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01.03.2013 | Original article

Cyclin D1, EGFR, and Akt/mTOR pathway

Potential prognostic markers in localized laryngeal squamous cell carcinoma

verfasst von: D. Dionysopoulos, K. Pavlakis, V. Kotoula, E. Fountzilas, K. Markou, I. Karasmanis, N. Angouridakis, A. Nikolaou, K.T. Kalogeras, G. Fountzilas

Erschienen in: Strahlentherapie und Onkologie | Ausgabe 3/2013

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Abstract

Introduction

EGFR (epidermal growth factor receptor), cyclin D1 and Akt/mTOR pathways are active in head and neck cancer. The aim of this study was to explore biomarker expression, their correlations with clinicopathological parameters and their prognostic utility in a cohort of patients with localized squamous laryngeal carcinoma.

Patients and methods

We assessed relative messenger RNA expression of EGFR, Akt1, 2, and 3, mTOR and CCND1, copy number variants of the EGFR and CCND1 genes and immunohistochemical protein expression of EGFR, p-Akt308, p-Akt473, pmTOR, PTEN, p53 and cyclin D1 in paraffin-embedded tissue samples of localized laryngeal carcinomas.

Results

In 289 patients with T3–4 (77.8%), node-negative (84.1%) tumors of the larynx, high EGFR and CCND1 mRNA correlated with no or ex-smoking, (p = 0.003 and p = 0.029, respectively), while low Akt3 mRNA correlated with alcohol abuse, N0 stage, total laryngectomy, and absence of neck dissection. At a median follow-up of 74.5 months, high mTOR mRNA expression was marginally associated with shorter disease-free survival (hazard ratio [HR] = 1.54; p = 0.093) and high Akt3 mRNA with shorter overall survival (HR = 1.49; p = 0.0786), in univariate analysis. In multivariate analysis, node-positive status, subglottic–transglottic location, surgery other than total laryngectomy and mTOR/CCND1 mRNA interaction with a hazard ratio of 2.16 (p value for interaction: 0.0010) were independent predictors of relapse, while node-positive status and subglottic–transglottic location were associated with higher risk for death.

Conclusion

In localized laryngeal cancer, clinicopathological parameters and an interaction of high mTOR and CCND1 mRNA expression were found to be associated with poor patient outcome.

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Titel: Cyclin D1, EGFR, and Akt/mTOR pathway
Potential prognostic markers in localized laryngeal squamous cell carcinoma
verfasst von: D. Dionysopoulos
K. Pavlakis
V. Kotoula
E. Fountzilas
K. Markou
I. Karasmanis
N. Angouridakis
A. Nikolaou
K.T. Kalogeras
G. Fountzilas
Publikationsdatum: 01.03.2013
Verlag: Springer-Verlag
Erschienen in: Strahlentherapie und Onkologie / Ausgabe 3/2013
Print ISSN: 0179-7158
Elektronische ISSN: 1439-099X
DOI: https://doi.org/10.1007/s00066-012-0275-0

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Cyclin D1, EGFR, and Akt/mTOR pathway

Potential prognostic markers in localized laryngeal squamous cell carcinoma