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NCT04683939

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

Terminated Phase 1, PHASE2 Results posted Last updated 2 October 2024
What this trial tests

Phase 1, PHASE2 trial testing BNT141 in Solid Tumor in 13 participants. Terminated before completion.

Timeline
18 January 2022
Primary endpoint
24 July 2023
24 July 2023

Quick facts

Lead sponsorBioNTech SE
PhasePhase 1, PHASE2
StatusTerminated
Study typeINTERVENTIONAL
Allocationnon randomized
Designsequential
Maskingnone
Primary purposetreatment
Enrollment13
Start date18 January 2022
Primary completion24 July 2023
Estimated completion24 July 2023
Sites7 locations across Canada, United States

Drugs / interventions tested

Conditions studied

Sponsor

BioNTech SE — full company profile →

Who can join

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 Relationship Primary · 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
GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg3
BNT141 Monotherapy - 0.30 mg/kg3
BNT141 Monotherapy - 0.45 mg/kg4
BNT141 Monotherapy - 0.60 mg/kg3
Related TEAE
GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg3
BNT141 Monotherapy - 0.30 mg/kg3
BNT141 Monotherapy - 0.45 mg/kg4
BNT141 Monotherapy - 0.60 mg/kg3
Grade ≥3 TEAE
GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg0
BNT141 Monotherapy - 0.30 mg/kg2
BNT141 Monotherapy - 0.45 mg/kg2
BNT141 Monotherapy - 0.60 mg/kg1
Related Grade ≥3 TEAE
GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg0
BNT141 Monotherapy - 0.30 mg/kg0
BNT141 Monotherapy - 0.45 mg/kg0
BNT141 Monotherapy - 0.60 mg/kg1
Any serious TEAE
GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg1
BNT141 Monotherapy - 0.30 mg/kg1
BNT141 Monotherapy - 0.45 mg/kg1
BNT141 Monotherapy - 0.60 mg/kg2
Related serious TEAE
GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg0
BNT141 Monotherapy - 0.30 mg/kg1
BNT141 Monotherapy - 0.45 mg/kg0
BNT141 Monotherapy - 0.60 mg/kg1
TEAE of special interest
GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg0
BNT141 Monotherapy - 0.30 mg/kg1
BNT141 Monotherapy - 0.45 mg/kg0
BNT141 Monotherapy - 0.60 mg/kg0
TEAE leading to death
GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg0
BNT141 Monotherapy - 0.30 mg/kg0
BNT141 Monotherapy - 0.45 mg/kg0
BNT141 Monotherapy - 0.60 mg/kg0
Occurrence of Dose Reductions and Discontinuation of BNT141 Due to TEAEs Primary · 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
GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg0
BNT141 Monotherapy - 0.30 mg/kg0
BNT141 Monotherapy - 0.45 mg/kg0
BNT141 Monotherapy - 0.60 mg/kg0
Related TEAE leading to treatment discontinuation
GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg0
BNT141 Monotherapy - 0.30 mg/kg0
BNT141 Monotherapy - 0.45 mg/kg0
BNT141 Monotherapy - 0.60 mg/kg0
TEAE leading to study drug interruption
GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg0
BNT141 Monotherapy - 0.30 mg/kg2
BNT141 Monotherapy - 0.45 mg/kg1
BNT141 Monotherapy - 0.60 mg/kg1
Related TEAE leading to study drug interruption
GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg0
BNT141 Monotherapy - 0.30 mg/kg2
BNT141 Monotherapy - 0.45 mg/kg0
BNT141 Monotherapy - 0.60 mg/kg1
TEAE leading to dose reduction
GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg0
BNT141 Monotherapy - 0.30 mg/kg0
BNT141 Monotherapy - 0.45 mg/kg0
BNT141 Monotherapy - 0.60 mg/kg0
Related TEAE leading to dose reduction
GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg0
BNT141 Monotherapy - 0.30 mg/kg0
BNT141 Monotherapy - 0.45 mg/kg0
BNT141 Monotherapy - 0.60 mg/kg0
TEAE leading to dose rate reduction
GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg0
BNT141 Monotherapy - 0.30 mg/kg0
BNT141 Monotherapy - 0.45 mg/kg0
BNT141 Monotherapy - 0.60 mg/kg0
Related TEAE leading to dose rate reduction
GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg0
BNT141 Monotherapy - 0.30 mg/kg0
BNT141 Monotherapy - 0.45 mg/kg0
BNT141 Monotherapy - 0.60 mg/kg0
Occurrence of Dose-limiting Toxicities (DLTs) Within a Patient During the DLT Evaluation Period Primary · 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.

GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg0
BNT141 Monotherapy - 0.30 mg/kg0
BNT141 Monotherapy - 0.45 mg/kg0
BNT141 Monotherapy - 0.60 mg/kg0
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)
GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg1613407.9486± 50
BNT141 Monotherapy - 0.30 mg/kg5798293.4278± 30
BNT141 Monotherapy - 0.45 mg/kg5499389.8684± 40
BNT141 Monotherapy - 0.60 mg/kg5244472.7649± 60
AUC (0-inf)
GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg2166227.7262± 50
BNT141 Monotherapy - 0.30 mg/kg9838894.4371± 50
BNT141 Monotherapy - 0.45 mg/kg9128700.3987± 50
BNT141 Monotherapy - 0.60 mg/kg6739801.3745± 50
AUC (0-504)
GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg1615489.8795± 50
BNT141 Monotherapy - 0.30 mg/kg5736526.2444± 30
BNT141 Monotherapy - 0.45 mg/kg6253473.9330± 40
BNT141 Monotherapy - 0.60 mg/kg5283854.6455± 60
RiboMab PK Parameter - Clearance 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. Clearance was estimated from serum concentration from Cycle 1 data using non-compartmental analysis.

GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg0.0065± 60
BNT141 Monotherapy - 0.30 mg/kg0.0021± 40
BNT141 Monotherapy - 0.45 mg/kg0.0036± 50
BNT141 Monotherapy - 0.60 mg/kg0.0066± 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.

GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg2.2103± 70
BNT141 Monotherapy - 0.30 mg/kg1.1099± 40
BNT141 Monotherapy - 0.45 mg/kg1.5656± 20
BNT141 Monotherapy - 0.60 mg/kg2.0340± 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.

GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg5844.7265± 60
BNT141 Monotherapy - 0.30 mg/kg17829.5955± 40
BNT141 Monotherapy - 0.45 mg/kg24001.7233± 40
BNT141 Monotherapy - 0.60 mg/kg19801.0462± 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.

GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg59.80362± 20
BNT141 Monotherapy - 0.30 mg/kg61.02810± 20
BNT141 Monotherapy - 0.45 mg/kg68.18978± 30
BNT141 Monotherapy - 0.60 mg/kg54.72251± 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.

GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg3516.7500± NA
BNT141 Monotherapy - 0.30 mg/kg3734.1225± 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.

GroupValue95% CI
BNT141 Monotherapy - 0.15 mg/kg236.9571± 10
BNT141 Monotherapy - 0.30 mg/kg366.7979± 50
BNT141 Monotherapy - 0.45 mg/kg304.9024± 30
BNT141 Monotherapy - 0.60 mg/kg214.7214± 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.

BNT141 Monotherapy - 0.15 mg/kg
Serious: 1/3 (33%)
Deaths: 1/3
BNT141 Monotherapy - 0.30 mg/kg
Serious: 1/3 (33%)
Deaths: 1/3
BNT141 Monotherapy - 0.45 mg/kg
Serious: 1/4 (25%)
Deaths: 2/4
BNT141 Monotherapy - 0.60 mg/kg
Serious: 2/3 (67%)
Deaths: 1/3

Serious adverse events (4 terms)

ReactionSystemBNT141 Monotherapy - 0.15 …BNT141 Monotherapy - 0.30 …BNT141 Monotherapy - 0.45 …BNT141 Monotherapy - 0.60 …
Cytokine release syndromeImmune system disorders
BacteraemiaInfections and infestations
Enterococcal bacteraemiaInfections and infestations
EmbolismVascular disorders
Other adverse events (52 terms — click to expand)

ReactionSystemBNT141 Monotherapy - 0.15 …BNT141 Monotherapy - 0.30 …BNT141 Monotherapy - 0.45 …BNT141 Monotherapy - 0.60 …
VomitingGastrointestinal disorders
Cytokine release syndromeImmune system disorders
Abdominal painGastrointestinal disorders
ConstipationGastrointestinal disorders
DiarrhoeaGastrointestinal disorders
NauseaGastrointestinal disorders
ChillsGeneral disorders
Non-cardiac chest painGeneral disorders
Decreased appetiteMetabolism and nutrition disorders
CoughRespiratory, thoracic and mediastinal disorders
AnaemiaBlood and lymphatic system disorders
Lymph node painBlood and lymphatic system disorders
LymphocytosisBlood and lymphatic system disorders
ThrombocytopeniaBlood and lymphatic system disorders
TinnitusEar and labyrinth disorders
Abdominal distensionGastrointestinal disorders
Abdominal pain upperGastrointestinal disorders
Dry mouthGastrointestinal disorders
DyspepsiaGastrointestinal disorders
Faeces discolouredGastrointestinal disorders
HaemorrhoidsGastrointestinal disorders
Obstruction gastricGastrointestinal disorders
Drug intoleranceGeneral disorders
FatigueGeneral disorders
Oedema peripheralGeneral disorders
PyrexiaGeneral disorders
Urinary tract infectionInfections and infestations
ContusionInjury, poisoning and procedural complications
Infusion related reactionInjury, poisoning and procedural complications
Alanine aminotransferase increasedInvestigations
Aspartate aminotransferase increasedInvestigations
Neutrophil count decreasedInvestigations
Weight decreasedInvestigations
DehydrationMetabolism and nutrition disorders
HyperglycaemiaMetabolism and nutrition disorders
Back painMusculoskeletal and connective tissue disorders
MyalgiaMusculoskeletal and connective tissue disorders
Dizziness posturalNervous system disorders
HeadacheNervous system disorders
ParaesthesiaNervous system disorders

Most-reported serious reactions: Cytokine release syndrome, Bacteraemia, Enterococcal bacteraemia, Embolism.

Data from ClinicalTrials.gov NCT04683939 adverse events section.

Sponsor's own description

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):

  1. Claudin18.2 is a novel molecular biomarker for tumor-targeted immunotherapy.
    Cao W, Xing H, Li Y, Tian W, et al · · 2022 · cited 127× · PMID 35642043 · DOI 10.1186/s40364-022-00385-1
  2. Recent Advancement in mRNA Vaccine Development and Applications.
    Al Fayez N, Nassar MS, Alshehri AA, Alnefaie MK, et al · · 2023 · cited 95× · PMID 37514158 · DOI 10.3390/pharmaceutics15071972
  3. mRNA-based vaccines and therapeutics: an in-depth survey of current and upcoming clinical applications.
    Wang YS, Kumari M, Chen GH, Hong MH, et al · · 2023 · cited 93× · PMID 37805495 · DOI 10.1186/s12929-023-00977-5
  4. mRNA nanomedicine: Design and recent applications.
    Kubiatowicz LJ, Mohapatra A, Krishnan N, Fang RH, et al · · 2022 · cited 88× · PMID 36249890 · DOI 10.1002/exp.20210217
  5. Progress and prospects of mRNA-based drugs in pre-clinical and clinical applications.
    Shi Y, Shi M, Wang Y, You J. · · 2024 · cited 67× · PMID 39543114 · DOI 10.1038/s41392-024-02002-z
  6. Targeting CLDN18.2 in cancers of the gastrointestinal tract: New drugs and new indications.
    Chen J, Xu Z, Hu C, Zhang S, et al · · 2023 · cited 49× · PMID 36969060 · DOI 10.3389/fonc.2023.1132319
  7. Targeted Cancer Immunotherapy: Nanoformulation Engineering and Clinical Translation.
    Yu M, Yang W, Yue W, Chen Y. · · 2022 · cited 35× · PMID 36257824 · DOI 10.1002/advs.202204335
  8. mRNA-Based Therapeutics in Cancer Treatment.
    Sun H, Zhang Y, Wang G, Yang W, et al · · 2023 · cited 33× · PMID 36839944 · DOI 10.3390/pharmaceutics15020622

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