Current partner codePEPTIDESDE
NCT02624973·Phase 2·INTERVENTIONAL

PErsonalized TREatment of High-risk MAmmary Cancer - the PETREMAC Trial

Status

Active, not recruiting

Phase

Phase 2

Enrollment

200

Locations

7

Results

Not posted

Publications

4

Study summary

What the protocol is testing.

Breast cancer is an optimal "model disease" for studying personalized medicine. Breast cancer was the first malignancy for which a predictive factor forecasting response to therapy was identified nearly 50 years ago; the expression of the estrogen receptor (ER). Furthermore, breast cancer is by far the malignancy in which prognostic and predictive factors have been most extensively studied. Primary medical treatment (pre-surgical medical therapy) offers a unique setting to explore predictive factors due to the fact that primary breast cancers are easily accessible to repeated tissue sampling and evaluation of therapy response both clinically and radiologically. For many years, the investigators have studied predictive factors in primary medical treatment of breast cancer. In the present project, the investigators will implement a new trial concept where the current knowledge from previous trials with respect to predictive markers (hormone receptors, HER2; TP53, CHEK2 and RB1), will be combined with massive parallel sequencing (MPS). Thereby, the investigators aim to design the "next-generation" primary medical treatment where 1) therapy regimens are individualized based on a limited number of known predictive factors and, 2) MPS is used to explore additional predictive factors and their co-regulators in order to fully identify the mechanisms of drug sensitivity / resistance across individual tumours and pave the way for further personalized breast cancer therapy in the future. As for the new era of "genomic medicine", the current trial concept will allow individual tumours to be characterized by their unique gene mutation / epigenetic modification profile upfront, to allocate patients to their optimal personalized medicine as compared to "classical" drug testing through phase II/III trials.

Interventions

Treatment arms and agents.

DRUG

Neoadjuvant tamoxifen + goserelin (premenopausal women)

DRUG

Neoadjuvant letrozole (postmenopausal women)

DRUG

Neoadjuvant endocrine therapy + palbociclib (if lack of response to endocrine therapy alone)

DRUG

Neoadjuvant docetaxel + cyclophosphamide

DRUG

Neoadjuvant docetaxel

DRUG

Neoadjuvant docetaxel + trastuzumab + pertuzumab

DRUG

Neoadjuvant docetaxel + cyclophosphamide + trastuzumab + pertuzumab

DRUG

Neoadjuvant olaparib

DRUG

Neoadjuvant cyclophosphamide (after 10 weeks of olaparib alone)

PROCEDURE

Breast conserving surgery or mastectomy + SNB/axillary dissection

After response to neoadjuvant treatment

RADIATION

Postoperative radiotherapy breast/chest wall + regional lymph nodes

DRUG

Adjuvant trastuzumab

Timeline

From registration to results.

  1. First posted

    Dec 9, 2015

  2. Study start

    Apr 15, 2016

  3. Primary completion

    Jun 1, 2020

  4. Study completion

    Jun 2030

  5. Results posted

    Not reported

  6. Registry updated

    Feb 12, 2026

Outcomes

What the study measures.

Primary outcomes

Predictive and prognostic value of mutations in 300 cancer-related genes assessed in breast cancer tissue by next generation sequencing before starting neoadjuvant therapy.

Time frame · Ten years

Primary endpoint

Secondary outcomes

To assess genetic/epigenetic changes within the tumor tissue during therapy

Time frame · Before vs. 16-24 wks after treatment start. Four years: summary of all patients treated.

Secondary endpoint

The objective response rate (ORR) of personalized medicine, compared to ORR for best standard-of-care using historical data for comparison

Time frame · Four years

Secondary endpoint

Tumor Ki67 reduction after 2 and 5 weeks of treatment in Arm A

Time frame · Assessment for each patient after 2 and 5 weeks of treatment. Four years - summary of all patients in arm A.

Secondary endpoint

To estimate recurrence-free and overall survival when patients are treated with the optimal personalized treatment available as of 2015, using historical data for comparison

Time frame · Ten years

Secondary endpoint

To evaluate the percentage of patients completing neoadjuvant treatment and completing surgery

Time frame · Four years

Secondary endpoint

Breast conserving surgery rate (potential to avoid mastectomy)

Time frame · Four years

Secondary endpoint

Number of participants with treatment-related adverse events as assessed by CTCAE v4.0

Time frame · Ten years

Secondary endpoint

Eligibility

Who can take part.

Minimum age
18 Years
Maximum age
Not reported
Sex
ALL
Healthy volunteers
No

Inclusion Criteria: * Previously untreated, histologically confirmed non-inflammatory breast cancer, \>4 cm in diameter and /or metastatic ipsilateral axillary deposits for which the smallest diameter of the largest node \>2 cm by CT or ultrasound scan. * WHO performance status 0-1 * Known tumor ER, PGR, HER2 and TP53 status. * Known tumor Ki67 percentage (if ER/PGR\>50% and TP53 wt status). * Distant metastasis not suspected. Patients will undergo radiology exams during screening phase, after signing the informed consent. * Age \>18 years * Patients must have clinically and/or radiographically documented measurable breast cancer according to RECIST. * Radiology studies (CT thorax/abdomen and bone scintigraphy/bone scan) must be performed within 28 days prior to registration. * Absence of any psychological, familial, sociological or geographical condition potentially hampering compliance with the study protocol and follow-up schedule; those conditions should be discussed with the patient before registration in the trial * Before patient registration/randomization, written informed consent must be given according to national and local regulations. * For arms B-H: * Neutrophils \> 1.5 x 109/L * Platelets \> 100 x 109/L * Bilirubin \< 2 x upper limit normal (ULN). For patients with Gilbert´s syndrome bilirubin \>2 x ULN is accepted if there is no evidence of biliary obstruction. * Serum creatinine \< 1.5 x ULN * ALT and Alk Phos (ALP) \<2.5 x ULN * INR \< 1.5 Exclusion Criteria: * Unstable angina pectoris or heart failure * Other co-morbidity that, based on the assessment of the treating physician, may preclude the use of chemotherapy at actual doses. * Pregnant or lactating patients can not be included. * Clinical evidence of serious coagulopathy. Prior arterial/venous thrombosis or embolism does not exclude patients from inclusion, unless patient is considered unfit by study oncologist. * Patient not able to give an informed consent or comply with study regulations as deemed by study investigator. * Active cystitis (to be treated upfront) * Active bacterial infections * Urinary obstruction

Study locations

7 registered sites.

Norway. Showing up to 24 locations stored in the fast local snapshot.

Akershus University Hospital

Lørenskog, Akershus, Norway

Haukeland University Hospital

Bergen, Hordaland, Norway

Helse Fonna

Haugesund, Rogaland, Norway

Helse Stavanger

Stavanger, Rogaland, Norway

Helse Førde

Førde, Sogn Og Fjordande, Norway

St. Olavs Hospital

Trondheim, Sør Trøndelag, Norway

Helse Nord/UNN

Tromsø, Troms, Norway

Publications

Results and literature.

PMID 33242536Eikesdal HP, Yndestad S, Elzawahry A, Llop-Guevara A, Gilje B, Blix ES, Espelid H, Lundgren S, Geisler J, Vagstad G, Venizelos A, Minsaas L, Leirvaag B, Gudlaugsson EG, Vintermyr OK, Aase HS, Aas T, Balmana J, Serra V, Janssen EAM, Knappskog S, Lonning PE. Olaparib monotherapy as primary treatment in unselected triple negative breast cancer. Ann Oncol. 2021 Feb;32(2):240-249. doi: 10.1016/j.annonc.2020.11.009. Epub 2020 Nov 24.PMID 38039432Yndestad S, Engebrethsen C, Herencia-Ropero A, Nikolaienko O, Vintermyr OK, Lillestol RK, Minsaas L, Leirvaag B, Iversen GT, Gilje B, Blix ES, Espelid H, Lundgren S, Geisler J, Aase HS, Aas T, Gudlaugsson EG, Llop-Guevara A, Serra V, Janssen EAM, Lonning PE, Knappskog S, Eikesdal HP. Homologous Recombination Deficiency Across Subtypes of Primary Breast Cancer. JCO Precis Oncol. 2023 Sep;7:e2300338. doi: 10.1200/PO.23.00338.PMID 36223740Wang L, Wang D, Sonzogni O, Ke S, Wang Q, Thavamani A, Batalini F, Stopka SA, Regan MS, Vandal S, Tian S, Pinto J, Cyr AM, Bret-Mounet VC, Baquer G, Eikesdal HP, Yuan M, Asara JM, Heng YJ, Bai P, Agar NYR, Wulf GM. PARP-inhibition reprograms macrophages toward an anti-tumor phenotype. Cell Rep. 2022 Oct 11;41(2):111462. doi: 10.1016/j.celrep.2022.111462.PMID 36048535Batalini F, Gulhan DC, Mao V, Tran A, Polak M, Xiong N, Tayob N, Tung NM, Winer EP, Mayer EL, Knappskog S, Lonning PE, Matulonis UA, Konstantinopoulos PA, Solit DB, Won H, Eikesdal HP, Park PJ, Wulf GM. Mutational Signature 3 Detected from Clinical Panel Sequencing is Associated with Responses to Olaparib in Breast and Ovarian Cancers. Clin Cancer Res. 2022 Nov 1;28(21):4714-4723. doi: 10.1158/1078-0432.CCR-22-0749.

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