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Erschienen in: World Journal of Surgery 11/2012

01.11.2012

Prognostic MicroRNAs in Cancer Tissue from Patients Operated for Pancreatic Cancer—Five MicroRNAs in a Prognostic Index

verfasst von: Nicolai A. Schultz, Klaus K. Andersen, Anne Roslind, Hanni Willenbrock, Morten Wøjdemann, Julia S. Johansen

Erschienen in: World Journal of Surgery | Ausgabe 11/2012

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Abstract

Background

The aim of the present study was to identify a panel of microRNAs (miRNAs) that can predict overall survival (OS) in non micro-dissected cancer tissues from patients operated for pancreatic cancer (PC).

Methods

MiRNAs were purified from formalin-fixed paraffin embedded (FFPE) cancer tissue from 225 patients operated for PC. Only a few of those patients received adjuvant chemotherapy. Expressions of miRNAs were determined with the TaqMan MicroRNA Array v2.0. Two statistical methods, univariate selection and the Lasso (Least Absolute Shrinkage and Selection Operator) method, were applied in conjunction with the Cox proportional hazard model to relate miRNAs to OS.

Results

High expression of miR-212 and miR-675 and low expression of miR-148a*, miR-187, and let-7g* predicted short OS independent of age, gender, calendar year of operation, KRAS mutation status, tumor stage, American Society of Anesthesiologists (ASA) score, localization (not miR-148a*), and differentiation of tumor. A prognostic index (PI) based on these five miRNAs was calculated for each patient. The median survival was 1.09 years (Confidence Interval [CI] 0.98–1.43) for PI > median PI compared to 2.23 years (CI 1.84–4.36) for PI < median. MiR-212, miR-675, miR-187, miR-205, miR-944, miR-431, miR-194*, miR-148a*, and miR-769-5p showed the strongest prediction ability by the Lasso method. Thus miR-212, miR-675, miR-187, and miR-148a* were predictors for OS in both statistical methods.

Conclusions

The combination of five miRNAs expression in non micro-dissected FFPE PC tissue can identify patients with short OS after radical surgery. The results are independent of chemotherapy treatment. Patients with a prognostic index > median had a very short median OS of only 1 year.
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Metadaten
Titel
Prognostic MicroRNAs in Cancer Tissue from Patients Operated for Pancreatic Cancer—Five MicroRNAs in a Prognostic Index
verfasst von
Nicolai A. Schultz
Klaus K. Andersen
Anne Roslind
Hanni Willenbrock
Morten Wøjdemann
Julia S. Johansen
Publikationsdatum
01.11.2012
Verlag
Springer-Verlag
Erschienen in
World Journal of Surgery / Ausgabe 11/2012
Print ISSN: 0364-2313
Elektronische ISSN: 1432-2323
DOI
https://doi.org/10.1007/s00268-012-1705-y

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