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• W2069364852 startingPage "1710" @default.
• W2069364852 abstract "The proteomic effects of the Hsp90 inhibitor, SNX-7081, have been determined on the p53-mutated B-cell chronic lymphocytic leukemia (CLL) cell line, MEC1. Following SNX-7081 treatment (500 nM, 24 h), 51 proteins changed abundance by more than 2-fold (p < 0.05); 7 proteins increased while 44 proteins decreased. Proteins identified as differentially abundant by LC-MS/MS were validated by Western blotting (DDB1, PCNA, MCM2, Hsp90, Hsp70, GRP78, PDIA6, HLA-DR). RT-PCR showed that SNX-7081 unexpectedly modulates a number of these proteins in MEC1 cells at the mRNA level (PCNA, MCM2, Nup155, Hsp70, GRP78, PDIA6, and HLA-DR). Pathway analysis determined that 3 of the differentially abundant proteins (cyclin D1, c-Myc and pRb) were functionally related. p53 levels did not change upon SNX-7081 treatment of p53 wild-type Raji cells or p53-mutated MEC1 and U266 cells, indicating that SNX-7081 has a p53-independent mechanism. The decreases in DDB1, MCM2, c-Myc, and PCNA and increases of pRb and cyclin D1 were confirmed in MEC1, U266, Raji, and p53 null HL60 cells by Western blotting. These data suggest that SNX-7081 arrests the cell cycle and inhibits DNA replication and r epair and provides evidence for the mechanism of the observed synergy between Hsp90 inhibitors and drugs that induce DNA strand breaks." @default.
• W2069364852 created "2016-06-24" @default.
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• W2069364852 date "2013-03-22" @default.
• W2069364852 modified "2023-09-27" @default.
• W2069364852 title "Hsp90 Inhibitor SNX-7081 Dysregulates Proteins Involved with DNA Repair and Replication and the Cell Cycle in Human Chronic Lymphocytic Leukemia (CLL) Cells" @default.
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• W2069364852 doi "https://doi.org/10.1021/pr301055y" @default.
• W2069364852 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23458665" @default.
• W2069364852 hasPublicationYear "2013" @default.

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