C942540d-1b1e-4de8-b6e7-37a8eb0058af - samples
Ontology highlight
ABSTRACT:
PROVIDER: EGAD00001004486 | EGA |
REPOSITORIES: EGA
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Project description:This dataset contains all available targeted exon sequencing bam files from our study, "Activating AKT1 and PIK3CA mutations in metastatic castration-resistant prostate cancer". Patient identifiers are denoted by the first segment of the sample aliases (e.g. "P1"), and additional information is appended to reflect which serial sample is referenced (1st, 2nd, 3rd, etc.), and whether the sample represents cell-free DNA ("cfdna") or paired white-blood cell control ("WBC"). All samples were sequenced using Illumina technology.
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Project description:This dataset contains all available targeted and exome sequencing paired fastq files from our study, "Identification of hypermutation and defective mismatch repair in ctDNA from metastatic prostate cancer". Patient identifiers are denoted by the first three characters of the sample aliases (e.g. "P01"), and additional information is appended to reflect the panel used (targeted 73 gene panel: "PC", or whole-exome panel: "WXS"), and whether the sample represents cell-free DNA ("cfdna") or paired white-blood cell control ("wbc"). Several patients have multiple serial collections available, and these are denoted by the characters "C1, C2, C3," etc. All samples were sequenced using Illumina technology.
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Project description:Dataset contains targeted sequencing data of 712 plasma cell free DNA samples and 428 white blood cell samples collected from 428 men with metastatic prostate cancer. Target capture was performed using a hydridization-based custom Roche SeqCap EZ Choice kit, designed to capture all exons of 72 prostate cancer driver genes. Cell free DNA was extracted from 10 mL blood samples. Libraries were sequenced using Illumina HiSeq 2500 or Illumina MiSeq instruments to a median coverage of 750x. 62% of samples had ctDNA fraction above 2% of total cfDNA.
Note that "Dataset type" is erroneously listed as "Amplicon sequencing", because "Captured-based targeted sequencing" or "Hybridization-based targeted sequencing" were not available options in EGA at the time of submission.
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Project description:Cyclin-dependent kinase 9 (CDK9) stimulates oncogenic transcriptional pathways in cancer. Here, we evaluate the activity of an orally bioavailable CDK9 inhibitor, CDKI-73, in prostate cancer, a disease characterized by aberrant activity of multiple transcriptional regulators. CDKI-73 caused inhibition of proliferation and cell death in diverse in vitro models of androgen receptor (AR)-driven and AR-independent models of castration-resistant prostate cancer (CRPC). The activity of CDKI-73 was validated in more clinically-relevant systems, including xenografts, patient-derived tumor explants and aggressive patient-derived CRPC organoids. Mechanistically, CDKI-73 inhibited CDK9-mediated phosphorylation of serine 2 on RNA polymerase II and serine 81 on AR. This resulted in reduced levels of anti-apoptotic factors and suppression of signaling pathways regulated by AR, MYC and BRD4, key drivers of dysregulated transcription in prostate cancer. CDKI-73 synergized with the BRD4 inhibitor AZD5153 in cell lines and organoid models of aggressive AR-driven and AR-independent disease. Collectively, our work provides new insights into CDK9’s oncogenic activity and reveals CDKI-73 as a promising therapeutic agent for prostate cancer, particularly aggressive, therapy-resistant subtypes.
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