IHC staining on tumour sections of xenografts and metastasized organs demonstrated that the upregulation of BART1 significantly reduced the expression of PTEN (see Fig. 3d) but clearly increased the phosphorylation levels of p-Akt, p130Cas, p-Shc and p-ERK1/2 in 5-8F-BART1 tumours compared with the 5-8F-mock tumours (Fig. 4c). The gene discussed is ARL2BP; the disease is neoplasm.