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Erschienen in: Journal of Cancer Research and Clinical Oncology 3/2015

01.03.2015 | Original Article – Clinical Oncology

Serum peptide signatures for pancreatic cancer based on mass spectrometry: a comparison to CA19-9 levels and routine imaging techniques

verfasst von: Berit Velstra, Marieke A. Vonk, Bert A. Bonsing, Bart J. Mertens, Simone Nicolardi, Anouck Huijbers, Hans Vasen, André M. Deelder, Wilma E. Mesker, Yuri E. M. van der Burgt, Rob A. E. M. Tollenaar

Erschienen in: Journal of Cancer Research and Clinical Oncology | Ausgabe 3/2015

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Abstract

Purpose

The detection of pancreatic tumors lacks a sensitive and specific diagnostic tool. Mass spectrometry (MS)-based profiling of serum proteins is a promising approach for discovery of new clinical biomarkers or biomarker signatures.

Methods

Serum samples from pancreatic cancer (PC) patients and control individuals were collected and processed using a standardized protocol. Samples were divided in a calibration set (n = 49 PC and 110 controls) and a validation set (n = 39 PC and 75 controls). Peptide profiles were obtained using a combination of automated solid-phase extraction with reversed-phase C18 paramagnetic beads and matrix-assisted laser desorption ionization time-of-flight MS.

Results

Linear discriminant analysis with double cross-validation resulted in a discriminating peptide signature for PC in the calibration set with a sensitivity of 78 % and a specificity of 91 % [area under the curve (AUC) of 92 %]. Classification was validated with a sensitivity of 93 % and a specificity of 100 % (AUC of 98 %), and the results were compared with carbohydrate antigen 19-9 levels and currently available clinical imaging techniques. The ten most discriminating peptide peaks were identified as fragments of proteins involved in the clotting cascade, acute phase response and immunologic response.

Conclusions

In this study, it is shown that MS-based serum peptide profiles can discriminate between PC and control samples. The approach has great potential for high-throughput analysis in surveillance programs and appears to be most promising for patients with an inherited risk for PC, who benefit from more frequent screening.
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Metadaten
Titel
Serum peptide signatures for pancreatic cancer based on mass spectrometry: a comparison to CA19-9 levels and routine imaging techniques
verfasst von
Berit Velstra
Marieke A. Vonk
Bert A. Bonsing
Bart J. Mertens
Simone Nicolardi
Anouck Huijbers
Hans Vasen
André M. Deelder
Wilma E. Mesker
Yuri E. M. van der Burgt
Rob A. E. M. Tollenaar
Publikationsdatum
01.03.2015
Verlag
Springer Berlin Heidelberg
Erschienen in
Journal of Cancer Research and Clinical Oncology / Ausgabe 3/2015
Print ISSN: 0171-5216
Elektronische ISSN: 1432-1335
DOI
https://doi.org/10.1007/s00432-014-1812-2

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