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Страна 1 од 251 резултати
Anticancer activity of some polyamine derivatives on human prostate and breast cancer cell lines.
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The aim of this study was to expand our knowledge about anticancer activity of some polyamine derivatives with quinoline or chromane as terminal moieties. Tested compounds were evaluated in vitro towards metastatic human prostate adenocarcinoma (PC3), human carcinoma (DU145) and mammary gland
Targeting polyamine biosynthetic pathway through RNAi causes the abrogation of MCF 7 breast cancer cell line.
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The diamine putrescine and polyamines, spermidine (triamine) and spermine (tetraamine) are small organic polycations that play an indispensable role in key cellular processes such as the regulation of growth, differentiation, and macromolecular functions. Elevated levels of polyamines (PAs) have
Targeting the polyamine pathway-"a means" to overcome chemoresistance in triple-negative breast cancer.
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Triple-negative breast cancer (TNBC) is characterized by its aggressive biology, early metastatic spread, and poor survival outcomes. TNBC lacks expression of the targetable receptors found in other breast cancer subtypes, mandating use of cytotoxic chemotherapy. However, resistance to chemotherapy
Reduction of the putative CD44+CD24- breast cancer stem cell population by targeting the polyamine metabolic pathway with PG11047.
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Cancer stem cells (CSCs) are considered to be of particular concern in cancer as they possess inherent properties of self-renewal and differentiation, along with expressing certain genes related to a mesenchymal phenotype. These features favour the promotion of tumour recurrence and metastasis in
Interaction between Polyamines and the Mitogen-Activated Protein Kinase Pathway in the Regulation of Cell Cycle Variables in Breast Cancer Cells.
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Inhibition of polyamine biosynthesis with alpha-difluoromethylornithine (DFMO) has been shown to inhibit proliferation of breast cancer cells although its mechanism of action has not been fully elucidated. To address this issue, we tested the effects of DFMO on cell cycle variables of MDA-MB-435
Synchronization of breast cancer cell proliferation in vivo by combined hormonal and polyamine manipulation.
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Optimal synchronization of breast cancer cell proliferation by hormonal means may be limited by cellular heterogeneity in sensitivity to the multistep activation of growth following initial hormone binding to the receptor. We hypothesized that induced synchronous growth may be improved by combined
Synthesis and biological activities of bisnaphthalimido polyamines derivatives: cytotoxicity, DNA binding, DNA damage and drug localization in breast cancer MCF 7 cells.
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New bisoxynaphthalimidopolyamines (BNIPOPut, BNIPOSpd and BNIPOSpm) were synthesized. Their cytotoxic properties were evaluated against breast cancer MCF 7 cells and compared with bisnaphthalimidopolyamines BNIPSpd and BNIPSpm. Among the bisoxynaphthalimido polyamines, BNIPOSpm and BNIPOSpd
Polyamine involvement in breast cancer phenotype.
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In this review, we will summarize current evidence implicating the polyamine pathway in two critical aspects of breast cancer biology, e.g. mammary carcinogenesis and tumor progression. We believe that the findings reported here provide a strong rationale for further exploring the role of
Correlation between polyamines and apoptosis among Egyptian breast cancer patients.
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OBJECTIVE
The polyamines putrescine, spermidine, and spermine, play an important role in cell proliferation, differentiation, and transformation. The aim of this study is to correlate the polyamines with apoptosis and clinico-pathologic events in Egyptian breast cancer patients.
METHODS
PUT, SPD,
Clinical aspects of cell death in breast cancer: the polyamine pathway as a new target for treatment.
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Because intracellular polyamines have a critical role in cell proliferation and death pathways, the polyamine metabolic pathway represents a potential target for intervention in cancers. A number of polyamine analogues have been identified that downregulate polyamine synthesis and enhance polyamine
Interactions between growth factor secretion and polyamines in MCF-7 breast cancer cells.
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Polyamines may be involved in hormone-dependent breast cancer cell proliferation. The antiestrogen 4-hydroxy-tamoxifen and the polyamine synthesis inhibitor alpha-difluoromethylornithine (DFMO) inhibited MCF-7 growth, and this effect was additive. Transforming growth factor beta (TGF-beta) levels
Relationships between polyamine, deoxyribonucleic acid and oestrogen receptor binding site concentrations in human breast tumours.
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Concentrations of polyamines, DNA and oestrogen receptor (ER) binding sites have been estimated in 23 malignant and 2 benign breast tumours. Polyamine and DNA concentrations, expressed per unit wet weight of tissue, were significantly higher in ER-poor (less than 10 fmol/mg cytosol protein) than in
Effects of Polyamines on TNFalpha- or Tamoxifen-induced Apoptosis in Human Breast Cancer Cells.
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OBJECTIVE
To investigate the effects of polyamines on tumor necrosis factor alpha (TNFalpha)-or tamoxifen (TAM)-induced apoptosis in estrogen receptor (ER)-positive MCF- 7 and ER-negative MDA-MB-231 human breast cancer cells.
METHODS
Cell viability was assessed by using MTT assay. Reactive oxygen
Role of polyamines in the function of nuclear transcription factor NF-kappaB in breast cancer cells.
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The aim of the work was the investigation of the influence of polyamines on formation of nuclear transcription factor kappa B (NF-kappaB) complex with specific DNA-sequences nuclear response elements (NRE), and the study of content of p50 and p65 (NF-kappaB subunits) in breast tumor cells under
[Characteristics of polyamine biosynthesis regulation and tumor growth rate in hormone-dependant grafted breast tumors of mice and rats].
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Effect of the inhibitors of polyamines biosynthesis on completely or partially hormone-dependant breast tumors (mouse Ca755 carcinoma and Walker W-256 carcinosarcoma) is essentially special: in contrary to hormone-dependant tumors, this effect may be not only breaking but stimulating as well.
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