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A Study to Learn About Study Medicine Called PF-08634404 as a Single Treatment and Combination Treatment in Adult Participants With a Liver Cancer Called Hepatocellular Carcinoma, That is Too Advanced to be Removed by Surgery and May Have Spread to Other Parts of the Body.

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Pfizer

Status and phase

Enrolling
Phase 2
Phase 1

Conditions

Carcinoma, Hepatocellular
Liver Neoplasms
Hepatocellular Cancer
Metastatic Hepatocellular Carcinoma
Hepatocellular Carcinoma
Unresectable Hepatocellular Carcinoma
Advanced Hepatocellular Carcinoma

Treatments

Biological: PF-08634404
Biological: Ipilimumab

Study type

Interventional

Funder types

Industry

Identifiers

NCT07227012
C6461013
2025-523525-17-00 (EU Trial (CTIS) Number)
Symbiotic-GI-13 (Other Identifier)

Details and patient eligibility

About

The purpose of this study is to learn about the effects of study medicine (PF-08634404) when given alone or with another antibody (ipilimumab) for the treatment of a type of liver cancer called hepatocellular carcinoma (HCC) that is either locally advanced (spread to nearby tissues) or has spread to other parts of the body.

To join the study, participants must meet the following conditions:

  • Be 18 years or older.
  • Have locally advanced or metastatic HCC.
  • Is not a candidate for complete surgical or loco-regional therapies.
  • Have not received any whole-body treatment for HCC.

Participants will receive PF-08634404 either alone or in combination with ipilimumab. The medicine will be given through intravenous (IV) infusions, which means it will be administered directly into a vein. All treatments will take place at clinical trial sites, where trained medical staff will monitor participants during and after each visit.

Enrollment

138 estimated patients

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion and exclusion criteria

Inclusion Criteria:

  • 18 years of age or older at screening.
  • Locally advanced or metastatic HCC with diagnosis confirmed by histology/cytology or clinically by AASLD criteria (for patients with cirrhosis). Participants without cirrhosis require histological confirmation of diagnosis.
  • Disease that is not amenable to curative surgical and/or locoregional therapies, or progressive disease after surgical and/or locoregional therapies.
  • At least 1 measurable (as defined by RECIST 1.1 per investigator) and untreated lesion.
  • Adequate hepatic, liver, and renal function
  • No prior systemic therapy for HCC.
  • ECOG performance status 0 or 1
  • Child-Pugh Class A

Key Exclusion Criteria:

  • Moderate or severe ascites.
  • History of hepatic encephalopathy.
  • Participants with known active CNS lesions, including leptomeningeal metastasis, brainstem, meningeal, or spinal cord metastases or compression.
  • Clinically significant risk of hemorrhage or fistula.
  • Participants with any history of another malignancy within 3 years.
  • History of allogeneic organ transplantation and allogeneic hematopoietic stem cell transplantation.
  • Participants with active autoimmune diseases requiring systemic treatment within the past 2 years.
  • Clinically significant cardiovascular disease within 6 months prior to the first dose.
  • Major surgery or severe trauma within 4 weeks prior to the first dose or planned major surgery during the study.
  • History of severe bleeding tendency or coagulation dysfunction.
  • History of severe ulcers, unhealed wounds, gastrointestinal perforation, abdominal fistula, gastrointestinal obstruction, intra-abdominal abscess, or acute gastrointestinal bleeding, including bleeding event due to esophageal and/or gastric varices, within 6 months prior to the first dose.
  • Participants with acute, chronic or symptomatic infections.
  • Participants with history of immunodeficiency.

Trial design

Primary purpose

Treatment

Allocation

Randomized

Interventional model

Sequential Assignment

Masking

None (Open label)

138 participants in 2 patient groups

Phase 1b
Experimental group
Description:
Participants will be allocated to sequential dose levels of PF-08634404 and ipilimumab.
Treatment:
Biological: Ipilimumab
Biological: PF-08634404
Phase 2
Experimental group
Description:
Participants will be randomized to receive either PF-08634404 monotherapy or PF-08634404 combined with ipilimumab.
Treatment:
Biological: Ipilimumab
Biological: PF-08634404

Trial contacts and locations

1

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Central trial contact

Pfizer CT.gov Call Center

Data sourced from clinicaltrials.gov

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