Thus, to investigate the modulation of tumor cell viability and proliferation by ML cells, we co-cultured A2780 population with ML-Ddx4+ cells derived from either healthy ovaries or NS-EOCs, separated by pored inserts and, at different time points of the culture, namely 24 (T1), 48 (T2), and 72 (T3) h, we measured the extent of cell divisions in A2780 cells by the carboxyfluoresceinsuccinimidyl ester (CFSE) assay. The gene discussed is DDX4; the disease is neoplasm.