On October 12, 2022 Leap Therapeutics, Inc. (Nasdaq:LPTX), a biotechnology company focused on developing targeted and immuno-oncology therapeutics, reported that the first patient has been enrolled in the randomized controlled Part C of the ongoing DisTinGuish study to evaluate DKN-01, Leap’s anti-Dickkopf-1 (DKK1) antibody, in combination with tislelizumab, BeiGene’s anti-PD-1 antibody, and chemotherapy compared to a tislelizumab and chemotherapy control arm, in patients with gastric or gastroesophageal junction cancer (G/GEJ) (Press release, Leap Therapeutics, OCT 12, 2022, View Source [SID1234621959]).
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"We are excited to announce another important milestone for our DKN-01 clinical program in combination with our partner BeiGene’s tislelizumab, advancing this unique combination therapy into Part C of the DisTinGuish study," said Cynthia Sirard M.D., Chief Medical Officer of Leap Therapeutics. "The data to date from the DisTinGuish study show the DKN-01 plus tislelizumab combination therapy to be a compelling potential treatment for patients with G/GEJ cancer with response rates and survival outcomes that exceeded the benchmarks. This first randomized controlled study for DKN-01 will characterize the treatment effect in first-line patients, with a particular emphasis on those in the aggressive DKK1-high population."
The DisTinGuish study (NCT04363801) is a Phase 2 study of DKN-01 in combination with tislelizumab and standard of care (SOC) chemotherapy in patients with inoperable, locally advanced, G/GEJ adenocarcinoma. Part C of the DisTinGuish study will enroll approximately 160 first-line, HER2-negative patients. Patients will be randomized 1:1 to evaluate DKN-01 in combination with tislelizumab and standard of care (SOC) chemotherapy, compared to tislelizumab and SOC chemotherapy. The primary objective is progression-free survival (PFS) in DKK1-high patients. Secondary objectives of Part C include PFS in all patients regardless of DKK1 expression, as well as overall survival and objective response rate as measured by RECIST v1.1 in DKK1-high and all patients.
ABOUT DKN-01
DKN-01 is a humanized monoclonal antibody that binds to and blocks the activity of the Dickkopf-1 (DKK1) protein. DKK1 modulates the Wnt/Beta-catenin and PI3kinase/AKT signaling pathways and has an important role in promoting tumor proliferation, metastasis, angiogenesis, and in mediating an immune suppressive tumor microenvironment through enhancing the activity of myeloid-derived suppressor cells and downregulating NK cell ligands on tumor cells. The U.S. Food and Drug Administration has granted DKN-01 Orphan Drug Designation for the treatment of gastric and gastroesophageal junction cancer and Fast Track Designation in combination with tislelizumab for the treatment of patients with gastric and gastroesophageal junction adenocarcinoma whose tumors express high DKK1 protein, following disease progression on or after prior fluoropyrimidine- and platinum- containing chemotherapy and if appropriate, human epidermal receptor growth factor (HER2)/neu-targeted therapy.