Clinical trial NCT04955262: A CD8 Positron Emission Tomography With Computed Tomography (PET/CT) Study Using ⁸⁹Zr Df-IAB22M2C in Patients With Metastatic Melanoma Receiving Bempegaldesleukin (NKTR-214) and Nivolumab
Official title: A Phase 1b, Open Label, Multicenter Study of Positron Emission Tomography With Computed Tomography (PET/CT) Using ⁸⁹Zr Df-IAB22M2C (CD8 PET/CT Tracer) in Patients With Metastatic Melanoma Receiving Bempegaldesleukin (NKTR-214) and Nivolumab
Study type: INTERVENTIONAL
Overall status: WITHDRAWN
Phase: PHASE1
Conditions: Metastatic Melanoma
Keywords: CD122
Immuno-oncology
Immunotherapy
Natural Killer Cells
Interleukin-2
IL-2
Nivolumab
NKTR-214
Bempegaldesleukin
Opdivo®
PD-L1
PET/CT
CD8
T-cell
Imaging
Melanoma
TIL
Lead sponsor: Nektar Therapeutics
Sponsor class: INDUSTRY
Collaborators: name: ImaginAb, Inc.
First posted: 2021-07-08
Enrollment: 0
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NON_RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: The main purpose of this study is to investigate the utility of the new investigational imaging agent ⁸⁹Zr Df-IAB22M2C (CD8 PET/CT tracer) to monitor CD8 T-cell expansion and trafficking within tumors and associated tissues in patients with metastatic melanoma undergoing treatment with bempegaldesleukin and nivolumab as a single agent and in combination.

Detailed description: NKTR-214 is a cytokine (Investigational Agent), a protein which is found to expand certain immune cells (known as CD8+ T Cells and Natural Killer Cells) to promote their anti-tumor effects. Nivolumab is a full human monoclonal antibody that binds to a molecule called PD-1 (programmed cell death protein 1) on immune cells and promotes anti-tumor effects.

⁸⁹Zr Df-IAB22M2C is an experimental injected molecule containing a radioactive atom; this molecule attaches to CD8+ T cells and allows those T cells to be seen on PET/CT scans.

Part 1: A total of 4 eligible patients will be enrolled into part 1. During Cycle 1, patients will receive single agent NKTR-214, 3 injections ⁸⁹Zr Df-IAB22M2C , and 6 PET/CT scans. Starting with Cycle 2, patients will receive NKTR-214 in combination with nivolumab q3w for the remainder of the study.

Once the PET/CT imaging data from Part 1 have been reviewed, Part 2 will open for enrollment.

Part 2: A total of 20 eligible patient will be enrolled into part 2. During Cycle 1, patients will receive single agent NKTR-214 or nivolumab, 2 injections of ⁸⁹Zr Df-IAB22M2C , and 3 PET/CT scans. In Cycle 2 and beyond, patients will receive NKTR-214 in combination with nivolumab q3w for the remainder of the study. During Cycle 2, patients will receive 1 injection of ⁸⁹Zr Df-IAB22M2C and 1 PET/CT scan.

All patients enrolled in the study will be closely monitored to determine if there is response to the treatment as well as for any side effects that may occur. The efficacy of the combination will be assessed using objective response rate (ORR). Exploratory immunological biomarkers in plasma and tumor samples will evaluate immune activation.

Eligibility criteria: Key Inclusion Criteria:

* Provide written, informed consent to participate in the study and follow the study procedures
* Eastern Cooperative Oncology Group (ECOG) performance status of ≤ 1
* Measurable disease per RECIST 1.1 criteria
* Patients must have histologically confirmed metastatic melanoma with measurable, stage IV disease per American Joint Committee on Cancer (AJCC) staging system
* In patients with a single RECIST measurable lesion, the lesion must be a non-cutaneous lesion.
* Fresh biopsy
* Treatment-naive patients (i.e., no prior systemic anticancer therapy for unresectable or metastatic melanoma).

Key Exclusion Criteria:

* Patients who have an active, known or suspected autoimmune disease
* Patients must not have received prior IL-2 therapy
* Prior treatment with an anti PD-1, anti PD-L1, or anti cytotoxic T lymphocyte associated protein 4 (anti CTLA-4) antibody, agents that target IL-2, or any other antibody or drug specifically targeting T cell co-stimulation or immune checkpoint pathways
* Need for \>2 antihypertensive medications for hypertension management

Other protocol-defined inclusion/exclusion criteria apply

Primary outcomes:
measure: Lesion uptake of 89Zr-Df-IAB22M2C (CD8 PET/CT tracer) before and after monotherapy treatment with mechanistically different immunotherapies, bempegaldesleukin (NKTR-214) and nivolumab as well as after combination treatment with NKTR-214 and nivolumab.
timeFrame: Approximately 18 months
measure: Correlate ⁸⁹Zr Df-IAB22M2C lesion uptake with lesion size and ORR using PET/CT scans
timeFrame: Approximately 18 months
Secondary outcomes:
Other outcomes:
Locations:
city: Duarte
country: United States
facility: Investigational Site - Duarte
state: California
city: Portland
country: United States
facility: Investigational Site - Portland
state: Oregon
city: Philadelphia
country: United States
facility: Investigational Site - Philadelphia
state: Pennsylvania
Study officials:
affiliation: Nektar Therapeutics
name: Study Director
role: STUDY_DIRECTOR
References: