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Pre-operative IRX-2 in Early Stage Breast Cancer (ESBC)

A Phase Ib Study to Assess the Safety, Tolerability and Immunologic Activity of Preoperative IRX 2 In Early Stage Breast Cancer

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02950259
Enrollment
16
Registered
2016-11-01
Start date
2017-02-09
Completion date
2025-09-25
Last updated
2025-12-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Breast Neoplasm, Breast Neoplasm, Male, Triple Negative Breast Cancer

Keywords

Breast Cancer, Early Stage Breast Cancer, Male breast cancer, IRX-2, Immunotherapy, Triple Negative Breast Cancer

Brief summary

The goal of this study is assess the safety and tolerability of the IRX-2 regimen in patients with early stage breast cancer (ESBC) and to estimate the pathologic complete response rate to neoadjuvant anthracycline-based and non-platinum containing chemotherapy in patients with triple-negative breast cancer who have received the IRX-2 Regimen before chemotherapy.

Detailed description

This will be a Phase Ib study conducted to determine the safety and tolerability of an IRX-2 regimen in ESBC, to be administered pre-operatively before standard-of-care surgical resection and following standard-of-care diagnostic biopsy. This study will also include triple-negative breast cancer patients who will receive the IRX-2 regimen prior to chemotherapy. Eligible subjects will have early stage breast cancer of any receptor sub-type, for which standard-of-care surgical resection is planned. To be eligible, a minimum of 1 core of tumor-bearing biopsy material must be available for research analysis. Cohort B will enroll subjects triple negative breast cancer (defined by ER\<10%, PR\<10%, and HER2-negative by NCCN guidelines), T1c+ tumors for which neoadjuvant anthracycline-based and non-platinum containing chemotherapy is planned. The IRX-2 regimen will be administered and completed preceding chemotherapy. Cohort B subjects must undergo post-IRX-2 Regimen biopsy (2-3 cores), followed by commencement of chemotherapy preferably within one week after biopsy. The IRX-2 regimen will be administered in all enrolled subjects. IRX 2 will be administered by subcutaneous injection into the periareolar skin of the affected breast.

Interventions

DRUGOmeprazole

One tablet of omeprazole daily for 21 days

DIETARY_SUPPLEMENTMultivitamin

Daily multivitamin containing 15-30 mg of zinc for 21 days.

DRUGCyclophosphamide

One dose of cyclophosphamide 300 mg/m2 IV infusion

DRUGIndomethacin

Indomethacin 25 mg three times a day for 21 days

Sponsors

Brooklyn ImmunoTherapeutics, LLC
CollaboratorINDUSTRY
Providence Health & Services
Lead SponsorOTHER

Study design

Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Healthy volunteers
No

Inclusion criteria

* Invasive breast cancer of any receptor subtype diagnosed by core-needle biopsy * To undergo surgical resection with curative intent by partial mastectomy (lumpectomy) or mastectomy or * Triple negative breast cancer (defined by ER\<10%, PR\<10%, and HER2-negative by NCCN guidelines), T1c+ tumors for which neoadjuvant anthracycline-based and non-platinum containing chemotherapy is planned * Tumor \>5 mm in maximum diameter by ultrasound or mammography. (Subjects with smaller tumors may be included at the discretion of the Principal Investigator.) * Willing and able to provide written informed consent, including consent for use of available tissue and required blood draws for research purposes * Availability of at least one tumor-bearing core specimen from the breast cancer diagnostic biopsy * Karnofsky Performance status (KPS) 70% or greater. * Female or male ≥18 years of age on day of signing informed consent. * Adequate organ function as defined by protocol specified lab results

Exclusion criteria

* Prior neoadjuvant systemic therapy is planned * Prior surgery, radiotherapy or chemotherapy for this cancer (other than core-needle biopsy) * Received an investigational agent within 4 weeks of the first dose of treatment. * Diagnosis of immunodeficiency or has received more than replacement doses of corticosteroids any other immunosuppressive therapy within 4 weeks of the first dose of treatment * Hypersensitivity to IRX 2, cyclophosphamide, indomethacin, aspirin or ciprofloxacin. * Chronic anticoagulation, not including aspirin, but including heparins, warfarin, oral anticoagulants or other platelet function inhibitors, that cannot, in the documented opinion of the investigator, safely be interrupted from at least 2 days prior to the initiation of the study regimen until after surgical resection of the tumor. * Another malignancy that required active treatment within 6 months of the first dose of treatment * History or current evidence of any condition, therapy, or laboratory abnormality that might confound the results of the trial, interfere with the subject's participation for the full duration of the trial, such that trial participation is not in the best interest of the subject, including but not limited to uncontrolled hypertension or clinically significant cardiovascular disease, myocardial infarction within the previous 3 months, active infection or pneumonitis or other pulmonary disease requiring systemic therapy, clinically significant gastritis or peptic ulcer disease (that would preclude the use of indomethacin), stroke of other symptoms of cerebral vascular insufficient within the last 3 months, autoimmune disease that has required systemic treatment within the past 2 years (other than hormone replacement doses), or uncontrolled psychiatric or substance abuse disorders. * Pregnancy or lactation. * Known history of Human Immunodeficiency Virus (HIV) (HIV 1/2 antibodies), active Hepatitis B (e.g., HBsAg reactive) or Hepatitis C (e.g., HCV RNA \[qualitative\] is detected).

Design outcomes

Primary

MeasureTime frameDescription
Establish the Safety of the IRX-2 Regimen When Administered Pre-operatively in Early Stage Breast Cancer (ESBC) PatientsDay 1 to Day 26The safety of IRX-2 will be determined by any surgical delays associated with administration of the study regimen.

Secondary

MeasureTime frameDescription
Tumor Infiltrating LymphocytesAt time of pre-surgical biopsy and time of tumor specimen resection at day 26Change in tumor infiltrating lymphocyte (TIL) score as measured by hematoxylin and eosin tumor infiltrating lymphocytes (H&E TIL) count according to Salgado criteria from pre-surgical biopsy to resected tumor specimen

Other

MeasureTime frameDescription
Characterization of Peripheral LymphocytesDay 1 to Day 26Fold change of peripheral lymphocytes including activated T-cells, T-regulatory cells, natural killer (NK) cells, and myeloid cells
TIL PhenotypeDay 1 to 26Post-IRX mean density of T-regulatory cells, activated T-cells, myeloid lineages and dendritic cells post-IRX within stromal tissue compartments.
Intratumoral T-cell Clonality ResponseDay 1-26Change in T-cell clonal responses by T-cell receptor DNA deep sequencing
Intratumoral Immune ResponseDay 1-26The Nanostring PanCancer Immune panel was used to estimate increase in PD-L1 mRNA expression among tumor-bearing FFPE specimens.

Countries

United States

Participant flow

Participants by arm

ArmCount
IRX-2 Regimen -Early Stage Breast Cancer
Enrolled subjects with early stage breast cancer will receive a single dose of cyclophosphamide (300 mg/m2) by IV infusion on Day 1. Also starting on Day 1 and continuing until Day 21, subjects will take daily oral indomethacin (25 mg three times each day), daily oral omeprazole (one tablet) and daily oral multivitamin containing 15-30 mg of zinc. On any 10 consecutive day period between Days 4-17, patients will receive two 1 mL subcutaneous periareolar injections of IRX-2. Cyclophosphamide: One dose of cyclophosphamide 300 mg/m2 IV infusion Indomethacin: Indomethacin 25 mg three times a day for 21 days Omeprazole: One tablet of omeprazole daily for 21 days Multivitamin: Daily multivitamin containing 15-30 mg of zinc for 21 days.
16
IRX-2 Regimen -Triple Negative Breast Cancer
Enrolled subjects with triple negative breast cancer will receive a single dose of cyclophosphamide (300 mg/m2) by IV infusion on Day 1. Also starting on Day 1 and continuing until Day 21, subjects will take daily oral indomethacin (25 mg three times each day), daily oral omeprazole (one tablet) and daily oral multivitamin containing 15-30 mg of zinc. On any 10 consecutive day period between Days 4-17, patients will receive two 1 mL subcutaneous periareolar injections of IRX-2. Cyclophosphamide: One dose of cyclophosphamide 300 mg/m2 IV infusion Indomethacin: Indomethacin 25 mg three times a day for 21 days Omeprazole: One tablet of omeprazole daily for 21 days Multivitamin: Daily multivitamin containing 15-30 mg of zinc for 21 days.
0
Total16

Baseline characteristics

CharacteristicIRX-2 Regimen -Early Stage Breast CancerTotal
Age, Categorical
<=18 years
0 Participants0 Participants
Age, Categorical
>=65 years
4 Participants4 Participants
Age, Categorical
Between 18 and 65 years
12 Participants12 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
1 Participants1 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
14 Participants14 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
1 Participants1 Participants
Family History of Breast/Ovarian Cancer
No
10 Participants10 Participants
Family History of Breast/Ovarian Cancer
Unknown/Not Reported
1 Participants1 Participants
Family History of Breast/Ovarian Cancer
Yes
5 Participants5 Participants
Known BRCA 1/2 Mutation
No
1 Participants1 Participants
Known BRCA 1/2 Mutation
Unknown
12 Participants12 Participants
Known BRCA 1/2 Mutation
Yes
3 Participants3 Participants
Menstrual Status
Post-menopausal
10 Participants10 Participants
Menstrual Status
Premenopausal
6 Participants6 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants
Race (NIH/OMB)
Asian
0 Participants0 Participants
Race (NIH/OMB)
Black or African American
1 Participants1 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants
Race (NIH/OMB)
White
15 Participants15 Participants
Region of Enrollment
United States
16 Participants16 Participants
Sex: Female, Male
Female
16 Participants16 Participants
Sex: Female, Male
Male
0 Participants0 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 160 / 0
other
Total, other adverse events
16 / 160 / 0
serious
Total, serious adverse events
0 / 160 / 0

Outcome results

Primary

Establish the Safety of the IRX-2 Regimen When Administered Pre-operatively in Early Stage Breast Cancer (ESBC) Patients

The safety of IRX-2 will be determined by any surgical delays associated with administration of the study regimen.

Time frame: Day 1 to Day 26

Population: No patients were enrolled into Arm B due to poor accrual and opted against Arm B in favor of the NeoIRX trial.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
IRX-2 Regimen -Early Stage Breast CancerEstablish the Safety of the IRX-2 Regimen When Administered Pre-operatively in Early Stage Breast Cancer (ESBC) Patients0 Participants
IRX-2 Regimen -Triple Negative Breast CancerEstablish the Safety of the IRX-2 Regimen When Administered Pre-operatively in Early Stage Breast Cancer (ESBC) Patients0 Participants
Secondary

Tumor Infiltrating Lymphocytes

Change in tumor infiltrating lymphocyte (TIL) score as measured by hematoxylin and eosin tumor infiltrating lymphocytes (H&E TIL) count according to Salgado criteria from pre-surgical biopsy to resected tumor specimen

Time frame: At time of pre-surgical biopsy and time of tumor specimen resection at day 26

Population: Due to poor patient accrual we opted against enrolling into Cohort B in favor of the neoIRX trial.

ArmMeasureValue (MEDIAN)
IRX-2 Regimen -Early Stage Breast CancerTumor Infiltrating Lymphocytes0.4 percentage of stromal area
Other Pre-specified

Characterization of Peripheral Lymphocytes

Fold change of peripheral lymphocytes including activated T-cells, T-regulatory cells, natural killer (NK) cells, and myeloid cells

Time frame: Day 1 to Day 26

Population: Due to poor accrual we opted against enrolling in Cohort B in favor of the neoIRX trial.

ArmMeasureGroupValue (MEAN)
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesStroma, Any PD-L1: T-Cell (any type)2.01 fold change
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesStroma, Any PD-L1: Helper T-Cell2.05 fold change
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesStroma, Any PD-L1: Cytotoxic T-Cell2.55 fold change
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesStroma, Any PD-L1: Regulatory T-Cell0.91 fold change
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesStroma, Any PD-L1: Macrophage0.86 fold change
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesStroma, PD-L1-positive: T-Cell (any type)3.54 fold change
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesStroma, PD-L1-positive: Helper T-Cell3.58 fold change
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesStroma, PD-L1-positive: Cytotoxic T-Cell2.98 fold change
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesStroma, PD-L1-positive: Regulatory T-cell1.38 fold change
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesStroma, PD-L1-positive: Macrophage1.63 fold change
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesTumor, Any PD-L1: T-Cell (any type)1.07 fold change
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesTumor, Any PD-L1: Helper T-Cell0.77 fold change
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesTumor, Any PD-L1: Cytotoxic T-Cell1.36 fold change
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesTumor, Any PD-L1: Regulatory T-Cell0.79 fold change
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesTumor, Any PD-L1: Macrophage0.65 fold change
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesTumor, PD-L1-positive: T-Cell (any type)1.50 fold change
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesTumor, PD-L1-positive: Helper T-cell1.07 fold change
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesTumor, PD-L1-positive: Cytotoxic T-Cell1.68 fold change
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesTumor, PD-L1-positive: Regulatory T-Cell0.64 fold change
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesTumor, PD-L1-positive: Macrophage0.87 fold change
IRX-2 Regimen -Early Stage Breast CancerCharacterization of Peripheral LymphocytesStoma and tumor, PD-L1-positive: PD-L1+ IC^33.14 fold change
Other Pre-specified

Intratumoral Immune Response

The Nanostring PanCancer Immune panel was used to estimate increase in PD-L1 mRNA expression among tumor-bearing FFPE specimens.

Time frame: Day 1-26

Population: Due to poor patient accrual we opted against enrolling into Cohort B in favor of the neoIRX trial.

ArmMeasureGroupValue (NUMBER)
IRX-2 Regimen -Early Stage Breast CancerIntratumoral Immune ResponsePatient 1.9 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral Immune ResponsePatient 2.6 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral Immune ResponsePatient 30 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral Immune ResponsePatient 4.7 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral Immune ResponsePatient 50 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral Immune ResponsePatient 60 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral Immune ResponsePatient 7.5 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral Immune ResponsePatient 8-.5 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral Immune ResponsePatient 9.5 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral Immune ResponsePatient 101.5 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral Immune ResponsePatient 111.8 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral Immune ResponsePatient 120 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral Immune ResponsePatient 130 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral Immune ResponsePatient 140 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral Immune ResponsePatient 151.6 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral Immune ResponsePatient 16.7 fold change
Other Pre-specified

Intratumoral T-cell Clonality Response

Change in T-cell clonal responses by T-cell receptor DNA deep sequencing

Time frame: Day 1-26

Population: Due to poor patient accrual we opted against enrolling into Cohort B in favor of the neoIRX trial.

ArmMeasureGroupValue (NUMBER)
IRX-2 Regimen -Early Stage Breast CancerIntratumoral T-cell Clonality ResponsePatient 10.7 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral T-cell Clonality ResponsePatient 3-0.3 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral T-cell Clonality ResponsePatient 40.00 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral T-cell Clonality ResponsePatient 50.2 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral T-cell Clonality ResponsePatient 60.0 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral T-cell Clonality ResponsePatient 70.1 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral T-cell Clonality ResponsePatient 80.2 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral T-cell Clonality ResponsePatient 2-0.2 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral T-cell Clonality ResponsePatient 9-0.3 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral T-cell Clonality ResponsePatient 100.2 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral T-cell Clonality ResponsePatient 110.1 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral T-cell Clonality ResponsePatient 12-0.1 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral T-cell Clonality ResponsePatient 13-0.1 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral T-cell Clonality ResponsePatient 14NA fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral T-cell Clonality ResponsePatient 15-0.2 fold change
IRX-2 Regimen -Early Stage Breast CancerIntratumoral T-cell Clonality ResponsePatient 161.5 fold change
Other Pre-specified

TIL Phenotype

Post-IRX mean density of T-regulatory cells, activated T-cells, myeloid lineages and dendritic cells post-IRX within stromal tissue compartments.

Time frame: Day 1 to 26

Population: Due to poor patient accrual we opted against enrolling into Cohort B in favor of the neoIRX trial.

ArmMeasureGroupValue (MEAN)Dispersion
IRX-2 Regimen -Early Stage Breast CancerTIL PhenotypePD-L1-positive: Cytotoxic T-Cell0.19 count/pixelStandard Deviation 0.21
IRX-2 Regimen -Early Stage Breast CancerTIL PhenotypePD-L1-positive: Regulatory T-Cell0.05 count/pixelStandard Deviation 0.05
IRX-2 Regimen -Early Stage Breast CancerTIL PhenotypePD-L1-positive: Macrophage0.14 count/pixelStandard Deviation 0.11
IRX-2 Regimen -Early Stage Breast CancerTIL PhenotypeAny PD-L1: Regulatory T-cell0.07 count/pixelStandard Deviation 0.06
IRX-2 Regimen -Early Stage Breast CancerTIL PhenotypeAny PD-L1: Macrophage0.19 count/pixelStandard Deviation 0.12
IRX-2 Regimen -Early Stage Breast CancerTIL PhenotypePD-L1-positive: T-cell (any type)0.7 count/pixelStandard Deviation 0.59
IRX-2 Regimen -Early Stage Breast CancerTIL PhenotypePD-L1-positive: Helper T-Cell0.47 count/pixelStandard Deviation 0.46
IRX-2 Regimen -Early Stage Breast CancerTIL PhenotypeAny PD-L1: T-cell (any type)1.27 count/pixelStandard Deviation 0.15
IRX-2 Regimen -Early Stage Breast CancerTIL PhenotypeAny PD-L1: Helper T-cell0.79 count/pixelStandard Deviation 0.59
IRX-2 Regimen -Early Stage Breast CancerTIL PhenotypeAny PD-L1: Cytotoxic T-cell0.42 count/pixelStandard Deviation 0.3

Source: ClinicalTrials.gov · Data processed: Feb 24, 2026