Nektar and Collaborators Present Late-breaking Results from Phase 2 Study of NKTR-255 for the Treatment of Radiation Induced Lymphopenia in Locally Advanced Non-Small Cell Lung Cancer Patients at Society for Immunotherapy of Cancer (SITC) Annual Meeting
NKTR-255 administered post completion of concurrent chemoradiation and in combination with durvalumab demonstrated statistically significant lymphocyte recovery compared to historical controls at week 8 –
– Pharmacodynamic data show NKTR-255 increased NK cell proliferation and markers of NK cell activation –
Excerpt from the Press Release:
SAN FRANCISCO, Nov. 7, 2024 /PRNewswire/ — Nektar Therapeutics (Nasdaq: NKTR) and collaborators at The University of Texas MD Anderson Cancer Center today presented late-breaking results from a Phase 2 study evaluating NKTR-255 for the treatment of radiation induced lymphopenia after concurrent chemoradiation in locally advanced non-small cell lung cancer (NSCLC) patients at the Society for Immunotherapy of Cancer (SITC) 39th Annual Meeting.
NKTR-255 is a novel polymer-conjugated IL-15 agonist, designed to activate, proliferate and expand natural killer (NK) and CD8+ T-cells, as well as to promote the survival and expansion of memory CD8+ T cells. NKTR-255 is currently being evaluated in combination with cellular therapies and immune checkpoint inhibitors. Previous pre-clinical and clinical studies have shown that NKTR-255 can proliferate a range of immune cells and augment lymphocyte trafficking.1,2,3
The results from the preplanned interim analysis from the REStoring lymphoCytes Using NKTR-255 after chemoradiothErapy in solid tumors (RESCUE) trial suggest that NKTR-255 effectively reversed radiation induced lymphopenia in patients with locally advanced NSCLC receiving consolidation therapy with durvalumab. Interim pharmacodynamic data demonstrated statistically significant superiority of the eight-week absolute lymphocyte count (ALC) with NKTR-255 post chemoradiation and in combination with durvalumab versus non-contemporaneous control groups who received either chemoradiation alone or chemoradiation in combination with durvalumab.
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