A Study of DSP107 Alone and in Combination with Atezolizumab for Patients with Advanced Solid Tumors

A First-in-Human, Two-Part, Open-Label, Phase I/II Study of DSP107 in Subjects with Advanced Solid Tumors Including a Dose-escalation Safety Study (part 1) and Preliminary Efficacy Assessment of DSP107 As Monotherapy and in Combination with Atezolizumab (part 2)

Part 1: A first-in-human, open-label, Phase I dose escalation study of DSP107 monotherapy and combination therapy with atezolizumab in patients with advanced solid tumors.

Part 2: Preliminary efficacy assessment of DSP107 in combination with atezolizumab in second or third line treatment of non small cell lung cancer. Preliminary efficacy assessment of DSP107 as a single agent or in combination with atezolizumab in third line treatment of colorectal cancer.

Study Overview

• Status: Active, not recruiting
• Conditions: Colorectal Cancer; Non Small Cell Lung Cancer; Advanced Solid Tumor
• Intervention / Treatment: Biological: DSP107; Biological: Atezolizumab

Detailed Description

This study will be the first time that DSP107 is administered to human subjects. The aim of the study is to evaluate the safety, pharmacokinetics (PK), pharmacodynamics (PD) and preliminary efficacy of DSP107 monotherapy and combination therapy in a two-part design.

Part 1 will involve DSP107 monotherapy dose escalation in subjects with advanced solid tumors that are not amenable to surgical resection or other approved therapeutic options that have demonstrated clinical benefit. Additional dose finding cohorts will be enrolled to establish a safe dose of DSP107 when given in combination with atezolizumab.

Part 2 will comprise two expansion cohorts:

A) Expansion cohort A consisting of one treatment arm in which subjects will be treated with DSP107 in combination with atezolizumab. This expansion cohort will enroll subjects with non small cell lung cancer who have progressed following no more than 2 lines of prior systemic treatment including treatment with PD-1 or PD-L1 targeting agents.

B) Expansion cohort B consisting of two treatment arms in which subjects will be treated either with DSP107 monotherapy or DSP107 in combination with atezolizumab. This expansion cohort will enroll subjects with colorectal cancer who have progressed following two previous lines of therapy.

• Study Type: Interventional
• Enrollment (Estimated): 125
• Phase: Phase 2; Phase 1

Contacts and Locations

Study Locations

• United States
  • California
    • La Jolla, California, United States, 92093
      • Moores Cancer Center, UCSD
  • Colorado
    • Aurora, Colorado, United States, 80045
      • University of Colorado Hospital, Anschutz Cancer Pavilion (ACP)
  • Florida
    • Lake Mary, Florida, United States, 32746
      • Florida Cancer Specialists
  • Indiana
    • Indianapolis, Indiana, United States, 46202
      • Indiana University Simon Cancer Center
  • Kansas
    • Kansas City, Kansas, United States, 66204
      • KUCC / KUMCRI University of Kansas Cancer Center
  • Pennsylvania
    • Philadelphia, Pennsylvania, United States, 19107
      • SKCC-Sidney Kimmel Cancer Center Thomas Jefferson University
    • Pittsburgh, Pennsylvania, United States, 15232
      • UPMC Hillman Cancer Center University of Pittsburgh

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 or 1
• Subject must have measurable disease per RECIST version 1.1

• Part 1:

  o Histologically confirmed advanced solid tumor that is not amenable to surgical resection or other approved therapeutic options that have demonstrated clinical benefit or subject is intolerant or has refused available therapies

• Part 2, Expansion Cohort A:

  • Histologically confirmed, inoperable non-small cell lung cancer (Stage 3b or Stage 4). Squamous and non-squamous histologies are both acceptable
  • Wildtype for actionable oncogenic driver mutations (e.g., ALK, EGFR, ROS1, RET, NTRK). Driver mutations for KRAS, BRAF and c-METex14skip will be allowed.
  • Received no more than 2 lines of prior systemic treatment, including anti PD-1 or anti PD-L1 therapeutic agent ± chemotherapy. Targeted therapies for KRAS, BRAF and c-METex14skip will not be counted towards the previous lines of therapy.

• Part 2, Expansion Cohort B:

  • Histologically confirmed, inoperable microsatellite stable colorectal carcinoma (Stage 3b or Stage 4)
  • Received two previous lines of therapy including standard chemotherapy and/or targeted antibodies

Exclusion Criteria:

• Life expectancy of ≤ 3 months
• Central nervous system (CNS) metastases
• Life-threatening (grade 4) immune-mediated adverse event related to prior immunotherapy
• Immune-mediated adverse reaction that required discontinuation of prior immunotherapy
• Past or current history of autoimmune disease or immune deficiency
• History of autoimmune hemolytic anemia or autoimmune thrombocytopenia
• History of hematological malignancy
• History of organ or stem cell transplantation
• Clinically significant liver disease, including alcoholic hepatitis, cirrhosis, fatty liver disease and inherited liver disease
• Previously treatment with CAR-T cells
• Treatment with systemic immunosuppressive medication within 2 weeks prior to first dose of study treatment
• Received live, attenuated vaccine within 4 weeks prior to first dose of study treatment
• Treatment with systemic immunostimulatory agents within 4 weeks prior to first dose of study treatment
• Treatment with atezolizumab, any CD47/SIRPα targeting agent or immune agonists (e.g., anti-CD137, anti-CD40, anti-OX40)
• Known allergy or hypersensitivity to any of the test compounds, materials or contraindication to test product
• Clinically significant abnormal laboratory safety tests
• Detection of anti DSP107 antibodies at screening
• History of HIV infection or active Hepatitis B or C infection
• Pregnant or breast feeding or planning to become pregnant while enrolled in the study
• History or evidence of any other clinically unstable/uncontrolled disorder, condition, or disease

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Sequential Assignment
• Masking: None (Open Label)

Number of Arms

5

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: DSP107 monotherapy in advanced solid tumors; DSP107 will be administered by intravenous infusion over 1 hour on Days 1, 8 and 15 of each 21-day cycle for up to 12 treatment cycles. Starting dose will be 0.01 mg/kg and maximum dose will not exceed 10 mg/kg.	Biological: DSP107; DSP107 (SIRPα - 4-1BBL) is a bi-functional, trimeric, fusion protein.
Experimental: DSP107 in combination with atezolizumab in advanced solid tumors; DSP107 will be administered by IV infusion over 1 hour on Days 1, 8 and 15 of each 21-day cycle. Subjects will receive atezolizumab 1200 mg by intravenous infusion over 30 mins (first infusion over 1 hour) on Day 1 of every treatment cycle. DSP107 infusion will commence 1 hour following completion of atezolizumab infusion. The study will include up to 12 treatment cycles.	Biological: DSP107; DSP107 (SIRPα - 4-1BBL) is a bi-functional, trimeric, fusion protein.; Biological: Atezolizumab; Atezolizumab is a humanized IgG1 monoclonal antibody that targets PD-L1
Experimental: DSP107 in combination with atezolizumab in non-small cell lung cancer; DSP107 10mg/kg will be administered by IV infusion over 1 hour on Days 1, 8 and 15 of each 21-day cycle. Subjects will receive atezolizumab 1200 mg by intravenous infusion over 30 mins (first infusion over 1 hour) on Day 1 of every treatment cycle. DSP107 infusion will commence 1 hour following completion of atezolizumab infusion. The study will include up to 12 treatment cycles.	Biological: DSP107; DSP107 (SIRPα - 4-1BBL) is a bi-functional, trimeric, fusion protein.; Biological: Atezolizumab; Atezolizumab is a humanized IgG1 monoclonal antibody that targets PD-L1
Experimental: DSP107 monotherapy in colorectal cancer; DSP107 10mg/kg will be administered by intravenous infusion over 1 hour on Days 1, 8 and 15 of each 21-day cycle for up to 12 treatment cycles..	Biological: DSP107; DSP107 (SIRPα - 4-1BBL) is a bi-functional, trimeric, fusion protein.
Experimental: DSP107 in combination with atezolizumab in colorectal cancer; DSP107 10mg/kg will be administered by IV infusion over 1 hour on Days 1, 8 and 15 of each 21-day cycle. Subjects will receive atezolizumab 1200 mg by intravenous infusion over 30 mins (first infusion over 1 hour) on Day 1 of every treatment cycle. DSP107 infusion will commence 1 hour following completion of atezolizumab infusion. The study will include up to 12 treatment cycles.	Biological: DSP107; DSP107 (SIRPα - 4-1BBL) is a bi-functional, trimeric, fusion protein.; Biological: Atezolizumab; Atezolizumab is a humanized IgG1 monoclonal antibody that targets PD-L1

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Adverse Events (AEs)	An AE is any untoward medical occurrence in a patient or clinical investigation subject administered a pharmaceutical product and which does not necessarily have a causal relationship with this treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with the use of a medicinal (investigational) product, whether or not related to the medicinal (investigational) product.	Duration of the study, estimated to be 9 months
Dose Limiting Toxicities (DLT)	A DLT is defined as a clinically significant AE of laboratory abnormality that is related to DSP107 or the combination of DSP107 and atezolizumab, but is unrelated to disease progression, intercurrent illness or concomitant medications	At the end of Treatment Cycle 1 (each cycle is 21 days)
DSP107 Serum Concentration	Serum samples will be collected to determine circulating levels and PK profile of DSP107	At the end of Treatment Cycle 8 (each cycle is 21 days)

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
DSP107 Effect on Phenotypic and Activation Profiles of Peripheral Blood Mononuclear Cells	Blood samples will be collected and examined by flow cytometry to determine the effect of DSP107 on different T-cells, B-cells, NK cells and monocytes, and their expression of activation markers.	At the end of Treatment Cycle 8 (each cycle is 21 days)
DSP107 and atezolizumab anti-drug antibody (ADA) formation	Serum samples will be collected throughout the study for assessment of ADA formation using validated assay.	Duration of the study, estimated to be 9 months
Preliminary Efficacy (Part 2 only)	Patients will undergo computed tomography (CT) scans to allow assessment of tumor response according to RECIST criteria	Duration of the study, estimated to be 12 months

Collaborators and Investigators

• Sponsor: Kahr Medical
• Investigators: Principal Investigator: Jason Luke, MD, University of Pittsburgh; Principal Investigator: Anwaar Saeed, MD, University of Pittsburgh; Principal Investigator: Jun Zhang, MD, KUMC

Study record dates

Study Major Dates

• Study Start (Actual): October 7, 2020
• Primary Completion (Estimated): September 1, 2025
• Study Completion (Estimated): September 1, 2025

Study Registration Dates

• First Submitted: June 16, 2020
• First Submitted That Met QC Criteria: June 17, 2020
• First Posted (Actual): June 22, 2020

Study Record Updates

• Last Update Posted (Actual): March 25, 2025
• Last Update Submitted That Met QC Criteria: January 7, 2025
• Last Verified: January 1, 2025

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Neoplasms by Site; Neoplasms; Respiratory Tract Diseases; Lung Diseases; Respiratory Tract Neoplasms; Thoracic Neoplasms; Lung Neoplasms; Carcinoma, Bronchogenic; Bronchial Neoplasms; Carcinoma, Non-Small-Cell Lung; Antineoplastic Agents, Immunological; Immune Checkpoint Inhibitors; Antineoplastic Agents; Molecular Mechanisms of Pharmacological Action; Atezolizumab
• Other Study ID Numbers: DSP107_001

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No