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Active, not recruitingNCT03384914Updated Mar 6, 2026

Vaccine to Prevent Recurrence in Patients With HER-2 Positive Breast Cancer

A Phase 2 interventional study of DC1 Vaccine and WOKVAC Vaccine in Breast Cancer Female, Breast Cancer, Male and Breast Cancer Stage I, sponsored by H. Lee Moffitt Cancer Center and Research Institute. Active, not recruiting at 7 sites in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-03-06.

Sponsored by H. Lee Moffitt Cancer Center and Research Institute · Phase 2, Interventional, and Treatment

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Phase
Phase 2
Study type
Interventional
Enrollment
119
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-14

Among 234 studies in Breast Neoplasms, Male with a site in United States — 2 open to participants now, 9 under way, 4 of them phase 3. Breast Neoplasms, Male · United States.

Enrollment
30th of 207
119 · median 34
Started
2018
with 4 others
Phase 2
88 of 234
1 open now
Registered
227th of 234
by date
Lead sponsor
7 of 234
H. Lee Moffitt Cancer Center and Research Institute

Among the 234 studies in Breast Neoplasms, Male with a site in United States, this one is the 30th largest by enrollment of the 207 interventional ones that give a count, is one of 5 that started in 2018, is one of 88 in phase 2, and was the 227th registered.

Breast Neoplasms, Male

286 studies on the registry are indexed under Breast Neoplasms, Male; 5 are open to participants now.

Browse Breast Neoplasms, Male studies →

Open to participants now

2 of the 234 studies in Breast Neoplasms, Male with a site in United States are open now. Recruiting first, the newest first:

All 2 open studies →

A study can be open while its sites in United States have not opened yet or have stopped. Only those recruiting at a site in United States →

Who these studies take

Of the 5 Breast Neoplasms, Male studies recruiting now, 5 set no upper age limit and none stop at 75 or younger; none take children under 18; 1 takes healthy volunteers.

This study: 18 Years and older · all sexes · no healthy volunteers.

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02

Study summary

The main purpose of this study is to evaluate the safety of each study vaccine and to evaluate the effect on the time to disease recurrence (assessed by disease free survival).

Participants will be assigned to receive one of two study vaccines (DC1 study vaccine vs. WOKVAC). The study vaccine will be administered in two phases: a study vaccination phase and a booster phase.

Read the detailed description

The total duration of the study will be 6 years (4 years of patient enrollment and 2 additional years of clinical follow-up). Assessment for disease recurrence and survival will be conducted every 6 months (with a phone call/secure email, medical records or follow up visit) from the end of treatment for a total of 2 years, until the completion of the trial or until documented disease recurrence.

03

Conditions studied

  • Breast Cancer Female
  • Breast Cancer, Male
  • Breast Cancer Stage I
  • Breast Cancer Stage II
  • Breast Cancer Stage III
  • Residual Disease
  • HER2-positive Breast Cancer
  • HER2 Positive Breast Carcinoma

Keywords

  • axillary nodes
  • HER-2 directed treatment
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Clinical stage I-III positive breast cancer treated with chemotherapy including HER-2 directed treatment for at least 12 weeks.
  • Residual invasive carcinoma in the breast or axillary nodes in the final pathology from resected tumor following neoadjuvant chemotherapy.
  • Completed last cycle of cytotoxic chemotherapy (excluding ado-trastuzumab emtansine [T-DM1]) or radiation > 30 days with resolution of all acute toxic effects of prior therapy to grade ≤ 2 (except alopecia)
  • Currently on HER-2 targeted therapy (eg; trastuzumab +/- pertuzumab or T-DM1) per standard of care or has completed HER-2 targeted therapy less than 6 months ago
  • Age ≥ 18 years.
  • Eastern Cooperative Group () performance status 0 or 1.
  • Must have normal organ and marrow function as defined below:

    • (ANC) ≥ 1,000/ μL
    • ≥ 75,000/ μL
    • Total ≤ 1.5 x institutional (ULN), except patients with Gilbert's syndrome in whom total bilirubin must be \<3.0 mg/dL
    • /ALT ≤ 3 x institutional upper limit of normal (ULN)
    • Creatinine ≤ 1.5 x institutional upper limit of normal (ULN)
    • \<6.5%
  • (LVEF) above institutional lower limit of normal (by echocardiogram or MUGA scan within 90 days of registration).
  • Females of must agree to use dual methods of and have a negative serum pregnancy test at screening, and males must use an effective barrier method of contraception if sexually active with a female of child-bearing potential. For both male and female participants, effective methods of contraception must be used throughout the study and for three months following the last dose.
  • Ability to understand and willingness to sign a written document prior to initiation of any screening or study-specific procedures.

Exclusion criteria

Exclusion Criteria:

  • Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, congenital prolonged syndrome, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements.
  • Uncontrolled disease requiring active systemic treatment.
  • Known reaction to the Granulocyte-macrophage colony stimulating factor (GM-CSF) adjuvant; any known to GM-CSF.
  • Pregnant or breast feeding.
  • Known -positive.
  • Known current or a history of or C virus, including chronic and dormant states, unless disease has been treated and confirmed cleared.
  • Major surgery within 4 weeks of initiation of study drug.
  • Current extended use of agents or systemic . Topical, ocular, intra-articular, intranasal, inhalational corticosteroids (with minimal systemic absorption) are allowed. A brief course of corticosteroids for prophylaxis (eg., for contrast dye allergy) or for treatment of non-autoimmune conditions (eg., delayed-type hypersensitivity reaction caused by a contact allergen) is permitted.
  • Potential participant is currently on active treatment in any other clinical protocol or trial that involves administration of experimental therapy and/or therapeutic devices, or investigational drug.
Terms in these criteria, in plain language(22)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

HER2

HER2 is a protein, made from the ERBB2 gene, that drives the growth of some cancers. A study may look for a level of the protein, extra copies of the gene, or a particular change in it.

In breast cancer, protein tests are read as HER2-positive, HER2-low or HER2-negative; other cancers use their own rules. Check which test result the study requires.

Adjuvant and neoadjuvant

Neoadjuvant treatment is given before the main treatment (usually surgery), often to shrink a tumour. Adjuvant treatment is given after it, to lower the chance of the cancer coming back.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

Absolute neutrophil count (ANC)

The number of neutrophils, white blood cells that help fight infection, in a given amount of blood. Too few raises the risk of infection.

It is a count, not a percentage of the white cells. Limits are written in units that mean the same: ≥ 1.5 × 10⁹/L is ≥ 1,500 per mm³ (µL). Each lab has its own reference range.

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

Bilirubin

A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.

Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

HbA1c

A blood test of average blood sugar over the past two to three months, given as a percentage or in mmol/mol. 6.5% (48 mmol/mol) or more is the usual threshold for diabetes, normally confirmed by a second test.

LVEF (left ventricular ejection fraction)

The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

QT and QTc

On an ECG, the QT interval is the time the heart’s lower chambers take to activate electrically and recover in each beat. QTc is that time adjusted for heart rate (QTcF by Fridericia’s formula, QTcB by Bazett’s). Some medicines lengthen it, and a long QTc can raise the risk of a dangerous heart rhythm.

The study may name a correction formula and a limit in milliseconds, often around 450–480.

Autoimmune disease

A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.

Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
119 participants (actual)

Study arms

  • Active comparator
    Dendritic Cell (DC1) Vaccine

    The vaccine will be administered in two phases: a vaccination phase and a booster phase. Approximately 6 months from the initiation of the first vaccine, patients will receive the first of 3 booster vaccines.

    Biological: DC1 Vaccine

  • Active comparator
    pUMVC3-IGFBP2-HER2-IGF1R (WOKVAC)

    The vaccine will be administered in two phases: a vaccination phase and a booster phase. Approximately 6 months from the initiation of the first vaccine, patients will receive the first of 3 booster vaccines.

    Biological: WOKVAC Vaccine

Interventions

  • BiologicalDC1 Vaccine

    Vaccination Phase: DC1 vaccine will be administered weekly via intranodal injection in weeks 1 to 6 (window 8-21days between vaccines). Booster vaccines will be administered at approximately 3 month intervals on months 6, 9 and 12 (with a window +/- 1 month).

    Also known as: Immunotherapy, Dendritic Cell Vaccine

  • BiologicalWOKVAC Vaccine

    Vaccination Phase: WOKVAC vaccine will be administered via intradermal injection on weeks 1, 4 and 7 (window +21 days). Booster vaccines will be administered at approximately 3 month intervals on months 6, 9 and 12 (with a window +/- 1 month).

    Also known as: Immunotherapy, pUMVC3-IGFBP2-HER2-IGF1R

06

What researchers measure

Primary outcomes

  1. Immunogenicity

    The primary immunogenicity outcome for both arms of this trial will be the summation of spots (ELISPOT) for 6 distinct peptides and reported as total SFC/10\^6 cells. A value \>150 defines an immune response.

    Time frame: Up to 3 years

Secondary outcomes

  1. Disease-free Survival (DFS)

    Clinical activity is characterized by disease-free survival (DFS), defined as the time from start of treatment to documented recurrence (any breast event), death due to any cause or last patient contact that documents recurrence-free status (i.e., a clinic or scan date).

    Time frame: Up to 3 years

07

Study locations

7 sites
08

References and documents

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Feb 2018 to primary completion in Dec 2025, 94 months.

Of 20 phase 2 interventional studies under Breast Neoplasms, Male, half reached primary completion within 49 months of starting (the median), counting those still running; a quarter within 25 and three quarters within 75. This study's 94 months is above that.

How these figures are worked out, and which studies are left out of them.

Registered
Dec 20, 2017
First posted
Dec 28, 2017
StartActual
Feb 19, 2018
Primary completionActual
Dec 22, 2025
CompletionEst.
Dec 2027
Last update
Mar 6, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Mar 6, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03384914
Collaborators
United States Department of Defense
Responsible party
Sponsor
First posted
Dec 28, 2017
Start date
Feb 19, 2018
Primary completion
Dec 22, 2025
Completion
Dec 2027 (estimated)
Last update
Mar 6, 2026

Study contacts

Hyo S. Han, M.D.
principal investigator · H. Lee Moffitt Cancer Center and Research Institute

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is active, not recruiting, as verified in Mar 2026. You cannot join it, but the record below documents what was studied.

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Discussion

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Studies of the drug tested here: pUMVC3-IGFBP2-HER2-IGF1R Plasmid DNA Vaccine

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