Accumulation of copy number alterations and clinical progression across advanced prostate cancer

Study ID Alternative Stable ID Type
EGAS00001006251 Other

Study Description

The burden of copy number alterations positively associated with radiologically-evident distant metastases at diagnosis (P=0.00006) and showed a non-linear relationship with clinical outcome on univariable and multivariable analysis, characterised by a sharp increase in the relative risk of progression (P=0.003) and death (P=0.045) for each unit increase, stabilising into more modest increases with higher burdens. This association between copy number burden and outcome was similar in each of the four metastatic states. Copy number loss occurred significantly more frequently than gain at the lowest copy number burden quartile (q=4.1X10-6). Loss of segments in chromosome 5q21-22 and gains at 8q21-24, respectively including CHD1 and cMYC, occurred more frequently in cases with higher copy number alteration (for either region: Kolmogorov–Smirnov distance, 0.5; adjusted P<0.0001). Copy number alterations showed variability across tumor regions in the same prostate. This variance associated with increased risk of distant metastases (Kruskal-Wallis test P=0.037).

Study Datasets 1 dataset.

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Dataset ID Description Technology Samples
We copy number profiled 688 tumor regions from 300 patients presenting with advanced prostate cancer and prospectively followed-up (median, 7 years) in the control group of the STAMPEDE trial. Patients were categorised into four metastatic states, namely high-risk non-metastatic (with or without local lymph node involvement) or metastatic (low or high volume).
Illumina NovaSeq 6000 603

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