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- W3201380303 abstract "DHFR gene amplification is commonly present in methotrexate (MTX)-resistant colon cancer cells and acute lymphoblastic leukemia. In this study, we proposed an integrative framework to characterize the amplified region by using a combination of single-molecule real-time sequencing, next-generation optical mapping, and chromosome conformation capture (Hi-C). We identified an amplification unit spanning 11 genes, from the DHFR gene to the ATP6AP1L gene position, with high adjusted interaction frequencies on chromosome 5 (~2.2 Mbp) and a twenty-fold tandemly amplified region, and novel inversions at the start and end positions of the amplified region as well as frameshift insertions in most of the MSH and MLH genes were detected. These mutations might stimulate chromosomal breakage and cause the dysregulation of mismatch repair. Characterizing the tandem gene-amplified unit may be critical for identifying the mechanisms that trigger genomic rearrangements. These findings may provide new insight into the mechanisms underlying the amplification process and the evolution of drug resistance." @default.
- W3201380303 created "2021-09-27" @default.
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- W3201380303 date "2021-09-01" @default.
- W3201380303 modified "2023-10-11" @default.
- W3201380303 title "Genomic and transcriptomic analyses reveal a tandem amplification unit of 11 genes and mutations in mismatch repair genes in methotrexate-resistant HT-29 cells" @default.
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- W3201380303 doi "https://doi.org/10.1038/s12276-021-00668-x" @default.
- W3201380303 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8492700" @default.
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