RRBP1 and ovarian cancer: Furthermore, PTF1A is involved in the Notch-mediated HES/HEY network, which has been found by many studies being activated in ovarian cancer (Bell et al., 2011; Bocchicchio et al., 2019; Huang et al., 2019; Hubbard et al., 2019; Eoh et al., 2020).