polyacetylene/leoicéime

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AiltTrialacha cliniciúlaPaitinní

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Leathanach 1 ó 16 torthaí

Suppression of U937 human monocytic leukemia cell growth by dideoxypetrosynol A, a polyacetylene from the sponge Petrosia sp., via induction of Cdk inhibitor p16 and down-regulation of pRB phosphorylation.

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Logáil Isteach / Cláraigh

Dideoxypetrosynol A, a polyacetylene from the marine sponge Petrosia sp., is known to exhibit significant selective cytotoxic activity against a small panel of human tumor cell lines, the mechanisms of which however, are poorly understood. The aim of the present study was to further elucidate the

Inhibition of cyclooxygenase-2 and telomerase activities in human leukemia cells by dideoxypetrosynol A, a polyacetylene from the marine sponge Petrosia sp.

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Logáil Isteach / Cláraigh

Dideoxypetrosynol A, a polyacetylene from the marine sponge Petrosia sp., is known to exhibit significant selective cytotoxic activity against several human cancer cell lines. In the present study, we investigated further possible mechanisms by which dideoxypetrosynol A exerts its anti-proliferative

Effects of bioactive compounds from carrots (Daucus carota L.), polyacetylenes, beta-carotene and lutein on human lymphoid leukaemia cells.

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Logáil Isteach / Cláraigh

New therapies for leukaemia are urgently needed. Carrots have been suggested as a potential treatment for leukaemia in traditional medicine and have previously been studied in other contexts as potential sources of anticancer agents. Indicating that carrots may contain bioactive compounds, which may

Polyacetylenes from the Roots of Swietenia macrophylla King.

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Logáil Isteach / Cláraigh

A phytochemical investigation of the roots of Swietenia macrophylla led to the isolation of seven polyacetylenes, including five new compounds (1-5) and two known ones (6-7). Their structures were elucidated by extensive spectroscopic analysis and detailed

Polyacetylene diols with antiproliferative and driving Th1 polarization effects from the marine sponge Callyspongia sp.

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Logáil Isteach / Cláraigh

A screening of 30 crude extracts of marine sponges against human promyelocytic leukemia cells (HL-60) yielded an EtOAc extract of the sponge Callyspongia sp. (Callyspongiidae) with significant activity. Further bioassay-guided fractionation of the EtOAc extract led to the isolation of three

Montiporic acids A and B, cytotoxic and antimicrobial polyacetylene carboxylic acids from eggs of the scleractinian coral Montipora digitata.

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Logáil Isteach / Cláraigh

Two new polyacetylene carboxylic acids, montiporic acids A (1) and B (2), have been isolated from the eggs of the scleractinian coral Montipora digitata and their structures elucidated on the basis of spectroscopic data. They exhibited antimicrobial activity against Escherichia coli and cytotoxicity

Two new polyacetylene derivatives from the Red Sea sponge Xestospongia sp.

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Logáil Isteach / Cláraigh

Two new polyacetylenes (1 and 2), along with two known C-30 steroids (3 and 4) were identified from the Red Sea sponge, Xestospongia sp. The chemical structures were determined based on extensive spectroscopic measurements 1D (1H, 13C and DEPT) and 2D (COSY, HSQC and HMBC) NMR, UV, IR and MS. The

Induction of apoptosis in human promyelocytic leukemia HL60 cells by panaxynol and panaxydol.

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Logáil Isteach / Cláraigh

Panaxynol and panaxydol are naturally occurring polyacetylenes, isolated from the lipophilic fractions of Panax notoginseng, that exert anti-proliferative effects against malignant cells. However, to the best of our knowledge, no study concerning the inhibitory effects of the two polyacetylenes on

Polyacetylenes from Bupleurum longiradiatum.

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Logáil Isteach / Cláraigh

Eight new polyacetylenes (1-8) and six known polyacetylenes were isolated from the entire parts of Bupleurum longiradiatum, a poisonous plant. The structures of the new compounds were determined by spectroscopic data interpretation. The absolute configuration of the known compound bupleurotoxin (9)

Bioactive chemicals from carrot (Daucus carota) juice extracts for the treatment of leukemia.

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Logáil Isteach / Cláraigh

Overwhelming evidence indicates that consumption of fruits and vegetables with antioxidant properties correlates with reduced risk for cancers, including leukemia. Carrots contain beneficial agents, such as β-carotene and polyacetylenes, which could be effective in the treatment of leukemia. This

Polyacetylenes from the Apiaceae vegetables carrot, celery, fennel, parsley, and parsnip and their cytotoxic activities.

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Logáil Isteach / Cláraigh

A dichloromethane extract of root celery yielded falcarinol, falcarindiol, panaxydiol, and the new polyacetylene 8-O-methylfalcarindiol. The structure of the new compound was established by one- and two-dimensional (1D and 2D) NMR, mass spectrometry, and optical rotation data. Nonpolar extracts of

Inhibition of Human Pancreatic Cancer Cell Proliferation by Devil's Club Oplopanax horridus and Its Polyacetylene Bioactive Compound.

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Logáil Isteach / Cláraigh

Devil's club Oplopanax horridus (DC) is a close relative of ginseng; its inner root and stem bark extract showed antiproliferation activity on human leukemia, ovarian, breast and colon cancer cells. We study here the effects of DC 70% ethanol extract alone, or in combination with cisplatin,

Chemical Constituents of the Roots and Rhizomes of Saposhnikovia divaricata and their Cytotoxic Activity.

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Logáil Isteach / Cláraigh

Phytochemical investigation of the MeOH extract of the roots and rhizomes of Saposhnikovia divaricata (Umbelliferae) resulted in the isolation of six chromons (1-6)-and five polyacetylene derivatives (7-11). Compounds 9 and 11 were isolated from S. divaricate for the first time. The chromon

Cytotoxic acetylenes from Panax quinquefolium.

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Logáil Isteach / Cláraigh

Three new cytotoxic polyacetylenes, PQ-1 (1), PQ-2 (2) and PQ-3 (3), have been isolated from Panax quinquefolium. The structures of these acetylenes were determined by analyses of their 1H-1H and 1H-13C COSY spectra. All these compounds exhibited strong cytotoxic activities against leukemia cells (L

Studies on panax acetylenes: absolute structure of a new panax acetylene, and inhibitory effects of related acetylenes on the growth of L-1210 cells.

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Logáil Isteach / Cláraigh

A new Panax acetylene, 3-oxo-PQ-1 (1), was isolated from Panax quinquefolium. The absolute configurations of 3-oxo-PQ-1 (1) and PQ-1 (2) were determined to be (9R,10R) and (3R,9R,10R), respectively, by synthesizing 1 and 2 starting from D-(-)-diethyl tartrate, and by synthesizing their stereoisomers

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