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Pàgina 1 des de 30 resultats
A Study of the in vitro cytotoxic activity of Gelsemium elegans using human ovarian and breast cancer cell lines.
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The crude methanol extracts of Gelsemium elegans leaves were assessed for their cytotoxic activity using the microculture 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay for cellular viability. This study utilized two different types of human cancer cell lines, CaOV-3 (human
Apoptotic Effect of Koumine on Human Breast Cancer Cells and the Mechanism Involved.
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Koumine is an alkaloid separated from traditional Chinese herb Gelsemium elegans. In this study, anticancer activity and underlying mechanisms were investigated with an extract using human breast cancer cells. The survival rate was reduced in a concentration- and time-dependent manner as assessed by
A synthetic coumarin (4-methyl-7 hydroxy coumarin) has anti-cancer potentials against DMBA-induced skin cancer in mice.
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Scopoletin, an alkaloid separated from ethanolic extract of the medicinal plant, Gelsemium sempervirens (Fam: Loganiaceae) has been reported to have anti-cancer potentials. The synthetic coumarin (4-Methyl-7 hydroxy coumarin) derived from resorcinol and ethyl aceto-acetate in presence of
The analgesic effect and possible mechanisms by which koumine alters type II collagen-induced arthritis in rats.
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Gelsemium elegans Benth. is a toxic plant that has been used as an ancient Chinese herbal remedy for rheumatoid arthritis (RA) and nervous pain, spasticity, skin ulcers, and cancers. Koumine, one of its representative alkaloids, shows numerous promising pharmacological activities, including
Alkaloids from Gelsemium elegans.
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Three new alkaloids, gelsebanine (1), 14alpha-hydroxyelegansamine (2), and 14alpha-hydroxygelsamydine (3), and a new extraction artifact , gelsebamine (4), together with 12 known alkaloids, were isolated from the stems and leaves of Gelsemium elegans. The structures of 1-4 were determined by
Five new koumine-type alkaloids from the roots of Gelsemium elegans.
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Five new koumine-type alkaloids (1-5) along with six known ones were isolated from the roots of Gelsemium elegans. Their structures with absolute configurations were elucidated on the basis of NMR spectroscopy and electronic circular dichroism spectral analyses. The inhibitory effects of compounds
Koumine, Humantenine, and Yohimbane Alkaloids from Gelsemium elegans.
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Nine new alkaloids of the koumine (1-4), humantenine (5-7), and yohimbane (8, 9) types as well as 12 known analogues were isolated from the leaves and vine stems of Gelsemium elegans. Compound 1 is the first N-4-demethyl alkaloid of the koumine type, compound 7 is the first nor-humantenine alkaloid,
Cytotoxic gelsedine-type indole alkaloids from Gelsemium elegans.
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A chemical investigation on the 95% ethanol extract of the aerial part of Gelsemium elegans resulted in the isolation of three new gelsedine-type indole alkaloids, 14β-hydroxygelselenidine (1), 11-methoxygelseziridine (2), and 14β-hydroxygelsedethenine (3).
Cytotoxic gelsedine-type indole alkaloids from Gelsemium elegans.
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The ethanol extract of the leaves and branches of Gelsemium elegans afforded three new gelsedine-type indole alkaloids, 11-methoxy-14,15-dihydroxyhumantenmine (1), 11-methoxy-14,15-dihydroxy-19-oxogelsenicine (2), and 11-methoxy-14-hydroxygelsedilam (3), along with one known alkaloid
Gelsedine-type oxindole alkaloids from Gelsemium elegans and the evaluation of their cytotoxic activity.
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Phytochemical investigation on the 70% EtOH extract of the leaves and branches of Gelsemium elegans resulted into the isolation of five new gelsedine-type oxindole alkaloids, gelseleganins A-E (1-5). The structures of the isolated compounds were established based on 1D and 2D (1H-1H COSY, HMQC, and
New nor-ursane type triterpenoids from Gelsemium elegans.
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Five new nor-ursane type triterpenoids, gelse-norursane A-E, together with twenty known compounds, were isolated from the whole plant of Gelsemium elegans. The structures of new compounds were established as (2R,3R,7R,17S,19R)-2,3,7,19-tetrahydroxy-6-oxo-24-norurs-4(23),12-dien-28-oic acid (1),
Construction and Analysis of circRNA-miRNA-mRNA Molecular Regulatory Networks During Herba Gelsemium elegans Intoxication.
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Gelsemium elegans (Gardner & Champ.) Benth. (GE) has therapeutic effects for pain and malignant tumors but also has high toxicity. Its mechanism of toxicity has not yet been fully clarified, thus limiting its application. Meanwhile, evidence has shown that circRNAs are closely related to
Characterization of absorbed and produced constituents in goat plasma urine and faeces from the herbal medicine Gelsemium elegans by using high-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry.
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Gelsemine, a natural alkaloid extracted from Gelsemium elegans Benth. alleviates neuroinflammation and cognitive impairments in Aβ oligomer-treated mice.
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Macroline, talpinine, and sarpagine alkaloids from Alstonia penangiana. An NMR-based method for differentiating between A. penangiana and A. macrophylla.
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Fourteen previously undescribed alkaloids comprising two N-1-hydroxymethylmacroline alkaloids, one talpinine-type oxindole acetal, a pair of equilibrating talpinine-type oxindole hemiacetals, eight oxidized derivatives of sarpagine- and akuammiline-type indole alkaloids, in addition to
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