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Stranica 1 iz 26 rezultatima
Alkaloids derived from genus Veratrum and Peganum of Mongolian origin as multidrug resistance inhibitors of cancer cells.
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Alkaloids comprise one of the largest groups of plant secondary metabolites including vinca alkaloids. The ability of six alkaloids from Veratrum lobelianum, one from Veratrum nigrum and three from Peganum nigellastrum to modify transport activity of MDR1 was studied. Flow-cytometry in a
Jervine inhibits non-small cell lung cancer (NSCLC) progression by suppressing Hedgehog and AKT signaling via triggering autophagy-regulated apoptosis
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Non-small cell lung cancer (NSCLC) has been identified as a leading cause of tumor-associated death around the world. Presently, it is necessary to find effective and safe therapy for its treatment in clinic. Jervine (Jer), a sterodial alkaloid from rhizomes of Veratrum album, exhibits
Modulatory role of resveratrol on cytotoxic activity of cisplatin, sensitization and modification of cisplatin resistance in colorectal cancer cells.
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Colorectal cancer (CRC) is a leading cause of cancer-associated mortality worldwide. Cisplatin (CIS) is one of the most active cytotoxic agents in current use and it has proven efficacy against various human malignancies. However, its clinical usefulness has been restricted by detrimental side
In vivo inhibition of endogenous brain tumors through systemic interference of Hedgehog signaling in mice.
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The full spectrum of developmental potential includes normal as well as abnormal and disease states. We therefore subscribe to the idea that tumors derive from the operation of paradevelopmental programs that yield consistent and recognizable morphologies. Work in frogs and mice shows that Hedgehog
Cyclopamine treatment of full-blown Hh/Ptch-associated RMS partially inhibits Hh/Ptch signaling, but not tumor growth.
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Mutations in the Hedgehog (Hh) receptor Patched (Ptch) are responsible for a variety of tumors, which show ligand-independent stimulation of the Hh/Ptch signaling cascade. Cyclopamine is an alkaloid of the corn lily Veratrum californicum, which blocks activity of the pathway by inhibition of
Of embryos and tumors: Cyclopia and the relevance of mechanistic teratology.
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Embryos and tumors share several characteristics, but embryos differ from tumors in their coordination of cellular- and tissue-level processes, including organized differentiation, remodeling of tissues through apoptosis, and disciplined migrations of cells. Embryonic cellular events are kept on
Cyclopamine: from cyclops lambs to cancer treatment.
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In the late 1960s, the steroidal alkaloid cyclopamine was isolated from the plant Veratrum californicum and identified as the teratogen responsible for craniofacial birth defects including cyclops in the offspring of sheep grazing on mountain ranges in the western United States. Cyclopamine was
Role of resveratrol in prevention and therapy of cancer: preclinical and clinical studies.
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Resveratrol, trans-3,5,4'-trihydroxystilbene, was first isolated in 1940 as a constituent of the roots of white hellebore (Veratrum grandiflorum O. Loes), but has since been found in various plants, including grapes, berries and peanuts. Besides cardioprotective effects, resveratrol exhibits
Pharmacological effect of prohibited combination pair Panax ginseng and Veratrum nigrum on colorectal metastasis in vitro and in vivo.
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BACKGROUND
The pharmacological effect derived from herb-herb interaction is important to constitute the prescription especially in traditional oriental medicine. The relationship of two medicinal herbs is called "couplet medicinals" which is used in pair for the purpose of enhancing the therapeutic
Hedgehog antagonists cyclopamine and dihydroveratramine can be mistaken for each other in Veratrum album.
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A toxic plant, Veratrum album (ssp. viriscens), was found to have an inhibitory effect on Hedgehog (Hh), a developmental signaling pathway that has been shown to be active during development, in adult stem cells and in numerous human tumors. Based on earlier studies it was believed that the known Hh
Development of a monoclonal antibody-based ELISA for the hedgehog inhibitors cyclopamine and KAAD-cyclopamine.
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Cyclopamine (1) was isolated from the plant Veratrum californicum Durand (Liliacea) and identified as the teratogen responsible for severe craniofacial birth defects including cyclops in the offspring of sheep grazing on mountain ranges in central Idaho. More recently, cyclopamine (1) was found to
Identification and characterization of in vitro and in vivo metabolites of steroidal alkaloid veratramine.
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Veratramine, a steroidal alkaloid originating from Veratrum nigrum L., has demonstrated distinct anti-tumor and anti-hypertension effects, however, its metabolism has rarely been explored. The objective of the current study was to provide a comprehensive investigation of its metabolic pathways. The
Gender-Dependent Pharmacokinetics of Veratramine in Rats: In Vivo and In Vitro Evidence.
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Veratramine, a major alkaloid from Veratrum nigrum L., has distinct anti-tumor and anti-hypertension effects. Our previous study indicated that veratramine had severe toxicity toward male rats. In order to elucidate the underling mechanism, in vivo pharmacokinetic experiments and in vitro
From teratogens to potential therapeutics: natural inhibitors of the Hedgehog signaling network come of age.
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Steroidal alkaloids from Veratrum californicum (Durand) are known to exert teratogenic effects (e.g., cyclopia, holoprosencephaly) by blocking the Hedgehog (Hh) signaling pathway, which plays a considerable role in embryonic development and organogenesis. Most surprisingly, recent studies
Resveratrol: a therapeutic promise for cardiovascular diseases.
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The heart is an aerobic organ, and most of the energy required for the contraction and maintenance of ion gradients comes from oxidative phosphorylation. Oxidative stress caused by free radicals plays a crucial role in the pathophysiology associated with atherosclerosis, neoplasia and
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