AREG and colorectal carcinoma: Since epidermal growth factor receptor (EGFR) signalling plays a key role in CRC growth and the EGF ligand amphiregulin (AREG) is expressed by HCT116 cells (Nagathihall et al, 2014) and known to be packaged into CRC‐derived exosomes (Higginbotham et al, 2011), we tested whether AREG was present on EVs from glutamine‐depleted HCT116 cells.