Study participants with primary breast cancer will receive a standard chemotherapy with an anthracycline and a taxane as well as trastuzumab in case of HER2-positive tumors at doses and duration in concordance to current treatment guidelines. Patients will be receive and benefit in addition currently not in the neoadjuvant setting registered medication as lapatinib or bevacizumab of which significant increases of cure (pCR) rates have been reported in previous phase III studies. Patients randomized to carboplatin will receive in addition to the described backbone therapies a potentially active agent which suggested synergy of efficacy with chemotherapies as well as targeted agents. Patients might have the risk of an increase in toxicities due to the added agents and will have additional burden due to investigations required for study participation. However, due to the severity of the underlying disease and the high risk of relapse and death due to the stage of disease, this increase in toxicity and burden appears less relevant compared to the potential higher efficacy and finally cure rate by the incorporated treatments.
Anthracycline/taxane based combination chemotherapy of at least 18 weeks represents the standard of care in the neoadjuvant setting. In HER2-positive disease trastuzumab is given simultaneously to chemotherapy. Recent data from the Neo-Altto and Neosphere trials suggest that a dual blockage of the HER2 receptor with e.g. trastuzumab and lapatinib reach significantly higher pCR rates than trastuzumab alone and should therefore represent the treatment back-bone of new neoadjuvant trials. A preplanned subgroup analysis of the GeparQuinto study demonstrated that in TNBC the addition of bevacizumab resulted in a significant increase of pCR rates (HR 1.4). Having a better cardiac tolerability profile compared to conventional anthracyclines, the non-pegylated liposomal encapsulated doxorubicin (NPLD) Myocet® might provide the possibility to combine taxane, anthracycline, platinum salt as well with targeted agents as double HER2 blockage or bevacizumab.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
595
Carboplatin, AUC, 2 min/mL weekly, infusion
background treatment according to standards fpr triple negative and Her2pos breast cancer patients Paclitaxel: 80 mg/m² i.v. given weekly on day 1 q day 8 for 18 weeks. NPLD (Myocet®): 20 mg/m² weekly on day 1 q day 8 for 18 weeks Trastuzumab (only for HER2-positive patients): Loading dose: 8 mg/kg, Maintenance dose: 6 mg/kg, day 1 q day 22 for 6 cycles. Post-surgery: up to a total duration of 1 year according to current AGO guidelines Lapatinib 750 mg/day p.o. continuously for 18 weeks; in case of good tolerability (no CTC grade II toxicity except alopecia and nausea/vomiting) during the first cycle the dose may be escalated to 1000 mg. Bevacizumab: 15 mg/kg i.v., day 1 q day 22 for 6 cycles (only in TNBC patients).
Praxis Dr. Heinrich
Fürstenwalde, Brandenburg, Germany
Luisenkrankenhaus
Düsseldorf, North Rhine-Westphalia, Germany
NCT Heidelberg
Heidelberg, Germany
Pathological complete response of breast and lymph nodes (ypT0 ypN0; primary endpoint)
Pathological response will be assessed considering all removed breast and lymphatic tissues from all surgeries. Surgery takes place shortly after the 18 weeks (six 3-week cycles) chemotherapy treatment. No microscopic evidence of residual viable tumor cells in all resected specimens of the breast and axilla meets the primary endpoint.
Time frame: 24 weeks (time window -3 weeks)
1.ypT0/is ypN0; ypT0; ypT0/is; ypN0, and regression grades
Time frame: 24 weeks (time window -3 weeks)
Clinical and imaging response
To determine the response rates of the breast tumor and axillary nodes based on physical examination and imaging tests. (sonography, mammography, or MRI) after treatment in both arms.
Time frame: 24 weeks (time window -3 weeks)
loco-regional invasive recurrence free survival (LRRFS), regional recurrence free survival (RRFS), local recurrence free survival (LRFS), distant-disease- free survival (DDFS), invasive disease-free survival (IDFS), and overall survival (OS)
LRRFS, RRFS, LRFS, DDFS, IDFS and OS are defined as the time period between registration and first event and will be analyzed after the end of the study by referring to data from GBG patient's registry.
Time frame: 5 years
Tolerability and Safety
Tolerability and Safety: Descriptive statistics for the 4 treatments will be given on the number of patients whose treatment had to be reduced, delayed or permanently stopped
Time frame: during treatment 18 weeks
pCR rates per arm
• To assess the pCR rates per arm separately in patients with triple-negative tumors and HER2-positive tumors.
Time frame: 24 weeks (time window -3 weeks)
Breast and axilla conservation rate
To determine the breast and axilla conservation rate after each treatment.
Time frame: 24 weeks (time window -3 weeks)
pCR rate and local recurrence free survival in correlation to clinical complete response and negative core biopsy before surgery
To determine the pCR rate and local recurrence free survival (LRFS) in patients with a clinical complete response (cCR) and a negative core biopsy before surgery.
Time frame: 5 years
Clinical and imaging response
To determine the response rates of the breast tumor and axillary nodes based on physical examination and imaging tests. (sonography, mammography, or MRI) after treatment in both arms.
Time frame: 6 weeks
PCR rate in patients with a clinical complete response and a negative core biopsy
To assess the pCR rate in patients with a clinical complete response and a negative core biopsy before surgery.
Time frame: 24 weeks (time window -3 weeks)
Regional recurrence free survival (RRFS)in patients with initial node-positive axilla
To assess regional recurrence free survival (RRFS) in patients with initial node-positive axilla converted to negative at surgery and treated with sentinel node biopsy alone.
Time frame: until event occurs - no events for cured patients
Examination and comparison of molecular markers
To examine and compare pre-specified molecular markers such as BRCA1-mRNA, P53, ALDH1, p4E-BP1, IL-8 metagene, B-Cell metagene as well as exploratory analyses and lymphocyte infiltration on core biopsies before and surgical tissue after end of chemotherapy. The aim is to identify potential predictive short and long term parameters.
Time frame: Baseline, 6 weeks and 24 weeks
CTC Substudy
To assess, characterize, and correlate circulating tumor cells and proteins with the effect of treatment.
Time frame: Baseline, 6 weeks and 24 weeks
Pharmacogenetic substudy
To correlate Single Nucleotide Polymorphisms (SNPs) of genes with the associated toxicity and histologically assessed treatment effect.
Time frame: Baseline
Ovarian Substudy
To assess ovarian function measured by amenorrhea rate in correlation with changes in E2, FSH, Anti-Müller Hormone, ultrasound-follicle count in patients aged \<45 years.
Time frame: Baseline, 6 months, 12 months, 18 months, 24 months, 30 months
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