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CLDN6 CAR-T

Phase 1

Solid Tumor | Monoclonal antibody | Oncology |BioNTech SE|Last Updated: Jun 18, 2026

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment214

FDA Designations

No designations recorded

Clinical trial landscape

CLDN6 CAR-T · 1 trial · 1 indication

Phase 1 1
NCT04503278A Clinical Study of the Safety and Effectiveness of an Investigational Cell Therapy Given With and Without an Investigational RNA-based Vaccine in Patients With Organ TumorsSolid Tumor
ACTIVE NOT_RECRUITING214 Analytics
PHASE1ACTIVE NOT_RECRUITING
A Clinical Study of the Safety and Effectiveness of an Investigational Cell Therapy Given With and Without an Investigational RNA-based Vaccine in Patients With Organ Tumors
Solid TumorUnlock trial analytics

Study Endpoints

Primary Endpoints

Occurrence of treatment-emergent adverse events (TEAEs) including ≥ Grade 3, serious, fatal TEAEs by relationship
up to 25 months
Occurrence of dose reduction and discontinuation of investigational medicinal product (IMP) due to TEAEs
up to 25 months
Occurrence of dose-limiting toxicity (DLT) during the DLT evaluation period
Day 1 to day 28

Secondary Endpoints

Change from baseline in the levels and kinetics of soluble immune factors measured by cytokine multiplex assay
Baseline up to 25 months
Objective response rate
up to 25 months
Disease control rate
up to 25 months
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelFACTORIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Part 1 - CLDN6 CAR-TEXPERIMENTALDose escalation in lymphodepleted patients until the MTD and/or RP2D.
Part 2 Vaccine-modulated - CLDN6 uRNA-LPX/CLDN6 modRNA-LPXEXPERIMENTALDose escalation until the MTD and/or RP2D.

Interventions

NameTypeDescription
CLDN6 CAR-TBIOLOGICALadministered as an intravenous (i.v.) infusion.
CLDN6 uRNA-LPX/CLDN6 modRNA-LPXBIOLOGICALadministered as an i.v. injection at protocol-specified intervals.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites12

Inclusion Criteria: * Each patient enrolled in the trial must have CLDN6-positive tumor regardless of tumor histology defined as ≥ 50% of tumor cells expressing CLDN6 protein at an intensity of ≥2+ using a semi-quantitative immunohistochemistry assay in a central laboratory for specific detection o...

Countries:AustraliaGermanyNetherlandsSweden
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Competitive Landscape -Other Solid Tumors 9 trials (matched to "Solid Tumor")

Recent Changes (Last 90 Days)

MEDIUMJun 18, 2026NCT04503278Status: RECRUITING → ACTIVE_NOT_RECRUITING
MEDIUMJun 18, 2026NCT04503278Status: RECRUITING → ACTIVE_NOT_RECRUITING
MEDIUMJun 18, 2026NCT04503278Status: RECRUITING → ACTIVE_NOT_RECRUITING

Frequently asked questions about CLDN6 CAR-T

What is CLDN6 CAR-T used for?

CLDN6 CAR-T is an investigational cell therapy being studied for the treatment of solid tumors. It is currently in Phase 1 clinical development and has not been approved by regulatory authorities. The therapy is being evaluated in a clinical trial that also tests an investigational RNA-based vaccine, given with and without the vaccine, in patients with organ tumors.

What does CLDN6 CAR-T target?

CLDN6 CAR-T is a chimeric antigen receptor T-cell therapy designed to target CLDN6, a protein expressed on certain solid tumors. The therapy is being developed to direct a patient's own T cells to recognize and attack cancer cells that display this target. This mechanism is being investigated in a Phase 1 clinical trial.

Who makes CLDN6 CAR-T?

CLDN6 CAR-T is being developed by BioNTech SE, a biotechnology company traded on the NASDAQ under the ticker symbol BNTX. The company is conducting a Phase 1 clinical trial of the therapy in patients with solid tumors, with study sites in Australia, Germany, Netherlands, and Sweden.

What phase is CLDN6 CAR-T in?

CLDN6 CAR-T is in Phase 1 clinical development. It is an investigational therapy that has not been approved by the FDA or any other regulatory agency. The ongoing Phase 1 trial is active but not recruiting participants, and it is designed to evaluate the safety and effectiveness of the therapy in patients with solid tumors.

What clinical trials is CLDN6 CAR-T in?

CLDN6 CAR-T is being studied in one active Phase 1 clinical trial with the identifier NCT04503278. The trial is titled 'A Clinical Study of the Safety and Effectiveness of an Investigational Cell Therapy Given With and Without an Investigational RNA-based Vaccine in Patients With Organ Tumors' and has a planned enrollment of 214 participants.

Is CLDN6 CAR-T the same as a CAR-T cell therapy?

CLDN6 CAR-T is a type of chimeric antigen receptor T-cell therapy, commonly referred to as CAR-T. It is an investigational cell therapy being developed by BioNTech SE for solid tumors. The therapy is currently in Phase 1 clinical trials and is not yet approved for commercial use.