ERAS and gastric cancer: In this study, 8 cell strains from different sources, GC lymph node metastasis, GC liver metastasis, GC ascites and GC tissues, with different differentiation degrees, were chosen to determine whether a full-length ERas mRNA exists and to elucidate the difference of degree of ERas expression among these GC strains by RT-PCR, real-time PCR and western blotting.