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Clinical impact of a novel microRNA chemo-sensitivity predictor in gastrooesophageal cancer

  • Mette Winther
  • , Steen Knudsen
  • , Jesper Ovesen Dahlgaard
  • , Thomas Jensen
  • , Anker Hansen
  • , Peter Buhl Jensen
  • , Trine Tramm
  • , Jan Alsner
  • , Marianne Nordsmark
  • Aarhus Univeristy Hospital
  • Medical Prognosis Institute

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Background
miRNAs might be potentially useful biomarkers for prediction of response to chemotherapeutic
agents, radiotherapy and survival. The aim of this retrospective study was to validate
miRNA response predictors in a cohort of patients with gastrooesophageal cancer in order
to predict overall survival (OS) and disease-specific survival (DSS).
Material and Methods
The study population encompassed 53 patients treated with curative intend for locoregional
gastrooesophageal cancer. miRNA expression was quantified from pre-therapeutic
and diagnostic, formalin-fixed, paraffin embedded tumour specimens using Affymetrix GeneChip
miRNA 1.0 Array. Based on growth inhibition of the NCI60 panel in the presence of
cisplatin, epirubicine and capecitabine, a miRNA based response predictor was developed.
The Cox proportional hazards model was applied to assess the correlations of the response
predictor with OS and DSS.
Results
A univariate analysis demonstrated a statistical significant improvement of OS for patients
who had undergone surgical resection with prediction scores above the median prediction
score (HR: 0.41 (95% CI: 0.17–0.96). Adjusting for surgery and stage, this predictor was
identified to be independently associated with both OS (HR: 0.37 (95% CI: 0.16–0.87)) and
DSS (HR: 0.32 (0.12–0.87)).
Conclusion
The miRNA profile predictive for sensitivity to cisplatin, epirubicine and capecitabine was
shown to be independently associated with OS and DSS in patients with gastrooesophageal
cancer.
Original languageEnglish
Article number2
JournalP L o S One
Volume11
Issue number2
Number of pages8
ISSN1932-6203
DOIs
Publication statusPublished - 17 Feb 2016

Keywords

  • cancer

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