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Stran 1 iz 4671 rezultatov
Ipobscurine, an indole alkaloid from Ipomoea obscura, inhibits tumor cell invasion and experimental metastasis by inducing apoptosis.
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In the present study, we demonstrate that ipobscurine, an indole alkaloid fraction isolated from Ipomoea obscura, can reduce the formation of B16F-10 melanoma-induced metastatic nodules and inhibit the proliferation, migration, and invasion of B16F-10 melanoma cells in vitro, possibly by inhibiting
Pyrrole alkaloids with potential cancer chemopreventive activity isolated from a goji berry-contaminated commercial sample of African mango.
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Bioassay-guided fractionation of a commercial sample of African mango (Irvingia gabonensis) that was later shown to be contaminated with goji berry (Lycium sp.) led to the isolation of a new pyrrole alkaloid, methyl 2-[2-formyl-5-(hydroxymethyl)-1H-pyrrol-1-yl]propanoate, 1, along with seven known
Alkaloids as important scaffolds in therapeutic drugs for the treatments of cancer, tuberculosis, and smoking cessation.
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Alkaloid molecules can act, depending on a type of amine functionality present in alkalods, as either hydrogenacceptor or hydrogen-donor for hydrogen bonding that is critically important for the interaction (binding) between targets (enzymes, proteins and receptors) and drugs (ligands). Because of
Molecular network profiling of U373MG human glioblastoma cells following induction of apoptosis by novel marine-derived anti-cancer 1,2,3,4-tetrahydroisoquinoline alkaloids.
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BACKGROUND
Glioblastoma is the most aggressive form of brain tumors showing resistance to treatment with various chemotherapeutic agents. The most effective way to eradicate glioblastoma requires the concurrent inhibition of multiple signaling pathways and target molecules involved in the
A marine sponge alkaloid derivative 4-chloro fascaplysin inhibits tumor growth and VEGF mediated angiogenesis by disrupting PI3K/Akt/mTOR signaling cascade.
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Tumor angiogenesis and PI3K/Akt/mTOR pathway are two major molecular objectives for the treatment and management of breast cancer. Here we first time report the molecular mechanism of a marine sponge alkaloid derivative 4-chloro fascapysin (4-CF) for its anticancer and antiangiogenesis potential. It
Induction of endogenous avian tumor virus gene expression by pyrrolizidine alkaloids.
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The pyrrolizidine alkaloids (PA) are toxic compounds which occur naturally in plant species throughout the world. They have been implicated as both carcinogenic and mutagenic agents. An active metabolite of the alkaloids, the pyrrole, which is a strong alkylating agent, is thought to be the
Cancer chemopreventive activity of acridone alkaloids on Epstein-Barr virus activation and two-stage mouse skin carcinogenesis.
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Seventeen acridone alkaloids isolated from the Rutaceous plants were tested for their inhibitory activities against Epstein-Barr virus early antigen activation induced by 12-O-tetradecanoylphorbol-13-acetate in Raji cells. Some prenylated acridones were found to have remarkably potent activities.
Alkaloids from Pachysandra terminalis inhibit breast cancer invasion and have potential for development as antimetastasis therapeutic agents.
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The aim of the present study was to identify potentially useful natural compounds for the development of novel therapeutic agents to inhibit metastasis. A phytochemical investigation of Pachysandra terminalis resulted in the isolation of seven new pregnane alkaloids, terminamines A-G (1-7), and
Two new isoquinoline alkaloids from Scolopendra subspinipes mutilans induce cell cycle arrest and apoptosis in human glioma cancer U87 cells.
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Two new isoquinoline alkaloids 1-2 and seven known compounds 3-9 were isolated from the ethanol extract of centipede Scolopendra subspinipes mutilans L. Koch. The structures were elucidated by a combination of spectroscopic analyses including 1D and 2D NMR, and HRESIMS. Compounds 1-2 exhibited good
Stimulation of human monocyte oxidative burst and related cytotoxicity by tumor-promoting and non-tumor-promoting diterpene esters, indole alkaloids and polyacetate-type agents.
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Human peripheral blood monocytes were cultured and exposed to plant diterpenes, indole alkaloids and polyacetates with various degrees of tumor-promoting activity. The effect of the above-mentioned encounter on monocyte function was examined, as expressed by H2O2 production and lysis of dog
Voacamine, an alkaloid extracted from Peschiera fuchsiaefolia, inhibits P-glycoprotein action in multidrug-resistant tumor cells.
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Multidrug resistance (MDR) in tumor cells is generally associated with increased efflux of the cytotoxic compounds, due to the activation of mechanisms of intracellular transport and to the overexpression of surface proteins, such as P-glycoprotein (Pgp), which act as ATP-dependent molecular pumps.
Voacamine, a bisindolic alkaloid from Peschiera fuchsiaefolia, enhances the cytotoxic effect of doxorubicin on multidrug-resistant tumor cells.
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Multidrug-resistance (MDR) is largely caused by the efflux of therapeutics from the tumor cell by means of P-glycoprotein (P-gp), resulting in reduced efficacy of the chemotherapy. In order to overcome MDR, substances, such as verapamil and cyclosporin A (CsA), were employed. As these P-gp
Reversal effect of isotetrandrine, an isoquinoline alkaloid extracted from Caulis Mahoniae, on P-glycoprotein-mediated doxorubicin-resistance in human breast cancer (MCF-7/DOX) cells.
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This study investigated the reversal effect of isotetrandrine, an isoquinoline alkaloid extracted from Caulis mahoniae, on P-glycoprotein-mediated multidrug resistance in human breast cancer doxorubicin-resistant (MCF-7/DOX) cells. RT-PCR assay and immunity histochemistry assay were used to
Inhibitory effects of phenolic alkaloids of Menispermum dauricum on gastric cancer in vivo.
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The present study was conducted to investigate effects and mechanisms of action of phenolic alkaloids of Menispermum dauricum (PAMD) on gastric cancer in vivo. In vitro, cell apoptosis of human gastric cancer cell line SGC-7901 was observed using fluorescence staining. In vivo, a mice model was
Molecular docking analysis of alkaloid compounds with beta-catenin towards the treatment of colon cancer.
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It is known that beta-catenin is associated with fibromatosis, sarcoma and mesenchymal tumor. Therefore, it is of interest to design an effective inhibtitor to the target protein beta-catenin. In this study, we report the molecular docking analysis of alkaloid compounds (aristolochicacid,
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