Abstract
Tumorigenesis results from events that impinge on a variety of collaborating metabolic pathways. To assess their role in this process, we utilized a cell-based assay to perform a high-throughput, chemical library screen. In so doing, we identified F16, a small molecule that selectively inhibits proliferation of mammary epithelial, neu-overexpressing cells, as well as a variety of mouse mammary tumor and human breast cancer cell lines. F16 belongs to a group of structurally similar molecules with a delocalized positive charge. The compound is accumulated in mitochondria of responsive cells, driven by the membrane potential, and it compromises their functional integrity. Mitochondrial hyperpolarization is a shared feature of many tumor cell lines, explaining the broad action spectrum of this novel delocalized lipophilic cation.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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Apoptosis / drug effects
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Breast Neoplasms / genetics
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Breast Neoplasms / metabolism*
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Breast Neoplasms / pathology
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Cations / pharmacology
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Cations / toxicity
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Cell Cycle / drug effects
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Cell Division / drug effects
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Cell Line, Transformed
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Epithelial Cells / drug effects
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Epithelial Cells / metabolism*
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Epithelial Cells / pathology
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Genes, erbB-2 / genetics*
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Growth Inhibitors / chemistry
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Growth Inhibitors / pharmacology*
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Growth Inhibitors / toxicity
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Humans
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Indoles / metabolism*
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Indoles / pharmacology
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Mammary Neoplasms, Animal / genetics
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Mammary Neoplasms, Animal / metabolism*
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Mammary Neoplasms, Animal / pathology
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Mammary Neoplasms, Experimental / metabolism*
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Membrane Potentials
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Mice
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Mice, Inbred BALB C
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Mice, Transgenic
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Mitochondria / metabolism*
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Mitochondria / ultrastructure
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Pyridinium Compounds / metabolism*
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Pyridinium Compounds / pharmacology
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Receptor, ErbB-2 / metabolism
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Signal Transduction / drug effects
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Tumor Cells, Cultured
Substances
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Cations
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Growth Inhibitors
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Indoles
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Pyridinium Compounds
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4-(2-(indol-3-yl)vinyl)-1-methylpyridinium
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Receptor, ErbB-2