Medical Information Only. Always consult your healthcare provider before enrolling in any clinical trial.
NCT03206073 · ClinicalTrials.gov registry record · Phase 1
A Phase I/II Study of Pexa-Vec Oncolytic Virus in Combination With Immune Checkpoint Inhibition in Refractory Colorectal Cancer
A Phase 1 study, sponsored by National Cancer Institute (NCI).
- Completed
- Registry status
- Phase 1
- Development phase
- 34
- Enrollment target
NCT03206073: Completed Phase 1 study, sponsored by National Cancer Institute (NCI).
NCT03206073 is a Phase 1 study that has completed, run by National Cancer Institute (NCI). The registered enrollment target is 34 participants, below the 60-participant average among 29,502 other Phase 1 trials with a reported enrollment target (43% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT03206073, a Phase 1 study, has completed, sponsored by National Cancer Institute (NCI).
- COMPLETED
- Registry status
- Phase 1
- Development phase
- 34 participants
- Enrollment target
Study Summary
Background: * Immune-based approaches in colorectal cancer have unfortunately with the notable exception of immune checkpoint inhibition in microsatellite instable (MSI-hi) disease been largely unsuccessful. The reasons for this are unclear but no doubt relate to the fact that in advanced disease colorectal cancer appears to be less immunogenic, as evidenced by the lack of infiltrating lymphocytes with advancing T stage * Pexa-Vec (JX-594) is a thymidine kinase gene-inactivated oncolytic vaccinia virus engineered for the expression of transgenes encoding human granulocyte- macrophage colony-stimulating factor (GM-CSF) and beta-galactosidase. Apart from the direct oncolytic activity, oncolytic viruses such as Pexa-Vec have been shown to mediate tumor cell death via the induction of innate and adaptive immune responses * Tremelimumab is a fully human monoclonal antibody that binds to cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) expressed on the surface of activated T lymphocytes and causes inhibition of B7-CTLA-4-mediated downregulation of T-cell activation. Durvalumab is a human monoclonal antibody directed against programmed death-ligand 1 (PD-L1). * The aim of the study is to evaluate whether the anti-tumor immunity induced by Pexa-Vec oncolytic viral therapy can be enhanced by immune checkpoint inhibition. Objective: -To determine the safety, tolerability and feasibility of Pexa-Vec oncolytic virus in combination with immune checkpoint inhibition in patients with refractory metastatic colorectal cancer. Eligibility: * Histologically confirmed metastatic colorectal cancer. * Patients must have progressed on, been intolerant of or refused prior oxaliplatin- and irinotecan-containing, fluorouracil-based, chemotherapeutic regimen and have disease that is not amenable to potentially curative resection. Patients who have a known Kirsten rat sarcoma viral oncogene homolog (KRAS) wild type tumor must have progressed, been intolerant of or refused cetuximab or
Primary Outcome
Number of participants with Grade 1-5 Adverse events. Grade 1 is mild, Grade 2 is moderate, Grade 3 severe or medically significant, Grade 4 is life-threatening consequences, and Grade 5 is death related to adverse event.
Interventions
- DRUG Durvalumab
- DRUG Tremelimumab
- BIOLOGICAL Pexa-Vec
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 34 participants |
| Start Date | 2017-12-07 |
| Est. Completion | 2022-06-30 |
| Phase | Phase 1 |
What the finished NCT03206073 record still lists
NCT03206073 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 34 participants, a relatively small participant target, below the 60-participant average among 29,502 other Phase 1 trials with a reported enrollment target (43% lower).
The record links to 0 conditions, and to 3 interventions - of which Durvalumab is the first listed.
NCT03206073 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT03206073 about?
NCT03206073 is a clinical study titled "A Phase I/II Study of Pexa-Vec Oncolytic Virus in Combination With Immune Checkpoint Inhibition in Refractory Colorectal Cancer". Background: * Immune-based approaches in colorectal cancer have unfortunately with the notable exception of immune checkpoint inhibition in microsatellite instable (MSI-hi) disease been largely unsuccessful. The reasons for this are unclear but no doubt relate to the fact that in advanced disease c...
What is the current status of trial NCT03206073?
This trial is currently completed. It is a Phase 1 study. The enrollment target is 34 participants. The study started on 2017-12-07. Estimated completion is 2022-06-30.
What interventions are being tested in trial NCT03206073?
The interventions under investigation include: Durvalumab (DRUG), Tremelimumab (DRUG), Pexa-Vec (BIOLOGICAL).
Who is sponsoring clinical trial NCT03206073?
This trial is sponsored by National Cancer Institute (NCI), which has 3,257 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT03206073's enrollment target sits among peer trials
34 1273rd of 2000 higher than 721 of 2,000 other Phase 1 trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other Phase 1 trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
Nationwide trials with similar profiles
Cross-condition peers matched on enrollment target and registry start date, not the same-condition list above.
Similar enrollment target
- NCT02897063 · 34 participants · Phase 1
Effects of Midodrine and Droxidopa on Splanchnic Capacitance in Autonomic Failure
- NCT03906617 · 34 participants · Phase 4
Bupivacaine/Epinephrine +Dexamethasone vs. Liposomal Bupivacaine
- NCT03992378 · 34 participants · NA
Neuromodulation to Regulate Inflammation and Autonomic Imbalance in Sepsis
- NCT04047849 · 34 participants · Phase 4
Latency Antibiotics in Previable PPROM, 18 0/7- 22 6/7 WGA
Similar registry start date
- NCT05962346 · started 2026-12 · NA
Fetal Endoscopic Tracheal Occlusion for Congenital Diaphragmatic Hernia
- NCT07125183 · started 2026-12 · Phase 2
Study on Efficacy and Tolerability of Weekly Doxorubicin in Elderly Patients With Advanced or Metastatic Leiomyosarcoma
- NCT07292298 · started 2026-11 · Phase 2
Phase 2 Single-Arm Rectal Cancer Brachytherapy for Patients With Low-Lying Residual Adenocarcinoma After Total Neoadjuvant Therapy to Improve Organ Preservation Rates
- NCT04263285 · started 2026-10 · NA
Treatment of Depression Post-SCI