alexa Novel pathways associated with quinone-induced stress in breast cancer cells.
Oncology

Oncology

Journal of Cancer Science & Therapy

Author(s): Benz CC, Atsriku C, Yau C, Britton D, Schilling B,

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Abstract Hormone-dependent breast cancers that overexpress the ligand-binding nuclear transcription factor, estrogen receptor (ER), represent the most common form of breast epithelial malignancy. Exposure of breast epithelial cells to a redox-cycling and arylating quinone induces mitogen-activated protein kinase phosphorylation of the cytoskeletal filament protein, cytokeratin-8, along with thiol arylation of H3 nuclear histones. Exogenous or endogenous quinones can also induce ligand-independent nuclear translocation and phosphorylation of ER; with excess exposure, these quinones can arylate ER zinc fingers, impairing ER DNA-binding and altering ER-inducible gene expression. Immunoaffinity enrichment for low abundance proteins such as ER, coupled with modern mass spectrometry techniques, promises to improve understanding of the protein-modifications produced by endogenous and exogenous quinone exposure and their role in the development or progression of epithelial malignancies such as breast cancer. This article was published in Drug Metab Rev and referenced in Journal of Cancer Science & Therapy

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