Chimeric Receptor T Cells With Trastuzumab in HER2+ Advanced Breast Cancer and Other Solid Tumors

NCT ID: NCT06027983

Last Updated: 2025-09-23

Basic Information

• Recruitment Status: NOT_YET_RECRUITING
• Clinical Phase: PHASE1/PHASE2
• Total Enrollment: 36 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2026-11-01
• Study Completion Date: 2027-12-31

Brief Summary

This phase Ib study aims to assess the safety and feasibility of combination of chimeric receptor T cells with trastuzumab in patients with HER2+ solid tumors, with further expansion of study population in HER2+ metastatic breast cancer once safety has been established.

Detailed Description

Hypothesis

Investigators hypothesize that trastuzumab-mediated cytotoxicity will be augmented by the infusion of autologous chimeric receptor T-cells.

Primary Objectives

1. To determine the safety of autologous chimeric receptor T-cells in patients with HER2+ advanced solid tumors

2. To determine the clinical benefit rate (CBR) of autologous chimeric receptor T-cells in patients with HER2+ advanced breast cancer

Secondary Objectives

1. To determine the expansion and persistence of autologous chimeric receptor T-cells after a single infusion in patients with advanced solid tumors

2. To determine anti-tumor efficacy in terms of objective response rate (ORR) and progression-free survival (PFS) of autologous chimeric receptor T-cells in patients with HER2+ advanced breast cancer

Conditions

HER2+ Advanced Breast Cancer; Other Solid Tumors

Study Design

• Allocation Method: NA
• Intervention Model: SEQUENTIAL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Chimeric Receptor T-cells

Eligible patients will undergo apheresis prior to cycle 1 therapy. Treatment comprises of trastuzumab followed by chimeric receptor T-cells in cycle 1.

During Cycle 2 onwards till disease progression, patients will receive IV or SC trastuzumab only, every 3 weeks.

Group Type: EXPERIMENTAL

Chimeric receptor T-cells + Trastuzumab

Intervention Type: DRUG

Chimeric receptor T-cells will be administered by infusion. Trastuzumab will be administered intravenously.

Fludarabine and Cyclophosphosphamide

Intervention Type: DRUG

3-day chemotherapy regimen of fludarabine and cyclophosphamide for lymphodepletion

Interventions

Chimeric receptor T-cells + Trastuzumab

Chimeric receptor T-cells will be administered by infusion. Trastuzumab will be administered intravenously.

Intervention Type: DRUG

Fludarabine and Cyclophosphosphamide

3-day chemotherapy regimen of fludarabine and cyclophosphamide for lymphodepletion

Intervention Type: DRUG

Other Intervention Names

Lymphodepletion

Eligibility Criteria

Inclusion Criteria

Patients may be included in the study only if they meet all of the following criteria:

• Age ≥ 21 years.
• Histologically confirmed diagnosis of HER2-positive cancer defined by immunohistochemistry (IHC) to be HER2 IHC3+ or HER2 IHC2+ and FISH positive. If immunohistochemistry is not available, FISH method is acceptable. The HER2 positivities by FISH is determined as FISH amplification ratio positive by institutional guidelines. Tumor subtype for each phase include :
• Phase I: HER2-positive breast or gastric cancer or other treatment-refractory HER2-positive solid tumors
• Phase II : HER2-positive breast carcinoma
• Eastern Cooperative Oncology Group (ECOG) performance status 0-1.
• Has measurable or evaluable disease based on RECIST 1.1 criteria
• Estimated life expectancy of at least 12 weeks.
• Prior lines of therapy:
• HER2-positive breast cancer - patient must have failed at least two lines of anti-HER2 based therapy for advanced/metastatic cancer. Patients with documented relapse while receiving or within 6 months of completion of adjuvant or neoadjuvant trastuzumab for HER2-positive breast cancer will be considered as 1 prior line of therapy.
• HER2-positive gastric cancer - patient must have failed at least one line of anti-HER2 based therapy.
• Other refractory HER2-positive solid tumors (non-breast, non-gastric) - have no standard therapies or have failed or unable to tolerate standard therapies
• Has recovered from acute toxicities from prior anti-cancer therapies
• Left ventricular ejection fraction ≥50%
• Adequate organ function including the following:

o Bone marrow: Absolute neutrophil (segmented and bands) count (ANC) ≥ 1.5 x 109/L Platelets ≥ 100 x 109/L Haemoglobin ≥ 8 x 109/L

o Hepatic: Bilirubin ≤ 1.5 x upper limit of normal (ULN), ALT or AST≤ 2.5x ULN, (or ≤5 X with liver metastases)

o Renal: Creatinine ≤ 1.5x ULN

• Signed informed consent from patient or legal representative.
• Able to comply with study-related procedures.
• Specific to cohorts 3, 4 and 5 : Patients who have a history of VTE are eligible if as long as they are receiving therapeutic/prophylactic doses of anticoagulation.

Exclusion Criteria

Patients will be excluded from the study for any of the following reasons:

• Treatment within the last 30 days with any investigational drug.
• Concurrent administration of any other tumour therapy, including cytotoxic chemotherapy, hormonal therapy, and immunotherapy.
• Major surgery within 28 days of study drug administration.
• Active infection that in the opinion of the investigator would compromise the patient's ability to tolerate therapy.
• Pregnancy.
• Breast feeding.
• Serious concomitant disorders that would compromise the safety of the patient or compromise the patient's ability to complete the study, at the discretion of the investigator.
• Active bleeding disorder or bleeding site.
• Non-healing wound.
• Poorly controlled diabetes mellitus.
• Second primary malignancy that is clinically detectable at the time of consideration for study enrolment.
• Symptomatic brain metastasis.
• History of significant neurological or mental disorder, including seizures or dementia,
• History of autoimmune disease or use of gamma immunoglobulin
• Unable to comply with study procedures

• Minimum Eligible Age: 21 Years
• Maximum Eligible Age: 99 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

National University Hospital, Singapore

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Soo Chin Lee

Role: PRINCIPAL_INVESTIGATOR

National University Hospital, Singapore

Central Contacts

Soo Chin Lee

Role: CONTACT

soo_chin_lee@nuhs.edu.sg

+65 6908 2222

References

Lee SC, Shimasaki N, Lim JSJ, Wong A, Yadav K, Yong WP, Tan LK, Koh LP, Poon MLM, Tan SH, Ow SGW, Bharwani L, Yap YS, Foo MZQ, Coustan-Smith E, Sundar R, Tan HL, Chong WQ, Kumarakulasinghe NB, Lieow JLM, Koe PJX, Goh BC, Campana D. Phase I Trial of Expanded, Activated Autologous NK-cell Infusions with Trastuzumab in Patients with HER2-positive Cancers. Clin Cancer Res. 2020 Sep 1;26(17):4494-4502. doi: 10.1158/1078-0432.CCR-20-0768. Epub 2020 Jun 10.

Reference Type: BACKGROUND

PMID: 32522887 (View on PubMed)

Other Identifiers

ACEHER2

Identifier Type: -

Identifier Source: org_study_id