Beyond RAS: The Role of Epidermal Growth Factor Receptor (EGFR) and its Network in the Prediction of Clinical Outcome During Anti-EGFR Treatment in Colorectal Cancer Patients

Title:Beyond RAS: The Role of Epidermal Growth Factor Receptor (EGFR) and its Network in the Prediction of Clinical Outcome During Anti-EGFR Treatment in Colorectal Cancer Patients

Volume: 15 Issue: 13

Author(s): Riccardo Giampieri, Giuseppe Aprile, Michela Del Prete, Luca Faloppi, Maristella Bianconi, Marta Bonotto, Giampiero Fasola, Stefano Cascinu and Mario Scartozzi

Affiliation:

• Medical Oncology, Azienda Ospedali Riuniti-Universita Politecnica delle Marche, Ancona, Italy.,Italy

Keywords: Cetuximab, cMET, colorectal cancer, EGFR, HER-3, IGF1-R, panitumumab.

Abstract: Although the extended RAS analysis allows a better identification of patients potentially candidates to anti- EGFR monoclonal antibodies, a significant proportion of tumours may still reveals refractory to such a treatment approach. In these latter cases patients are then exposed to unnecessary toxicities without clinical benefit. Among many further biological factors that may have a role in determining resistance/sensitivity to EGFR-inhibitors, the EGFR itself, other members of the HER family (i.e. HER-2 and HER-3) as well as other surface receptors such as the IGF-1 receptor seem of particular interest. Preclinical models have shown that these receptors are biologically connected to each other and able to directly or indirectly influence the downstream molecular pathways. In the presence of abnormal expression of these biological determinants, intracellular pathways may become independent from the receptor-targeting treatment thus making therapies directed against the receptor ineffective. Clinical observations and translational studies seem to confirm these findings. The Authors have reviewed the literature and have selected recent clinical reports focusing on translational research on the EGFR itself or on other molecules that may interfere with this pathway. We also discuss potential future developments in this area.

Cite this article as:

Giampieri Riccardo, Aprile Giuseppe, Prete Del Michela, Faloppi Luca, Bianconi Maristella, Bonotto Marta, Fasola Giampiero, Cascinu Stefano and Scartozzi Mario, Beyond RAS: The Role of Epidermal Growth Factor Receptor (EGFR) and its Network in the Prediction of Clinical Outcome During Anti-EGFR Treatment in Colorectal Cancer Patients, Current Drug Targets 2014; 15(13) . https://dx.doi.org/10.2174/1389450115666141109212801