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- W2495191531 abstract "There is growing evidence that many solid tumors have defective DNA repair pathways and cell cycle checkpoints. This has spurred development of therapeutics to specifically target cancer cells with defective DNA repair, but few have been successful outright due to problems such as general toxicity. One novel anti-cancer agent of interest to us is 3E10, a unique cell-penetrating, anti-DNA autoantibody. This molecule is non-toxic to normal cells on its own but has deleterious effects on cells with DNA repair deficiencies. Specifically, 3E10 has been shown to be synthetically lethal in BRCA2-deficient human cancer cells, to be synergistic with radiation and other commonly used DNA damaging therapies, and to reduce the efficiency of Rad51 mediated strand exchange and thus homologous recombination (HR). The goal of this project is to better understand how 3E10 can be used as a new paradigm for cancer treatment. New evidence suggests that 3E10 inhibits Exo1 exonuclease activity. Additionally, preliminary data shows that 3E10 physically interacts with Rad51, ultimately inhibiting Rad51 nuclear localization and foci formation. Additionally, a point mutation in 3E10 that confers increased DNA binding mediates increased cell death in BRCA2-deficient human cancer cells. Furthermore, studies investigating the potential therapeutic effect of 3E10 in patient derived primary melanoma cell lines show that 3E10 is synthetically lethal with PTEN deficiency. This data suggests that 3E10 inhibits HR by binding to DNA at double strand breaks and occupying sites normally processed by core repair machinery, as well as by physically interacting with Rad51. Overall, 3E10 holds great promise as a novel therapeutic agent for various cancers, including PTEN deficient melanomas. Reference: Hansen, J. et al. Targeting cancer with a lupus autoantibody. Science Translational Medicine 4, (2012) Citation Format: Audrey L. Turchick, Peter M. Glazer. Targeting DNA repair deficient cancers with the cell-penetrating autoantibody 3E10. [abstract]. In: Proceedings of the 107th Annual Meeting of the American Association for Cancer Research; 2016 Apr 16-20; New Orleans, LA. Philadelphia (PA): AACR; Cancer Res 2016;76(14 Suppl):Abstract nr 2748." @default.
- W2495191531 created "2016-08-23" @default.
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- W2495191531 date "2016-07-15" @default.
- W2495191531 modified "2023-09-27" @default.
- W2495191531 title "Abstract 2748: Targeting DNA repair deficient cancers with the cell-penetrating autoantibody 3E10" @default.
- W2495191531 doi "https://doi.org/10.1158/1538-7445.am2016-2748" @default.
- W2495191531 hasPublicationYear "2016" @default.
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