Figure 2B showed the mRNA levels of the four OAS genes obtained from GEPIA database analysis, the mRNA expressions of OAS1, OAS2, OAS3, and OASL were all higher in BLCA tissues than in the normal tissues, especially the expression of OAS3 and OASL is significant (cut off: |logFC|> 1 and q-value < 0.01). The gene discussed is OAS2; the disease is bladder transitional cell carcinoma.