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Страна 1 од 28 резултати
Cardenolide glycosides from Pergularia tomentosa and their proapoptotic activity in Kaposi's sarcoma cells.
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Continuing our investigations on plants belonging to the Asclepiadaceae family, three new cardenolide glycosides, 3'-O-beta-D-glucopyranosylcalactin (1), 12-dehydroxyghalakinoside (2), and 6'-dehydroxyghalakinoside (3), along with the known ghalakinoside (4) and calactin (5), were isolated from the
Solasodine glycosides. Selective cytotoxicity for cancer cells and inhibition of cytotoxicity by rhamnose in mice with sarcoma 180.
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BEC, a standard mixture of solasodine glycosides is effective in vivo against murine sarcoma 180 (S180), whereas the aglycone solasodine at equimolar concentrations is ineffective. The efficacy of BEC against S180 in vivo can be inhibited by rhamnose. Mice which are in their terminal stage with S180
Steroidal glycosides from the underground parts of Allium ursinum L. and their cytostatic and antimicrobial activity.
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The aim of this study was the isolation and structural elucidation of steroidal glycosides from the underground parts of ramson Allium ursinum L. The structures of the isolated compounds were established based upon chromatographic methods and 1D- and 2D-NMR, MS and IR analyses. The mixture of two
The secalosides, novel tumor cell growth inhibitory glycosides from a pollen extract.
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The pollen of rye (Secale cereale) was shown to contain a biologically highly active family of glycosides called the secalosides. Secalosides A and B (1), both of molecular formula C46H51-NO24, were found to be epimeric esters of (2-oxo-3-indolyl)acetic acid (4). They are made up, in addition to
Solasodine rhamnosyl glycosides cause apoptosis in cancer cells. Do they also prime the immune system resulting in long-term protection against cancer?
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Solasodine rhamnosyl glycosides (SRGs) induce apoptosis in a wide variety of cancer cells and are more effective than many well-established anticancer agents. Combination therapy of SRGs with cisplatin treats cisplatin-resistant cells such as lung cancer and breast cancer cells. Anticancer therapies
Intercedensides A-C, three new cytotoxic triterpene glycosides from the sea cucumber Mensamaria intercedens Lampert.
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Three new triterpene glycosides, intercedensides A (1), B (2), and C (3), were isolated from the sea cucumber Mensamria intercedens Lampert, which is found in the South China Sea, and their structures have been elucidated by spectroscopic analysis (NMR and ESIMS) and chemical transformations.
Synthesis and collagenase inhibition of new glycosides of aranciamycinone: the aglycon of the naturally occurring antibiotic aranciamycin.
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Glycosides of aranciamycinone were prepared by glycosylation with sugar acetates and trimethylsilyl triflate in dichloromethane. Glycosides of the following sugars were prepared: alpha-L-rhamnopyranose, beta-D-glucopyranose, beta-D-ribopyranose, beta-D-xylopyranose, alpha-L-fucopyranose,
[Changes in tumor cell sensitivity to the action of triterpene glycosides in liposomes].
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The effect of the increased levels of cholesterol in ascites tumor cells of mouse sarcoma 37 on the cytochemical activity of 4 triterpene glycosides was studied. A definite correlation between the increase in the cholesterol level in the cells and the glycoside activity was noted. The effect
[Studies on antitumor activities of triterpene glycoside colochiroside A from sea cucumber Colochirus anceps].
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OBJECTIVE
To study the antitumor activities of the triterpene glycoside colochiroside A (CA) from the sea cucumber Colochirus anceps.
METHODS
The tests of antitumor activities in vitro and in vivo were applied to demonstrate the effect of CA.
RESULTS
The preliminary cytotoxic assay of CA exhibited
New unusual pregnane glycosides with antiproliferative activity from Solenostemma argel.
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Seven new 15-keto pregnane glycosides, namely Stemmosides E--K, were isolated from Solenostemma argel. Stemmosides E--J are characterized by the occurrence of an uncommon 14 beta proton configuration while stemmosides E and F possess in addition a rare enolic function in C-16. On the other hand,
The trisaccharide beta-D-GlcpNAc-(1----2)-alpha-D-Manp-(1----6)-beta-D-Manp, as its 8-methoxycarbonyloctyl glycoside, is an acceptor selective for N-acetylglucosaminyltransferase V.
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Incubation of the trisaccharide acceptor, beta-D-GlcpNAc-(1----2)-alpha-D-Manp-(1----6)-beta-D-Manp-O( CH2)8CO2Me with sonicates of Rous sarcoma-transformed baby-hamster kidney cells, which contain N-acetylglucosaminyltransferase V activity, resulted in the production of
Anti-angiogenic effect of triterpenoidal saponins from Polygala senega.
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Senegasaponins [senegin II (1), senegin III (2), senegin IV (3), senegasaponin a (4), and senegasaponin b (5)] from Polygala senega were re-discovered as selective anti-proliferative substances against human umbilical vein endothelial cells (HUVECs). Senegasaponins (1-5) showed anti-proliferative
Targeting UHRF1-dependent DNA repair selectively sensitizes KRAS mutant lung cancer to chemotherapy
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Kirsten rat sarcoma virus oncogene homolog (KRAS) mutant lung cancer remains a challenge to cure and chemotherapy is the current standard treatment in the clinic. Hence, understanding molecular mechanisms underlying the sensitivity of KRAS mutant lung cancer to chemotherapy could help uncover unique
Glycans with Antiviral Activity from Marine Organisms.
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There remains today a critical need for new antiviral agents, particularly in view of the alarming increase in drug resistance and associated issues. The marine environment has been a prolific contributor towards the identification of novel therapeutic agents in the recent few decades. Added to
Anti-proliferative effect of leaf extracts of Eucalyptus citriodora against human cancer cells in vitro and in vivo.
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Six different extracts from Eucalyptus citriodora leaves were investigated for their anticancer effect. Extracts were prepared using a range of polar and non-polar solvents to leach out maximum active components. Phytochemical analysis of the extracts revealed the presence of anthraquinones, cardiac
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