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Positive Preclinical Data for NKTR-214, an Investigational Cancer Immunotherapy Targeting the IL-2 Receptor Complex, Presented at AACR Annual Meeting 2013
Date:4/7/2013

ults in significantly altered immune cell populations in the tumor microenvironment compared to the clinically validated IL-2 protein therapy, aldesleukin.  Specifically, NKTR-214 maintains high affinity for the IL-2 receptor subunit beta, which activates tumor-killing T cells within the tumor microenvironment.  At the same time, NKTR-214 exhibits up to 100-fold reduced affinity to the IL-2 receptor subunit alpha-beta, which activates immuno-suppressive regulatory T-cells.  In a well-validated animal model of melanoma, NKTR-214 demonstrated significantly improved dosing, at once every 9 days as compared to twice a day dosing with aldesleukin.

The data was presented today at the AACR Annual Meeting 2013 in Poster Session, Immunology 2, (Abstract #482): Charych, et al., "Tipping the balance in the tumor microenvironment: An engineered cytokine (NKTR-214) with altered IL-2 receptor binding selectivity and improved efficacy in a mouse melanoma model."About Nektar 
Nektar Therapeutics is a biopharmaceutical company developing novel therapeutics based on its PEGylation and advanced polymer conjugation technology platforms. Nektar has a robust R&D pipeline of potentially high-value therapeutics in pain, oncology and other therapeutic areas.  In the area of pain, Nektar has an exclusive worldwide license agreement with AstraZeneca for naloxegol (NKTR-118), an investigational drug candidate, which has completed Phase 3 clinical development as a once- daily, oral tablet for the treatment of opioid-induced constipation.  This agreement also includes NKTR-119, an earlier stage development program that is a co-formulation of naloxegol and an opioid. In the proprietary pipeline, NKTR-181, a novel mu-opioid analgesic candidate for chronic pain conditions, is in Phase 2 development in osteoarthritis patients with chronic knee pain.  NKTR-192, a novel mu-opioid analgesic in development to treat acute pain is in Phase 1 clinica
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