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SuspendedNCT04650451Updated Apr 20, 2023

Safety and Activity Study of HER2-Targeted Dual Switch CAR-T Cells (BPX-603) in Subjects With HER2-Positive Solid Tumors

A Phase 1 interventional study of chimeric antigen receptor (CAR) T cell therapy in HER-2 Gene Amplification, HER2-positive Gastric Cancer and HER2-positive Breast Cancer, sponsored by Bellicum Pharmaceuticals. Suspended at 7 sites in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2023-04-20.

Sponsored by Bellicum Pharmaceuticals · Phase 1, Interventional, and Treatment

Why this study was suspended
Due to a Dose Limiting Toxicity in another sister trial with same technology.
Phase
Phase 1
Study type
Interventional
Enrollment
220
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Study summary

This is a Phase 1/2, open-label, multicenter, non-randomized study to investigate the safety, tolerability, and clinical activity of HER2-specific dual-switch CAR-T cells, BPX-603, administered with rimiducid to subjects with previously treated, locally advanced or metastatic solid tumors which are HER2 amplified/overexpressed.

Read the detailed description
  • Phase 1: Cell dose escalation to identify the maximum dose of BPX-603 administered without or with rimiducid. The first subject in each dose cohort will receive BPX-603 alone (without rimiducid) in order to assess safety of the CAR-T monotherapy.
  • Phase 2: Indication-specific dose expansion to assess the safety, pharmacodynamics (including BPX-603 persistence and response to temsirolimus as applicable), and clinical activity at the recommended dose for expansion (RDE) identified in Phase 1 in various HER2+ solid tumors.
  • During Phase 1 or 2, temsirolimus (single IV dose at 25 mg) may be administered following BPX-603 infusion in response to treatment-emergent toxicity in order to activate the iRC9 safety switch.
02

Conditions studied

  • HER-2 Gene Amplification
  • HER2-positive Gastric Cancer
  • HER2-positive Breast Cancer
  • HER-2 Protein Overexpression
  • Solid Tumor, Adult

Keywords

  • HER2
  • CAR-T
  • breast cancer
  • solid tumors
  • gastric cancer
03

In context

Breast Neoplasms

14,825 studies on the registry are indexed under Breast Neoplasms; 3,319 are open to participants now.

This study's planned enrollment of 220 is above the median of 72 across 10,896 interventional studies indexed under Breast Neoplasms.

Browse Breast Neoplasms studies →

Lead sponsor

Bellicum Pharmaceuticals is the lead sponsor of 15 studies on the registry; none are open to participants now.

Of its 7 completed or terminated interventional studies of FDA-regulated products, 5 (71%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Documented evidence of amplification/overexpression by local testing.
  • or cytologically confirmed diagnosis of a locally advanced unresectable or HER2+ solid tumor for which standard treatment is no longer effective, does not exist, or subject is ineligible.
  • Subjects with a solid tumor malignancy for which HER2-targeted therapy is approved as a standard treatment (e.g., breast, gastric cancers) must have received prior treatment with approved HER2-directed therapy.
  • (at least one target lesion) per v1.1.
  • > 12 weeks.
  • 0-1.
  • Adequate organ function.

Exclusion criteria

Exclusion Criteria:

  • Symptomatic, untreated, or actively progressing central nervous system .
  • Prior CAR T cell or other genetically-modified T cell therapy.
  • Impaired cardiac function or cardiac disease.
  • Symptomatic intrinsic lung disease or those with extensive tumor involvement of the lungs.
  • Severe intercurrent infection.
  • Pregnant or breastfeeding.
  • Known positivity.
Terms in these criteria, in plain language(10)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

HER2

HER2 is a protein, made from the ERBB2 gene, that drives the growth of some cancers. A study may look for a level of the protein, extra copies of the gene, or a particular change in it.

In breast cancer, protein tests are read as HER2-positive, HER2-low or HER2-negative; other cancers use their own rules. Check which test result the study requires.

Histologically or cytologically confirmed

The diagnosis was confirmed by looking at a sample under a microscope: tissue from a biopsy or surgery (histology), or cells from a fluid or needle sample (cytology).

Your pathology report is the document that shows this.

Metastases

Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

Measurable disease

The amount of disease can be tracked with a defined measurement, so the study can see whether it shrinks or grows. It might be a tumour measured on a scan or, in some blood cancers such as myeloma, a marker measured in blood or urine.

The criteria or the study team say which measurement counts — having no tumour visible on a scan does not by itself rule you out.

RECIST

The standard rules for measuring tumours on CT or MRI scans, to tell whether a cancer is shrinking, stable or growing during treatment.

“Measurable disease per RECIST 1.1” usually means at least one tumour 10 mm or more at its longest on a CT scan, or a lymph node 15 mm or more across its short axis.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
220 participants (estimated)

Study arms

  • Experimental
    HER2-targeted dual-switch CAR-T cells

    Subjects will receive one dose of BPX-603 on Day 1, followed by rimiducid IV infusion weekly (as tolerated) starting on Day 8 and continued until treatment discontinuation criteria are met.

    Biological: chimeric antigen receptor (CAR) T cell therapy

Interventions

  • Biologicalchimeric antigen receptor (CAR) T cell therapy

    HER2-targeted dual-switch CAR-T cells

    Also known as: CAR-T, BPX-603, autologous CAR-T

06

What researchers measure

Primary outcomes

  1. Proportion of subjects experiencing Dose Limiting Toxicities at increasing doses of BPX-603

    Dose limiting toxicities are defined as BPX-603-related adverse events.

    Time frame: 35 days from time of BPX-603 infusion

  2. Maximum tolerated dose (MTD) and/or recommended dose for expansion (RDE)

    Identify the optimal dose of BPX-603 for Phase 2.

    Time frame: through Phase 1 completion, up to 2 years

Secondary outcomes

  1. Persistence of HER2-CAR T cells (cell counts)

    The persistence over time of BPX-603 CAR T cells in the peripheral blood as determined by flow cytometry (% CAR+ cells).

    Time frame: measured over time from baseline through study completion, up to 5 years

  2. Expansion of HER2-CAR T cells (vector copy number)

    The expansion over time of BPX-603 CAR T cells in the peripheral blood as determined by qPCR (copies/ug gDNA).

    Time frame: measured over time from baseline through study completion, up to 5 years

  3. Antitumor activity of BPX-603

    Overall response rate

    Time frame: through study completion, up to 5 years

07

Study locations

7 sites
  • City of Hope National Medical Center
    Duarte, California 91010, United States
  • University of California San Diego (UCSD)
    La Jolla, California 92093, United States
  • Winship Cancer Institute at Emory University
    Atlanta, Georgia 322972, United States
  • University of Chicago
    Chicago, Illinois 60637, United States
  • John Theurer Cancer Center, Hackensack University Medical Center
    Hackensack, New Jersey 07601, United States
  • Roswell Park Cancer Institute
    Buffalo, New York 14263, United States
  • The University of Texas MD Anderson Cancer Center
    Houston, Texas 77030, United States
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 20, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT04650451
Lead sponsor
Bellicum Pharmaceuticals
Responsible party
Sponsor
First posted
Dec 2, 2020
Start date
Dec 7, 2020
Primary completion
Dec 31, 2025 (estimated)
Completion
Jan 2, 2027 (estimated)
Last update
Apr 20, 2023

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is suspended, as verified in Apr 2023. You cannot join it, but the record below documents what was studied.

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