Since the Cancer Cell Line Encyclopedia (CCLE) as a comprehensive database provides large-scale sequencing data including mRNA-seq expression data for over 900 cell lines [37], we screened for gene expression of ACE2 and TMPRSS2 in this data set, which enabled us to identify potential susceptible cell lines prone to SARS-CoV-2 virus entry. This evidence concerns the gene TMPRSS2 and cancer.