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Active Not RecruitingNCT04111172

A Vaccine (Ad5.F35-hGCC-PADRE) for the Treatment of Gastrointestinal Adenocarcinoma

A Phase 2A, Dose-Finding Study of Ad5.F35-hGCC-PADRE Vaccine in Adults With Gastrointestinal Adenocarcinomas at Risk of Relapse Post Definitive Surgery and Standard Therapy

Status
Active Not Recruiting
Phase
Phase 2
Study type
Interventional
Enrollment
48 (actual)
Sponsor
Thomas Jefferson University · Academic / Other
Sex
All
Age
18 Years
Healthy volunteers
Not accepted

Summary

This phase IIA trial investigates the side effects of Ad5.F35-hGCC-PADRE vaccine and to see how well it works in treating patients with gastrointestinal adenocarcinoma. Ad5.F35-hGCC-PADRE vaccine may help to train the patient's own immune system to identify and kill tumor cells and prevent it from coming back.

Detailed description

PRIMARY OBJECTIVES: I. Evaluate the safety and tolerability of sequential adenovirus 5/F35-human guanylyl cyclase C-PADRE (Ad5.F35-hGCC-PADRE), delivered intramuscularly three times at three dose levels in subjects with high-risk colorectal, pancreatic, gastric, or esophageal adenocarcinomas with no evidence of disease (NED) after surgery and standard therapy. II. Evaluate the cellular (T-cell) responses to Ad5.F35-hGCC-PADRE at three different dose levels (10\^11, 10\^12, and 5 x 10\^12 vp) administered intramuscularly three times, four weeks apart in subjects with high-risk colorectal, pancreatic, gastric, or esophageal cancer with NED after surgery and standard therapy. EXPLORATORY OBJECTIVES: I. Evaluate the humoral immunologic response to guanylyl cyclase C (GCC), defined as an incremental or sustained antibody (pan-Ig) response, measured at weeks 5, 9, and 13 following the first vaccination (week 1). II. Evaluate the relationship between immunological responses to GCC and 1) neutralizing antibodies to Ad5 and Ad5.F35 and 2) GCC protein expression in tumors to assess immune tolerance. III. Evaluate disease free survival (DFS) and overall survival (OS), where feasible. OUTLINE: Patients are randomized to 1 of 3 arms. ARM A: Patients receive low dose Ad5.F35-hGCC-PADRE vaccine intramuscularly (IM) on day 1 of weeks 1, 5, and 9 in the absence of disease progression or unacceptable toxicity. ARM B: Patients receive medium dose Ad5.F35-hGCC-PADRE vaccine IM on day 1 of weeks 1, 5, and 9 in the absence of disease progression or unacceptable toxicity. ARM C: Patients receive high dose Ad5.F35-hGCC-PADRE vaccine IM on day 1 of weeks 1, 5, and 9 in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up at 28 days, and then every 3 months for at least 24 months.

Conditions

Interventions

TypeNameDescription
BIOLOGICALAdenovirus 5/F35-Human Guanylyl Cyclase C-PADREGiven as intramuscular injection

Timeline

Start date
2020-11-10
Primary completion
2026-03-01
Completion
2027-03-01
First posted
2019-10-01
Last updated
2025-08-22

Locations

1 site across 1 country: United States

Regulatory

Source: ClinicalTrials.gov record NCT04111172. Inclusion in this directory is not an endorsement.