However, among the various <i>KRAS</i> mutations, that which encodes the G13D mutant protein (KRAS<sup>G13D</sup>) behaves differently; for unknown reasons, KRAS<sup>G13D</sup> CRC patients benefit from the EGFR-blocking antibody cetuximab.
These results reveal that KRAS G13D is responsive to neurofibromin-stimulated hydrolysis and suggest that a subset of <i>KRAS</i> G13-mutated colorectal cancers that are neurofibromin-competent may respond to EGFR therapies.
Recruitment, particularly of patients with the rare G13D mutation, will demonstrate the ability for international collaboration to run prospective trials in small colorectal cancer molecular subgroups.
To accomplish this, we first carried out an in silico analysis of RNA-seq databases and found that the distribution of alternative splicing isoforms of genes RPL13, HSP90B1, ENO1, EPDR1 and ZNF518B was altered in human CRC cell lines carrying the G13D KRAS mutation when compared to cell lines carrying wild-type KRAS.
We have investigated Ca(2+) signalling in two human colorectal cancer cell lines and their isogenic derivatives in which the allele encoding oncogenic K-Ras (G13D) was deleted by homologous recombination.