To determine whether FAO is increased in AGS cells treated with lymphatic metastatic GC cell-exosomes, β-oxidation rate and CPT1 activity detection showed that both HGC-27-L-exosomes and HGC-27-exosomes increased FAO in AGS cells compared to AGS-exosomes (Figures 3A, B). This evidence concerns the gene CPT1A and gastric cancer.