Safety of SNK01 in Subjects With Pathologically Confirmed Metastatic and/or Unresectable Cancer Refractory to Conventional Therapy

Phase 1

Completed

• Conditions: Refractory Cancer; Metastatic Cancer; Recurrent Cancer; Unresectable Carcinoma; Solid Tumor, Adult; Advanced Cancer; Advanced Solid Tumor
• Interventions: Biological: SNK01; Drug: Avelumab; Drug: Pembrolizumab

• Registration Number: NCT03941262
• Lead Sponsor: NKGen Biotech, Inc.

Brief Summary

The purpose of the study is to evaluate the safety and preliminary efficacy of SNK01 (autologous natural killer cell), as a single agent and in combination with avelumab or pembrolizumab, for the treatment of subjects with advanced and/or metastatic refractory cancer that has failed three or more prior lines of conventional standard of care therapy.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2019-05-03
• Study First Submitted QC: 2019-05-06
• Study First Posted: 2019-05-07
• Study Start: 2019-07-15
• Primary Completion: 2023-02-17
• Study Completion: 2023-02-17
• Status Verified: 2023-07
• Last Update Submitted: 2023-11-08
• Last Update Posted: 2023-11-13

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 27

Inclusion Criteria

• Voluntary written informed consent signed by patient, obtained prior to study enrollment.

• Males and females ages 18 to 75 years, inclusive.

• Pathologically confirmed diagnosis of refractory cancer that has failed three or more prior lines of conventional standard of care therapy.

• Diagnosed with any histologically confirmed malignancy whose disease is confirmed to be metastatic and/or unresectable for which standard curative or beneficial treatments are no longer effective.

• Eastern Cooperative Oncology Group (ECOG) performance status <2.

• At least 4 weeks since any prior systemic therapy (excluding corticosteroid therapy) to treat the underlying malignancy (standard or investigational).

• At least 2 weeks since prior palliative radiotherapy.

• Adequate bone marrow function:

  • Neutrophils: 2.0-8.0 K/uL
  • Platelet Count: 140-440 K/uL
  • Hemoglobin: 10.0-18.0 g/dL
  • No ongoing transfusion requirements

• Adequate hepatic function:

  • Serum total bilirubin < 1.5 x upper limit of normal (ULN)
  • Serum albumin ≥ 3.0 g/dL
  • Alanine transaminase (ALT) and aspartate transaminase (AST) ≤ 2.5 x ULN
  • International normalized ratio (INR) ≤ 1.5 x ULN

• Adequate renal function with creatinine ≤ 2.0 mg/dL.

• Negative pregnancy test for women of childbearing potential and use of effective contraception (hormonal or barrier method of birth control) during study.

Exclusion Criteria

• Pregnant and/or lactating females.
• Life expectancy of less than three months.
• Currently being treated by "biological therapy" as defined by the National Cancer Institute (example: checkpoint inhibitors, adoptive cell transfer, monoclonal antibodies, treatment vaccines, cytokines, Bacillus Calmette-Guerin (BCG), chimeric antigen receptor T cell therapy (CAR-T), and natural killer cell therapy).
• Patients tested positive for hepatitis B and/or C surface antigen.
• High fever or any active or unresolved infection, including human immunodeficiency virus (HIV) positive.
• Autoimmune disease requiring therapy; immunodeficiency, or any disease process requiring immunosuppressive therapy.
• Prior clinical trial requiring patient to receive an investigational drug within two weeks of enrollment.
• Congestive heart failure, unstable angina or other underlying cardiac disease; history of thrombosis currently requiring anticoagulation.
• Mental or psychological illness preventing cooperation with treatment, efficacy evaluations, or unable to understand the informed consent process.
• Subjects who have undergone prior organ transplantation, including allogeneic stem-cell transplantation.
• Adult subjects who lack capacity to consent for themselves and for whom consent must be provided by a legally authorized representative.
• For SNK01+avelumab arm only: Subjects with prior hypersensitivity to avelumab or its excipients, including known severe hypersensitivity reactions to monoclonal antibodies (NCI CTCAE v4.03 Grade ≥ 3).
• For SNK01+avelumab arm only: Subjects with a significant immune-mediated adverse event due to a prior checkpoint inhibitor immunotherapy that led to permanent discontinuation of the therapy.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SEQUENTIAL

Arm && Interventions

Group	Intervention	Description
Cohort 1 - Low dose SNK01	SNK01	SNK01 (low dose) administered once a week for five weeks.
Cohort 2 - Medium dose SNK01	SNK01	SNK01 (medium dose) administered once a week for five weeks.
Cohort 3 - High dose SNK01	SNK01	SNK01 (high dose) administered once a week for five weeks.
Cohort 4 - SNK01 with avelumab	SNK01	SNK01 (high dose) administered in combination with avelumab once every two weeks (14-day cycle) for five cycles.
Cohort 4 - SNK01 with avelumab	Avelumab	SNK01 (high dose) administered in combination with avelumab once every two weeks (14-day cycle) for five cycles.
Cohort 4 - SNK01 with pembrolizumab	SNK01	SNK01 (high dose) administered in combination with pembrolizumab once every three weeks (21-day cycle) for five cycles.
Cohort 4 - SNK01 with pembrolizumab	Pembrolizumab	SNK01 (high dose) administered in combination with pembrolizumab once every three weeks (21-day cycle) for five cycles.

Primary Outcome Measures

Name	Time	Method
To assess the safety profile	Up to 6 months	Assessed by the incidence and severity of dose limiting toxicity (DLT) and other adverse events graded according to the National Cancer Institute's Common Toxicity Criteria for Adverse Events (NCI-CTCAE), Version 5.0, or the cytokine release syndrome revised grading system.

Secondary Outcome Measures

Name	Time	Method
To assess clinical objective response rate (ORR) of SNK01 in patients with refractory cancer	Up to 12 months	Objective response rate (ORR) is defined by the percentage of subjects who achieve a confirmed complete response (CR) or partial response (PR) per Response Evaluation Criteria in Solid Tumors (RECIST), Version 1.1.
To assess clinical objective response rate (ORR) of SNK01 in combination with avelumab in patients with refractory cancer	Up to 12 months	Objective response rate (ORR) is defined by the percentage of subjects who achieve a confirmed complete response (CR) or partial response (PR) per Response Evaluation Criteria in Solid Tumors (RECIST), Version 1.1.
To assess clinical objective response rate (ORR) of SNK01 in combination with pembrolizumab in patients with refractory cancer	Up to 12 months	Objective response rate (ORR) is defined by the percentage of subjects who achieve a confirmed complete response (CR) or partial response (PR) per Response Evaluation Criteria in Solid Tumors (RECIST), Version 1.1.

Trial Locations

Locations (1)

Sarcoma Oncology Research Center; 🇺🇸 Santa Monica, California, United States