To investigate the biological functions of HNF4G in lung cancer, we transfected small interference RNAs (siRNAs) targeting HNF4G (siRNA-1, siRNA-2 and siRNA-3) or control siRNA (siNC) into H358 and H292 cells, which expressed relatively higher level of HNF4G (Figure 3A). Here, HNF4G is linked to lung cancer.