On October 2, 2019 Nektar Therapeutics (Nasdaq: NKTR) reported the acceptance of five clinical and preclinical data abstracts for its immuno-oncology portfolio at the 2019 Society for Immunotherapy of Cancer (SITC) (Free SITC Whitepaper) Annual Meeting (Press release, Nektar Therapeutics, OCT 2, 2019, View Source [SID1234540028]). The presentations include an oral session with a presentation of updated data from the PIVOT-02 study of bempegaldesleukin (NKTR-214, bempeg) with nivolumab in patients with first-line metastatic melanoma. The 2019 SITC (Free SITC Whitepaper) Annual Meeting is being held from November 6 to November 10, 2019, at the Gaylord National Hotel & Convention Center in National Harbor, Maryland.

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Details of the oral presentation are as follows:

Abstract Title: "Clinical activity, including deepening of response, of BEMPEG plus NIVO in previously untreated patients with metastatic 1L Melanoma: results from the Phase 1/2 PIVOT-02 Study"
Abstract: O35
Presenter: Dr. Adi Diab, MD Anderson Cancer Center
Session Title: Concurrent Session 310: Combination Phase 1-2 Clinical Trials
Date: Saturday, November 9, 2019, 5:15 p.m. – 5:30 p.m. Eastern Standard Time

Details of the poster presentations are as follows:

Abstract P619: "NKTR-255, a polymer-conjugated IL-15 receptor agonist, enhances efficacy of therapeutic monoclonal antibodies with ADCC activity in solid tumor models", Kivimäe, S., et al.
Session Date and Time: Friday, November 8th from 7:00 a.m. – 8:00 p.m. Eastern Standard Time

Abstract P623: "Bempegaldesleukin in combination with local radiation and systemic checkpoint blockade induces a robust systemic anti-tumor immunity", Pieper, A., et al.
Session Date and Time: Friday, November 8th from 7:00 a.m. – 8:00 p.m. Eastern Standard Time

Abstract P622: "Characterization and comparison of NKTR-255, a polymer-conjugated IL-15 versus IL-15 superagonist", Miyazaki, T., et al.
Session Date and Time: Saturday, November 9th from 7:00 a.m. – 8:00 p.m. Eastern Standard Time

Details of the Trials in Progress poster presentation are as follows:

Abstract P387: "A Multicenter, Open-Label, Exploratory Platform Study to Evaluate Biomarkers and Immunotherapy Combinations for the Treatment of Patients with Metastatic Castration-resistant Prostate Cancer (PORTER)", Nissola, L., et al.
Session Date and Time: Friday, November 8th from 7:00 a.m. – 8:00 p.m. Eastern Standard Time

About Bempegaldesleukin (NKTR-214)
Bempegaldesleukin is designed to stimulate cancer-killing immune cells in the body by targeting CD122 receptors found on the surface of these immune cells. CD122, which is also known as the Interleukin-2 receptor beta subunit, is a key signaling receptor that is known to increase proliferation of these effector T cells.1 In clinical and preclinical studies, treatment with bempegaldesleukin resulted in expansion of these cells and mobilization into the tumor micro-environment.2,3

About NKTR-255
NKTR-255 is an IL-15 receptor agonist designed to engage the IL-15 pathway to stimulate and expand natural killer (NK) cells and promote the survival and expansion of central memory CD8+ T cells without inducing suppressive regulatory T cells. Through optimal engagement of the IL-15Rα/IL-2Rγ receptor complex, NKTR-255 enhances formation of long-term immunological memory which may lead to sustained anti-tumor immune response. Native rhIL-15 is rapidly cleared from the body and must be administered frequently and in high doses limiting its utility due to toxicity. NKTR-255 is designed with IL-15 receptor alpha specificity to optimize biological activity and is uniquely engineered to provide optimal exposure and an improved safety profile.