A Study of SBT6050 Alone and in Combination With PD-1 Inhibitors in Subjects With Advanced HER2 Expressing Solid Tumors

June 27, 2022 updated by: Silverback Therapeutics

A Phase 1/1B, Open-Label, Dose Escalation and Expansion Study of SBT6050 Alone and in Combination With PD-1 Inhibitors in Subjects With Advanced Solid Tumors Expressing HER2

A first-in-human (FIH) study using SBT6050 and SBT6050 in combination with PD-1 inhibitors in HER2 expressing or amplified advanced malignancies

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Active, not recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

This study has 5 parts. Part 1 will evaluate the safety, tolerability, and activity of escalating doses of SBT6050 to estimate the maximum tolerated dose (MTD) and determine the dose recommended for Part 2. Part 2 of the study will further evaluate SBT6050 in select HER2 expressing or amplified advanced malignancies.

Part 3 will evaluate the safety, tolerability, and activity of escalating doses of SBT6050 in combination with pembrolizumab to estimate the MTD and determine the dose recommended for Part 4. Part 4 of the study will further evaluate SBT6050 in combination with pembrolizumab in select HER2 expressing or amplified advanced malignancies.

Part 5 of the study will evaluate the safety, tolerability, and activity of SBT6050 in combination with cemiplimab in select HER2 expressing or amplified advanced malignancies.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
58

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Australia
    • New South Wales
      • Sydney, New South Wales, Australia, 2109
        • Macquarie University Hospital Clinical Trials Unit
    • Victoria
      • Melbourne, Victoria, Australia, 3000
        • Peter MacCallum Cancer Centre
    • Western Australia
      • Nedlands, Western Australia, Australia, 6009
        • Breast Cancer Research Centre - WA
  • Korea, Republic of
      • Seoul, Korea, Republic of, 03080
        • Seoul National University Hospital
      • Seoul, Korea, Republic of, 05505
        • Asan Medical Center
      • Seoul, Korea, Republic of, 06351
        • Samsung Medical Center
  • United States
    • Massachusetts
      • Boston, Massachusetts, United States, 02114
        • Massachusetts General Hospital
    • North Carolina
      • Durham, North Carolina, United States, 27708
        • Duke University
    • Pennsylvania
      • Pittsburgh, Pennsylvania, United States, 15232
        • University of Pittsburgh Medical Center Hillman Cancer Center
    • Tennessee
      • Nashville, Tennessee, United States, 37203
        • Sarah Cannon Research Institute/Tennessee Oncology
    • Texas
      • Houston, Texas, United States, 77030
        • MD Anderson Cancer Center
      • San Antonio, Texas, United States, 78229
        • The START Center for Cancer Care

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

14 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Locally advanced or metastatic HER2-expressing (IHC 2+ or 3+) or amplified solid tumor
  • Subjects must have received prior therapies known to confer clinical benefit (unless ineligible or refused to receive)
  • Measurable disease per RECIST 1.1
  • Tumor lesion amenable for biopsy or able to provide tissue from biopsy within last 6 months
  • Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1
  • Adequate hematologic, hepatic, and cardiac function

Exclusion Criteria:

  • History of allergic reactions to certain components of SBT6050 or similar drugs
  • Untreated brain metastases
  • Active autoimmune disease or a documented history of autoimmune disease or syndrome
  • Human immunodeficiency virus infection, active hepatitis B infection or hepatitis C infection
  • Additional protocol defined inclusion/exclusion criteria may apply.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

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

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: SBT6050 Monotherapy
Escalating doses of SBT6050 in Part 1 followed by expansion in Part 2 at the recommended dose determined in Part 1.
Drug: SBT6050
Escalating doses of SBT6050 in Part 1 and recommended dose in Part 2
Experimental: SBT6050 and pembrolizumab
Escalating doses of SBT6050 in combination with pembrolizumab in Part 3 followed by expansion in Part 4 at the recommended dose determined in Part 3.
Drug: SBT6050
Escalating doses of SBT6050 in Part 1 and recommended dose in Part 2
Drug: pembrolizumab
400 mg IV
Experimental: SBT6050 and cemiplimab
SBT6050 in combination with cemiplimab in Part 5 at the recommended dose determined in Parts 1 and 3.
Drug: SBT6050
Escalating doses of SBT6050 in Part 1 and recommended dose in Part 2
Drug: Cemiplimab
350 mg IV

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
The proportion of subjects experiencing dose limiting toxicities
Time Frame: 28 days
Part 1 and 3 only
28 days
The incidence and severity of adverse events (AEs) and serious adverse events
Time Frame: 2 years
Parts 1, 2, 3, 4, and 5
2 years
Objective response rate, defined as confirmed Complete Response (CR) or Partial Response (PR)
Time Frame: 2 years
Parts 2, 4, and 5
2 years
Duration of response, defined as the time from date of first response (CR or PR)
Time Frame: 2 years
Parts 2, 4, and 5
2 years

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Objective response rate, defined as confirmed Complete Response (CR) or Partial Response (PR)
Time Frame: 2 years
Parts1 and 3 only
2 years
Duration of response, defined as the time from date of first response (CR or PR)
Time Frame: 2 years
Parts 1 and 3 only
2 years
Disease control rate, defined as CR, PR, or stable disease for at least 6 months
Time Frame: 2 years
Parts 1, 2, 3, 4, and 5
2 years
Estimates of selected pharmacokinetics (PK ) parameters for SBT6050
Time Frame: 2 years
Cmax: Parts 1, 2, 3, 4, and 5
2 years
Estimates of selected pharmacokinetics (PK ) parameters for SBT6050
Time Frame: 2 years
AUC: Parts 1, 2, 3, 4, and 5
2 years
Incidence of antidrug antibodies (ADA) to SBT6050
Time Frame: 2 years
Parts 1 and 2
2 years
Progression free survival
Time Frame: 2 years
Parts 2, 4, and 5
2 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Silverback Therapeutics

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Naomi Hunder, MD, Silverback Therapeutics

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
July 27, 2020

Primary Completion (Anticipated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 1, 2022

Study Completion (Anticipated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 1, 2022

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
June 29, 2020

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 6, 2020

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
July 7, 2020

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
June 30, 2022

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 27, 2022

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
June 1, 2022

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • SBT6050-101

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

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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