ubiquinone/karcinóm prsníka

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NADH: ubiquinone oxidoreductase inhibitors block induction of ornithine decarboxylase activity in MCF-7 human breast cancer cells.

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Rotenone is the classical inhibitor of NADH: ubiquinone oxidoreductase and its analogue deguelin is a potent inhibitor of 12-O-tetradecanoylphorbol 13-acetate (TPA)-induced ornithine decarboxylase mRNA steady state level and enzyme activity in mouse 308 cells (Gerhäuser et al. 1995). In MCF-7 human

Preliminary evidences on mitochondrial injury and impaired oxidative metabolism in breast cancer.

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Mitochondriopathy is emerging as a new cancer theory; however, the relevance of mitochondrial pathobiology in breast cancer has not yet been completely explored. Herein we report on altered expression levels of the oxidative phosphorylation system (OXPHOS) subunits, mitochondrial structural injury

Mitochondrial NADH dehydrogenase polymorphisms are associated with breast cancer in Poland.

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Complex I NADH-oxidoreductase-ubiquinone transports reducing equivalents from the reduced form of NADH to ubiquinone (coenzyme Q-CoQ). The purpose of this study was to analyze mutations in MT-ND1, MT-ND2, MT-ND3 and MT-ND6 genes and their effect on the biochemical properties, structure and

Plasma coenzyme Q10 concentrations in breast cancer: prognosis and therapeutic consequences.

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BACKGROUND Coenzyme Q10 or ubiquinone is a redox component of the respiratory chain, which may be involved in the pathogenesis of cancer. METHODS In order to better understand the role of this vitamin in the pathogenesis of breast cancer, a clinical trial including 200 women hospitalized for the

Atg7- and Keap1-dependent autophagy protects breast cancer cell lines against mitoquinone-induced oxidative stress.

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The interplay between oxidative stress and autophagy is critical for determining the fate of cancer cells exposed to redox-active and cytotoxic chemotherapeutic agents. Mitoquinone (MitoQ), a mitochondrially-targeted redox-active ubiquinone conjugate, selectively kills breast cancer cells over

Molecular-targeted antitumor agents. 19. Furospongolide from a marine Lendenfeldia sp. sponge inhibits hypoxia-inducible factor-1 activation in breast tumor cells.

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A natural product chemistry-based approach was employed to discover small-molecule inhibitors of the important tumor-selective molecular target hypoxia-inducible factor-1 (HIF-1). Bioassay-guided isolation of an active lipid extract of a Saipan collection of the marine sponge Lendenfeldia sp.

Association between mitochondrial genetic variation and breast cancer risk: The Multiethnic Cohort.

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The mitochondrial genome encodes for thirty-seven proteins, among them thirteen are essential for the oxidative phosphorylation (OXPHOS) system. Inherited variation in mitochondrial genes may influence cancer development through changes in mitochondrial proteins, altering the OXPHOS

Alteration of expression levels of the oxidative phosphorylation system (OXPHOS) in breast cancer cell mitochondria.

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Mitochondria are dynamic intracellular organelles playing a central role in cell metabolism by generating ATP, through the oxidative phosphorylation system (OXPHOS). Altered mitochondrial functions have been identified as causative or contributing factors in some degenerative diseases and are

Kalkitoxin inhibits angiogenesis, disrupts cellular hypoxic signaling, and blocks mitochondrial electron transport in tumor cells.

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The biologically active lipopeptide kalkitoxin was previously isolated from the marine cyanobacterium Moorea producens (Lyngbya majuscula). Kalkitoxin exhibited N-methyl-D-aspartate (NMDA)-mediated neurotoxicity and acted as an inhibitory ligand for voltage-sensitive sodium channels in cultured rat

Lipophilic 2,5-disubstituted pyrroles from the marine sponge Mycale sp. inhibit mitochondrial respiration and HIF-1 activation.

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The lipid extract of the marine sponge Mycale sp. inhibited the activation of hypoxia-inducible factor-1 (HIF-1) in a human breast tumor T47D cell-based reporter assay. Bioassay-guided isolation and structure elucidation yielded 18 new lipophilic 2,5-disubstituted pyrroles and eight structurally

Repurposing atovaquone: targeting mitochondrial complex III and OXPHOS to eradicate cancer stem cells.

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Atovaquone is an FDA-approved anti-malarial drug, which first became clinically available in the year 2000. Currently, its main usage is for the treatment of pneumocystis pneumonia (PCP) and/or toxoplasmosis in immune-compromised patients. Atovaquone is a hydroxy-1,4-naphthoquinone analogue of

The antioxidant transcription factor Nrf2 negatively regulates autophagy and growth arrest induced by the anticancer redox agent mitoquinone.

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Mitoquinone (MitoQ) is a synthetically modified, redox-active ubiquinone compound that accumulates predominantly in mitochondria. We found that MitoQ is 30-fold more cytotoxic to breast cancer cells than to healthy mammary cells. MitoQ treatment led to irreversible inhibition of clonogenic growth of

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