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Published in: BMC Cancer 1/2014

Open Access 01-12-2014 | Research article

pERK, pAKT and p53 as tissue biomarkers in erlotinib-treated patients with advanced pancreatic cancer: a translational subgroup analysis from AIO-PK0104

Authors: Steffen Ormanns, Jens T Siveke, Volker Heinemann, Michael Haas, Bence Sipos, Anna Melissa Schlitter, Irene Esposito, Andreas Jung, Rüdiger P Laubender, Stephan Kruger, Ursula Vehling-Kaiser, Cornelia Winkelmann, Ludwig Fischer von Weikersthal, Michael R Clemens, Thomas C Gauler, Angela Märten, Michael Geissler, Tim F Greten, Thomas Kirchner, Stefan Boeck

Published in: BMC Cancer | Issue 1/2014

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Abstract

Background

The role of pERK, pAKT and p53 as biomarkers in patients with advanced pancreatic cancer has not yet been defined.

Methods

Within the phase III study AIO-PK0104 281 patients with advanced pancreatic cancer received an erlotinib-based 1st-line regimen. Archival tissue from 153 patients was available for central immunohistochemistry staining for pERK, pAKT and p53. Within a subgroup analysis, biomarker data were correlated with efficacy endpoints and skin rash using a Cox regression model.

Results

Fifty-five out of 153 patients were classified as pERKlow and 98 patients as pERKhigh; median overall survival (OS) was 6.2 months and 5.7 months, respectively (HR 1.29, p = 0.16). When analysing pERK as continuous variable, the pERK score was significantly associated with OS (HR 1.06, 95% CI 1.0-1.12, p = 0.05). Twenty-one of 35 patients were pAKTlow and 14/35 pAKThigh with a corresponding median OS of 6.4 months and 6.8 months, respectively (HR 1.03, p = 0.93). Four out of 50 patients had a complete loss of p53 expression, 20 patients a regular expression and 26 patients had tumors with p53 overexpression. The p53 status had no impact on OS (p = 0.91); however, a significant improvement in progression-free survival (PFS) (6.0 vs 1.8 months, HR 0.24, p = 0.02) and a higher rate of skin rash (84% vs 25%, p = 0.02) was observed for patients with a regular p53 expression compared to patients with a complete loss of p53.

Conclusion

pERK expression may have an impact on OS in erlotinib-treated patients with advanced pancreatic cancer; p53 should be further investigated for its potential role as a predictive marker for PFS and skin rash.

Trial registration

NCT00440167 (registration date: February 22, 2007).
Appendix
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Metadata
Title
pERK, pAKT and p53 as tissue biomarkers in erlotinib-treated patients with advanced pancreatic cancer: a translational subgroup analysis from AIO-PK0104
Authors
Steffen Ormanns
Jens T Siveke
Volker Heinemann
Michael Haas
Bence Sipos
Anna Melissa Schlitter
Irene Esposito
Andreas Jung
Rüdiger P Laubender
Stephan Kruger
Ursula Vehling-Kaiser
Cornelia Winkelmann
Ludwig Fischer von Weikersthal
Michael R Clemens
Thomas C Gauler
Angela Märten
Michael Geissler
Tim F Greten
Thomas Kirchner
Stefan Boeck
Publication date
01-12-2014
Publisher
BioMed Central
Published in
BMC Cancer / Issue 1/2014
Electronic ISSN: 1471-2407
DOI
https://doi.org/10.1186/1471-2407-14-624

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