 468 and $103.6{\mu}g/m{\ell}$, respectively, than the control. ${\alpha}$-Glucosidase Inhibition Activity of the Extracts of Katsura Tree (Cercidiphyllum japonicum Sieb. Et Zucc) Leaves However, the polar fractions, crude, EtOAc and $H_2O$, showed 7.1, 3.7 and $13{\mu}g/m{\ell}$, respectively, indicating that these fractions can be used as natural bioresources for treating diabetes mellitus. Also ${\alpha}$-glucosidase inhibition activity had a positive correlation with antioxidant activity of the extracts.

Antitumor Agent from the Rhizome of Anemarrhena asphodeloides (지모(知母)의 항암활성성분에 관한 연구)

  • Lee, Seung-Ho;Ryu, Shi-Yong;Choi, Sang-Un;No, Zae-Sung;Kim, Sung-Ki;Lee, Chong-Ock;Ahn, Jong-Woong
    • Korean Journal of Pharmacognosy
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    • v.26 no.1
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    • pp.47-50
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    • 1995
  • EtOAc soluble part of MeOH extract of Anemarrhena asphodeloides rhizome was evaluated for the cytotoxicity against the five kinds of human tumor cell lines (A-549, SK-OV-3, SK-MEL-2, XF498 and HCT15) in vitro. Bioassay-guided fractionation of EtOAc soluble part led to the isolation of active compound which was identified as timosaponin A-III showed potent cytotoxic activity, but its genin, sarsasapogenin, did not show cell growth inhibition.

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