anthracene/hypoxia

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Hypoxia and its downstream targets in DMBA induced mammary carcinoma: protective role of Semecarpus anacardium nut extract.

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Tumors are usually exposed to a hypoxic microenvironment due to their irregular growth and abnormal vascular supply. Under hypoxia, gene regulation (selective activation and inactivation of genes) plays an important role in maintenance of tumor. Multiple hypoxic and angiogenic growth factors are

Green tea polyphenol epigallocatechin-3 gallate (EGCG) affects gene expression of breast cancer cells transformed by the carcinogen 7,12-dimethylbenz[a]anthracene.

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Since the 1980s, the incidence of late-onset breast cancer has been increasing in the United States. Known risk factors, such as genetic modifications, have been estimated to account for approximately 5 to 10% of breast cancer cases, and these tend to be early onset. Thus, exposure to and

Cytoprotection by glycine against hypoxia-induced injury in cultured hepatocytes.

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The aim of this study was to investigate the mechanism of cytoprotection by glycine against hypoxia-induced hepatocellular injury. Incubation under hypoxic conditions (95% N2 and 5% CO2) for 5 h induced about 50% cell death, but administration of glycine remarkably reduced hepatocellular death

Inhibition of poly(ADP-ribose) polymerase modulates tumor-related gene expression, including hypoxia-inducible factor-1 activation, during skin carcinogenesis.

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Poly(ADP-ribose) polymerase (PARP)-1, an enzyme that catalyzes the attachment of ADP ribose to target proteins, acts as a component of enhancer/promoter regulatory complexes. In the present study, we show that pharmacologic inhibition of PARP-1 with

Effect of hypoxia and acidosis on the cytotoxicity of mitoxantrone, bisantrene and amsacrine and their platinum complexes at normal and hyperthermic temperatures.

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In an effort to synthesize drugs which would become much more cytotoxic at clinically achievable hyperthermic temperatures, complexes of the tetrachloro-platinum(II) dianion were made with two anthracene dye derivatives, MITOX and BISANT, and the acridine dye derivative m-AMSA. As compared with the

GLA supplementation regulates PHD2 mediated hypoxia and mitochondrial apoptosis in DMBA induced mammary gland carcinoma.

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The aim of the present study is to evaluate the effect of gamma linolenic acid (GLA) on mitochondrial mediated death apoptosis, hypoxic microenvironment and cholinergic anti-inflammatory pathway against 7, 12-dimethylbenz (a) anthracene (DMBA) induced mammary gland carcinoma. The effects of GLA were

Correlation of regional disease and in vivo PO2 in rat mammary adenocarcinoma.

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A knowledge of the distribution of oxygen tension (PO2) and vascularization in neoplasia has been fundamental to understanding relationships between tumor growth, hypoxia, and therapy. We have combined recessed oxygen microcathode and freeze-substitution techniques to correlate in situ PO2 profiles

Functional characterization of human cytochrome P450 2S1 using a synthetic gene-expressed protein in Escherichia coli.

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Human cytochrome P450 2S1 was recently identified and shown to be inducible by 2,3,7,8-tetrachlorodibenzo-p-dioxin and hypoxia. It is highly expressed in epithelial cells of tissues that are exposed to the environment and in many tumors of epithelial origin. The biological function of CYP2S1 has not

Phosphorescent ruthenium complexes with bromopyrene unit that enhance oxygen sensitivity.

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Ruthenium complexes are very useful phosphorescent probes for the visualization of hypoxia. We designed and synthesized three ruthenium complexes possessing bromopyrene, naphthalene, or anthracene units to improve the oxygen response. These ruthenium complexes provided strong phosphorescence under

Mammalian target of rapamycin activator RHEB is frequently overexpressed in human carcinomas and is critical and sufficient for skin epithelial carcinogenesis.

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Small GTPase Ras homologue enriched in brain (RHEB) binds and activates the key metabolic regulator mTORC1, which has an important role in cancer cells, but the role of RHEB in cancer pathogenesis has not been shown. By performing a meta-analysis of published cancer cytogenetic and transcriptome

Mechanisms of amino acid release from the isolated anoxic/reperfused rat heart.

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Loss of amino acids into the coronary artery perfusate, which is exacerbated during anoxic stress, may have important implications for the ability of hearts subjected to ischemia or anoxia to recover function during reoxygenation. This work investigates the mechanisms underlying the amino acid

Anion exchanger and chloride channel in cat carotid body chemotransduction.

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In order to test the hypothesis that carotid body (CB) chemoreception depends on the functions of anion channels and HCO3-/Cl- exchangers, we studied the effects of the anion channel blocker anthracene-9-carboxylic acid (9-ANC), the carbonic anhydrase inhibitor methazolamide, and the HCO3-/Cl-

The preventive effect of salvianolic acid B on malignant transformation of DMBA-induced oral premalignant lesion in hamsters.

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Salvia miltiorrhiza (SM) has been used clinically in Asian countries to improve the microcirculation in the human body. Salvianolic acid B (Sal B), a pure compound extracted from SM, has been reported to be effective against fibrosis and ischemia-reperfusion injury, possibly through its anti-lipid

Quantitative Proteomic Profiling Reveals That Diverse Metabolic Pathways Are Influenced by Melatonin in an in Vivo Model of Ovarian Carcinoma.

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To obtain more information into the molecular mechanisms underlying ovarian cancer (OC), we proposed a comparative proteomic analysis in animals receiving long-term melatonin as therapy or only vehicle using multidimensional protein identification combined with mass spectrometry. To induce tumor, a

AQ4N: an alkylaminoanthraquinone N-oxide showing bioreductive potential and positive interaction with radiation in vivo.

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AQ4N (1,4-bis([2-(dimethylamino-N-oxide)ethyl]amino)5,8-dihydroxy- anthracene-9,10-dione) is a novel alkylaminoanthraquinone N-oxide which, on reduction, forms a stable DNA affinic cytotoxic compound AQ4. The in vivo anti-tumour efficacy of AQ4N was investigated in B6D2F1 mice bearing the T50/80

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