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A Multiple Antigen Vaccine (STEMVAC) for the Treatment of Patients With Stage IV Non-Small Cell Lung Cancer

  • PhasePhase 2
  • StatusRecruiting
  • Planned enrollment40 people
  • Recruiting US sites1
  • SponsorUniversity of Washington
  • RegistryNCT05242965

Recruitment re-checked on ClinicalTrials.gov Oct 30, 2026. Public record; not medical advice.

A Multiple Antigen Vaccine (STEMVAC) for the Treatment of Patients With Stage IV Non-Small Cell Lung Cancer: a one-minute explainerNCT052429651 min

Eligibility

Who can join

The film gives the main points. The full list below is copied from the registry; the study team makes the final decision.

  • Age18 Years to no maximum
  • SexAll
  • Healthy volunteersNo

You may be able to join if

  • Histologically-confirmed diagnosis of stage IV non-squamous or squamous NSCLC.
  • Have measurable disease based on Response Evaluation Criteria in Solid Tumors (RECIST) 1.1 within one month of first vaccine. Target lesions situated in a previously irradiated area are considered measurable if progression has been demonstrated in such lesions.
  • Have completed 3-4 cycles of chemoimmunotherapy, without evidence of progressive disease. Pembrolizumab has to be included in at least 3 of these cycles.
  • Have not received more than 2 cycles of maintenance pembrolizumab and/or pemetrexed and be a candidate for continuation of this therapy.
  • At least 1 site of disease that could be biopsied during treatment. This site should not be a site that is used to determine measurable disease for efficacy purposes. Lesions that will be biopsied should not be on a previously irradiated area unless progression has been demonstrated in such lesions.
  • Patients must be at least 28 days post systemic steroids prior to enrollment, unless this is a steroid administered concurrently with chemotherapy or used as part of prophylaxis to prevent intravenous (IV) contrast reactions.
  • Patients must have Eastern Cooperative Oncology Group (ECOG) Performance Status Score of 0 or 1.
  • Patients must have recovered from major infections and/or surgical procedures, and in the opinion of a principle investigator (PI)/co-PI/study physician/physician extender, not have any significant active concurrent medical illnesses precluding protocol treatment.
  • Willing to undergo up to two serial biopsies while on study.
  • Estimated life expectancy of more than 6 months.
  • White blood cells (WBC) >= 3000/mm^3 (within 60 days of first vaccination).
  • Lymphocyte count >= 800/mm^3 (within 60 days of first vaccination).
  • Platelet count >= 75,000/mm^3 (within 60 days of first vaccination).
  • Hemoglobin (Hgb) >= 9 g/dl (within 60 days of first vaccination).
  • Serum creatinine =< 1.2 mg/dl or creatinine clearance > 50 ml/min (within 60 days of first vaccination).
  • Total bilirubin =< 1.5 mg/dl (within 60 days of first vaccination).
  • Aspartate aminotransferase/serum glutamic oxaloacetic transaminase (AST/SGOT) =< 2 times upper limit of normal (ULN) or SGOT =< 5 times upper limit of normal (ULN) in the presence of liver metastasis (within 60 days of first vaccination).
  • If female of childbearing potential has a negative urine or serum pregnancy test within 72 hours prior to receiving the first dose of study medication.
  • All patients who are having sex that can lead to pregnancy must agree to contraception for the duration of study.
  • Patients must be at least 18 years of age.

You cannot join if

  • Patients with any of the following cardiac conditions:
  • Symptomatic restrictive cardiomyopathy
  • Unstable angina within 4 months prior to enrollment
  • New York Heart Association functional class III-IV heart failure on active treatment
  • Symptomatic pericardial effusion
  • Patients with central nervous system (CNS) metastasis that have not been treated. Patients with previously treated brain metastases may participate provided they are clinically stable for at least 4 weeks and, have no evidence of new or enlarging brain metastases and also are off steroids for 2 weeks prior to dosing with study medication.
  • Patients with any contraindication to receiving recombinant human granulocyte-macrophage colony stimulating factor (rhuGM-CSF) based products.
  • Patients with any clinically significant autoimmune disease that requires active treatment with immunosuppressants. Replacement therapy (e.g., thyroxine, insulin) is not considered a form of systemic treatment. Administration of systemic steroids (i.e., for allergic reactions, computed tomography (CT) scans, or the management of immune related adverse events [irAEs]) is allowed.
  • Has a known history of another prior invasive malignancy within 2 years, except subjects with early stage cancer that has undergone potentially curative therapy with no evidence of that disease recurrence for 2 years since initiation of that therapy.
  • Patients who are simultaneously enrolled in any other treatment study.
  • Patients who are pregnant or breastfeeding.
  • Patients with genetic driver alterations (e.g EGFR, ALK, ROS1, BRAF, MET ex 14, RET) for which targeted treatment exist and are Food and Drug Association (FDA) approved, except if the subject is not eligible or has progressed through those therapies.

The treatment

How it is intended to work

This is how the treatment is meant to work. Whether it helps, and how safe it is, is what this trial is testing.

Treatments listed in the registry

  • CD105/Yb-1/SOX2/CDH3/MDM2-polyepitope Plasmid DNA Vaccine (Biological): Given ID
  • Sargramostim (Biological): Given ID
  • Computed Tomography (Procedure): Undergo CT
  • Biopsy (Procedure): Undergo biopsy
  • Biospecimen Collection (Procedure): Undergo blood sample collection

The study

Treatment groups

Randomized · Sequential · masking: Double

Arm I (STEMVAC, sargramostim) (Experimental)

Patients receive STEMVAC ID and sargramostim ID on day 14 (+3 days) of the 21-day maintenance therapy cycle for a series of 3 vaccine doses and a booster vaccine 9 weeks after the third vaccine dose. Patients also undergo CT and biopsy during screening and on the trial, as well as blood sample collection on trial and during follow-up.

Arm II (sargramostim) (Active Comparator)

Patients receive sargramostim ID on day 14 (+3 days) of the 21-day maintenance therapy cycle for a series of 3 vaccine doses and a booster vaccine 9 weeks after the third vaccine dose. Patients also undergo CT and biopsy during screening and on the trial, as well as blood sample collection on trial and during follow-up.

What it involves

Procedures

As the registry describes them. Requirements to join, such as a tissue sample, are in the eligibility list above even when on-study procedures are optional. Ask the study team which steps apply to you.

  • biopsy: Part of the study plan
  • blood samples: Part of the study plan
  • CT scans: Part of the study plan

Goals

What the study measures

Main goals

  • CD8 is Reported as a Fraction of CD3+ Tumor Infiltrating Lymphocytes (TIL) in 4 High-power Field (HPF) (Baseline and after the third vaccine (at approximately 12 weeks))
  • Number of Participants With Recorded Adverse Event(s) (Up to 20 weeks)

Other goals

  • Magnitude of the Immune Response to CD105/Yb-1/SOX2/CDH3/MDM2-polyepitope Plasmid DNA Vaccine (STEMVAC)
  • Vaccine Induced T-cells Traffic to Tumor
  • Overall Response Rate (ORR)
  • Progression Free Survival (PFS)
  • Overall Survival (OS)
  • T-cell Activation and Type I Lymphocyte Markers

Planned enrollment: 40 (estimated).

Where

Recruiting US sites

  • University of Nebraska Medical Center, Omaha, Nebraska

Site status as of Oct 30, 2026. Check the live record before contacting a site.

Sources

Where this comes from

Registry record reviewed as fetched Oct 30, 2026, last updated by the sponsor Jul 26, 2026. Public record; not medical advice.

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