BRD7, SMARCC2, ARID2, ACTL6A/B, SMARCC1, SMARCD1/2/3 are other key subunits of SWI/SNF, and recent studies have reported that mutations in these subunits cause gastric cancer (GC), colon cancer (CRC), hepatocellular carcinoma (HCC), head and neck squamous carcinoma (HSNC), breast cancer (BRCA) and other tumours.20, 21, 22, 23, 24, 25, 26, 27, 28, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53. This evidence concerns the gene ACTL6A and gastric cancer.