Leap Therapeutics Presents Updated Data for DKN-01 in Esophagogastric Cancer Patients at SITC 2020 35th Annual Meeting; - High Levels of Tumoral DKK1 Expression Correlated with Improved Clinical Outcomes in Heterogenous Esophagogastric Cancer Patients Tre
Leap Therapeutics, Inc. (Nasdaq: LPTX), a biotechnology company focused on developing targeted and immuno-oncology therapeutics, today announced the presentation of clinical data from its Phase 1b/2a clinical trial of DKN-01 in patients with advanced esophagogastric cancer (EGC) at the Society for Immunotherapy of Cancer's 35th Anniversary Annual Meeting. DKN-01 is a humanized monoclonal antibody that binds to and blocks the activity of the Dickkopf-1 (DKK1) protein.
In the study, high levels of tumoral DKK1 expression correlated with improved clinical outcomes in heterogeneous EGC patients treated with DKN-01 as monotherapy or in combination with pembrolizumab or paclitaxel. Pooled data for the 69 patients in the study for whom tumoral DKK1 expression data is available demonstrated that DKK1-high patients experienced higher overall response rates (ORR), a doubling of median progression-free survival (PFS), and longer median overall survival (OS) as compared to DKK1-low patients. Additionally, DKK1-high anti-PD-1/PD-L1 refractory patients treated with DKN-01 plus pembrolizumab experienced longer PFS and OS compared to DKK1-low patients, suggesting that DKK1 tumoral expression may serve as a predictive biomarker to identify patients for treatment with DKN-01 in combination with anti-PD-1 antibodies. No notable differences were found in baseline MSS, TMB, or PD-L1 expression between DKK1-high versus DKK1-low gr...