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Published in: Journal of Cancer Research and Clinical Oncology 1/2006

01-01-2006 | Original Paper

Insulin-like growth factor-1 receptor (IGF-1R) expression does not predict for resistance to trastuzumab-based treatment in patients with Her-2/neu overexpressing metastatic breast cancer

Authors: Wolfgang J. Köstler, Gernot Hudelist, Werner Rabitsch, Klaus Czerwenka, Ruth Müller, Christian F. Singer, Christoph C. Zielinski

Published in: Journal of Cancer Research and Clinical Oncology | Issue 1/2006

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Abstract

Purpose: Her-2/neu and the insulin-like growth factor-1 receptor (IGF-1R) share common postreceptor-signaling pathways, and pre-clinical models have implicated IGF-1R-signaling in resistance to treatment with the anti-Her-2/neu antibody trastuzumab. The present analysis was performed to evaluate the clinical relevance of IGF-1R expression within the context of trastuzumab-based therapy. Patients and methods: We performed immunohistochemical (IHC) analysis for IGF-1R expression in tumor specimens from 72 patients receiving trastuzumab-based treatment for Her-2/neu-overexpressing metastatic breast cancer at a single institution. IGF-1R status was evaluated using different cut-offs for positivity regarding staining intensity and staining pattern. IGF-1R positivity was then correlated with clinical patient and biological tumor characteristics and the clinical course of disease of patients under trastuzumab-based therapy. Results: No pattern or intensity of staining for IGF-1R correlated with any of the clinical or biological characteristics. Likewise, response, clinical benefit, progression-free and overall survival were independent of IGF-1R expression in both, univariate and multivariate analyses (all P>0.05). Conclusions: We conclude that IGF-1R expression is not a major predictor of the clinical efficacy of trastuzumab-based treatment in patients with Her-2/neu- overexpressing metastatic breast cancer.
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Metadata
Title
Insulin-like growth factor-1 receptor (IGF-1R) expression does not predict for resistance to trastuzumab-based treatment in patients with Her-2/neu overexpressing metastatic breast cancer
Authors
Wolfgang J. Köstler
Gernot Hudelist
Werner Rabitsch
Klaus Czerwenka
Ruth Müller
Christian F. Singer
Christoph C. Zielinski
Publication date
01-01-2006
Publisher
Springer-Verlag
Published in
Journal of Cancer Research and Clinical Oncology / Issue 1/2006
Print ISSN: 0171-5216
Electronic ISSN: 1432-1335
DOI
https://doi.org/10.1007/s00432-005-0038-8

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Highlights from the ACC 2024 Congress

Year in Review: Pediatric cardiology

Watch Dr. Anne Marie Valente present the last year's highlights in pediatric and congenital heart disease in the official ACC.24 Year in Review session.

Year in Review: Pulmonary vascular disease

The last year's highlights in pulmonary vascular disease are presented by Dr. Jane Leopold in this official video from ACC.24.

Year in Review: Valvular heart disease

Watch Prof. William Zoghbi present the last year's highlights in valvular heart disease from the official ACC.24 Year in Review session.

Year in Review: Heart failure and cardiomyopathies

Watch this official video from ACC.24. Dr. Biykem Bozkurt discusses last year's major advances in heart failure and cardiomyopathies.