Adjuvant PROSTVAC-V/F in Subjects at High Risk for Relapse After Radical Prostatectomy

A Phase II Trial of Adjuvant PROSTVAC-V/F in Subjects at High Risk for Relapse After Radical Prostatectomy

The purpose of this study is to see how well PROSTVAC -V/F works in stopping prostate cancer from coming back or relapsing. This study will also look at the safety of PROSTVAC-V/F.

Study Overview

• Status: Terminated
• Conditions: Prostatic Neoplasms
• Intervention / Treatment: Biological: PROSTVAC-V/F

Detailed Description

This study is for adult male patients who have recently undergone radical prostatectomy and are at high risk for relapse. The purpose of this study is to look at the effect PROSTVAC-V/F has in preventing or prolonging relapse after surgery. PROSTVAC-V/F is an investigational drug.

• Study Type: Interventional
• Enrollment (Actual): 33
• Phase: Phase 2

Contacts and Locations

Study Locations

• United States
  • South Carolina
    • Charleston, South Carolina, United States, 29425
      • Medical University of South Carolina

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 21 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Age >21
2. Completed radical prostatectomy for pathologically-verified adenocarcinoma of the prostate no more than 120 days prior to start of treatment. The following procedures are acceptable: radical retropubic prostatectomy (RRP), laparoscopic radical prostatectomy (with or without robotic assistance; LAPD), radical perineal prostatectomy (RPP).
3. Post-operative PSA <0.2ng/mL by 120 days after prostatectomy

4. Must have one or more of the following:

   • pT3b or pT4 primary tumor
   • Gleason score 8-10
   • pN1 lymph node disease
   • positive surgical margins
   • pre-operative PSA of > 10ng/mL
   • presence of any tertiary Gleason 5 component on the prostatectomy pathology report.

   Note: Patients with pT3a disease who lack one of the above criteria, and who refuse adjuvant radiation, may also be enrolled.

5. ECOG performance status 0-1
6. Adequate hematologic, renal, liver function per parameters in Table 1
7. Subject of fathering potential must agree to use an adequate method of contraception to avoid conception throughout the study and for at least 4 weeks after the last dose of study drug to minimize the risk of pregnancy.
8. Subjects must have had a negative bone scan, and CT of abdomen and pelvis within 16 weeks prior to registration. Additional forms of imaging (Prostascint scan, MRI) may be substituted for a CT scan of the abdomen and pelvis if clinically indicated.

Exclusion Criteria:

1. Pure small cell carcinoma of the prostate
2. Radiographically-demonstrable metastases at any time prior to the time of enrollment
3. Diagnosis of cancer requiring systemic therapy in the past 5 years
4. Presence of any major medical condition which, in the opinion of the investigator, precludes participation in the study
5. Neoadjuvant or adjuvant therapy of any kind
6. Chronic administration (defined as daily or every other day for continued use > 14 days) of systemic glucocorticoids within 28 days of the first planned dose of PROSTVAC-V/F. Use of inhaled steroids, nasal sprays, and all topical preparations (creams, solutions, gels, ointments, etc.) for up to 5% of the body surface area is allowed.
7. Use of systemic immunosuppressant agents including anti-metabolites, glucocorticoids, TNF antagonists, antibodies to IL6 or IL6R, calcineurin inhibitors, mTOR antagonists
8. Prior history of serious toxicity or a systemic reaction to vaccinia immunization such as myopericarditis progressive vaccinia infection, or eczema vaccinatum.
9. Inflammatory or exfoliative skin diseases such as eczema, psoriasis that disrupt epidermis
10. Active infections requiring systemic therapy
11. Serologic evidence of HIV/AIDS.
12. Positive hepatitis C serology or active hepatitis B infection.
13. History of allergy to eggs, egg products, aminoglycoside antibiotics
14. History of myocardial disease, such as myocarditis, cardiomyopathy, congestive heart failure, ischemic cardiomyopathy
15. Prior solid organ or stem cell transplant
16. History of or active autoimmune disease (e.g., autoimmune neutropenia, thrombocytopenia, or hemolytic anemia, systemic lupus, localized lupus, Sjogren's syndrome, scleroderma, myasthenia gravis, Goodpasture's syndrome, or Addison's disease). Persons with vitiligo, Hashimoto's thyroiditis, or Graves disease are not excluded.
17. Vaccination with live attenuated vaccine within 28 days prior to day 1 of PROSTVAC-V/F administration or vaccination with a killed vaccine within 14 days prior to day 1 of PROSTVAC-V/F.
18. Inability to avoid close contact or household contact with the following high-risk individuals for three weeks after the Day 1 vaccination or until the vaccination site heals completely: (a) children ≤ 3 years of age; (b) pregnant or nursing women; (c) individuals with prior or concurrent extensive eczema or other eczemoid skin disorders; or (d) immunocompromised individuals, such as those with HIV.
19. Any condition which, in the opinion of the investigator, would prevent full participation in this trial (including Follow-Up), or would interfere with the evaluation of the trial endpoints.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: PROSTVAC-V/F	Biological: PROSTVAC-V/F; 0.5 ml containing at least 2 x 108 Infectious Units (Inf.U) PROSTVAC-V given on day 1. 0.5 ml containing at least 1 x 109 Inf.U PROSTVAC-F given on days 15, 28, 57, 85, 113, 141.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Relapse-Free Survival (RFS) at 2 Years Post-Prostatectomy	RFS is defined as the absence of relapse (PSA ≥ 0.2 ng/mL confirmed >30 days later, radiographic metastasis, initiation of new prostate cancer therapy, or death) at 2 years after prostatectomy. The measure represents the proportion of participants who remain relapse-free at 24 months post-surgery.	2 years

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Comparison of Observed vs. Predicted RFS	A secondary endpoint will be a comparison of the observed RFSs with the predicted ("virtual") RFS for the same patients based on clinical and pathologic information collected at baseline. The observed RFSs of the treated subjects are compared with the predicted RFSs as if the same subjects had not been treated. The comparison is performed using the logrank test of the observed and predicted RFSs. These represent the estimated RFSs for patients with those clinical characteristics if they did not receive any adjuvant therapy.	2 years
Observed Relapse Free Survival (RFS) With the RFSs of a Historical Comparison Group of MUSC Prostatectomy Patients.	No participants were analyzed for this outcome. Although the outcome was pre-specified in the protocol, the study was terminated early and the planned analysis comparing observed relapse-free survival (RFS) to a historical control group could not be completed. Additionally, the analysis population for this outcome was not clearly defined at the time of study closure, and no summary data were generated.	2 years
Associations Between RFS Values and Research Specimen	While most participants were assessed at the scheduled time points, no usable samples due to issues such as hemolysis, insufficient volume, or improper storage conditions rendered them unusable for the planned immunologic assays. No data are available for this outcome measure due to these technical limitations.	2 years

Collaborators and Investigators

• Sponsor: Medical University of South Carolina
• Collaborators: Bavarian Nordic
• Investigators: Principal Investigator: Michael Lilly, MD, Medical University of South Carolina

Study record dates

Study Major Dates

• Study Start (Actual): July 18, 2016
• Primary Completion (Actual): April 29, 2024
• Study Completion (Actual): April 29, 2024

Study Registration Dates

• First Submitted: May 3, 2016
• First Submitted That Met QC Criteria: May 11, 2016
• First Posted (Estimated): May 13, 2016

Study Record Updates

• Last Update Posted (Estimated): December 12, 2025
• Last Update Submitted That Met QC Criteria: November 19, 2025
• Last Verified: November 1, 2025

More Information

Terms related to this study

• Keywords: prostate cancer
• Additional Relevant MeSH Terms: Urogenital Diseases; Genital Diseases; Genital Neoplasms, Male; Urogenital Neoplasms; Neoplasms by Site; Neoplasms; Genital Diseases, Male; Prostatic Diseases; Male Urogenital Diseases; Prostatic Neoplasms
• Other Study ID Numbers: 102377

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO