Nektar Therapeutics is in focus

Nektar presents new clinical, preclinical data from immuno-oncology pipeline

Nektar Therapeutics (NKTR) announced the presentation of five clinical and preclinical data abstracts focused on its immuno-oncology portfolio at the 2019 Society for Immunotherapy of Cancer Annual Meeting.

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Nektar Therapeutics is in focus, Stockwinners

New clinical results from the PIVOT-02 Phase 1/2 study were shared in an oral presentation titled, “Clinical activity of BEMPEG plus NIVO in previously untreated patients with metastatic melanoma: updated results from the Phase 1/2 PIVOT-02 Study” during the Combination Phase 1-2 Clinical Trials Session on Saturday, November 9th.

Additional preclinical data presented at the annual meeting highlighted NKTR-255, an IL-15 agonist discovered by Nektar.

The presentations demonstrated that NKTR-255 enhanced activity of antibody-dependent cellular cytotoxicity against tumor cells in vitro, and that it also enhanced in vivo efficacy of ADCC-inducing antibodies in models of human solid tumors.

NKTR-255 is designed to engage the IL-15 pathway to stimulate and expand natural killer cells and promote the survival and expansion of memory CD8+ T cells without inducing suppressive regulatory T cells.

Nektar product pipeline, Stockwinners

NKTR-255 is currently being evaluated in a Phase 1/2 clinical trial in patients with either relapsed or refractory Non-Hodgkin’s lymphoma or multiple myeloma.

“The data presented at this year’s SITC meeting continue to showcase the potential of our I-O portfolio, most notably our key IL-2 pathway program, bempeg, and our new IL-15 pathway program, NKTR-255,” said Jonathan Zalevsky, Ph.D., Chief Research & Development Officer at Nektar.

“The 18-month follow-up data presentation for the Stage IV melanoma patients in our PIVOT-02 study reinforces the promise of BEMPEG and NIVO to work synergistically to achieve a deepening of response over time, while maintaining a favorable safety and tolerability profile. We’re pleased that at this 18 month timepoint, 85% of patients who achieved responses have ongoing responses and median PFS has not yet been reached.”

Separately, Nektar Therapeutics (NKTR) announced updated results from the first-in-human Phase 1a study of NKTR-358, a novel T regulatory cell stimulator in development for the treatment of autoimmune and other chronic inflammatory conditions.

Nektar reports new data, Stockwinners

The data, which were presented at the 2019 Annual Meeting of the American College of Rheumatology in Atlanta, show that treatment with NKTR-358 led to a marked and selective dose-dependent expansion in the numbers and proliferative capacity of FoxP3+CD25bright Treg cells, and a measurable activation of Treg cells.

These data are a continuation of initial results reported at 2019 Annual European Congress of Rheumatology in June 2019.

NKTR-358 is designed to treat autoimmune and inflammatory conditions by correcting the immune system imbalance that results from reduced numbers and impaired function of immune-regulating Treg cells.

NKTR-358 works by targeting the interleukin-2 receptor complex to stimulate the proliferation and activation of Treg cells.

NKTR-358 was discovered by Nektar and is being co-developed and commercialized in partnership with Eli Lilly (LLY).

Eli Lilly announces Alimta label expanded by FDA, Stockwinners
Eli Lilly and Nektar report new data, Stockwinners

“We’re pleased to report that final results from our first-in-human Phase 1a study continue to support the positive safety and tolerability profile of NKTR-358, while reinforcing its selective and measurable impact on the numbers, expansion and activation of regulatory T cells or Tregs,” said Brian Kotzin, M.D., senior VP, Clinical Development and NKTR-358 Program Lead at Nektar.

“Autoimmune and inflammatory diseases are marked by an imbalance in the body’s self-tolerance and self-regulatory immune pathways, and the ability of NKTR-358 to expand functional Tregs could help restore normal balance.

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Bempegaldesleukin data should send Nektar shares higher

Nektar presents biomarker, clinical data from PIVOT-02 Phase 2 study

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Nektar presents biomarker, clinical data from PIVOT-02 Phase 2 study, Stockwinners

Nektar Therapeutics (NKTR) announced that biomarker and clinical data from PIVOT-02 was presented at the 2019 American Society of Clinical Oncology Meeting in Chicago, Illinois.

#Bempegaldesleukin is an investigational, CD122-preferential IL-2 pathway agonist designed to provide sustained signaling through the IL-2 beta-gamma receptor.

Bempegaldesleukin is under investigation in clinical trial NCT03729245 (A Study of NKTR-214 in Combination With Nivolumab Compared With the Investigator’s Choice of a Tyrosine Kinase Inhibitor (TKI) Therapy (Either Sunitinib or Cabozantinib Monotherapy) for Advanced Metastatic Renal Cell Carcinoma (RCC)).

PIVOT-02 is an ongoing Phase 2 study evaluating bempeg in combination with nivolumab in solid tumors.

Exploratory biomarker analyses of PIVOT-02 baseline tumor biopsies identified immune signatures that potentially enrich for response in patients with 1L metastatic melanoma and not 1L metastatic urothelial carcinoma.

Notable response rates were seen in both 1L metastatic melanoma and 1L metastatic urothelial cancer patients, regardless of PD-L1 status or unfavorable tumor microenvironments.

At a median time of follow-up of 12.7 months, confirmed objective response rate was 53% in efficacy-evaluable patients, with 34% of patients achieving confirmed complete responses. 42% of patients achieved a maximum reduction of 100% in target lesions. DCR, also known as disease control rate was 74%.

Median time to response was 2 months. Median duration of response was not reached. At the 12.7 month median follow-up, data were too immature to calculate median progression-free survival. 80% of patients with responses have ongoing responses. Amongst the 35 patients with known pre-treatment PD-L1 status, ORR in PD-L1 negative patients was 6/14 and in PD-L1 positive patients was 13/21.

One of three patients with unknown PD-L1 baseline status experienced a CR.

A total of 6/41 of patients experienced a Grade 3 or higher TRAE with 4/41 patients discontinuing treatment due to a TRAE. A total of 41 patients have been treated at the RP2D with 3 patients discontinuing prior to 1st scan due to an unrelated treatment-emergent adverse event and patient decision.

A Phase 3 trial evaluating bempeg in combination with nivolumab versus nivolumab in first-line advanced melanoma patients is currently recruiting patients.

A Phase 2 pivotal trial evaluating bempeg in combination with nivolumab in first-line metastatic urothelial cancer is currently recruiting patients.

 Piper Jaffray

Piper Jaffray analyst Tyler Van Buren reiterates an Overweight rating and $100 price target on Nektar, and believes shares should be up significantly on Monday following updated data from the bempegaldesleukin + nivo PIVOT-02 melanoma cohort.

The increase in complete response rate from 24% to 34% at just beyond 12 months is more than the analyst and investors were anticipating and “the waterfall plot is like nothing [he has] ever seen in solid tumors.”

Ultimately, Van Buren believes the high quality of responses and the ability to maintain patients on therapy is contributing to robust durability, which increases his confidence in the ultimate outcome of the Phase III trial which will have a final mPFS evaluation around Q3 of 2020.

NKTR closed at $31.32.

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