To determine the expression pattern of OASL in PDAC, the adjacent and tumor samples from three databases (TCGA&GTEx, GSE16515, GSE15471) and Renji cohort were used for evaluating the mRNA expression level of OASL, illustrating that the abundance of OASL was greatly higher in PDAC samples compared with the adjacent pancreatic samples (Figure 1C). This evidence concerns the gene OASL and neoplasm.