Recruiting

Phase 1

DC Vaccine & ChemotherapyDecipHER Trial - DC1 Tx for Early-Stage TNBC and ER Low Positive Breast Cancer

Sponsor:

H. Lee Moffitt Cancer Center and Research Institute

Code:

NCT05504707

Conditions

Triple Negative Breast Cancer

HER2-negative Breast Cancer

Eligibility Criteria

Sex: All

Age: 18+

Healthy Volunteers: Not accepted

Interventions

HER2 - primed Dendritic cells

HER3 - primed Dendritic cells

Study Details

Brief summary:

The purpose of the study is to find out if an investigational vaccine called Dendritic Cell (DC) vaccine given together with standard of care chemotherapy drugs can help people with Triple Negative and HR low positive breast cancer.

Conditions

Triple Negative Breast Cancer

HER2-negative Breast Cancer

Study ID

NCT05504707

Start date

Aug 26, 2022

Status verified date

Feb, 2026

Completion date

Oct, 2026

Anticipated

Primary completion date

Oct, 2026

Anticipated

Eligibility Criteria

Sex: All

Age: 18+

Healthy Volunteers: Not accepted

Inclusion Criteria:

A diagnosis of HER2-negative breast cancer.
Diagnosis of HR negative or HR low positive tumor.
Clinical stage T1c, nodal stage N1-N2 or stage T2-4, nodal stage N0-N2 breast cancer.
Participant must be medically and surgically appropriate to undergo neoadjuvant chemotherapy regimen followed by standard of care local therapy as determined by their treating physician.
Age ≥18 years.
ECOG performance status 0 or 1.
Patients must have normal organ and marrow function, as defined below, within 14 days of registration:
\*Absolute neutrophil count (ANC) ≥ 1500/μL
\*Platelets ≥ 75 000/μL
\*Total bilirubin ≤ 1.5 x institutional ULN, except patients with Gilbert's syndrome in whom total bilirubin must be < 3.0 mg/dL
\*AST/ALT ≤ 3 x institutional ULN
\*Creatinine ≤ 1.5 x institutional ULN
Left ventricular ejection fraction above institutional lower limit of normal (by echocardiogram or MUGA scan).
Female patients of childbearing potential must agree to use dual methods of contraception and have a negative serum pregnancy test at screening. Acceptable methods of contraception are condoms with contraceptive foam, oral, implantable or injectable contraceptives, contraceptive patch, intrauterine device, diaphragm with spermicidal gel, or a sexual partner who is surgically sterilized or post-menopausal. Effective methods of contraception must be used throughout the study and for 5 months following the last dose. To show that women do not have childbearing potential, postmenopausal women must be amenorrheic for at least 12 months naturally (and not because of/following chemotherapy) or patients must be surgically sterile.
Ability to understand and the willingness to sign a written informed consent agreement prior to study registration.

Exclusion Criteria:

Patients who received prior anthracycline-based chemotherapy for the treatment of any cancer.
Patients with inflammatory breast cancer.
Patients must not be receiving any other investigational agents or active antineoplastic therapies.
Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements.
Patients with active autoimmune disease or history of autoimmune disease that might recur, which may affect vital organ function or require immune-suppressive treatment, including chronic prolonged systemic corticosteroid use (defined as corticosteroid use lasting one month or more).
Female patients who are pregnant or nursing.
No other prior malignancy is allowed, except for the following: a. adequately treated basal-cell or squamous-cell skin cancer, b. in situ cervical cancer, c. or any other cancer from which the patient has been disease free for at least 3 years.
History of testing positive for human immunodeficiency virus (HIV) or acquired immunodeficiency syndrome (AIDS).
History of positive test for Hepatitis B or Hepatitis C virus indicating acute or chronic infection.
Patients who have received a live attenuated vaccine ≤ 30 days prior to registration.
Unable to comply with the treatment schedule and study procedures for any reason.
Previously treated with breast cancer-directed vaccine therapies in prior 3 months.
Previously treated with any form HER2- or HER3-primed DC1 therapy.

Study Design

Enrollment

30 participants

Anticipated

Intervention Model

Sequential

Primary purpose

Treatment

Interventions and Outcome Measures

Arms

experimental: Dendritic Cell Vaccine dose Escalation

Dose escalation to determine the maximum tolerated dose (MTD) of HER2- and HER3- primed DC1 study vaccines. Participants will be treated in cohorts of size three to six and the dosage will be escalated if the clinical toxicity is acceptable. A total of 3 dose levels will be used.

Interventions

HER2 - primed Dendritic cells

Dendritic cell will be administered at ultra-sound guided injections. Participants will receive 8 intratumoral injections. These injections will be administered twice per week per week (given 3 days apart). Participants will receive alternating injections (3 days apart) of HER2-primed followed by HER3-primed DCs.

Participants will be treated at the following dose levels:

Dose level 1: HER2 - primed Dendritic cells dose 10-20 million Dose level 2: HER2 - primed Dendritic cells dose 30-50 million Dose level 3: HER2 - primed Dendritic cells dose 80-100 million

HER3 - primed Dendritic cells

Dendritic cell will be administered at ultra-sound guided injections. Participants will receive 8 intratumoral injections. These injections will be administered twice per week per week (given 3 days apart). Participants will receive alternating injections (3 days apart) of HER2-primed followed by HER3-primed DCs.

Participants will be treated at the following dose levels:

Dose level 1: HER3 - primed Dendritic cells dose 10-20 million Dose level 2: HER3 - primed Dendritic cells dose 30-50 million Dose level 3: HER3 - primed Dendritic cells dose 80-100 million

Primary outcome measure

Maximum Tolerated Dose (MTD) [ Time Frame: 4 weeks after start of treatment ]

Central Contacts and Locations

Central contacts

Ricardo Costa

813-745-5051 Ricardo.Costa@moffitt.org

Locations

Moffitt Cancer Center

Recruiting

Tampa, Florida, United States, 33612

Contacts

Shere Wallace-Morrison

813-745-7962 Shere.Wallace-Morrison@moffitt.org

Principal Investigator:

Ricardo Costa, MD, MSc

More Information

Sponsor

H. Lee Moffitt Cancer Center and Research Institute

Last update posted

Feb 5, 2026

Last verified

Feb, 2026

Keywords

Breast Cancer

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-10. This information was provided to ClinicalTrials.gov by H. Lee Moffitt Cancer Center and Research Institute on 2026-02-05.