Bempegaldesleukin and Pembrolizumab With or Without Chemotherapy in Locally Advanced or Metastatic Solid Tumors

This study is to assess the safety and tolerability, and to assess the preliminary clinical benefit of NKTR-214 when combined with pembrolizumab (KEYTRUDA®) with or without chemotherapy.

The study is comprised of two groups; dose optimization and dose expansion cohorts.

Dose Optimization included first-line and second-line advanced or metastatic solid tumors including non-small cell lung cancer (NSCLC)

The dose expansion cohort will include first-line NSCLC patients.

NKTR-214 is a cytokine (investigational agent) that is designed to target CD122, a protein which is found on certain immune cells (known as CD8+ T Cells and Natural Killer Cells) to expand these cells to promote their anti-tumor effects. Pembrolizumab is a programmed death receptor -1 (PD-1) blocking, fully humanized, engineered monoclonal antibody of IgG1 isotype that promotes anti-tumor effects.

The study will evaluate the clinical benefit, safety and tolerability of combining NKTR-214 with pembrolizumab with or without chemotherapy. Each dose expansion cohort will enroll approximately 100 new patients.

Dose Optimization evaluated an every three-week dose regimen (q3w) of NKTR-214 in combination with pembrolizumab given that the optimal dose and dosing schedule of NKTR-214 in combination with pembrolizumab remains unknown. The previously established recommended Phase 2 dose (0.006 mg/kg) of NKTR-214 was studied in combination with nivolumab.

Dose Expansion: NKTR-214 in combination with pembrolizumab will be evaluated in first-line non-small cell lung cancer (NSCLC). The NKTR-214 dose to be studied is 0.006 mg/kg q3w. This dose is based on the recommended phase 2 dose noted in the monotherapy trial with NKTR-214 (Study 15-214-01, NCT02869295) and an ongoing combination trial (16-214-02, NCT02983045). Pembrolizumab will be administered at a dose of 200mg q3w. Following data review for safety and efficacy, additional patients may be dosed using the findings from the dose optimization cohorts.

Eligibility Criteria:
Inclusion Criteria:

Dose Optimization and Dose Expansion Inclusion Criteria:

* Willing and able to provide written informed consent.
* Male or female patients, age 18 years or older at the time of signing the informed consent form (ICF).
* Life expectancy \> 12 weeks from the time of enrollment as determined by the Investigator.
* Eastern Cooperative Oncology Group (ECOG) performance status 0 or 1.
* Oxygen saturation ≥ 92% on room air for all indications.
* Measurable disease per RECIST 1.1.
* Patients with brain metastases are eligible if certain criteria are met.
* Availability of fresh or archival tumor tissue
* Patients must have a minimum of 6 months of response to any nonpalliative cancer-directed treatment

Dose Expansion Inclusion Criteria (Non-Small Cell Lung Cancer):

* Histologically confirmed diagnosis of stage IV NSCLC.
* Patients must have a minimum of 6 months of response to any nonpalliative cancer-directed treatment.
* Patients with actionable mutations with approved targeted therapy in NSCLC are excluded. Testing for mutations should be performed per standard of care.
* Must not have received anti-cancer therapy for treatment of metastatic lung cancer
* Must not have received prior immunotherapy

Exclusion Criteria:

* Use of an investigational agent or an investigational device within 28 days before administration of first dose of study drug(s).
* Females who are pregnant or breastfeeding.
* Patients who have an active autoimmune disease
* History of allergy or hypersensitivity to study drug components
* Evidence of clinically significant interstitial lung disease or active, noninfectious pneumonitis.
* Prior surgery or radiotherapy within 14 days of therapy.
* For Dose Optimization Cohort 1 only: Chemotherapy or biological therapy within 28 days of enrollment. Targeted therapy (e.g., tyrosine kinase inhibitors) within 14 days of enrollment. Patients with ongoing AEs related to prior cancer therapies will be excluded.
* Participant's inability to adhere to or tolerate protocol or study procedures

NOTE: Other protocol defined Inclusion/Exclusion criteria may apply