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• W2888871749 abstract "Abstract The targeting of telomerase and telomere maintenance mechanisms represents a promising therapeutic approach for various types of cancer. In this work, we designed a new protocol to screen for and rank the efficacy of compounds specifically targeting telomeres and telomerase. This approach used two isogenic cell lines containing a circular human artificial chromosome (HAC, lacking telomeres) and a linear HAC (containing telomeres) marked with the EGFP transgene; compounds that target telomerase or telomeres should preferentially induce loss of the linear HAC but not the circular HAC. Our assay allowed quantification of chromosome loss by routine flow cytometry. We applied this dual-HAC assay to rank a set of known and newly developed compounds, including G-quadruplex (G4) ligands. Among the latter group, two compounds, Cu-ttpy and Pt-ttpy, induced a high rate of linear HAC loss with no significant effect on the mitotic stability of a circular HAC. Analysis of the mitotic phenotypes induced by these drugs revealed an elevated rate of chromatin bridges in late mitosis and cytokinesis as well as UFB (ultrafine bridges). Chromosome loss after Pt-ttpy or Cu-ttpy treatment correlated with the induction of telomere-associated DNA damage. Overall, this platform enables identification and ranking of compounds that greatly increase chromosome mis-segregation rates as a result of telomere dysfunction and may expedite the development of new therapeutic strategies for cancer treatment. Significance: An assay provides a unique opportunity to screen thousands of chemical compounds for their ability to inactivate replication of telomeric ends in cancer cells and holds potential to lay the foundation for the discovery of new treatments for cancer. Cancer Res; 78(21); 6282–96. ©2018 AACR." @default.
• W2888871749 created "2018-09-07" @default.
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• W2888871749 date "2018-11-01" @default.
• W2888871749 modified "2023-10-10" @default.
• W2888871749 title "Systematic Analysis of Compounds Specifically Targeting Telomeres and Telomerase for Clinical Implications in Cancer Therapy" @default.
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• W2888871749 doi "https://doi.org/10.1158/0008-5472.can-18-0894" @default.
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