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- W2105075315 abstract "Elevated 4N (G(2)-tetraploid) cell populations are unstable intermediates in the development of many human cancers. However, 4N cell populations are intermixed with larger diploid fractions in vivo, limiting investigation of these key intermediates of neoplastic progression. Therefore, to study elevated 4N cell populations in human neoplasia, we used flow cytometry to purify populations of spontaneously arising TP53(wt) and TP53(mut) 4N cells from cell strains derived from premalignant Barrett's esophagus biopsies. Using oligonucleotide arrays, we identified 625 genes differentially expressed in at least one replicate 2N/4N comparison in each strain and in hTERT-immortalized cultures of the TP53(mut) strains. Strikingly, when hierarchically clustered, these data contained a large node of 124 genes that were up-regulated in 4N TP53(mut) cells in the absence of condensed chromosomes. Most of these genes function in G(2)-M to mediate processes such as chromosome condensation and segregation. These results describe the molecular phenotype of dysregulated G(2)-M functions and cell cycle checkpoints in a key intermediate of human neoplastic progression." @default.
- W2105075315 created "2016-06-24" @default.
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- W2105075315 date "2003-07-15" @default.
- W2105075315 modified "2023-10-02" @default.
- W2105075315 title "Molecular phenotype of spontaneously arising 4N (G2-tetraploid) intermediates of neoplastic progression in Barrett's esophagus." @default.
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