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BNT211

Phase 1

Solid Tumor | CAR-T | Oncology |BioNTech SE|Trials Updated: Jun 18, 2026

BNT211 target and mechanism

Molecular targetCLDN6
Target classProtein
ModalityCAR-T

Also known as CLDN6 CAR-T

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment214

FDA Designations

No designations recorded

BNT211 clinical trials

BNT211 · 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 10 trials (matched to "Solid Tumor")

Frequently asked questions about BNT211

What is BNT211 used for?

BNT211 is an investigational cell therapy being studied in adults with solid tumors. It is being developed for oncology indications and is not yet approved for any use. The Phase 1 study enrolls patients 18 years and older with organ tumors.

What does BNT211 target?

BNT211 targets CLDN6, a protein expressed on certain solid tumors. The therapy is a CAR-T product directed at CLDN6, and the trial also evaluates it given with and without an investigational RNA-based vaccine that targets the same protein.

Who is developing BNT211?

BNT211 is being developed by BioNTech SE, which trades on Nasdaq under the ticker BNTX. BioNTech is the sponsor of the Phase 1 clinical study evaluating the therapy in patients with solid tumors.

What phase is BNT211 in?

BNT211 is in Phase 1 clinical development. It is investigational and has not been approved by the FDA or any other regulatory agency. The single Phase 1 trial is currently active and not recruiting, with a planned enrollment of 214 patients.

What clinical trials is BNT211 in?

BNT211 is being evaluated in one clinical trial, NCT04503278, titled a 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. The trial is active but not recruiting and is conducted in Australia, Germany, the Netherlands, and Sweden.

Is BNT211 the same as CLDN6 CAR-T?

Yes, BNT211 is also known as CLDN6 CAR-T and as CLDN6 uRNA-LPX/CLDN6 modRNA-LPX. These names refer to the same BioNTech investigational therapy, which combines a CLDN6-directed CAR-T cell product with an RNA-based vaccine component.