A Safety and Activity Study of SBT6050 in Combination With Other HER2-directed Therapies for HER2-positive Cancers

NCT ID: NCT05091528

Last Updated: 2022-08-18

Study Results

Results available

Outcome measurements, participant flow, baseline characteristics, and adverse events have been published for this study.

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Basic Information

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Recruitment Status

TERMINATED

Clinical Phase

PHASE1/PHASE2

Total Enrollment

2 participants

Study Classification

INTERVENTIONAL

Study Start Date

2022-02-08

Study Completion Date

2022-07-07

Brief Summary

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This study is designed to assess the safety and preliminary activity of SBT6050 in combination with trastuzumab deruxtecan (Part 1) or tucatinib plus trastuzumab +/- capecitabine (Part 2). Participants will be enrolled into each Arm based on cancer diagnosis and prior therapies.

Detailed Description

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Conditions

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HER2-positive Breast Cancer HER2-positive Gastric Cancer HER2-positive Colorectal Cancer HER2-expressing Non-small Cell Lung Cancer

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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SBT6050 + T-DXd (5.4 mg/kg)

SBT6050 plus trastuzumab deruxtecan

Group Type EXPERIMENTAL

SBT6050

Intervention Type DRUG

Dose range of 0.45 to 0.6 mg/kg by subcutaneous (SC) injection in 21-day cycles

trastuzumab deruxtecan

Intervention Type DRUG

5.4 mg/kg by intravenous (IV) infusion in 21-day cycles

SBT6050 + T-DXd (6.4 mg/kg)

SBT6050 plus trastuzumab deruxtecan

Group Type EXPERIMENTAL

SBT6050

Intervention Type DRUG

Dose range of 0.45 to 0.6 mg/kg by subcutaneous (SC) injection in 21-day cycles

trastuzumab deruxtecan

Intervention Type DRUG

6.4 mg/kg by IV infusion in 21-day cycles

SBT6050 + Tucatinib + Trastuzumab + Capecitabine

SBT6050 plus tucatinib, trastuzumab, and capecitabine

Group Type EXPERIMENTAL

SBT6050

Intervention Type DRUG

Dose range of 0.45 to 0.6 mg/kg by subcutaneous (SC) injection in 21-day cycles

tucatinib

Intervention Type DRUG

300 mg by mouth (PO) twice daily (BID)

trastuzumab

Intervention Type DRUG

8 mg/kg loading dose (first dose), then 6 mg/kg maintenance dose (subsequent doses) IV infusion in 21-day cycles

capecitabine

Intervention Type DRUG

1000 mg/m2 PO BID for 14 days of each 21-day cycle

SBT6050 + Tucatinib + Trastuzumab

SBT6050 plus tucatinib and trastuzumab

Group Type EXPERIMENTAL

SBT6050

Intervention Type DRUG

Dose range of 0.45 to 0.6 mg/kg by subcutaneous (SC) injection in 21-day cycles

tucatinib

Intervention Type DRUG

300 mg by mouth (PO) twice daily (BID)

trastuzumab

Intervention Type DRUG

8 mg/kg loading dose (first dose), then 6 mg/kg maintenance dose (subsequent doses) IV infusion in 21-day cycles

Interventions

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SBT6050

Dose range of 0.45 to 0.6 mg/kg by subcutaneous (SC) injection in 21-day cycles

Intervention Type DRUG

trastuzumab deruxtecan

5.4 mg/kg by intravenous (IV) infusion in 21-day cycles

Intervention Type DRUG

tucatinib

300 mg by mouth (PO) twice daily (BID)

Intervention Type DRUG

trastuzumab

8 mg/kg loading dose (first dose), then 6 mg/kg maintenance dose (subsequent doses) IV infusion in 21-day cycles

Intervention Type DRUG

capecitabine

1000 mg/m2 PO BID for 14 days of each 21-day cycle

Intervention Type DRUG

trastuzumab deruxtecan

6.4 mg/kg by IV infusion in 21-day cycles

Intervention Type DRUG

Other Intervention Names

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ENHERTU TUKYSA HERCEPTIN XELODA ENHERTU

Eligibility Criteria

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Inclusion Criteria

* Advanced or metastatic HER2-expressing (IHC 2+ or 3+) or HER2-amplified solid tumors
* Measurable disease per the the Response Evaluation Criteria in Solid Tumors (RECIST) Version 1.1 criteria
* Tumor lesion amenable for biopsy or able to submit an adequate recent archived tumor tissue for baseline testing, as follows:

1. Breast cancer and colorectal cancer (CRC): archival biopsy tissue obtained after the last HER2-directed therapy (excluding trastuzumab and pertuzumab), or a fresh biopsy
2. Gastric cancer and non-small-cell lung cancer (NSCLC): archival biopsy tissue taken within the past 12 months and after completion of last HER2-directed therapy, or a fresh biopsy
* ECOG Performance Status of 0 or 1
* Adequate hematologic, hepatic, renal, and cardiac function

Exclusion Criteria

* History of allergic reactions to certain components of study treatment therapies
* Untreated brain metastases
* Currently active (or history of) autoimmune disease
* Taking the equivalent of \>10 mg / day of prednisone
* Taking a medication that moderately induces CYP2C, strongly inhibits CYP2C8, or interacts with both enzymes (CYP3A and CYP2C8)
* Uncontrolled or clinically significant interstitial lung disease (ILD) / pneumonitis that requires systemic corticosteroid treatment or suspected ILD / pneumonitis
* HIV infection, active hepatitis B or hepatitis C infection
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Silverback Therapeutics

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Naomi Hunder, MD

Role: STUDY_DIRECTOR

Silverback Therapeutics, Inc.

Locations

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Massachusetts General Hospital

Boston, Massachusetts, United States

Site Status

Countries

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United States

Provided Documents

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Document Type: Study Protocol and Statistical Analysis Plan

View Document

Other Identifiers

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SBT6050-201

Identifier Type: -

Identifier Source: org_study_id

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