RhoB Determines Tumor Aggressiveness in a Murine EGFRL858R-Induced Adenocarcinoma Model and Is a Potential Prognostic Biomarker for Lepidic Lung Cancer - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Clinical Cancer Research Année : 2014

RhoB Determines Tumor Aggressiveness in a Murine EGFRL858R-Induced Adenocarcinoma Model and Is a Potential Prognostic Biomarker for Lepidic Lung Cancer

Anne Pradines
Isabelle Raymond-Letron
  • Fonction : Auteur
Isabelle Rouquette
  • Fonction : Auteur
Emilie Bousquet
  • Fonction : Auteur
V. Lauwers-Cances
  • Fonction : Auteur
Thomas Filleron
Jacques Cadranel
M. Beau-Faller
  • Fonction : Auteur
Anne Casanova
  • Fonction : Auteur
Julie Milia
  • Fonction : Auteur
Gilles Favre
J. Mazieres
  • Fonction : Auteur

Résumé

Purpose: A crucial event in lung adenocarcinoma progression is the switch from an aerogenous spread toward an infiltrating tumor. Loss of RhoB expression has been suggested to be critical for lung cancer invasion. Here, we tested RhoB expression as a prognostic biomarker in non-small cell lung cancer (NSCLC) with a special focus on lepidic pattern. Experimental Design: We analyzed RhoB expression using both IHC and RT-qPCR in two series of operated patients (n ¼ 100 and 48, respectively) and in a series of advanced lepidic adenocarcinoma (n ¼ 31) from different hospitals. Next, we examined the role of RhoB in lung cancer progression in transgenic mice that express inducible EGFR L858R crossed with Rhob null mice. Results: We identified that loss of RhoB expression was strongly associated with worse survival (P ¼ 0.0001) and progression-free survival (P < 0.001) in the first series. We then confirmed these results after multivariate analyses of the second series. In the series of adenocarcinoma with lepidic features issued from a clinical trial (IFCT-0401), we showed that loss of RhoB expression was associated with higher aggressiveness of stage IV. Finally, we showed that EGFR L858R /Rhob þ/þ mice developed mainly diffuse lung tumors with a lepidic pattern, whereas EGFR L858R /Rhob þ/À and EGFR L858R /Rhob À/À developed a greater number of tumors, and aggressive adenocarcinomas with invasive properties. Conclusions: We showed that RhoB is not only a strong prognostic factor in NSCLC but it is also critical for the acquisition of an aggressive phenotype of adenocarcinoma. Clin Cancer Res; 1-10. Ó2014 AACR.
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hal-03026035 , version 1 (26-11-2020)

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Olivier Calvayrac, Anne Pradines, Isabelle Raymond-Letron, Isabelle Rouquette, Emilie Bousquet, et al.. RhoB Determines Tumor Aggressiveness in a Murine EGFRL858R-Induced Adenocarcinoma Model and Is a Potential Prognostic Biomarker for Lepidic Lung Cancer. Clinical Cancer Research, 2014, 20 (24), pp.6541-6550. ⟨10.1158/1078-0432.CCR-14-0506⟩. ⟨hal-03026035⟩
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