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pBI-11 & TA-HPV (With Pembrolizumab as Treatment for Patients w/Advanced, PD-L1 CPS≥1, hrHPV+ Oropharyngeal Cancer

NCT05799144 · Status: RECRUITING · Phase: PHASE2 · Type: INTERVENTIONAL · Enrollment: 54

Last updated 2025-10-22

No results posted yet for this study

Summary

This phase II trial tests how well pB1-11 and human papillomavirus tumor antigen (TA-HPV) vaccines in combination with pembrolizumab work in treating patients with oropharyngeal cancer that has come back (recurrent) or that has spread from where it first started (primary site) to other places in the body (metastatic) and that is PD-L1 and human papillomavirus (HPV) positive. Oropharyngeal cancer is a type of head and neck cancer involving structures in the back of the throat (the oropharynx), such as the non-bony back roof of the mouth (soft palate), sides and back wall of the throat, tonsils, and back third of the tongue. Scientists have found that some strains or types of a virus called HPV can cause oropharyngeal cancer. pBI-11 is a circular deoxyribonucleic acid (DNA) (plasmid) vaccine that promotes antibody, cytotoxic T cell, and protective immune responses. TA-HPV is an investigational recombinant vaccina virus derived from a strain of the vaccina virus which was widely used for smallpox vaccination. Vaccination with this TA-HPV vaccine may stimulate the immune system to mount a cytotoxic T cell response against tumor cells positive for HPV, resulting in decreased tumor growth. Immunotherapy with monoclonal antibodies, such as pembrolizumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread by inhibiting the PD-1 receptor. These investigational vaccines could cause or enhance an immune response in the body against HPV, during which time the activity of pembrolizumab against oropharyngeal cancer associated with HPV may be strengthened. These drugs in combination may be more effective in increasing the ability of the immune system to fight oropharyngeal cancer than pembrolizumab alone.

Conditions

  • Metastatic Oropharyngeal Carcinoma
  • Recurrent Oropharyngeal Carcinoma

Interventions

BIOLOGICAL

DNA Vaccine

Given pBI-11 IM

BIOLOGICAL

Human Papillomavirus Tumor Antigen Vaccine

Given into a muscle

BIOLOGICAL

Pembrolizumab

Given into vein

PROCEDURE

Computed Tomography (CT)

Undergo a CT

PROCEDURE

Magnetic Resonance Imaging (MRI)

Undergo an MRI

PROCEDURE

Magnetic Resonance Imaging

Undergo blood sample collection

PROCEDURE

Biopsy

Undergo tumor biopsy

Sponsors & Collaborators

  • Michael K. Gibson

    lead OTHER

Principal Investigators

  • Michael Gibson, MD, PhD · Vanderbilt University/Ingram Cancer Center

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2023-05-16
Primary Completion
2027-09-30
Completion
2028-09-30
FDA Drug
Yes

Countries

  • United States

Study Locations

More Related Trials

Entities

Drugs

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT05799144 on ClinicalTrials.gov