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Updated May 2026 · ClinicalTrials.gov

RECRUITINGPhase 1INTERVENTIONAL

A Study of VET3-TGI in Patients With Solid Tumors

A Phase 1/1b Study of VET3-TGI Administered Alone and in Combination With Atezolizumab in Patients With Advanced Solid Tumors

A Study of VET3-TGI in Patients With Solid Tumors (NCT06444815) is a Phase 1 interventional studying Solid Tumor, Adult and Microsatellite Stable Colorectal Cancer, sponsored by KaliVir Immunotherapeutics. RECRUITING as of the most recent ClinicalTrials.gov update. Talk to your doctor before contacting the trial site.

Important: This information is not medical advice. Talk to your doctor about whether a clinical trial is right for you.

About This Trial

VET3-TGI is an oncolytic immunotherapy designed to treat advanced cancers. VET3-TGI has not been given to human patients yet, and the current study is designed to find a safe and effective dose of VET3-TGI when administered by direct injection into tumor(s) (called an intratumoral injection) or when given intravenously (into the vein) both alone and in combination with atezolizumab in patients with solid tumors (STEALTH-001).

What Stage of Research Is This?

Phase 1 trials test a new treatment for the first time in humans, focusing on safety, dosing, and how the body processes the drug. For Solid Tumor, Adult, a Phase 1 study typically enrolls a small number of participants — often healthy volunteers or patients who have exhausted standard treatment options. Phase 1 results determine whether a treatment moves into larger Phase 2 efficacy studies.

This trial is currently recruiting participants. The sponsor has registered the study with ClinicalTrials.gov as actively enrolling, which means new applicants who meet the eligibility criteria can be considered for screening. Trial status can change between updates — confirm current recruiting status with the study contact before traveling for a screening visit.

Target enrollment of 60 participants puts this in the typical range for a Phase 2-style efficacy study or a moderate Phase 3 trial in a focused Solid Tumor, Adult subpopulation. At this scale, the study has enough statistical power to detect a clear treatment effect but is not the largest cohort in the field.

Who May Be Eligible (Plain English)

Key Who May Qualify: - Have pathologically confirmed, advanced, unresectable, or metastatic solid tumors. Preferred indications include, but are not limited to, breast carcinoma, bladder carcinoma, cervical squamous carcinoma, colorectal carcinoma, esophageal carcinoma, head and neck squamous carcinoma, renal cell carcinoma, ovarian carcinoma, sarcoma, thymoma, and uterine carcinoma. - Failed, intolerant to, or refused potentially curative treatment options, including but not limited to, standard of care molecularly targeted agents, immunotherapy (e.g., anti -pembrolizumab/PDL1 antibodies), and chemotherapy - Measurable disease as per RECIST 1.1 criteria - At least one tumor amenable to safe ITu injections and/or biopsies - You should be able to carry out daily activities with 0 level of ability (ECOG 0) or 1 - Demonstrate your organs (liver, kidneys, etc.) are working well enough based on blood tests - Must be willing to comply with all protocol procedures and adhere to post-treatment care instructions Additional Inclusion criteria exist Key Who Should NOT Join This Trial: - previous cancer treatment that works throughout the body (like chemotherapy) washout (dependent upon the therapy) - Requires use of anti-platelet or anti-coagulant therapy that cannot be safely suspended for per protocol biopsies or intra-tumoral injections. - cancer that has spread to the brain and/or carcinomatous meningitis that have not been completely resected or completely irradiated. - Prior history of myocarditis - Known HIV/AIDS, active HBV or HCV infection. - Receiving high dose immunosuppressive medication or has a significant weakened immune system (e.g. transplant recipient, etc). Additional Exclusion criteria exist Always talk to your doctor about whether this trial is right for you.

These are translations of the protocol\'s inclusion and exclusion criteria, simplified for patients and caregivers. The original clinical text appears below. Eligibility is ultimately confirmed by the trial site\'s screening process — this summary is a starting point for a conversation with your doctor, not a final determination.

Original Eligibility Criteria

View original clinical language
Key Inclusion Criteria: * Have pathologically confirmed, advanced, unresectable, or metastatic solid tumors. Preferred indications include, but are not limited to, breast carcinoma, bladder carcinoma, cervical squamous carcinoma, colorectal carcinoma, esophageal carcinoma, head and neck squamous carcinoma, renal cell carcinoma, ovarian carcinoma, sarcoma, thymoma, and uterine carcinoma. * Failed, intolerant to, or refused potentially curative treatment options, including but not limited to, standard of care molecularly targeted agents, immunotherapy (e.g., anti -pembrolizumab/PDL1 antibodies), and chemotherapy * Measurable disease as per RECIST 1.1 criteria * At least one tumor amenable to safe ITu injections and/or biopsies * ECOG performance status 0 or 1 * Demonstrate adequate organ function * Must be willing to comply with all protocol procedures and adhere to post-treatment care instructions Additional Inclusion criteria exist Key Exclusion Criteria: * Prior systemic therapy washout (dependent upon the therapy) * Requires use of anti-platelet or anti-coagulant therapy that cannot be safely suspended for per protocol biopsies or intra-tumoral injections. * CNS metastases and/or carcinomatous meningitis that have not been completely resected or completely irradiated. * Prior history of myocarditis * Known HIV/AIDS, active HBV or HCV infection. * Receiving high dose immunosuppressive medication or has a significant immunodeficiency (e.g. transplant recipient, etc). Additional Exclusion criteria exist

Treatments Being Tested

DRUG

VET3-TGI

Oncolytic vaccinia virus engineered with immunomodulatory transgenes

DRUG

Atezolizumab

anti-pd-L1 antibody

Locations (7)

Trial sites listed on ClinicalTrials.gov for this study. Site activation status can vary — confirm with the specific site before traveling for a screening visit.

USC/Norris Comprehensive Cancer Center
Los Angeles, California, United States
UC Irvine Health
Orange, California, United States
University of Miami
Miami, Florida, United States
Community Health Network
Indianapolis, Indiana, United States
UPMC- Hillman Cancer Center
Pittsburgh, Pennsylvania, United States
Mary Crowley Cancer Research
Dallas, Texas, United States
University of Texas MD Anderson Cancer Center
Houston, Texas, United States

How to Talk to Your Doctor About This Trial

Bring the printable summary of this trial — including the NCT ID (NCT06444815), the sponsor (KaliVir Immunotherapeutics), and the key eligibility criteria — to your next appointment. Your doctor can review the inclusion and exclusion criteria against your medical history, lab values, and current treatments to assess whether you are likely to qualify. They can also help you weigh whether trial participation makes sense alongside your existing care plan.

Useful questions to walk through together: What does the trial protocol require beyond standard care? How long is the active treatment phase, and how long is follow-up? Are there study visits at sites I can reach? Who pays for the trial-specific procedures, and who pays for standard-of-care portions? See our 25 questions to ask about clinical trials guide for a more complete checklist.

Authoritative Sources

The official record for this trial lives on ClinicalTrials.gov — the federal registry maintained by the National Library of Medicine at NIH. For background on how this trial fits into the FDA approval pathway, see the FDA drug approval process. For oncology-specific guidance for patients considering trials, the National Cancer Institute publishes patient-oriented overviews. International trial registries are aggregated by the WHO ICTRP.

Frequently Asked Questions

What is the NCT06444815 clinical trial studying?

VET3-TGI is an oncolytic immunotherapy designed to treat advanced cancers. VET3-TGI has not been given to human patients yet, and the current study is designed to find a safe and effective dose of VET3-TGI when administered by direct injection into tumor(s) (called an intratumoral injection) or when given intravenously (into the vein) both alone and in combination with atezolizumab in patients with solid tumors (STEALTH-001). The full protocol is registered on ClinicalTrials.gov and includes the primary outcome measures, eligibility criteria, and study endpoints.

Who can participate in NCT06444815?

Eligibility for this trial depends on the specific inclusion and exclusion criteria set by the sponsor. The plain-English summary above translates the most important criteria into accessible language; the official clinical text is preserved in the collapsible section underneath. Whether you fit any specific trial is a medical decision your doctor needs to confirm — bring the trial information to your treating physician for a full review against your medical history.

How do I contact the trial site for NCT06444815?

Contact information registered with ClinicalTrials.gov is shown in the sidebar of this page. Before reaching out, confirm with your treating physician that this trial is appropriate for your situation. The trial site will then walk you through the screening process to determine final eligibility.

Is participating in a clinical trial safe?

Clinical trials in the United States are regulated by the FDA and overseen by Institutional Review Boards (IRBs) that review the protocol for safety. Risk varies by trial — Phase 1 studies test new treatments in humans for the first time, while Phase 3 trials use treatments that have already passed earlier safety screening. The informed consent document for any specific trial details the known risks and what to expect. Discuss those risks with your physician before deciding whether to participate.

Where can I verify the data on this page?

Every detail on this page comes directly from the ClinicalTrials.gov API. Click "View on ClinicalTrials.gov" in the sidebar to see the official, unmodified record. The federal record is always authoritative; this page is a structured presentation with a plain-English eligibility translation. For background on how clinical trials are regulated, see the FDA drug approval process documentation.

How This Page Is Built

Every field on this page is pulled directly from the ClinicalTrials.gov API v2 — no estimates, no proxies. The plain-English eligibility translation is generated from the original protocol text and reviewed for fidelity to the underlying clinical criteria. The original clinical text remains visible in the collapsible section above so users and clinicians can verify the translation. Read the full methodology for the data pipeline and known limitations.

Source: ClinicalTrials.gov API v2 record for NCT06444815. Maintained by the National Library of Medicine at NIH. Public domain. Cite as: "TrialFinderData. NCT06444815. Data: ClinicalTrials.gov."

Medical disclaimer: This page is informational, not medical advice. Talk to your doctor about whether a clinical trial is right for you.

Last updated 2026-05-08 · Data from ClinicalTrials.gov.