Title: 
MM-151 overcomes acquired resistance to cetuximab and panitumumab in colorectal cancers harboring EGFR extracellular domain mutations.
Abstract: 

Abstract
The anti-epidermal growth factor receptor (EGFR) antibodies cetuximab and panitumumab are used to treat RAS wild-type colorectal cancers (CRCs), but their efficacy is limited by the emergence of acquired drug resistance. After EGFR blockade, about 20% of CRCs develop mutations in the EGFR extracellular domain (ECD) that impair antibody binding and are associated with clinical relapse. We hypothesized that EGFR ECD-resistant variants could be targeted by the recently developed oligoclonal antibody MM-151 that binds multiple regions of the EGFR ECD. MM-151 inhibits EGFR signaling and cell growth in preclinical models, including patient-derived cells carrying mutant EGFR. Upon MM-151 treatment, EGFR ECD mutations decline in circulating cell-free tumor DNA (ctDNA) of CRC patients who previously developed resistance to EGFR blockade. These data provide molecular rationale for the clinical use of MM-151 in patients who become resistant to cetuximab or panitumumab as a result of EGFR ECD mutations.

Publication Date: 
Lunedì, Febbraio 29, 2016
PMID: 
26843189

 

Raggiungi l'Istituto di Candiolo

 
Come raggiungere l'Istituto di Candiolo

 

  •  Indirizzo per navigatori: Strada Provinciale 142 di Piobesi incrocio Strada Statale 23 del Sestriere

  •  Coordinate per navigatori: 44°58'01.6"N 7°34'00.0"E