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The safety and efficacy of this agent(s), or use in this setting, has not been established or is subject to confirmation. For an agent(s) whose safety and efficacy has not been established or confirmed, future regulatory approval or commercial availability is not guaranteed.

Clinical Trial Details

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Category

Other or Multiple Cancer Types

Glycoprotein-NMB Directed Antibody Drug Conjugate

PF-08046033 |GPS is an investigational compound. Its safety and efficacy have not been established.

A Phase 1 Study to Investigate PF-08046033 in Participants With Advanced Solid Tumors

Phase 1

NCT07519655

Active enrolling

Globe

Locations

United States, Puerto Rico, South Korea

QR Code

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for more information at clinicaltrials.gov

Study design
Participant Group/Arm

EXPERIMENTAL: Part 1: Cohort 1

Participants will receive PF-08046033 dose level 1 intravenously (IV).

Intervention/Treatment

DRUG: PF-08046033

Powder for solution for infusion.

Participant Group/Arm

EXPERIMENTAL: Part 1: Cohort 2

Participants will receive PF-08046033 dose level 2 IV.

Intervention/Treatment

DRUG: PF-08046033

Powder for solution for infusion.

Participant Group/Arm

EXPERIMENTAL: Part 1: Cohort 3

Participants will receive PF-08046033 dose level 3 IV.

Intervention/Treatment

DRUG: PF-08046033

Powder for solution for infusion.

Participant Group/Arm

EXPERIMENTAL: Part 1: Cohort 4

Participants will receive PF-08046033 dose level 4 IV.

Intervention/Treatment

DRUG: PF-08046033

Powder for solution for infusion.

Participant Group/Arm

EXPERIMENTAL: Part 1: Cohort 5

Participants will receive PF-08046033 dose level 5 IV.

Intervention/Treatment

DRUG: PF-08046033

Powder for solution for infusion.

Participant Group/Arm

EXPERIMENTAL: Part 1: Cohort 6

Participants will receive PF-08046033 dose level 6 IV.

Intervention/Treatment

DRUG: PF-08046033

Powder for solution for infusion.

Participant Group/Arm

EXPERIMENTAL: Part 1: Cohort 7

Participants will receive PF-08046033 dose level 7 IV.

Intervention/Treatment

DRUG: PF-08046033

Powder for solution for infusion.

Participant Group/Arm

EXPERIMENTAL: Part 2: Cohort 1 Non-Small Cell Lung Cancer (NSCLC)

PF-08046033: Specified dose IV on specified days

Intervention/Treatment

DRUG: PF-08046033

Powder for solution for infusion.

Participant Group/Arm

EXPERIMENTAL: Part 2: Cohort 2 Esophageal Squamous Cell Carcinoma (ESCC)

PF-08046033: Specified dose IV on specified days

Intervention/Treatment

DRUG: PF-08046033

Powder for solution for infusion.

Participant Group/Arm

EXPERIMENTAL: Part 2: Cohort 3 (Cutaneous Melanoma)

PF-08046033: Specified dose IV on specified days

Intervention/Treatment

DRUG: PF-08046033

Powder for solution for infusion.

Study design table for Clinical Trial
Key eligibility criteria
Inclusion criteria

1. Participants must have histologically-confirmed metastatic or unresectable locally advanced NSCLC, ESCC, or cutaneous melanoma. 2. Participants must have disease that has progressed on or be unable to tolerate standard treatments (Part 1) or 1-2 prior systemic therapies (Part 2). 3. Participants must have measurable disease. 4. Eastern Cooperative Oncology Group (ECOG) performance status is 0-1.

Exclusion criteria

1. Participants with known clinically active central nervous system (CNS) metastases. 2. Participants with pre-existing neuropathy ≥Grade 2 per NCI CTCAE v 5.0. 3. Uncontrolled diabetes mellitus with hemoglobin (Hgb) A1C ≥10.0%. 4. Untreated clinically significant thromboembolic disease. 5. Previous exposure to GPNMB-targeted therapy. 6. Known or suspected hypersensitivity to any component or excipient contained in the drug formulation of study intervention.

Key dates
Study start date
  • April 2026
Estimated Study Completion Date
  • July 2029
Key endpoints
Primary Outcome Measures
Outcome Measure

Type, incidence and severity of participants with adverse events (AEs)

Measure Description

Type, incidence, severity (as graded by National Cancer Institute Common Terminology Criteria for Adverse Events \[NCI CTCAE\] v 5.0), seriousness, and relatedness of adverse events (AEs).

Time Frame

From the first day through 30-37 days after the last study treatment, up to approximately 1 year

Outcome Measure

Type, incidence, and severity of participants with laboratory abnormalities

Measure Description

Type, incidence, and severity (graded by NCI CTCAE version 5.0) of laboratory abnormalities

Time Frame

From the first day through 30-37 days after the last study treatment, up to approximately 1 year

Outcome Measure

Number of participants with dose modifications

Measure Description

Frequency of dose modifications (eg, dose delay and treatment discontinuations) due to AEs

Time Frame

From the first day through 30-37 days after the last study treatment, up to approximately 1 year

Outcome Measure

Incidence of dose-limiting toxicities (DLTs)

Measure Description

To identify the maximum tolerated dose (MTD) or maximum administered dose (MAD) of PF-08046033

Time Frame

From the first day through 30-37 days after the last study treatment, up to approximately 1 year

Outcome Measure

Recommended dose and schedule of PF-08046033 for expansion (RDE)

Measure Description

RDE will be based on cumulative safety, preliminary antitumor activity and pharmacokinetics findings

Time Frame

Up to 1 year

Primary Outcome Measures table for Clinical Trial
Secondary Outcome Measures:
Outcome Measure

Objective response rate (ORR) using Response Evaluation Criteria in Solid Tumors (RECIST) v1.1 as assessed by investigator

Measure Description

Objective response defined as Complete Response (CR) or Partial Response (PR) per RECIST v1.1, from the date of first dose until the date of the first documentation of PD, death, or start of new anticancer therapy, whichever occurs first.

Time Frame

Up to 3 years

Outcome Measure

Duration of response (DOR) using RECIST v1.1 as assessed by investigator

Measure Description

DOR is defined as the time from first documentation of CR or PR to date of first documentation of PD or death due to any cause.

Time Frame

Up to 3 years

Outcome Measure

Progression-free survival (PFS) using RECIST v1.1 as assessed by investigator

Measure Description

Progression-free survival is defined as the time from the date of randomization to the date of the first documentation of objective progressive disease (PD) assessed by investigator per RECIST 1.1, or death due to any cause, whichever occurs first.

Time Frame

Up to 3 years

Outcome Measure

Overall survival (OS) using RECIST v1.1 as assessed by investigator

Measure Description

Overall survival defined as the time from the date of randomization to the date of death due to any cause.

Time Frame

Up to 3 years

Outcome Measure

Pharmacokinetics (PK): Maximum Observed Concentration (Cmax) of PF-08046033

Measure Description

To characterize the PK of PF-08046033

Time Frame

From Cycle 1 Day 1 (each cycle is 21 days) until End of Treatment, , Up to approximately 1 year

Outcome Measure

PK: Area under the concentration-time curve (AUC) of PF-08046033

Measure Description

To characterize the PK of PF-08046033

Time Frame

From Cycle 1 Day 1 (each cycle is 21 days) until End of Treatment, Up to approximately 1 year

Outcome Measure

PK: Time to Maximum concentration (Tmax) of PF-08046033

Measure Description

To characterize the PK of PF-08046033

Time Frame

From Cycle 1 Day 1 (each cycle is 21 days) until End of Treatment, Up to approximately 1 year

Outcome Measure

PK: Trough concentration (Ctrough) of PF-08046033

Measure Description

To characterize the PK of PF-08046033

Time Frame

From Cycle 1 Day 1 (each cycle is 21 days) until End of Treatment, Up to approximately 1 year

Outcome Measure

PK: Terminal Elimination half-life (t1/2) of PF-08046033

Measure Description

Time Frame

From Cycle 1 Day 1 (each cycle is 21 days) until End of Treatment, Up to approximately 1 year

Outcome Measure

Incidence of antidrug antibodies (ADAs)

Measure Description

To characterize the immunogenicity of PF-08046033

Time Frame

From Cycle 1 Day 1 (each cycle is 21 days) until End of Treatment, Up to approximately 1 year

Outcome Measure

Percent change of immune cells and PD-L1 expression based on immunohistochemistry

Measure Description

To evaluate the pharmacodynamic effects of PF-08046033 in tumor tissue

Time Frame

From Cycle 1 Day 1 (each cycle is 21 days) until End of Treatment, Up to approximately 1 year

Secondary Outcome Measures table for Clinical Trial
Number of participants

250

Collaborators and investigators

Sponsor: Pfizer

Collaborator: None

This information is current as of September 4th 2026.

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For more information, call or email the Pfizer Clinical Trial Contact Center:

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When calling, please reference this study number:

More Information Close NCT# stands for National Clinical Trial number. This is a unique identification code given to each clinical trial registered on ClinicalTrials.gov. The format is "NCT" followed by an 8-digit number (for example, NCT00000419). Also called the ClinicalTrials.gov identifier. NCT07519655