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NCT02659631

PF-06671008 Dose Escalation Study in Advanced Solid Tumors

Terminated Phase 1 Results posted Last updated 6 May 2020
What this trial tests

Phase 1 trial testing PF-06671008 in Neoplasms in 28 participants. Terminated before completion.

Timeline
28 April 2016
Primary endpoint
29 March 2019
29 March 2019

Quick facts

Lead sponsorPfizer
PhasePhase 1
StatusTerminated
Study typeINTERVENTIONAL
Allocationna
Designsingle group
Maskingnone
Primary purposetreatment
Enrollment28
Start date28 April 2016
Primary completion29 March 2019
Estimated completion29 March 2019
Sites9 locations across United States

Drugs / interventions tested

Conditions studied

Sponsor

Pfizer — full company profile →

Who can join

18 and older, any sex, with Neoplasms. 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.

Number of Participants With Dose-Limiting Toxicities (DLTs) - Part 1 Primary · Baseline through Day 21 (Cycle 1)

DLT was defined as any of the following adverse events occurring in the first cycle of treatment (21 days after the first dose): a) Hematologic: Febrile neutropenia defined as an absolute neutrophil count (ANC) \<1.0 x 10\^9/L with a single temperature of \>38.3°C, or 101°F, or a sustained temperature of \>=38°C, or 100.4°F, for more than one hour; b) Non-hematologic: Delay by more than 2 weeks in receiving the next scheduled dose due to persisting treatment related toxicities; c) Any grade 3 or 4 clinically-relevant hematologic or non-hematologic toxicity.

GroupValue95% CI
PF-06671008 1.5 ng/kg IV0
PF-06671008 7.5 ng/kg IV0
PF-06671008 20 ng/kg IV0
PF-06671008 50 ng/kg IV0
PF-06671008 100 ng/kg IV0
PF-06671008 200 ng/kg IV0
PF-06671008 300 ng/kg IV0
PF-06671008 400 ng/kg IV1
PF-06671008 200 ng/kg SC0
PF-06671008 200 ng/kg Prime and 300 ng/kg Maintenance IV0
Maximum Serum Concentration (Cmax) of PF-06671008 Secondary · C1D1 0, 1, 2, 4, 8, 24, 48, 72 and 96 hrs post-dose, C2D1 0, 2, 4, 8, 24, 48, 72 and 96 hrs post-dose

Maximum serum concentration (Cmax) of PF-06671008 was observed directly from data. Geometric mean was not calculated if fewer than 3 participants had reportable parameter values.

Cycle 1 Day 1
GroupValue95% CI
PF-06671008 1.5 ng/kg IVNA± NA
PF-06671008 7.5 ng/kg IVNA± NA
PF-06671008 20 ng/kg IV0.1926± 20
PF-06671008 50 ng/kg IVNA± NA
PF-06671008 100 ng/kg IV1.108± 32
PF-06671008 200 ng/kg IV2.008± 33
PF-06671008 300 ng/kg IV2.387± 36
PF-06671008 400 ng/kg IV4.049± 14
PF-06671008 200 ng/kg SCNA± NA
PF-06671008 200 ng/kg Prime and 300 ng/kg Maintenance IVNA± NA
Cycle 2 Day 1
GroupValue95% CI
PF-06671008 1.5 ng/kg IVNA± NA
PF-06671008 7.5 ng/kg IVNA± NA
PF-06671008 20 ng/kg IV0.2470± 36
PF-06671008 50 ng/kg IVNA± NA
PF-06671008 100 ng/kg IV0.8471± 51
PF-06671008 200 ng/kg IV2.014± 7
PF-06671008 300 ng/kg IVNA± NA
PF-06671008 200 ng/kg SCNA± NA
PF-06671008 200 ng/kg Prime and 300 ng/kg Maintenance IVNA± NA
Time to Reach Maximum Observed Serum Concentration (Tmax) of PF-06671008 Secondary · C1D1 0, 1, 2, 4, 8, 24, 48, 72 and 96 hrs post-dose, C2D1 0, 2, 4, 8, 24, 48, 72 and 96 hrs post-dose

Time for Maximum serum concentration (Tmax) of PF-06671008 was observed directly from data as time of first occurrence.

Cycle 1 Day 1
GroupValue95% CI
PF-06671008 7.5 ng/kg IV2.022.02 – 2.02
PF-06671008 20 ng/kg IV4.052.00 – 4.08
PF-06671008 50 ng/kg IV2.291.92 – 2.65
PF-06671008 100 ng/kg IV2.072.00 – 4.10
PF-06671008 200 ng/kg IV2.332.00 – 3.98
PF-06671008 300 ng/kg IV2.172.05 – 3.63
PF-06671008 400 ng/kg IV2.052.05 – 3.00
PF-06671008 200 ng/kg SC50.58.12 – 92.9
PF-06671008 200 ng/kg Prime and 300 ng/kg Maintenance IV1.921.92 – 1.92
Cycle 2 Day 1
GroupValue95% CI
PF-06671008 7.5 ng/kg IV2.122.12 – 2.12
PF-06671008 20 ng/kg IV3.982.00 – 4.22
PF-06671008 50 ng/kg IV3.903.90 – 3.90
PF-06671008 100 ng/kg IV4.002.17 – 4.28
PF-06671008 200 ng/kg IV2.091.92 – 2.17
PF-06671008 300 ng/kg IV2.142.10 – 2.17
PF-06671008 200 ng/kg SC24.623.4 – 25.7
PF-06671008 200 ng/kg Prime and 300 ng/kg Maintenance IV1.981.98 – 1.98
Terminal Elimination Half-life (t1/2) of PF-06671008 Secondary · C1D1 0, 1, 2, 4, 8, 24, 48, 72 and 96 hrs post-dose, C2D1 0, 2, 4, 8, 24, 48, 72 and 96 hrs post-dose

Terminal elimination half-life (t1/2) of PF-06671008 was calculated as ln(2)/kel, where kel was the terminal phase rate constant calculated by a linear regression of the log-linear concentration-time curve. Only those data points judged to describe the terminal log-linear decline were used in the regression. Arithmetic mean was not calculated if fewer than 3 participants had reportable parameter values.

Cycle 1 Day 1
GroupValue95% CI
PF-06671008 50 ng/kg IVNA± NA
PF-06671008 100 ng/kg IV31.77± 7.6055
PF-06671008 200 ng/kg IV35.30± 5.4065
PF-06671008 300 ng/kg IVNA± NA
PF-06671008 400 ng/kg IVNA± NA
PF-06671008 200 ng/kg Prime and 300 ng/kg Maintenance IVNA± NA
Cycle 2 Day 1
GroupValue95% CI
PF-06671008 100 ng/kg IVNA± NA
PF-06671008 200 ng/kg IVNA± NA
PF-06671008 300 ng/kg IVNA± NA
Area Under the Curve From Time Zero to End of Dosing Interval (AUCtau) of PF-06671008 Secondary · C1D1 0, 1, 2, 4, 8, 24, 48, 72 and 96 hrs post-dose, C2D1 0, 2, 4, 8, 24, 48, 72 and 96 hrs post-dose

Tau refers to the dosing interval, which was 1 week. Area under the concentration-time profile from time 0 to time tau (AUCtau) was determined using linear/log trapezoidal method. Geometric mean was not calculated if fewer than 3 participants had reportable parameter values.

Cycle 1 Day 1
GroupValue95% CI
PF-06671008 1.5 ng/kg IVNA± NA
PF-06671008 7.5 ng/kg IVNA± NA
PF-06671008 20 ng/kg IV5.252± 25
PF-06671008 50 ng/kg IVNA± NA
PF-06671008 100 ng/kg IV42.75± 35
PF-06671008 200 ng/kg IV87.31± 29
PF-06671008 300 ng/kg IVNA± NA
PF-06671008 400 ng/kg IVNA± NA
PF-06671008 200 ng/kg SCNA± NA
PF-06671008 200 ng/kg Prime and 300 ng/kg Maintenance IVNA± NA
Cycle 2 Day 1
GroupValue95% CI
PF-06671008 1.5 ng/kg IVNA± NA
PF-06671008 7.5 ng/kg IVNA± NA
PF-06671008 20 ng/kg IV10.31± 43
PF-06671008 50 ng/kg IVNA± NA
PF-06671008 100 ng/kg IVNA± NA
PF-06671008 200 ng/kg IV79.17± 36
PF-06671008 300 ng/kg IVNA± NA
PF-06671008 200 ng/kg SCNA± NA
PF-06671008 200 ng/kg Prime and 300 ng/kg Maintenance IVNA± NA
Area Under the Curve From Time 0 Extrapolated to Infinity Time (AUCinf) of PF-06671008 Secondary · C1D1 0, 1, 2, 4, 8, 24, 48, 72 and 96 hrs post-dose, C2D1 0, 2, 4, 8, 24, 48, 72 and 96 hrs post-dose

AUCinf was calculated as AUClast +(Clast\*/kel), where AUClast is area under the serum concentration-time profile from time 0 to the time of the last quantifiable concentration, Clast\* is the predicted serum concentration at the last quantifiable time point estimated from the log-linear regression analysis, kel is the terminal phase rate constant calculated by a linear regression of the log-linear concentration-time curve. Only those data points judged to describe the terminal log-linear decline were used in the regression. Geometric mean was not calculated if fewer than 3 participants had r

Cycle 1 Day 1
GroupValue95% CI
PF-06671008 50 ng/kg IVNA± NA
PF-06671008 100 ng/kg IV47.09± 41
PF-06671008 200 ng/kg IV90.35± 19
PF-06671008 300 ng/kg IVNA± NA
PF-06671008 400 ng/kg IVNA± NA
PF-06671008 200 ng/kg Prime and 300 ng/kg Maintenance IVNA± NA
Systemic Clearance (CL) of PF-06671008 Secondary · C1D1 0, 1, 2, 4, 8, 24, 48, 72 and 96 hrs post-dose, C2D1 0, 2, 4, 8, 24, 48, 72 and 96 hrs post-dose

Systemic Clearance (CL) was calculated as dose/AUCinf, where AUCinf was area under the serum concentration-time profile from time 0 extrapolated to infinite time. This outcome measure only applies to IV arms. Geometric mean was not calculated if fewer than 3 participants had reportable parameter values.

Cycle 1 Day 1
GroupValue95% CI
PF-06671008 50 ng/kg IVNA± NA
PF-06671008 100 ng/kg IV2.191± 47
PF-06671008 200 ng/kg IV2.236± 20
PF-06671008 300 ng/kg IVNA± NA
PF-06671008 400 ng/kg IVNA± NA
PF-06671008 200 ng/kg Prime and 300 ng/kg Maintenance IVNA± NA
Cycle 2 Day 1
GroupValue95% CI
PF-06671008 7.5 ng/kg IVNA± NA
PF-06671008 20 ng/kg IV1.954± 40
PF-06671008 50 ng/kg IVNA± NA
PF-06671008 100 ng/kg IVNA± NA
PF-06671008 200 ng/kg IV1.827± 77
PF-06671008 300 ng/kg IVNA± NA
PF-06671008 200 ng/kg Prime and 300 ng/kg Maintenance IVNA± NA
Apparent Clearance (CL/F) of PF-06671008 Secondary · C1D1 0, 1, 2, 4, 8, 24, 48, 72 and 96 hrs post-dose, C2D1 0, 2, 4, 8, 24, 48, 72 and 96 hrs post-dose

Apparent Clearance (CL/F) was calculated as dose/AUCinf, where AUCinf was area under the serum concentration-time profile from time 0 extrapolated to infinite time. This outcome measure only applies to SC arm. Geometric mean was not calculated if fewer than 3 participants had reportable parameter values.

Cycle 2 Day 1
GroupValue95% CI
PF-06671008 200 ng/kg SCNA± NA
Number of Participants With OR - Part 1 Secondary · Baseline and every 6 weeks for the first 6 months, then every 12 weeks until disease progression, unacceptable toxicity, or up to 24 months

Number of participants with OR based on assessment of CR or PR according to RECIST v1.1. CR was defined as complete disappearance of all target lesions and non-target disease, with the exception of nodal disease. All nodes, both target and non-target, must decrease to normal (short axis \<10 mm). No new lesions. PR was defined as \>=30% decrease under baseline of the sum of diameters of all target lesions. The short axis was used in the sum for target nodes, while the longest diameter was used in the sum for all other target lesions. No unequivocal progression of non-target disease. No new l

GroupValue95% CI
PF-06671008 1.5 ng/kg IV0
PF-06671008 7.5 ng/kg IV0
PF-06671008 20 ng/kg IV0
PF-06671008 50 ng/kg IV0
PF-06671008 100 ng/kg IV0
PF-06671008 200 ng/kg IV0
PF-06671008 300 ng/kg IV0
PF-06671008 400 ng/kg IV0
PF-06671008 200 ng/kg SC0
PF-06671008 200 ng/kg Prime and 300 ng/kg Maintenance IV0
Number of Participants With Anti Drug Antibodies (ADA) and Neutralizing Antibodies (NAb) Against PF-06671008 Secondary · C1D1 0 hrs, D15 0 hrs, and C2D1 0 hrs, and D1 0 hrs post additional dosings, up to 24 months

ADA against PF-06671008 in human serum samples was determined following a tiered approach using screening, confirmation, and titer/quantification by semi-quantitative enzyme linked immunosorbent assay (ELISA). Endpoint titer \>=1.18 was considered positive.

ADA
GroupValue95% CI
PF-06671008 1.5 ng/kg IV0
PF-06671008 7.5 ng/kg IV0
PF-06671008 20 ng/kg IV0
PF-06671008 50 ng/kg IV0
PF-06671008 100 ng/kg IV0
PF-06671008 200 ng/kg IV0
PF-06671008 300 ng/kg IV0
PF-06671008 400 ng/kg IV0
PF-06671008 200 ng/kg SC1
PF-06671008 200 ng/kg Prime and 300 ng/kg Maintenance IV0
NAb
GroupValue95% CI
PF-06671008 1.5 ng/kg IVNA
PF-06671008 7.5 ng/kg IVNA
PF-06671008 20 ng/kg IVNA
PF-06671008 50 ng/kg IVNA
PF-06671008 100 ng/kg IVNA
PF-06671008 200 ng/kg IVNA
PF-06671008 300 ng/kg IVNA
PF-06671008 400 ng/kg IVNA
PF-06671008 200 ng/kg SCNA
PF-06671008 200 ng/kg Prime and 300 ng/kg Maintenance IVNA

Adverse events — posted to ClinicalTrials.gov

Time frame: For all Adverse Events: Start of treatment to and including 28 days after the last dose. For All-Cause Mortality: Start of treatment to and including 28 days after the last dose + follow-up period (up to 2 years). Reporting threshold: 5%. Adverse-event reports describe events observed during the trial — not all are caused by the drug.

PF-06671008 1.5 ng/kg IV
Serious: 0/1 (0%)
Deaths: 1/1
PF-06671008 7.5 ng/kg IV
Serious: 1/2 (50%)
Deaths: 2/2
PF-06671008 20 ng/kg IV
Serious: 1/3 (33%)
Deaths: 1/3
PF-06671008 50 ng/kg IV
Serious: 2/2 (100%)
Deaths: 1/2
PF-06671008 100 ng/kg IV
Serious: 4/4 (100%)
Deaths: 4/4
PF-06671008 200 ng/kg IV
Serious: 4/5 (80%)
Deaths: 2/5
PF-06671008 300 ng/kg IV
Serious: 3/4 (75%)
Deaths: 1/4
PF-06671008 400 ng/kg IV
Serious: 2/3 (67%)
Deaths: 3/3
PF-06671008 200 ng/kg SC
Serious: 0/2 (0%)
Deaths: 1/2
PF-06671008 200 ng/kg Prime and 300 ng/kg Maintenance IV
Serious: 0/1 (0%)
Deaths: 0/1

Serious adverse events (6 terms)

ReactionSystemPF-06671008 1.5 ng/kg IVPF-06671008 7.5 ng/kg IVPF-06671008 20 ng/kg IVPF-06671008 50 ng/kg IVPF-06671008 100 ng/kg IVPF-06671008 200 ng/kg IVPF-06671008 300 ng/kg IVPF-06671008 400 ng/kg IVPF-06671008 200 ng/kg SCPF-06671008 200 ng/kg Prim…
Cytokine release syndromeImmune system disorders
AnaemiaBlood and lymphatic system disorders
DiarrhoeaGastrointestinal disorders
Neoplasm progressionNeoplasms benign, malignant and unspecified (incl cysts and polyps)
Rectal adenocarcinomaNeoplasms benign, malignant and unspecified (incl cysts and polyps)
PneumonitisRespiratory, thoracic and mediastinal disorders
Other adverse events (95 terms — click to expand)

ReactionSystemPF-06671008 1.5 ng/kg IVPF-06671008 7.5 ng/kg IVPF-06671008 20 ng/kg IVPF-06671008 50 ng/kg IVPF-06671008 100 ng/kg IVPF-06671008 200 ng/kg IVPF-06671008 300 ng/kg IVPF-06671008 400 ng/kg IVPF-06671008 200 ng/kg SCPF-06671008 200 ng/kg Prim…
FatigueGeneral disorders
PyrexiaGeneral disorders
Cytokine release syndromeImmune system disorders
Lymphocyte count decreasedInvestigations
NauseaGastrointestinal disorders
VomitingGastrointestinal disorders
Oedema peripheralGeneral disorders
Platelet count decreasedInvestigations
White blood cell count decreasedInvestigations
Decreased appetiteMetabolism and nutrition disorders
HypophosphataemiaMetabolism and nutrition disorders
MyalgiaMusculoskeletal and connective tissue disorders
HeadacheNervous system disorders
DyspnoeaRespiratory, thoracic and mediastinal disorders
PruritusSkin and subcutaneous tissue disorders
AnaemiaBlood and lymphatic system disorders
NeutropeniaBlood and lymphatic system disorders
PalpitationsCardiac disorders
Sinus arrhythmiaCardiac disorders
TachycardiaCardiac disorders
Ventricular arrhythmiaCardiac disorders
TinnitusEar and labyrinth disorders
VertigoEar and labyrinth disorders
Periorbital oedemaEye disorders
Vision blurredEye disorders
Abdominal painGastrointestinal disorders
Abdominal pain upperGastrointestinal disorders
Aphthous ulcerGastrointestinal disorders
ConstipationGastrointestinal disorders
DiarrhoeaGastrointestinal disorders
Dry mouthGastrointestinal disorders
DyspepsiaGastrointestinal disorders
DysphagiaGastrointestinal disorders
Gastrooesophageal reflux diseaseGastrointestinal disorders
PancreatitisGastrointestinal disorders
StomatitisGastrointestinal disorders
Chest painGeneral disorders
ChillsGeneral disorders
Infusion site extravasationGeneral disorders
Injection site erythemaGeneral disorders

Most-reported serious reactions: Cytokine release syndrome, Anaemia, Diarrhoea, Neoplasm progression, Rectal adenocarcinoma, Pneumonitis.

Data from ClinicalTrials.gov NCT02659631 adverse events section.

Sponsor's own description

The study will evaluate the safety, pharmacokinetics and pharmacodynamics of increasing doses of PF-06671008 in patients with advanced solid tumors with the potential to have P-cadherin expression. The study will then expand to look at the selected dose in patients with P-cadherin expressing TNBC, CRC or NSCLC.

Publications & conference data

8 peer-reviewed publications reference this trial (live from Europe PMC):

  1. Bispecific Antibodies: From Research to Clinical Application.
    Ma J, Mo Y, Tang M, Shen J, et al · · 2021 · cited 199× · PMID 34025638 · DOI 10.3389/fimmu.2021.626616
  2. Bi-specific and tri-specific antibodies- the next big thing in solid tumor therapeutics.
    Runcie K, Budman DR, John V, Seetharamu N. · · 2018 · cited 120× · PMID 30249178 · DOI 10.1186/s10020-018-0051-4
  3. T cell engaging bispecific antibody (T-BsAb): From technology to therapeutics.
    Wu Z, Cheung NV. · · 2018 · cited 115× · PMID 28834699 · DOI 10.1016/j.pharmthera.2017.08.005
  4. Overcoming the challenges associated with CD3+ T-cell redirection in cancer.
    Singh A, Dees S, Grewal IS. · · 2021 · cited 82× · PMID 33469153 · DOI 10.1038/s41416-020-01225-5
  5. Biology drives the discovery of bispecific antibodies as innovative therapeutics.
    Nie S, Wang Z, Moscoso-Castro M, D'Souza P, et al · · 2020 · cited 79× · PMID 33928225 · DOI 10.1093/abt/tbaa003
  6. Emerging therapeutic agents for lung cancer.
    Dholaria B, Hammond W, Shreders A, Lou Y. · · 2016 · cited 66× · PMID 27938382 · DOI 10.1186/s13045-016-0365-z
  7. Bispecific antibodies in cancer therapy: Target selection and regulatory requirements.
    Sun Y, Yu X, Wang X, Yuan K, et al · · 2023 · cited 62× · PMID 37719370 · DOI 10.1016/j.apsb.2023.05.023
  8. A Translational Quantitative Systems Pharmacology Model for CD3 Bispecific Molecules: Application to Quantify T Cell-Mediated Tumor Cell Killing by P-Cadherin LP DART<sup>®</sup>.
    Betts A, Haddish-Berhane N, Shah DK, van der Graaf PH, et al · · 2019 · cited 60× · PMID 31119428 · DOI 10.1208/s12248-019-0332-z

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