Calorie Restriction With or Without Metformin in Triple Negative Breast Cancer (BREAKFAST)

January 17, 2023 updated by: Fondazione IRCCS Istituto Nazionale dei Tumori, Milano

Targeting Triple Negative BREAst Cancer Metabolism With a Combination of Chemotherapy and a Diet Mimicking FASTing Plus/Minus Metformin in the Preoperative Setting: the BREAKFAST Trial

Glucose starvation and metformin have synergistic antitumor effects that are mediated through the concomitant inhibition of glycolysis and mitochondrial oxidative phosphorylation. The BREAKFAST trial will evaluate the antitumor activity of combining cyclic fasting-mimicking diet (FMD), which reproduces the in vitro effects of glucose starvation, plus/minus metformin with standard preperative anthracycline-taxane chemotherapy in patients with stage I-III TNBC

Study Overview

Status

Active, not recruiting

Conditions

Intervention / Treatment

Detailed Description

Triple-negative breast cancer (TNBC) is the most aggressive breast cancer subtype, and is associated with the lowest cure rates in the limited-stage disease setting, as well as with the lowest overall survival in the metastatic setting. Preclinical studies indicate that cycles of fasting or calorie-restricted, low-carbohydrate, low-protein diets, also known as fasting-mimicking diets (FMDs), have synergistic cytotoxic effects when combined with chemotherapy agents, such as doxorubicin or cisplatin, in several in vitro and in vivo tumor models, including murine TNBC models. More recently, intermittent fasting has demonstrated highly synergistic antitumor effects when combined with metformin; of note, these effects are mediated through the concomitant inhibition of glycolysis (via fasting-induced hypoglycemia) and metformin-induced inhibition of mitochondrial oxidative phosphorylation (OXPHOS). Finally, small reports published so far indicate that cyclic fasting and FMDs are well tolerated in cancer patients, and can be safety combined with standard antitumor treatments.

Based on these data, the BREAKFAST trial was designed to investigate the antitumor activity of cyclic FMD, alone or in combination with metformin, in patients with localized TNBC. In this study, 90 patients with stage I-III TNBC will be randomized in a 1:1 ratio to receive approximately 6 months of standard preoperative anthracycline plus taxane chemotherapy in combination with eight triweekly cycles of 5-day FMD (Arm A), or the same chemotherapy-FMD regimen plus daily metformin (Arm B). The primary objective of the study is to demonstrate that one or both experimental treatments increase the rate of pCR from 45% (historical data) to 65%

Study Type

Interventional

Enrollment (Actual)

30

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

Study Locations

  • Italy
      • Milano, Italy, 20133
        • Fondazione IRCCS Istituto Nazionale Tumori

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 75 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Female

Description

Inclusion Criteria:

  • Patients eligible for inclusion in this study must meet all of the following criteria:

    1. Female sex
    2. Age ≥ 18 and ≤ 75 years.
    3. Evidence of a personally signed and dated informed consent document (ICD) indicating that the patient has been informed of all pertinent aspects of the study before enrollment
    4. Willingness and ability to comply with the prescribed FMD regimen, metformin intake, the scheduled visits, treatment plans, laboratory tests and other procedures.
    5. Histologically confirmed diagnosis of invasive TNBC candidate to neoadjuvant chemotherapy and subsequent curative surgery. On the basis of International Guidelines, TNBC is defined by absent or minimal (<1%) expression of oestrogen and progesterone receptors at IHC, and absence of HER2 over-expression or amplification, as defined as an IHC score of 0, 1+, or an IHC score of 2+ with in situ hybridization (ISH) analysis excluding HER2 gene amplification.
    6. Patients with localized disease (clinical stage I-III according to TNM). Patients with Stage I TNBC will be included only if the primary tumor is at least 10 mm in greatest dimension (clinical T1c as determined through baseline MRI assessment).
    7. Presence of an Eastern Cooperative Oncology Group (ECOG) performance status 0 or 1.

    8. Presence of adequate bone marrow and organ function as defined by the following laboratory values:

      1. ANC ≥ 1.5 x 103/l
      2. platelets ≥ 100 x 103/l
      3. hemoglobin ≥ 9.0 g/dl
      4. calcium (corrected for serum albumin) within normal limits or ≤ grade 1 according to NCI-CTCAE version 5.0 if not clinically significant
      5. potassium within the normal limits, or corrected with supplements
      6. creatinine < 1.5 ULN
      7. blood uric acid < 10 mg/dl
      8. ALT and AST ≤ 2 x ULN
      9. total bilirubin < 1.5 ULN except for patients with Gilbert syndrome who may only be included if the total bilirubin is < 3.0 x ULN or direct bilirubin < 1.5 x ULN
      10. Fasting glucose ≤ 250 mg/dl.
    9. Female patients of childbearing potential must agree to sexual abstinence or to use two highly effective methods of contraception throughout the study and for at least six months after the end of the FMD. Abstinence is only acceptable if it is in line with the preferred and usual lifestyle of the patient. Examples of contraceptive methods with a failure rate of < 1% per year include tubal ligation, male sterilization, hormonal implants, established, proper use of combined oral or injected hormonal contraceptives, and certain intrauterine devices. Alternatively, two methods (e.g., two barrier methods such as a condom and a cervical cap) may be combined to achieve a failure rate of < 1% per year. Barrier methods must always be supplemented with the use of a spermicide. A patient is of childbearing potential if, in the opinion of the Investigator, she is biologically capable of having children and is sexually active.

    10. Female patients are not of childbearing potential if they meet at least one of the following criteria:

      1. Have undergone a documented hysterectomy and/or bilateral oophorectomy
      2. Have medically confirmed ovarian failure
      3. Achieved post-menopausal status, defined as: ≥ 12 months of non-therapy-induced amenorrhea or surgically sterile (absence of ovaries) and have a serum FSH level within the laboratory's reference range for postmenopausal females.

Exclusion Criteria:

  • Patients eligible for this study must not meet any of the following criteria:

    1. Prior systemic treatment for breast cancer or other malignancies within 5 years of treatment enrollment.
    2. Prior treatment with anthracyclines
    3. Diagnosis of other malignancies in advanced stages (unresectable, locally advanced or metastatic), or that required systemic (neo)adjuvant chemotherapy in the previous 5 years. Other malignancies diagnosed more than 5 years before the diagnosis of breast cancer must have been radically treated without evidence of relapse at the moment of patient enrollment in the trial.
    4. Body mass index (BMI) < 20 kg/m2.
    5. History of alcohol abuse.
    6. Non-intentional weight loss ≥ 5% in the previous 3 months, unless the patient has a BMI > 22 kg/m2 and weight loss has been lower than 10% at the time of enrollment in the study; or non-intentional weight loss of ≥ 10% in the previous 3 months, unless the patients has a BMI > 25 kg/m2 and weight loss has been lower than 15% at the time of the enrollment in the study. In both cases, weight must have been stable for at least one month before study enrollment.
    7. Active pregnancy or breast feeding.
    8. Known active B or C hepatitis or human immunodeficiency virus (HIV) infection, or occasional finding of active hepatitis B/C infection during screening tests before chemotherapy initiation, as defined as positive polymerase chain reaction (PCR) testing for HBV-DNA and HCV-RNA and qualitative PCR for HIV-RNA, or requiring active treatment at study enrollment.
    9. Serious infections in the previous 4 weeks before the FMD initiation, including, but not limited to, potential hospitalizations for complications of infections, bacteriemia or serious pneumonitis.
    10. Active autoimmune diseases requiring systemic treatments (e.g. systemic steroids or immune suppressants).
    11. Active chronic therapy with systemic steroids at a dose ≥ 10 mg per day of prednisone or equivalent at study enrollment.
    12. Known recent diagnosis of hypothyroidism requiring systemic replacement hormonal therapy and without stabilization of hormonal profile (fT3, fT4 and TSH within the normal range).
    13. Diagnosis of type 1 or 2 diabetes mellitus requiring pharmacologic therapy (including, but not limited to, insulin, secretagogues and metformin). A diagnosis of type 2 diabetes mellitus not requiring pharmacological treatments based on the judgment of a diabetologist, is compatible with patient enrollment in the trial.
    14. Active gastric or intestinal ulcerative disease, uncontrolled nausea, vomiting, diarrhea, malabsorption syndrome, small intestine resection.

    15. Anamnesis of clinically significant heart disease including:

      1. angina pectoris, coronary bypass, symptomatic pericarditis, myocardial infarction in the previous 12 months from the beginning of experimental therapy;
      2. congestive heart failure (NYHA III-IV).
    16. Anamnesis of clinically meaningful cardiac arrhythmias, such as ventricular tachycardia, chronic atrial fibrillation, complete bundle branch block, high grade atrio-ventricular block like bi-fascicular block, type II Mobitz and third grade atrio-ventricular block, nodal arrhythmias, supra-ventricular arrhythmia.
    17. Left ventricular ejection fraction lower than 50% at the cardiac scan with radionuclides or at echocardiography.
    18. Previous episodes of symptomatic hypotension leading to loss of consciousness.
    19. Baseline plasma fasting glucose ≤ 60 mg/dL.
    20. Medical or psychiatric comorbidities rendering the patient not candidate to the clinical trial, according to the investigator's judgement.
    21. Other cardiac, liver, lung or renal comorbidities, not specified in the previous inclusion or exclusion criteria, but potentially exposing the patient to a high risk of lactic acidosis.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Chemotherapy plus Fasting-Mimicking Diet (FMD)

Experimental Arm A will consist of 6 months of standard anthracycline-taxane preoperative chemotherapy in combination with triweekly cycles of 5-day FMD.

Chemotherapy will consist of:

  • four triweekly cycles of doxorubicin 60 mg/mq plus cyclophosphamide 600 mg/mq, followed by
  • twelve consecutive cycles of weekly paclitaxel 80 mg/mq

The FMD will consist of a triweekly 5-day regimen of a plant-based, calorie-restricted (600 KCal on day 1; 300 KCal on days 2-5), low-carbohydrate, low-protein diet. The FMD will be repeated up to a maximum of eight consecutive cycles.
Dietary supplement: Fasting-mimicking diet
Cyclic, 5-day, calorie-restricted (600 KCal on day 1; 300 KCal on days 2-5), low-carbohydrate, low protein diet every three weeks
Drug: Preoperative chemotherapy

Chemotherapy will consist of:

  • four triweekly cycles of doxorubicin 60 mg/mq plus cyclophosphamide 600 mg/mq, followed by
  • twelve consecutive cycles of weekly paclitaxel 80 mg/mq
Other Names:
  • doxorubicin+cyclophosphamide and paclitaxel
Experimental: Fasting-mimicking diet plus metformin plus chemotherapy

Experimental Arm B will consist of 6 months of standard anthracycline-taxane preoperative chemotherapy in combination with triweekly cycles of 5-day FMD and daily metformin

Chemotherapy will consist of:

  • four triweekly cycles of doxorubicin 60 mg/mq plus cyclophosphamide 600 mg/mq, followed by
  • twelve consecutive cycles of weekly paclitaxel 80 mg/mq

The FMD will consist of a triweekly 5-day regimen of a plant-based, calorie-restricted (600 KCal on day 1; 300 KCal on days 2-5), low-carbohydrate, low-protein diet. The FMD will be repeated up to a maximum of eight consecutive cycles.

Metformin will be administered at an initial dosage of 850 mg/dya, and then escalated to the maximum dosage of 1700/day (two 850 mg tablets) if well tolerated. Metformin will be interrupted 7 days before surgery.
Dietary supplement: Fasting-mimicking diet
Cyclic, 5-day, calorie-restricted (600 KCal on day 1; 300 KCal on days 2-5), low-carbohydrate, low protein diet every three weeks
Drug: Preoperative chemotherapy

Chemotherapy will consist of:

  • four triweekly cycles of doxorubicin 60 mg/mq plus cyclophosphamide 600 mg/mq, followed by
  • twelve consecutive cycles of weekly paclitaxel 80 mg/mq
Other Names:
  • doxorubicin+cyclophosphamide and paclitaxel
Drug: Metformin
Metformin 850 mg twice a day
Other Names:
  • Metforal

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
pCR rate
Time Frame: 36 months
Rate of pathologic complete responses (pCRs)
36 months

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Severe adverse events
Time Frame: 36 months
Incidence of severe (grade 3 or 4) adverse events according to CTCAE v 5.0
36 months
Safety of the experimental treatments
Time Frame: 36 months
Incidence of treatment-related adverse events (AEs)
36 months
Compliance with the experimental treatment
Time Frame: 36 months
Patients' ability to adhere to the prescribed FMD regimen and pharmacological treatment according to the analysis of daily food diaries and diaries related to metformin intake
36 months
RFS
Time Frame: 60 months
Relapse-free survival
60 months
DMFS
Time Frame: 60 months
Distant metastasis-free survival
60 months
OS
Time Frame: 60 months
Overall Survival
60 months
Short-term modifications of plasma glycemia (mg/dl)
Time Frame: 30 months
Short-term modifications of plasma glucose levels, as defined as changes in peripheral blood venous plasma glucose concentration before and after each FMD cycle
30 months
Long-term modifications of plasma glycemia (mg/dl)
Time Frame: 30 months
Long-term modifications of plasma glucose concentration, as defined as changes in peripheral blood venous plasma glucose concentration measured before consecutive FMD cycles
30 months
Short-term modifications of serum insulin concentration (µU/ml)
Time Frame: 30 months
Short-term modifications of serum insulin concentration, as defined as changes in peripheral blood venous serum insulin concentration before and after each FMD cycle
30 months
Long-term modifications of serum insulin concentration (µU/ml)
Time Frame: 30 months
Long-term modifications of serum insulin concentration, as defined as changes in peripheral blood venous serum insulin concentration measured before consecutive FMD cycles
30 months
Short-term modifications of serum IGF-1 concentration (ng/ml)
Time Frame: 30 months
Short-term modifications of serum IGF-1 concentration, as defined as changes in peripheral blood venous serum IGF-1 concentration before and after each FMD cycle
30 months
Long-term modifications ofserum IGF-1 concentration (ng/ml)
Time Frame: 30 months
Long-term modifications of blood IGF-1 concentration, as defined as changes in serum IGF-1 concentration measured before consecutive FMD cycles
30 months
Short-term modifications of blood lipid profile by UPLC-MS and HPLC-ELDS
Time Frame: 30 months
Short-term modifications of blood lipid profile, as defined as changes in plasma lipids before and after individual FMD cycles
30 months
Long-term modifications of blood lipid profile by UPLC-MS and HPLC-ELDS
Time Frame: 30 months
Long-term modifications of blood lipid profile, as defined as changes in plasma lipids assessed before consecutive FMD cycles
30 months
Clinical tumor response
Time Frame: 30 months
To estimate clinical tumor responses, as assessed through Magnetic Resonance Imaging (MRI) evaluations according to RECIST 1.1 criteria before surgery
30 months
Gene expression profiles
Time Frame: 36 months
To correlate baseline metabolic gene expression, as assessed through RNA-seq analysis, with patient probability to achieve a pCR. In particular, the expression of genes encoding for catalytic, regulatory and scaffolding subunits of PP2A will be evaluated.
36 months
Mutational analyses
Time Frame: 36 months
To correlate mutational tumor profiles, as assessed through whole-genome sequencing analysis, with patient probability to achieve a pCR. In particular, the expression of genes encoding for catalytic, regulatory and scaffolding subunits of PP2A will be evaluated.
36 months
Short-term modifications of plasma amino acid profile by UPLC-QDa Mass detector system (Waters)
Time Frame: 30 months
Short-term modifications of plasma amino acid profile, as defined as changes in plasma amino acids before and after individual FMD cycles
30 months
Long-term modifications of plasma amino acid profile by UPLC-QDa Mass detector system (Waters)
Time Frame: 30 months
Long-term modifications of plasma amino acid profile, as defined as changes in plasma amino acids assessed before consecutive FMD cycles
30 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Fondazione IRCCS Istituto Nazionale dei Tumori, Milano

Collaborators

University of Milan
European Institute of Oncology
IFOM, The FIRC Institute of Molecular Oncology

Investigators

  • Principal Investigator: Filippo de Braud, Professor, Fondazione IRCCS Istituto Nazionale dei Tumori, Milano
  • Principal Investigator: Claudio Vernieri, M.D. PhD, Fondazione IRCCS Istituto Nazionale dei Tumori, Milano

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

May 5, 2020

Primary Completion (Anticipated)

May 1, 2024

Study Completion (Anticipated)

May 1, 2024

Study Registration Dates

First Submitted

January 27, 2020

First Submitted That Met QC Criteria

January 29, 2020

First Posted (Actual)

January 30, 2020

Study Record Updates

Last Update Posted (Actual)

January 18, 2023

Last Update Submitted That Met QC Criteria

January 17, 2023

Last Verified

January 1, 2023

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • INT 192/19
  • 2019-003093-13 (EudraCT Number)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

No

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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