Identification of recurrent chromosome breaks underlying structural rearrangements in mammary cancer cell lines [Break-seq]
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA856873 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR20046533_1.fastq.gz | Fastqsanger.gz | |||
| SRR20046533_2.fastq.gz | Fastqsanger.gz | |||
| SRR20046534_1.fastq.gz | Fastqsanger.gz | |||
| SRR20046534_2.fastq.gz | Fastqsanger.gz | |||
| SRR20046535_1.fastq.gz | Fastqsanger.gz |
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Project description:Cancer genomes are characterized by accumulation of small-scale somatic mutations as well as large-scale chromosomal deletions, amplifications, and complex structural rearrangements. This characteristic is at least partially dependent on the ability of cancer cells to undergo recurrent chromosome breakage. In order to address to what extent chromosomal structural rearrangement breakpoints correlate with recurrent DNA double strand breaks (DSBs), we simultaneously mapped chromosome structural variation breakpoints by whole genome DNA-seq and spontaneous DSB formation by Break-seq in the breast cancer cell line MCF-7 and a non-cancer control cell line MCF-10A. We identified concurrent DSBs and structural variation breakpoints almost exclusively in the pericentromeric region of chromosome 16q in MCF-7 cells. We fine-tuned the identification of copy number variation breakpoints on 16q. In addition, we detected recurrent DSBs that occurred in both MCF-7 and MCF-10A. We propose a model for DSB-driven chromosome rearrangements that led to the translocation of 16q, likely with 10q, and the eventual 16q loss that does not involve the pericentromere of 16q. We present evidence from RNA-seq data that select genes, including SHCBP1, ORC6 and MYLK3, which are immediately downstream from the 16q pericentromere show heightened expression in MCF-7 cell line compared to the control. Data published by The Cancer Genome Atlas showed that all three genes have increased expression in breast tumor samples. We suggest that these genes are potential oncogenes for breast cancer progression. The search for tumor suppressor loss that accompanies the 16q loss ought to be augmented by the identification of potential oncogenes that gained expression during chromosomal rearrangements.
2022-07-12 | GSE207714 | GEO
Project description:Cancer genomes are characterized by accumulation of small-scale somatic mutations as well as large-scale chromosomal deletions, amplifications, and complex structural rearrangements. This characteristic is at least partially dependent on the ability of cancer cells to undergo recurrent chromosome breakage. In order to address to what extent chromosomal structural rearrangement breakpoints correlate with recurrent DNA double strand breaks (DSBs), we simultaneously mapped chromosome structural variation breakpoints by whole genome DNA-seq and spontaneous DSB formation by Break-seq in the breast cancer cell line MCF-7 and a non-cancer control cell line MCF-10A. We identified concurrent DSBs and structural variation breakpoints almost exclusively in the pericentromeric region of chromosome 16q in MCF-7 cells. We fine-tuned the identification of copy number variation breakpoints on 16q. In addition, we detected recurrent DSBs that occurred in both MCF-7 and MCF-10A. We propose a model for DSB-driven chromosome rearrangements that led to the translocation of 16q, likely with 10q, and the eventual 16q loss that does not involve the pericentromere of 16q. We present evidence from RNA-seq data that select genes, including SHCBP1, ORC6 and MYLK3, which are immediately downstream from the 16q pericentromere show heightened expression in MCF-7 cell line compared to the control. Data published by The Cancer Genome Atlas showed that all three genes have increased expression in breast tumor samples. We suggest that these genes are potential oncogenes for breast cancer progression. The search for tumor suppressor loss that accompanies the 16q loss ought to be augmented by the identification of potential oncogenes that gained expression during chromosomal rearrangements.
2022-07-12 | GSE207697 | GEO
Project description:Cancer genomes are characterized by accumulation of small-scale somatic mutations as well as large-scale chromosomal deletions, amplifications, and complex structural rearrangements. This characteristic is at least partially dependent on the ability of cancer cells to undergo recurrent chromosome breakage. In order to address to what extent chromosomal structural rearrangement breakpoints correlate with recurrent DNA double strand breaks (DSBs), we simultaneously mapped chromosome structural variation breakpoints by whole genome DNA-seq and spontaneous DSB formation by Break-seq in the breast cancer cell line MCF-7 and a non-cancer control cell line MCF-10A. We identified concurrent DSBs and structural variation breakpoints almost exclusively in the pericentromeric region of chromosome 16q in MCF-7 cells. We fine-tuned the identification of copy number variation breakpoints on 16q. In addition, we detected recurrent DSBs that occurred in both MCF-7 and MCF-10A. We propose a model for DSB-driven chromosome rearrangements that led to the translocation of 16q, likely with 10q, and the eventual 16q loss that does not involve the pericentromere of 16q. We present evidence from RNA-seq data that select genes, including SHCBP1, ORC6 and MYLK3, which are immediately downstream from the 16q pericentromere show heightened expression in MCF-7 cell line compared to the control. Data published by The Cancer Genome Atlas showed that all three genes have increased expression in breast tumor samples. We suggest that these genes are potential oncogenes for breast cancer progression. The search for tumor suppressor loss that accompanies the 16q loss ought to be augmented by the identification of potential oncogenes that gained expression during chromosomal rearrangements.
2022-07-12 | GSE207696 | GEO
Project description:Identification of recurrent chromosome breaks underlying structural rearrangements in mammary cancer cell lines
| PRJNA856867 | ENA
Project description:Identification of recurrent chromosome breaks underlying structural rearrangements in mammary cancer cell lines [DNA-seq]
| PRJNA856704 | ENA
Project description:Identification of recurrent chromosome breaks underlying structural rearrangements in mammary cancer cell lines [RNA-seq]
| PRJNA856705 | ENA
Project description:Cancer genomes are characterized by the accumulation of small-scale somatic mutations as well as large-scale chromosomal deletions, amplifications, and complex structural rearrangements. This characteristic is at least partially dependent on the ability of cancer cells to undergo recurrent chromosome breakage. In order to address the extent to which chromosomal structural rearrangement breakpoints correlate with recurrent DNA double-strand breaks (DSBs), we simultaneously mapped chromosome structural variation breakpoints (using whole-genome DNA-seq) and spontaneous DSB formation (using Break-seq) in the estrogen receptor (ER)-positive breast cancer cell line MCF-7 and a non-cancer control breast epithelium cell line MCF-10A. We identified concurrent DSBs and structural variation breakpoints almost exclusively in the pericentromeric region of chromosome 16q in MCF-7 cells. We fine-tuned the identification of copy number variation breakpoints on 16q. In addition, we detected recurrent DSBs that occurred in both MCF-7 and MCF-10A. We propose a model for DSB-driven chromosome rearrangements that lead to the translocation of 16q, likely with 10q, and the eventual 16q loss that does not involve the pericentromere of 16q. We present evidence from RNA-seq data that select genes, including SHCBP1, ORC6, and MYLK3, which are immediately downstream from the 16q pericentromere, show heightened expression in MCF-7 cell line compared to the control. Data published by The Cancer Genome Atlas show that all three genes have increased expression in breast tumor samples. We found that SHCBP1 and ORC6 are both strong poor prognosis and treatment outcome markers in the ER-positive breast cancer cohort. We suggest that these genes are potential oncogenes for breast cancer progression. The search for tumor suppressor loss that accompanies the 16q loss ought to be augmented by the identification of potential oncogenes that gained expression during chromosomal rearrangements.
| S-EPMC9319013 | biostudies-literature
Project description:This SuperSeries is composed of the SubSeries listed below.
2022-07-12 | GSE207716 | GEO
Project description:Chromothripsis represents a novel phenomenon in the structural variation landscape of cancer genomes. Here, we analyzed the genomes of ten patients with congenital disease that were preselected to carry complex chromosomal rearrangements (CCRs) with more than two breakpoints. The rearrangements displayed unanticipated complexity resembling chromothripsis. We find that eight of them contain hallmarks of multiple clustered double-stranded DNA breaks (DSBs) on one or more chromosomes. In addition, nucleotide resolution analysis of 98 breakpoint-junctions indicates that break-repair involves non-homologous or microhomology mediated end-joining. We observed that these eight rearrangements are balanced or contain sporadic deletions ranging in size between a few hundred bp and several Mb. The two remaining complex rearrangements did not display signs of DSBs and contain duplications, indicative of rearrangement processes involving template-switching. Our work provides detailed insight in the characteristics of chromothripsis and supports a role for clustered DSBs driving some constitutional chromothripsis rearrangements. We analyzed five patient-parent trios with Illumina BeadChip arrays to test for (de novo) copy number variants and to analyze the parental origin of the complex rearrangements in these patients.
2012-05-10 | E-GEOD-37906 | biostudies-arrayexpress
Project description:Repair of DNA double-strand breaks (DSBs) by non-homologous end-joining is critical for neural development, and brain cells frequently contain somatic genomic variations that might involve DSB intermediates. We now use an unbiased, high-throughput approach to identify genomic regions harboring recurrent DSBs in primary neural stem/progenitor cells (NSPCs). We identify 27 recurrent DSB clusters (RDCs) and, remarkably, all occur within gene bodies. Most of these NSPC RDCs were detected only upon mild, aphidicolin-induced replication stress, providing a nucleotide-resolution view of replication-associated genomic fragile sites. The vast majority of RDCs occur in long, transcribed, and late-replicating genes. Moreover, almost 90% of identified RDC-containing genes are involved in synapse function and/or neural cell adhesion, with a substantial fraction also implicated in tumor suppression and/or mental disorders. Our characterization of NSPC RDCs reveals a basis of gene fragility and suggests potential impacts of DNA breaks on neurodevelopment and neural functions. We performed high-throughput, genome-wide, translocation sequencing (HTGTS) and GRO-seq in primary mouse neural stem/progenitor cells of the indicated genotypes.
2016-02-15 | E-GEOD-74356 | biostudies-arrayexpress