• Lifastuzumab vedotin DNIB0600A (LIFA) is an anti-NaPi2b antibody conjugated to a potent anti-mitotic agent (MMAE). • This phase Ib study investigated LIFA in patients with recurrent platinum-sensitive ovarian cancer. • LIFA in combination with carboplatin has an acceptable safety profile when administered by IV infusion Q3W. • Overall confirmed objective responses were observed in 59% and CA-125 responses in 81% of evaluable patients. • Response rate and duration of response are important factors for evaluation of antibody-drug conjugates in ovarian cancers.
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