BRCA1 Activates a G2-M Cell Cycle Checkpoint following 6-Thioguanine–Induced DNA Mismatch Damage
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چکیده
منابع مشابه
BRCA1 activates a G2-M cell cycle checkpoint following 6-thioguanine-induced DNA mismatch damage.
Human DNA mismatch repair (MMR) is involved in the response to certain chemotherapy drugs, including 6-thioguanine (6-TG). Consistently, MMR-deficient human tumor cells show resistance to 6-TG damage as manifested by a reduced G(2)-M arrest and decreased apoptosis. In this study, we investigate the role of the BRCA1 protein in modulating a 6-TG-induced MMR damage response, using an isogenic hum...
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Cell cycle checkpoints play a central role in genomic stability. The human DNA topoisomerase II-binding protein 1 (TopBP1) protein contains eight BRCA1 COOH terminus motifs and shares similarities with Cut5, a yeast checkpoint Rad protein. TopBP1 also shares many features with BRCA1. We report that, when expression of TopBP1 protein is inhibited in BRCA1 mutant cells, mimicking a TopBP1, BRCA1 ...
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A role for the Mut L homologue-1 (MLH1) protein, a necessary component of DNA mismatch repair (MMR), in G2-M cell cycle checkpoint arrest after 6-thioguanine (6-TG) exposure was suggested previously. A potential role for MLH1 in G1 arrest and/or G1-S transition after damage was, however, not discounted. We report that MLH1-deficient human colon carcinoma (HCT116) cells showed decreased survival...
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ژورنال
عنوان ژورنال: Cancer Research
سال: 2007
ISSN: 0008-5472,1538-7445
DOI: 10.1158/0008-5472.can-06-2205