LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 9 of total 9

Search options

  1. Article ; Online: α

    Bui Thi Thuy, Luyen / Vu Thanh, Binh / Nguyen Thuy, Duong / Chu Thi Thanh, Huyen / Ha Van, Oanh / Nguyen Phuong, Thao / Nguyen Manh, Tuyen

    Natural product research

    2023  Volume 37, Issue 24, Page(s) 4121–4130

    Abstract: One new compound, 4,7-dihydroxy-2-hydroxymethyl-5,6-dimethoxyanthraquinone ( ...

    Abstract One new compound, 4,7-dihydroxy-2-hydroxymethyl-5,6-dimethoxyanthraquinone (
    MeSH term(s) Glycoside Hydrolase Inhibitors/pharmacology ; Glycoside Hydrolase Inhibitors/chemistry ; Hypoglycemic Agents/pharmacology ; Chamaecrista ; alpha-Glucosidases/chemistry ; alpha-Amylases/chemistry ; Plant Extracts/chemistry ; Plant Components, Aerial/chemistry
    Chemical Substances Glycoside Hydrolase Inhibitors ; Hypoglycemic Agents ; alpha-Glucosidases (EC 3.2.1.20) ; alpha-Amylases (EC 3.2.1.1) ; Plant Extracts
    Language English
    Publishing date 2023-01-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 2185747-7
    ISSN 1478-6427 ; 1478-6419
    ISSN (online) 1478-6427
    ISSN 1478-6419
    DOI 10.1080/14786419.2023.2169864
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article: In silico investigation of cycloartane triterpene derivatives from Cimicifuga dahurica (Turcz.) Maxim. roots for the development of potent soluble epoxide hydrolase inhibitors

    Thao, Nguyen Phuong / Bui Thi Thuy Luyen / Jang Hoon Kim / Nguyen Tien Dat / Young Ho Kim

    International journal of biological macromolecules. 2017 May, v. 98

    2017  

    Abstract: In our search for natural soluble epoxide hydrolase (sEH) inhibitors from plants, we found that an ethanolic extract of the roots of Cimicifuga dahurica (Turcz.) Maxim. significantly inhibits sEH in vitro. A phytochemical study on the dichloromethane ... ...

    Abstract In our search for natural soluble epoxide hydrolase (sEH) inhibitors from plants, we found that an ethanolic extract of the roots of Cimicifuga dahurica (Turcz.) Maxim. significantly inhibits sEH in vitro. A phytochemical study on the dichloromethane fraction of C. dahurica resulted in the isolation of two new cycloartane triterpenoids (1 and 6), together with 13 known cycloartane analogues (2–5 and 7–15). The structures of compounds were determined by spectroscopic methods. All of the triterpenoid derivatives inhibited sEH enzymatic activity in a concentration-dependent manner, and 13 of the tested compounds showed significant activity. Among them, compounds 1, 3, 5, 7, 9, and 12 showed the highest levels of inhibitory activity, with IC50 values of about 5μM or less. Kinetic analysis of compounds 1, 3, 5–9, 11, 12, and 14 revealed that compounds 3, 6, 7, 11, and 14 were non-competitive; 1, 5, 9, and 12 were mixed-type; and 8 was a competitive inhibitor. Furthermore, in silico molecular docking indicated that compounds 3, 6–9, 11, 12, and 14 bound to sEH in a similar manner and had stable binding energies, as calculated by AutoDock 4.2 and processed in a 10,000-ps molecular dynamics simulation to assess the binding stability of compounds 5, 7, and 9.
    Keywords enzyme activity ; epoxide hydrolase ; inhibitory concentration 50 ; kinetics ; methylene chloride ; molecular dynamics ; molecular models ; roots ; spectral analysis ; triterpenoids
    Language English
    Dates of publication 2017-05
    Size p. 526-534.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 282732-3
    ISSN 1879-0003 ; 0141-8130
    ISSN (online) 1879-0003
    ISSN 0141-8130
    DOI 10.1016/j.ijbiomac.2017.02.023
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  3. Article ; Online: Chemical Constituents from Cimicifuga dahurica and Their Anti-Proliferative Effects on MCF-7 Breast Cancer Cells

    Chu Thi Thanh Huyen / Bui Thi Thuy Luyen / Ghulam Jilany Khan / Ha Van Oanh / Ta Manh Hung / Hui-Jun Li / Ping Li

    Molecules, Vol 23, Iss 5, p

    2018  Volume 1083

    Abstract: This study was designed to search for novel anti-cancer compounds from natural plants. The 70% ethanolic extract from the rizhomes of Cimicifuga dahurica (Turcz.) Maxim. (Ranunculaceae) was found to possess significant in vitro anti-proliferative effects ...

    Abstract This study was designed to search for novel anti-cancer compounds from natural plants. The 70% ethanolic extract from the rizhomes of Cimicifuga dahurica (Turcz.) Maxim. (Ranunculaceae) was found to possess significant in vitro anti-proliferative effects on MCF-7 breast cancer cells. A phytochemical investigation using assay-guided fractionation of the ethanolic extract of C. dahurica resulted in the isolation of one new phenolic amide glycoside 3, two new lignan glycosides 4 and 7, one new 9,19-cycloartane triterpenoid glycoside 6, and thirteen known constituents 1, 2, 5, and 8–17. The structures of 3, 4, 6, and 7 were established using contemporary NMR methods and from their HRESIMS data. The anti-proliferative effects of isolated compounds were evaluated using the BrdU-proliferation kit. Five among the 17 isolated compounds showed significant anti-proliferative effects (p ≤ 0.05), wherein compound 7 showed the most significant anti-proliferative and cell cycle arresting effect (p ≤ 0.05) which followed a dose dependent manner. Western blot protein expression analysis showed a down expression of c-Myc and cyclin D1 which further elucidated the anti-proliferation mechanism of compound 7 while apoptotic effects were found in association with Bcl-2 family protein expression variations. Conclusively this study reports the isolation and identification of 17 compounds from C. dahurica, including four novel molecules, in addition to the fact that compound 7 possesses significant anti-proliferative and apoptotic effects in vitro that may require further exploration.
    Keywords Cimicifuga dahurica ; lignan ; phenolic amide ; triterpenoid glycoside ; anti-proliferation ; Organic chemistry ; QD241-441
    Subject code 500
    Language English
    Publishing date 2018-05-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  4. Article: A new saponin from Acanthopanax koreanum with anti-inflammatory activity

    Dat, Le Duc / Nguyen Phuong Thao / Bui Thi Thuy Luyen / Bui Huu Tai / Mi Hee Woo / Zahid Manzoor / Irshad Ali / Young Sang Koh / Young Ho Kim

    Archives of pharmacal research. 2017 Mar., v. 40, no. 3

    2017  

    Abstract: Twelve saponins were isolated from the leaves of Acanthopanax koreanum, including one new lupane-type triterpene glycoside, named acankoreoside R (1), together with 11 known triterpenoid saponins (2–12). Their structures were elucidated by 1D and 2D ... ...

    Abstract Twelve saponins were isolated from the leaves of Acanthopanax koreanum, including one new lupane-type triterpene glycoside, named acankoreoside R (1), together with 11 known triterpenoid saponins (2–12). Their structures were elucidated by 1D and 2D nuclear magnetic resonance (NMR), mass spectroscopic data (MS). All of the fractions and isolated saponins were evaluated for anti-inflammatory activities in lipopolysaccharide (LPS)-stimulated bone marrow-derived dendritic cells (BMDCs) by ELISA. Among them, compounds 1–5, 7, 10, and 12 showed strong inhibitions towards interleukin-12 (IL-12) production with IC₅₀ values ranging from 1.59 to 5.46 µM. Other compounds were weak or inactive toward IL-12 p40 production.
    Keywords Eleutherococcus gracilistylus ; anti-inflammatory activity ; dendritic cells ; enzyme-linked immunosorbent assay ; inhibitory concentration 50 ; interleukin-12 ; leaves ; lipopolysaccharides ; nuclear magnetic resonance spectroscopy ; spectral analysis ; triterpenoid saponins
    Language English
    Dates of publication 2017-03
    Size p. 311-317.
    Publishing place Pharmaceutical Society of Korea
    Document type Article
    ZDB-ID 447623-2
    ISSN 1976-3786 ; 0253-6269
    ISSN (online) 1976-3786
    ISSN 0253-6269
    DOI 10.1007/s12272-016-0879-5
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  5. Article ; Online: Anti-Protozoal Activities of Cembrane-Type Diterpenes from Vietnamese Soft Corals

    Nguyen Phuong Thao / Bui Thi Thuy Luyen / Reto Brun / Marcel Kaiser / Phan Van Kiem / Chau Van Minh / Thomas J. Schmidt / Jong Seong Kang / Young Ho Kim

    Molecules, Vol 20, Iss 7, Pp 12459-

    2015  Volume 12468

    Abstract: Based on our previous finding that certain cembranoid diterpenes possess selective toxicity against protozoan pathogens of tropical diseases such as Trypanosoma and Plasmodium, we have subjected a series of 34 cembranes isolated from soft corals living ... ...

    Abstract Based on our previous finding that certain cembranoid diterpenes possess selective toxicity against protozoan pathogens of tropical diseases such as Trypanosoma and Plasmodium, we have subjected a series of 34 cembranes isolated from soft corals living in the Vietnamese sea to an in vitro screening for anti-protozoal activity against Trypanosoma brucei rhodesiense (Tbr), T. cruzi (Tc), Leishmania donovani (Ld), and Plasmodium falciparum (Pf). Twelve of the tested compounds displayed significant activity against at least one of the parasites. Specifically, 7S,8S-epoxy-1,3,11-cembratriene-16-oic methyl ester (1), (1R,4R,2E,7E,11E)-cembra-2,7,11-trien-4-ol (2), crassumol D (12), crassumol E (13), and (1S,2E,4S,6E,8S,11S)-2,6,12(20)-cembrantriene-4,8,11-triol (16) from Lobophytum crassum, L. laevigatum, and Sinularia maxima showed the highest level of inhibitory activity against T. b. rhodesiense, with IC50 values of about 1 µM or less. Lobocrasol A (6) and lobocrasol C (8) from L. crassum and L. laevigatum exhibited particularly significant inhibitory effects on L. donovani with IC50 values < 0.2 µM. The best antiplasmodial effect was exerted by laevigatol A (10), with an IC50 value of about 3.0 µM. The cytotoxicity of the active compounds on L6 rat skeletal myoblast cell was also assessed and found to be insignificant in all cases. This is the first report on anti-protozoal activity of these compounds, and points out the potential of the soft corals in discovery of new anti-protozoal lead compounds.
    Keywords soft coral ; cembrane-type diterpenes ; marine natural product ; anti-protozoal activity ; Trypanosoma brucei ; Leishmania donovani ; Plasmodium falciparum ; neglected tropical diseases ; Organic chemistry ; QD241-441
    Subject code 500
    Language English
    Publishing date 2015-07-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  6. Article ; Online: Anti-inflammatory components of the Vietnamese starfish Protoreaster nodosus

    Nguyen Phuong Thao / Bui Thi Thuy Luyen / Jung Eun Koo / Sohyun Kim / Young Sang Koh / Nguyen Xuan Cuong / Nguyen Hoai Nam / Phan Van Kiem / Young Ho Kim / Chau Van Minh

    Biological Research, Vol 48, Iss 0, Pp 1-

    2015  Volume 9

    Abstract: BACKGROUND: In the present study, we examined the inhibitory effects of a methanolic extract, dichloromethane fraction, water layer, and polyhydroxylated sterols (1-4) isolated from the Vietnamese starfish Protoreaster nodosus on pro-inflammatory ... ...

    Abstract BACKGROUND: In the present study, we examined the inhibitory effects of a methanolic extract, dichloromethane fraction, water layer, and polyhydroxylated sterols (1-4) isolated from the Vietnamese starfish Protoreaster nodosus on pro-inflammatory cytokine (IL-12 p40, IL-6, and TNF-α) production in LPS-stimulated bone marrow-derived dendritic cells (BMDCs) using enzyme-linked immunosorbent assays (ELISA). RESULTS: The methanolic extract and dichloromethane fraction exerted potent inhibitory effects on the production of all three pro-inflammatory cytokines, with IC50 values ranging from 0.60 ±0.01 to 26.19 ±0.64 μg/mL. Four highly pure steroid derivatives (1-4) were isolated from the dichloromethane fraction and water layer of P. nodosus. Potent inhibitory activities were also observed for (25S)5α-cholestane-3β,6α,7α,8β,15α,16β,26-octol (3) on the production of IL-12 p40 and IL-6 (IC50s = 3.11 ± 0.08 and 1.35 ± 0.03 μM), and for (25S)5α-cholestane-3β, 6α,8β, 15α,16β, 26-hexol (1) and (25S)5α-cholestane-3β,6α,7α,8β,15α,16β,26-heptol (2) on the production of IL-12 p40 (IC50s = 0.01 ±0.00 and and 1.02 ± 0.01 μM). Moreover, nodososide (4) exhibited moderate inhibitory effects on IL-12 p40 and IL-6 production. CONCLUSION: This is the first report of the anti-inflammatory activity from the starfish P. nodosus. The main finding of this study is the identification oxygenated steroid derivatives from P. nodosus with potent anti-inflammatory activities that may be developed as therapeutic agents for inflammatory diseases.
    Keywords Protoreaster nodosus ; Starfish ; IL-12 p40 ; IL-6 ; TNF-α ; LPS-stimulated BMDCs ; Anti-inflammatory ; Biology (General) ; QH301-705.5
    Language English
    Publishing date 2015-01-01T00:00:00Z
    Publisher BMC
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  7. Article ; Online: Secondary Metabolites from Vietnamese Marine Invertebrates with Activity against Trypanosoma brucei and T. cruzi

    Nguyen Phuong Thao / Joo Hwan No / Bui Thi Thuy Luyen / Gyongseon Yang / Soo Young Byun / Junghyun Goo / Kyung Tae Kim / Nguyen Xuan Cuong / Nguyen Hoai Nam / Chau Van Minh / Thomas J. Schmidt / Jong Seong Kang / Young Ho Kim

    Molecules, Vol 19, Iss 6, Pp 7869-

    2014  Volume 7880

    Abstract: Marine-derived natural products from invertebrates comprise an extremely diverse and promising source of the compounds from a wide variety of structural classes. This study describes the discovery of five marine natural products with activity against ... ...

    Abstract Marine-derived natural products from invertebrates comprise an extremely diverse and promising source of the compounds from a wide variety of structural classes. This study describes the discovery of five marine natural products with activity against Trypanosoma species by natural product library screening using whole cell in vitro assays. We investigated the anti-trypanosomal activity of the extracts from the soft corals and echinoderms living in Vietnamese seas. Of the samples screened, the methanolic extracts of several marine organisms exhibited potent activities against cultures of Trypanosoma brucei and T. cruzi (EC50 < 5.0 μg/mL). Among the compounds isolated from these extracts, laevigatol B (1) from Lobophytum crassum and L. laevigatum, (24S)-ergost-4-ene-3-one (2) from Sinularia dissecta, astropectenol A (3) from Astropecten polyacanthus, and cholest-8-ene-3β,5α,6β,7α-tetraol (4) from Diadema savignyi showed inhibitory activity against T. brucei with EC50 values ranging from 1.57 ± 0.14 to 14.6 ± 1.36 μM, relative to the positive control, pentamidine (EC50 = 0.015 ± 0.003 μM). Laevigatol B (1) and 5α-cholest-8(14)-ene-3β,7α-diol (5) exhibited also significant inhibitory effects on T. cruzi. The cytotoxic activity of the pure compounds on mammalian cells was also assessed and found to be insignificant in all cases. This is the first report on the inhibitory effects of marine organisms collected in Vietnamese seas against Trypanosoma species responsible for neglected tropical diseases.
    Keywords soft coral ; echinoderm ; marine natural product ; Trypanosoma brucei ; Trypanosoma cruzi ; neglected tropical diseases ; Organic chemistry ; QD241-441
    Subject code 500
    Language English
    Publishing date 2014-06-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  8. Article: In vitro evaluation of the antioxidant and cytotoxic activities of constituents of the mangrove Lumnitzera racemosa Willd.

    Nguyen, Phuong Thao / Bui, Thi Thuy Luyen / Chau, Ngoc Diep / Bui, Huu Tai / Kim, Eun Ji / Kang, Hee Kyoung / Lee, Sang Hyun / Jang, Hae Dong / Nguyen, The Cuong / Nguyen, Van Thanh / Nguyen, Xuan Cuong / Nguyen, Hoai Nam / Chau, Van Minh / Kim, Young Ho

    Archives of pharmacal research

    2015  Volume 38, Issue 4, Page(s) 446–455

    Abstract: This study performed phytochemical and bioactive assessments of the mangrove Lumnitzera racemosa Willd. leaves. Bioassay-guided fractionation of the methanolic extracts led to the identification of thirty-six compounds (1-36), their structures were ... ...

    Abstract This study performed phytochemical and bioactive assessments of the mangrove Lumnitzera racemosa Willd. leaves. Bioassay-guided fractionation of the methanolic extracts led to the identification of thirty-six compounds (1-36), their structures were elucidated using detailed NMR spectroscopic and MS analysis. The extracts, fractions, and the isolated compounds were screened for potential antioxidant and cytotoxic activities. Antioxidant assays were performed using peroxyl radical-scavenging and reducing assays, whereas cytotoxicity was measured using MTT assays in HL-60 and Hel-299 cell lines. The methanolic extract, CH2Cl2 and n-BuOH fractions (10.0 μg/mL) exhibited potent antioxidant activity, with Trolox equivalent (TE) values of 24.94 ± 0.59, 28.34 ± 0.20, and 27.09 ± 0.37 (μM), respectively. In addition, the isolated compounds exerted cytotoxic effects in a dose-dependent manner; compounds 1 and 14 exhibited the most potent cytotoxicity in HL-60 cells, with IC50 values of 0.15 ± 0.29 and 0.60 ± 0.16 μM, respectively. To clarify the mechanism(s) behind these cytotoxic effects, we measured the time-dependent changes in apoptotic markers including the condensation and fragmentation of nuclear chromatin, and the downregulation of p-ERK1/2, p-AKT, and c-Myc levels.
    MeSH term(s) Antioxidants/chemistry ; Antioxidants/isolation & purification ; Antioxidants/pharmacology ; Apoptosis/drug effects ; Apoptosis/physiology ; Combretaceae ; Cytotoxins/chemistry ; Cytotoxins/isolation & purification ; Cytotoxins/pharmacology ; Drug Evaluation, Preclinical/methods ; HL-60 Cells ; Humans ; Plant Extracts/chemistry ; Plant Extracts/isolation & purification ; Plant Extracts/pharmacology ; Plant Leaves
    Chemical Substances Antioxidants ; Cytotoxins ; Plant Extracts
    Language English
    Publishing date 2015-04
    Publishing country Korea (South)
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 447623-2
    ISSN 1976-3786 ; 0253-6269
    ISSN (online) 1976-3786
    ISSN 0253-6269
    DOI 10.1007/s12272-014-0429-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Anti-Inflammatory Components of the Starfish Astropecten polyacanthus

    Young Ho Kim / Phan Van Kiem / Nguyen Hoai Nam / Young-Sang Koh / Tran Thi Hong Hanh / Sohyun Kim / Tran Hong Quang / Bui Thi Thuy Luyen / Nguyen Xuan Cuong / Chau Van Minh / Nguyen Phuong Thao

    Marine Drugs, Vol 11, Iss 8, Pp 2917-

    2013  Volume 2926

    Abstract: Inflammation is important in biomedical research, because it plays a key role in inflammatory diseases including rheumatoid arthritis and other forms of arthritis, diabetes, heart disease, irritable bowel syndrome, Alzheimer’s disease, Parkinson’s ... ...

    Abstract Inflammation is important in biomedical research, because it plays a key role in inflammatory diseases including rheumatoid arthritis and other forms of arthritis, diabetes, heart disease, irritable bowel syndrome, Alzheimer’s disease, Parkinson’s disease, allergies, asthma, and even cancer. In the present study, we describe the inhibitory effect of crude extracts and steroids isolated from the starfish Astropecten polyacanthus on pro-inflammatory cytokine (Interleukin-12 (IL-12) p40, interleukin-6 (IL-6), and tumor necrosis factor α (TNF-α)) production in lipopolysaccharide (LPS)-stimulated bone marrow-derived dendritic cells (BMDCs). Among those tested, compounds 5 and 7 showed potent inhibitory effects on the production of all three pro-inflammatory cytokines with IC50 values ranging from 1.82 ± 0.11 to 7.00 ± 0.16 μM. Potent inhibitory activities were also observed for compound 1 on the production of IL-12 p40 and IL-6 with values of 3.96 ± 0.12 and 4.07 ± 0.13 μM, respectively, and for compounds 3 and 4 on the production of IL-12 p40 with values of 6.55 ± 0.18 and 5.06 ± 0.16 μM, respectively. Moreover, compounds 2 (IC50 = 34.86 ± 0.31 μM) and 6 (IC50 = 79.05 ± 2.05 μM) exhibited moderate inhibitory effects on the production of IL-12 p40, whereas compounds 3 (IC50 = 22.80 ± 0.21 μM) and 4 (IC50 = 16.73 ± 0.25 μM) moderately inhibited the production of TNF-α and IL-6, respectively.
    Keywords starfish ; Astropecten polyacanthus ; IL-12 p40 ; IL-6 ; TNF-α ; LPS-stimulated BMDCs ; Biology (General) ; QH301-705.5
    Subject code 610
    Language English
    Publishing date 2013-08-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

To top