OSLO, Norway and SAN FRANCISCO, Aug. 12, 2020 /PRNewswire/ -- Vaccibody AS and Nektar Therapeutics (NASDAQ: NKTR) today announced that the first patient has been dosed in the combination therapy of the Phase 1/2a study evaluating bempegaldesleukin (bempeg), Nektar's CD122-preferential IL-2 pathway agonist, with VB10.NEO, Vaccibody's personalized neoantigen cancer vaccine, in patients with advanced squamous cell carcinoma of the head and neck (SCCHN).
"We're pleased to advance our collaboration with Vaccibody to evaluate the potential of bempeg given with a personalized vaccine, VB10.NEO, in patients with advanced head and neck cancer," said Jonathan Zalevsky, Ph.D., Chief Research & Development Officer at Nektar. "The rationale for this clinical study is supported by our promising preclinical data which demonstrated how a personalized cancer vaccine and a T cell proliferator can work synergistically to induce maximal expansion of vaccine-induced T cell clones, provide deep and durable responses and, at the same time, offer specific anti-tumor immunity."
VB10.NEO is designed to specifically activate a patient's immune system to tumor-specific antigens, called neoantigens, while bempeg is designed to expand and proliferate tumor antigen-specific T cells in the periphery and in the tumor microenvironment. Addition of bempeg to VB10.NEO is intended to drive maximal expansion of vaccine-induced neoantigen-specific T cells for the treatment of cancer.
At the 2019 Society for Immunotherapy of Cancer (SITC) Annual Meeting, Vaccibody presented interim data for VB10.NEO in a group of patients with various solid tumor types who had all received multiple lines of prior anti-cancer therapy and had been treated with at least one checkpoint inhibitor (CPI) (nivolumab or pembrolizumab) for a range of 5 to 32 months. The data presented showed that 50 percent (7/14) of patients treated with VB10.NEO achieved clinical responses, including four patients with SCCHN. Clinical response was defined as either >10% reduction in the target lesions (as identified at screening) or converting progressive lesions into stable lesions (