RSF1 and ovarian serous carcinoma: For example, we have reported that the expression levels of Nac1, Rsf-1 (HBXAP), fatty acid synthase and annexin A11 were significantly higher in recurrent, high-grade ovarian serous carcinoma specimens after chemotherapy and, more importantly, expression of these genes played a causal role in conferring drug resistance in vitro[3], [4], [5], [6], [7], [8].