PPBP and ovarian cancer: The transcription factor myeloid ecotropic viral integration site 1 (MEIS1) binds to a specific region on the promoter of the CXCL7 gene and induces the synthesis and secretion of CXCL7 in cells of ovarian cancer, thus triggering the recruitment of CD8+ T lymphocytes in ovarian cancer (Karapetsas et al., 2018).