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Stran 1 iz 88 rezultatov
Laurenditerpenol, a new diterpene from the tropical marine alga Laurenciaintricata that potently inhibits HIF-1 mediated hypoxic signaling in breast tumor cells.
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The degree of tumor hypoxia correlates with advanced disease stages and treatment resistance. The transcription factor hypoxia-inducible factor-1 (HIF-1) promotes tumor cell adaptation and survival under hypoxic conditions. Therefore, specific HIF-1 inhibitors represent an important new class of
New macrocyclic diterpenes from Euphorbia connata Boiss. with cytotoxic activities on human breast cancer cell lines.
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Acetone:chloroform (1:2) extract of the aerial parts of Euphorbia connata Boiss. (Euphorbiaceae) was investigated for its diterpenoids. This led to the isolation of one known and two new diterpenes, belonging to the pentahydroxy-13(17)-epoxy-8,10(18)-myrsinadiene and
A myrsinol diterpene isolated from Euphorbia prolifera reverses multidrug resistance in breast cancer cells.
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P-glycoprotein (P-gp), a member of ATP-Binding Cassette transporter superfamily, can expel a variety of anti-cancer drugs so that it impairs the effect of cancer chemotherapy and results in multidrug resistance (MDR). The P-gp inhibitors are important to circumvent MDR and improve efficacy of cancer
Epoxy clerodane diterpene inhibits MCF-7 human breast cancer cell growth by regulating the expression of the functional apoptotic genes Cdkn2A, Rb1, mdm2 and p53.
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Systematic analyses of plants that are used in traditional medicine may lead to the discovery of novel cytotoxic secondary metabolites. Diterpene possesses multiple bioactivities; here, epoxy clerodane diterpene (ECD) was isolated from Tinospora cordifolia (Willd.) stem and shown potential
A myrsinol diterpene isolated from a traditional herbal medicine, LANGDU reverses multidrug resistance in breast cancer cells.
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BACKGROUND
LANGDU, a Chinese traditional herbal medicine, was the dried roots of Euphorbia prolifera Buch-Ham. The herbal medicine has been used as anti-cancer and anti-inflammatory drug in local folk medicine for several hundred years.
OBJECTIVE
P-glycoprotein (P-gp) is a transmembrane exporter,
Bioguided discovery and pharmacophore modeling of the mycotoxic indole diterpene alkaloids penitrems as breast cancer proliferation, migration, and invasion inhibitors.
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Marine-derived fungi have proven to be important sources of bioactive natural organohalides. The genus Penicillium is recognized as a rich source of chemically diverse bioactive secondary metabolites. This study reports the fermentation, isolation and identification of a marine-derived Penicillium
Crispene E, a cis-clerodane diterpene inhibits STAT3 dimerization in breast cancer cells.
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Crispene E, a new clerodane-type diterpene, inhibited STAT3 dimerization in a cell-free fluorescent polarisation assay and was found to have significant toxicity against STAT3-dependent MDA-MB 231 breast cancer cell line and selectively inhibited the expression of STAT3 and STAT3 target genes cyclin
Selective targeting of breast cancer cells through ROS-mediated mechanisms potentiates the lethality of paclitaxel by a novel diterpene, gelomulide K.
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Defects in apoptotic pathways confer resistance to tubulin-binding agents via downregulation of caspases or overexpression of antiapoptotic factors, urging the need for novel agents acting on an alternative pathway. The purpose of this study was to investigate whether induction of ROS can induce
Indole diterpene alkaloids as novel inhibitors of the Wnt/β-catenin pathway in breast cancer cells.
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Penitrems are indole diterpene alkaloids best known for their BK channel inhibition and tremorgenic effects in mammals. In a previous study, penitrems A-F (1-5), their biosynthetic precursors, paspaline (6) and emindole SB (7), and two brominated penitrem analogs 8 and 9 demonstrated promising in
Associations between Coffee Products and Breast Cancer Risk: a Case-Control study in Hong Kong Chinese Women.
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Coffee contains caffeine and diterpenes that were associated with decreased breast cancer risk, but results remained inconsistent. The study purpose was to investigate the associations between coffee products and breast cancer risk among Hong Kong Chinese women. We conducted a hospital-based
Cytotoxic Lathyrane-Type Diterpenes from Seeds of Euphorbia lathyris.
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We isolated two new lathyrane-type diterpenes L27 (1) and L28 (2) along with seven known compounds (3-9) from the seeds of Euphorbia lathyris. These compounds were identified by NMR, high-resolution electrospray ionisation (HR-ESI)-MS as well as IR spectroscopy. Compounds 1 and 2 were assigned NMR
Carnosic acid cooperates with tamoxifen to induce apoptosis associated with Caspase-3 activation in breast cancer cells in vitro and in vivo.
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Tamoxifen is known as a standard therapeutic treatment for estrogen receptor-positive breast cancer, which down-regulates breast cancer mortality by 31% approximately. Carnosic acid is a phenolic diterpene, which has anti-cancer, anti-inflammation, anti-diabetic and anti-bacterial properties,
Diterpenes from the bark and seeds of Colophospermum mopane.
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The CHCl3 extract of the bark and seeds of Colophospermum mopane gave three new diterpenes, dihydrogrindelic acid and dihydrogrindelaldehyde and methyl labd-13E-en-15-oate. The structures were assigned on the basis of detailed spectroscopic data analyses. The aldehyde showed significant cytotoxic
Two new diterpenes from Caesalpinia minax Hance.
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Two new cassane-type diterpenes, Caesalpinolide F (1) and Caesalpinolide G (2) were isolated from Caesalpinia minax Hance. Their structures were elucidated on the basis of 1D and 2D NMR, MS and CD analysis. Compounds 1 and 2 were tested against colon carcinoma (HCT-8) and breast cancer (MCF-7) human
The new cassane-type diterpenes from Caesalpinia minax.
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Four new cassane-type diterpenes, Neocaesalpin S (1), Neocaesalpin T (2), Neocaesalpin U (3), and Neocaesalpin V (4) were isolated from Caesalpinia minax HANCE together with seven known compounds Neocaesalpin A (5), Neocaesalpin K (6), Neocaesalpin L (7), Neocaesalpin M (8), Neocaesalpin O (9),
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