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• W2024014505 abstract "Hexavalent chromium [Cr(VI)] generated during industrial processes is carcinogenic. Although much is known about the deleterious effects caused by reactive oxygen species generated during the reduction of Cr(VI) after its absorption by biological systems, the precise mechanisms underlying Cr(VI) cytotoxicity remain poorly defined. Here, we analyzed, at the global proteome scale, the perturbation of protein expression in GM00637 human skin fibroblast cells upon exposure to potassium dichromate (K2Cr2O7). We were able to quantify ∼4600 unique proteins, among which ∼400 exhibited significant alterations in expression levels upon a 24-h treatment with 0.5 μM K2Cr2O7. Pathway analysis revealed the Cr(VI)-induced perturbation of cholesterol biosynthesis, G-protein signaling, inflammatory response, and selenoprotein pathways. In particular, we discovered that the K2Cr2O7 treatment led to pronouncedly elevated expression of a large number of enzymes involved in de novo cholesterol biosynthesis. Real-time PCR analysis revealed the increased mRNA expression of selected genes involved in cholesterol biosynthesis. Consistently, K2Cr2O7 treatment resulted in marked increases in cellular cholesterol level in multiple cell lines. Moreover, the Cr(VI)-induced growth inhibition of cultured human cells could be rescued by a cholesterol-lowering drug, lovastatin. Together, we demonstrated, for the first time, that Cr(VI) may exert its cytotoxic effect, at least partly, through the up-regulation of enzymes involved in de novo cholesterol biosynthesis and the resultant increase of cholesterol level in cells." @default.
• W2024014505 created "2016-06-24" @default.
• W2024014505 creator A5013799944 @default.
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• W2024014505 date "2013-06-11" @default.
• W2024014505 modified "2023-10-14" @default.
• W2024014505 title "Hexavalent Chromium-induced Alteration of Proteomic Landscape in Human Skin Fibroblast Cells" @default.
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• W2024014505 doi "https://doi.org/10.1021/pr400375p" @default.
• W2024014505 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3725333" @default.
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