Interestingly, by knocking down NNMT in PRDX6‐WT‐overexpressing cells (Figure5A), we found that NNMT KD markedly abolished the promoting effect of PRDX6‐WT on the growth and proliferation of ovarian cancer cells, as evidenced by cell viability and colony formation assays (Figure 5B,C). This evidence concerns the gene NNMT and ovarian cancer.