SCN9A and ovarian carcinoma: There were no significant differences in mRNA expression levels of NaV1.2, NaV1.6, NaV1.7 and NaV1.9 between cancerous cells and normal ovarian tissues while the expression levels of NaV1.1, NaV1.3, NaV1.4, and NaV1.5 were higher in ovarian cancer cells compared to normal ovary cells.