Serological analysis of plasma in patients with ovarian cancer depicted that the levels of active reverse transcriptase and immunoreactive antibodies directed against HERV-K were noticeable in these cases, in which in vitro study depicted that those dendritic cells derived from the same origin but loaded with HERV-K Env protein could induce immunity by production of T cells, INFγ, and HERV-K-specific cytotoxic T lymphocytes (CTL) [93] (Table 1). This evidence concerns the gene ERVW-1 and ovarian carcinoma.