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- W2022893313 abstract "A phosphorothioate oligonucleotide (PS-ODN) with sequence identical to the repeat sequence of the mammalian telomere, 5′-d(TTAGGG)-3′, was incubated with a Burkitt's lymphoma-derived (OMA-BL1) cell line. This hexanucleotide inhibits telomerase activity in cell lysates, lengthens cell doubling time, and induces apoptosis. Concatenated repeats (12-, 18-, and 24-mers) of the 5′-d(TTAGGG)-3′ motif induce similar cellular responses. Scrambled sequences do not efficiently inhibit telomerase activity or significantly alter cell growth and viability. Thein vivoefficacy of this PS-ODN was evaluated in a xenograft human–nude mouse model. Once tumors were established these animals were administered the telomere mimic, 5′-d(TTAGGG)-3′, a control scrambled sequence 5′-d(TGTGAG)-3′, or saline for 14 days via a subcutaneous osmotic pumps in a blinded study monitoring tumor size with dose and time. A significant decrease in tumor size was observed in animals given 50 μg/mouse/day 5′-d(TTAGGG)-3′, but not following 5′-d(TGTGAG)-3′, relative to the saline-treated animals. The antitumor activity of the 6-mer telomere mimic demonstrated a dose dependency including a reduction in metastatic nodules in the spleen. No activity was observed with the scrambled controls. In addition to antitumor activity we observed an increase in the mouse hematopoietic progenitor cell populations, BFU-e and CFU-GM. These results demonstrated the effects of a short hexameric oligonucleotide telomere mimicin vitroandin vivoand the potential utility of short oligonucleotides as telomerase inhibitors." @default.
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- W2022893313 date "1997-05-01" @default.
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- W2022893313 title "A Hexameric Phosphorothioate Oligonucleotide Telomerase Inhibitor Arrests Growth of Burkitt's Lymphoma Cellsin Vitroandin Vivo" @default.
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- W2022893313 doi "https://doi.org/10.1006/taap.1997.8103" @default.
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