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• W2988660356 endingPage "111891" @default.
• W2988660356 startingPage "111891" @default.
• W2988660356 abstract "In 10-15% of cancers, telomere maintenance is provided by a telomerase-independent mechanism known as alternative lengthening of telomere (ALT), making telomerase inhibitors ineffective on these cancers. Ligands that stabilize telomeric G-quadruplex (G4) are considered to be able to inhibit either the ALT process or disrupt the T-loop structure, which would be promising therapeutic agents for ALT cancers. Notably, the 3'-terminal overhang of telomeric DNA might fold into multimeric G4 containing consecutive G4 subunits, which offers an attractive target for selective ligands considering large numbers of G4s widespread in the genome. In this study, a dimeric aryl-substituted imidazole (DIZ-3) was developed as a selective multimeric G4 ligand based on a G4-ligand-dimerizing strategy. Biophysical experiments revealed that DIZ-3 intercalated into the G4-G4 interface, stabilizing the higher-order structure. Furthermore, this ligand was demonstrated to induce cell cycle arrest and apoptosis, and thus inhibited cell proliferation in an ALT cancer cell line. Cancer cells were more sensitive to DIZ-3, relative to normal cells. Notably, DIZ-3 had little effect on the transcription of several G4-dependent oncogenes. This study provides a nice example for discovering dimeric agents to potentially treat ALT cancers via targeting telomeric multimeric G4." @default.
• W2988660356 created "2019-11-22" @default.
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• W2988660356 date "2020-01-01" @default.
• W2988660356 modified "2023-09-26" @default.
• W2988660356 title "Dimeric aryl-substituted imidazoles may inhibit ALT cancer by targeting the multimeric G-quadruplex in telomere" @default.
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• W2988660356 doi "https://doi.org/10.1016/j.ejmech.2019.111891" @default.
• W2988660356 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31759730" @default.
• W2988660356 hasPublicationYear "2020" @default.
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