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High levels of genomic aberrations in serous ovarian cancers are associated with better survival. | LitMetric

AI Article Synopsis

  • - Recent research indicates that high levels of genomic instability, often linked to poor cancer prognosis, may actually benefit survival in certain tumor types, particularly high-grade serous ovarian cancers (SOC).
  • - A study involving 144 SOC patients from Norway and Australia measured genomic instability using the Total Aberration Index (TAI) and found that patients with above-median TAI had significantly better overall and progression-free survival rates.
  • - The findings suggest that increased genomic instability might enhance patients' responses to chemotherapy, as the study's results were corroborated by robust statistical analyses.

Article Abstract

Genomic instability and copy number alterations in cancer are generally associated with poor prognosis; however, recent studies have suggested that extreme levels of genomic aberrations may be beneficial for the survival outcome for patients with specific tumour types. We investigated the extent of genomic instability in predominantly high-grade serous ovarian cancers (SOC) using two independent datasets, generated in Norway (n = 74) and Australia (n = 70), respectively. Genomic instability was quantified by the Total Aberration Index (TAI), a measure of the abundance and genomic size of copy number changes in a tumour. In the Norwegian cohort, patients with TAI above the median revealed significantly prolonged overall survival (p<0.001) and progression-free survival (p<0.05). In the Australian cohort, patients with above median TAI showed prolonged overall survival (p<0.05) and moderately, but not significantly, prolonged progression-free survival. Results were confirmed by univariate and multivariate Cox regression analyses with TAI as a continuous variable. Our results provide further evidence supporting an association between high level of genomic instability and prolonged survival of high-grade SOC patients, possibly as disturbed genome integrity may lead to increased sensitivity to chemotherapeutic agents.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3553118PMC
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0054356PLOS

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