Safety, Pharmacokinetics, Pharmacodynamics, and Preliminary Efficacy Trial of BNT141 in Patients With Unresectable or Metastatic CLDN18.2-positive Gastric, Pancreatic, Ovarian and Biliary Tract Tumors
TerminatedPhase 1, PHASE2Results postedLast updated 2 October 2024
What this trial tests
Phase 1, PHASE2 trial testing BNT141 in Solid Tumor in 13 participants. Terminated before completion.
18 and older, any sex, with Solid Tumor or Gastric Cancer. Patients with the condition only — healthy volunteers not accepted.
Results — posted to ClinicalTrials.gov
Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.
Occurrence of Treatment-emergent Adverse Events (TEAEs) Within a Patient Including Grade ≥ 3, Serious, Fatal TEAE by RelationshipPrimary· From start of BNT141 treatment until the second Safety Follow-up Visit (60 ± 7 days after last dose), up to 30 weeks.
All TEAEs are included, i.e., AEs with an onset date on or after the first dose of BNT141 (if the AE was absent before the first dose) or worsened after the first dose of BNT141 (if the AE was present before the first dose). AEs with an onset date \>60 days after the last dose of BNT141 are included only if assessed as related to BNT141 by the investigator.
Intensity of AEs was graded according to the NCI CTCAE v5.0, i.e.,:
Grade 1 - Mild, Grade 2 - Moderate, Grade 3 - Severe, Grade 4 - Life-threatening consequences; urgent urgent intervention indicated, Grade 5 - Death related to AE
Any TEAE
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
3
BNT141 Monotherapy - 0.30 mg/kg
3
BNT141 Monotherapy - 0.45 mg/kg
4
BNT141 Monotherapy - 0.60 mg/kg
3
Related TEAE
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
3
BNT141 Monotherapy - 0.30 mg/kg
3
BNT141 Monotherapy - 0.45 mg/kg
4
BNT141 Monotherapy - 0.60 mg/kg
3
Grade ≥3 TEAE
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
0
BNT141 Monotherapy - 0.30 mg/kg
2
BNT141 Monotherapy - 0.45 mg/kg
2
BNT141 Monotherapy - 0.60 mg/kg
1
Related Grade ≥3 TEAE
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
0
BNT141 Monotherapy - 0.30 mg/kg
0
BNT141 Monotherapy - 0.45 mg/kg
0
BNT141 Monotherapy - 0.60 mg/kg
1
Any serious TEAE
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
1
BNT141 Monotherapy - 0.30 mg/kg
1
BNT141 Monotherapy - 0.45 mg/kg
1
BNT141 Monotherapy - 0.60 mg/kg
2
Related serious TEAE
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
0
BNT141 Monotherapy - 0.30 mg/kg
1
BNT141 Monotherapy - 0.45 mg/kg
0
BNT141 Monotherapy - 0.60 mg/kg
1
TEAE of special interest
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
0
BNT141 Monotherapy - 0.30 mg/kg
1
BNT141 Monotherapy - 0.45 mg/kg
0
BNT141 Monotherapy - 0.60 mg/kg
0
TEAE leading to death
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
0
BNT141 Monotherapy - 0.30 mg/kg
0
BNT141 Monotherapy - 0.45 mg/kg
0
BNT141 Monotherapy - 0.60 mg/kg
0
Occurrence of Dose Reductions and Discontinuation of BNT141 Due to TEAEsPrimary· From start of BNT141 treatment until the second Safety Follow-up Visit (60 ± 7 days after last dose), up to 30 weeks.
All TEAEs are included, i.e., AEs with an onset date on or after the first dose of BNT141 (if the AE was absent before the first dose) or worsened after the first dose of BNT141 (if the AE was present before the first dose). AEs with an onset date \>60 days after the last dose of BNT141 are included only if assessed as related to BNT141 by the investigator
TEAE leading to treatment discontinuation
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
0
BNT141 Monotherapy - 0.30 mg/kg
0
BNT141 Monotherapy - 0.45 mg/kg
0
BNT141 Monotherapy - 0.60 mg/kg
0
Related TEAE leading to treatment discontinuation
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
0
BNT141 Monotherapy - 0.30 mg/kg
0
BNT141 Monotherapy - 0.45 mg/kg
0
BNT141 Monotherapy - 0.60 mg/kg
0
TEAE leading to study drug interruption
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
0
BNT141 Monotherapy - 0.30 mg/kg
2
BNT141 Monotherapy - 0.45 mg/kg
1
BNT141 Monotherapy - 0.60 mg/kg
1
Related TEAE leading to study drug interruption
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
0
BNT141 Monotherapy - 0.30 mg/kg
2
BNT141 Monotherapy - 0.45 mg/kg
0
BNT141 Monotherapy - 0.60 mg/kg
1
TEAE leading to dose reduction
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
0
BNT141 Monotherapy - 0.30 mg/kg
0
BNT141 Monotherapy - 0.45 mg/kg
0
BNT141 Monotherapy - 0.60 mg/kg
0
Related TEAE leading to dose reduction
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
0
BNT141 Monotherapy - 0.30 mg/kg
0
BNT141 Monotherapy - 0.45 mg/kg
0
BNT141 Monotherapy - 0.60 mg/kg
0
TEAE leading to dose rate reduction
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
0
BNT141 Monotherapy - 0.30 mg/kg
0
BNT141 Monotherapy - 0.45 mg/kg
0
BNT141 Monotherapy - 0.60 mg/kg
0
Related TEAE leading to dose rate reduction
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
0
BNT141 Monotherapy - 0.30 mg/kg
0
BNT141 Monotherapy - 0.45 mg/kg
0
BNT141 Monotherapy - 0.60 mg/kg
0
Occurrence of Dose-limiting Toxicities (DLTs) Within a Patient During the DLT Evaluation PeriodPrimary· First treatment cycle (From first dose up to 21 days after first dose)
Serious AEs, non-serious Grade ≥ 3 non-hematological and hematological AEs as defined per DLT criteria and clinically significant abnormal laboratory values Grade ≥ 3 were collected and considered a DLT if assessed by the investigator to be at least possibly related to BNT141. Toxicities clearly not related to BNT141 (e.g., progressive disease, comorbidity, etc.) were not considered a DLT. The NCI CTCAE v.5.0 was used to grade the intensity of AEs.
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
0
BNT141 Monotherapy - 0.30 mg/kg
0
BNT141 Monotherapy - 0.45 mg/kg
0
BNT141 Monotherapy - 0.60 mg/kg
0
RiboMab PK Parameter - Area Under the Concentration Time Curve (AUC)Secondary· First treatment cycle (From first dose up to 21 days after first dose)
Intact RiboMab (full-length and fully assembled antibody) PK serum samples were collected and analyzed.
AUC (0-tau), AUC (0-inf) and AUC (0-504) were estimated from serum concentration data from Cycle 1 using non-compartmental analysis.
AUC (0-inf): Area under the drug concentration-time curve, from time zero to infinity.
AUC (0-504): Area under the drug concentration-time curve, from time zero to 504 hours after the start of the infusion.
AUC (0-tau): Area under the drug concentration-time curve, from time zero over the dosing interval at steady-state (Tau = 504 hours corresponding to 3-w
AUC (0-tau)
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
1613407.9486
± 50
BNT141 Monotherapy - 0.30 mg/kg
5798293.4278
± 30
BNT141 Monotherapy - 0.45 mg/kg
5499389.8684
± 40
BNT141 Monotherapy - 0.60 mg/kg
5244472.7649
± 60
AUC (0-inf)
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
2166227.7262
± 50
BNT141 Monotherapy - 0.30 mg/kg
9838894.4371
± 50
BNT141 Monotherapy - 0.45 mg/kg
9128700.3987
± 50
BNT141 Monotherapy - 0.60 mg/kg
6739801.3745
± 50
AUC (0-504)
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
1615489.8795
± 50
BNT141 Monotherapy - 0.30 mg/kg
5736526.2444
± 30
BNT141 Monotherapy - 0.45 mg/kg
6253473.9330
± 40
BNT141 Monotherapy - 0.60 mg/kg
5283854.6455
± 60
RiboMab PK Parameter - ClearanceSecondary· First treatment cycle (From first dose up to 21 days after first dose)
Intact RiboMab (full-length and fully assembled antibody) PK serum samples were collected and analyzed.
Clearance was estimated from serum concentration from Cycle 1 data using non-compartmental analysis.
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
0.0065
± 60
BNT141 Monotherapy - 0.30 mg/kg
0.0021
± 40
BNT141 Monotherapy - 0.45 mg/kg
0.0036
± 50
BNT141 Monotherapy - 0.60 mg/kg
0.0066
± 70
RiboMab PK Parameter - Volume of Distribution at Steady State (Vss)Secondary· First treatment cycle (From first dose up to 21 days after first dose)
Intact RiboMab (full-length and fully assembled antibody) PK serum samples were collected and analyzed.
Volume of distribution at steady state (Vss) was estimated as mean residence time calculated using last measured concentration (MRT inf) \* CL.
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
2.2103
± 70
BNT141 Monotherapy - 0.30 mg/kg
1.1099
± 40
BNT141 Monotherapy - 0.45 mg/kg
1.5656
± 20
BNT141 Monotherapy - 0.60 mg/kg
2.0340
± 80
RiboMab PK Parameter - Maximum Serum Drug Concentration (Cmax)Secondary· First treatment cycle (From first dose up to 21 days after first dose)
Intact RiboMab (full-length and fully assembled antibody) PK serum samples were collected and analyzed.
Cmax was estimated from serum concentration from Cycle 1 data using non-compartmental analysis.
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
5844.7265
± 60
BNT141 Monotherapy - 0.30 mg/kg
17829.5955
± 40
BNT141 Monotherapy - 0.45 mg/kg
24001.7233
± 40
BNT141 Monotherapy - 0.60 mg/kg
19801.0462
± 60
RiboMab PK Parameter - Time to Reach Cmax (Tmax)Secondary· First treatment cycle (From first dose up to 21 days after first dose)
Intact RiboMab (full-length and fully assembled antibody) PK serum samples were collected and analyzed.
Tmax was estimated from serum concentration from Cycle 1 data using non-compartmental analysis.
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
59.80362
± 20
BNT141 Monotherapy - 0.30 mg/kg
61.02810
± 20
BNT141 Monotherapy - 0.45 mg/kg
68.18978
± 30
BNT141 Monotherapy - 0.60 mg/kg
54.72251
± 20
RiboMab PK Parameter - Concentration at the End of a Dosing Interval (Taken Directly Before Next Administration) (Ctrough)Secondary· Before start of Cycle 3 (plasma sample taken directly before BNT141 Cycle 3 administration)
Intact RiboMab (full-length and fully assembled antibody) PK serum samples were collected and analyzed.
Ctrough was estimated from serum concentration from Cycle 1 data using non-compartmental analysis.
Ctrough values are available for participants treated with dose level 1 and dose level 2 only.
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
3516.7500
± NA
BNT141 Monotherapy - 0.30 mg/kg
3734.1225
± 50
RiboMab PK Parameter - Half-time (t½)Secondary· First treatment cycle (From first dose up to 21 days after first dose)
Intact RiboMab (full-length and fully assembled antibody) PK serum samples were collected and analyzed.
T½ was estimated from serum concentration from Cycle 1 data using non-compartmental analysis.
Group
Value
95% CI
BNT141 Monotherapy - 0.15 mg/kg
236.9571
± 10
BNT141 Monotherapy - 0.30 mg/kg
366.7979
± 50
BNT141 Monotherapy - 0.45 mg/kg
304.9024
± 30
BNT141 Monotherapy - 0.60 mg/kg
214.7214
± 10
Adverse events — posted to ClinicalTrials.gov
Time frame: Deaths and SAEs: All events from the signing of the trial-specific informed consent from until the second Safety Follow-up Visit, up to 33 weeks. Other AEs: All TEAEs, i.e., AEs reported from the start of study drug treatment until the second Safety Follow-up Visit, up to 30 weeks..
Reporting threshold: 0%.
Adverse-event reports describe events observed during the trial — not all are caused by the drug.
This study was planned as an open-label, multi-site, Phase I/IIa dose escalation, safety, and pharmacokinetic (PK) trial of BNT141 followed by expansion cohorts in patients with Claudin 18.2 (CLDN18.2)-positive tumors.
The sponsor decided to stop the development of BNT141 on 24 July 2023 and the study was terminated early.
Publications & conference data
8 peer-reviewed publications reference this trial (live from Europe PMC):
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Publications: Europe PMC API search by NCT ID, retrieved 10 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by BioNTech SE
Last refreshed: 2 October 2024
Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT04683939.