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No longer recruiting (closed or complete)Last updated: 3 April 2025

This phase I trial is trying to understand how a new immunotherapy works, if it is safe and how well it is tolerated when it is given alone or in combination with another immunotherapy drug, in patients with HER2 cancersA Phase 1/1B, Open-Label, Dose Escalation and Expansion Study of SBT6050 Alone and in Combination With Pembrolizumab in Subjects With Advanced Solid Tumors Expressing HER2

Trial purpose

Medical clipboardCancer treatment

Tumor type

Multi-Cancer Multi-Cancer

Age

People18+

Clinical summary

Summary

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 This study has 4 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 2. Part 4 of the study will further evaluate SBT6050 in combination with pembrolizumab in select HER2 expressing or amplified advanced malignancies

Conditions

This trial is treating people with HER2 positive cancers

Eligibility

Inclusion

  • 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

  • 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.

Inclusion

  • Your cancer has spread to other parts of the body (metastatic) or has grown into nearby parts of the body (locally advanced).

Exclusion

  • You have certain types of non-cancer medical conditions.
  • You have had certain treatments, surgical procedures or drugs.
Message

Clinical trials have complex eligibility criteria, and other criteria may apply for this trial. Ask your doctor about whether this trial could be right for you.

Participating hospitals

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No longer recruiting (closed or complete) hospitals

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Trial Identifiers

Information on this page is partially produced from ClinicalTrials.gov *. View further details about this trial on the registry via the links below:

Trial sponsor

Silverback Therapeutics

Scientific Title

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

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