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narciclasine/krebs
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Narciclasine as well as other Amaryllidaceae isocarbostyrils are promising GTP-ase targeting agents against brain cancers.
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The anticancer activity of Amaryllidaceae isocarbostyrils is well documented. At pharmacological concentrations, that is, approximately 1 μM in vitro and approximately 10 mg/kg in vivo, narciclasine displays marked proapoptotic and cytotoxic activity, as does pancratistatin, and significant in vivo
Identification of narciclasine from Lycoris radiata (L'Her.) Herb. and its inhibitory effect on LPS-induced inflammatory responses in macrophages.
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Lycoris radiata (L'Her.) Herb. (L. radiata) was traditionally used as a folk medicine in China for treatment of Alzheimer's disease. However, the specific component responsible for its considerable toxicity remained unclear thus restricting its clinical trials. Narciclasine (NCS) was isolated from
Beneficial role of insect-derived bioactive components against inflammation and its associated complications (colitis and arthritis) and cancer.
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Insect-based bioactive components are emerging as novel sources of drugs, effective against various diseases. Inflammation is considered to be an innate immune response developed by different organisms against foreign pathogens and cellular stress. However, repetitive elevated inflammation is
Narciclasine inhibits angiogenic processes by activation of Rho kinase and by downregulation of the VEGF receptor 2.
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The process of angiogenesis is involved in several pathological conditions, such as tumor growth or age-related macular degeneration. Although the available anti-angiogenic drugs have improved the therapy of these diseases, major drawbacks, such as unwanted side effects and resistances, still exist.
In vitro and in vivo behaviour of narciclasine released from matrices based on poly (2-hydroxyethyl methacrylate).
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Narciclasine (1,2,3,7-tetrahydroxy-8,9-methylendioxy-1,2,3,4-tetrahydrophena ntridone) is a natural substance with strong antimitotic effects on cells and potential antitumor activity. Its release form a hydrogel matrix was studied with the purpose of avoiding the concentration spikes of the
Homoharringtonine induced immune alteration for an Efficient Anti-tumor Response in Mouse Models of Non-small Cell Lung Adenocarcinoma Expressing Kras Mutation.
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Homoharringtonine (HHT), an inhibitor of protein synthesis, has been used to treat leukemia. Its therapeutic effects on non-small cell lung adenocarcinoma carrying KRAS mutation and their immune system are less understood. The present study examined the therapeutic efficacy and the immune effects of
Structure-activity relationship analysis of novel derivatives of narciclasine (an Amaryllidaceae isocarbostyril derivative) as potential anticancer agents.
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Narciclasine (1) is a plant growth regulator that has been previously demonstrated to be proapoptotic to cancer cells at high concentrations (> or = 1 microM). Data generated in the present study show that narciclasine displays potent antitumor effects in apoptosis-resistant as well as in
Narciclasine - an Amaryllidaceae Alkaloid with Potent Antitumor and Anti-Inflammatory Properties.
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The isocarbostyril alkaloid narciclasine, also known as lycoricidinol, was discovered in Narcissus species (Amaryllidaceae) in 1967. A few years later, the 60S subunit of ribosomes, and thus protein biosynthesis, were shown to be directly targeted by narciclasine. Due to its selective and highly
Narciclasine-4-O-β-D-xylopyranoside, a new narciclasine glycoside from Zephyranthes minuta.
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A new narciclasine glycoside, narciclasine-4-O-β-D-xylopyranoside (1) was characterised along with four known alkaloids pancratistatin (2), 1-O-(3-hydroxybutyryl) pancratistatin (3), vittatine (4), 9-O-demethylgalanthine (5) from Zephyranthes minuta. Their structures were established on the basis of
Antineoplastic agents. 454. Synthesis of the strong cancer cell growth inhibitors trans-dihydronarciclasine and 7-deoxy-trans-dihydronarciclasine (1a).
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To further pursue the antineoplastic leads offered by our isolation of trans-dihydronarciclasine (1a) and 7-deoxy-trans-dihydronarciclasine (1c) from two medicinal plant species of the Amaryllidaceae family, a practical palladium-catalyzed hydrogenation procedure was developed for the synthesis of
Human cytochrome P450 liability studies of trans-dihydronarciclasine: a readily available, potent, and selective cancer cell growth inhibitor.
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The cytochrome P45O activities of the naturally occurring Amaryllidaceae alkaloid narciclasine (3), isolated from Narcissus pseudonarcissus, and synthetic derivative trans-dihydronarciclasine (5) are reported. While narciclasine was found to possess potent inhibitory activity to human CYP3A4, its
Isolation and structural modification of 7-deoxynarciclasine and 7-deoxy-trans-dihydronarciclasine.
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As an extension of structure-activity relationship studies of pancratistatin (1), various techniques were first evaluated for separating the mixtures of 7-deoxynarciclasine (2b) and 7-deoxy-trans-dihydronarciclasine (3a) isolated from Hymenocallis littoralis. An efficient solution for that otherwise
Antineoplastic agents. 587. Isolation and structure of 3-epipancratistatin from Narcissus cv. Ice Follies.
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Bioassay-guided (cancer cell line) separation of an extract prepared from Narcissus cv. Ice Follies (from The Netherlands) led to the isolation of a new Amaryllidaceae isocarbostiryl, 3-epipancratistatin (1b), as well as narciclasine (2). This Narcissus cultivar was found to be a good source of
Antineoplastic agents. 527. Synthesis of 7-deoxynarcistatin, 7-deoxy-trans-dihydronarcistatin, and trans-dihydronarcistatin 1(1).
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The synthesis of sodium narcistatin (8) was improved (88% overall yield) and the modified reaction sequence was utilized to synthesize three new 3,4-cyclic phosphate prodrugs, sodium 7-deoxynarcistatin (5), sodium 7-deoxy-trans-dihydronarcistatin (6), and sodium trans-dihydronarcistatin (7). The
Antineoplastic agents. 553. The Texas grasshopper Brachystola magna.
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Bioassay (P388 lymphocytic leukemia cell line and human cancer cell lines) guided separation of an extract prepared from the previously chemically uninvestigated Texas grasshopper Brachystola magna led to isolation of the cancer cell growth inhibitory pancratistatin (1), narciclasine (2), and
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