Xenografts Development From Surgical Tumor Samples of Patients With Triple Negative or Luminal B Breast Cancer

Official title

A Prospective Study of Xenografts Development From Samples Taken From Surgical Specimens of Patients With Triple Negative or Luminal B Breast Cancer

Overview

Patient derived xenografts (PDX) from mammary tumors are usually made from metastatic tumors. Indeed, PDX from primitive mammary tumors or after neoadjuvant treatment are still rare. However, the realization of such PDX (from primitive mammary tumors or after neoadjuvant treatment) would make it possible to have a better knowledge of the tumor heterogeneity to the therapeutic response, to explore the models of tumor evolution during metastatic progression and also observe the mechanisms of tumor resistance in the case of non-metastatic tumors. It therefore seems necessary to develop PDX from primitive tumors in order to observe firstly the success rate of PDX; on the other hand, the drift of the initial heterogeneity, measured by comparison of the histomolecular profile of the tumors with that of the PDXs. It aims to develop xenografts from tumor samples from surgical specimens of patients with triple negative or luminal B breast cancer.

Interventions

• Biological blood samples collection
  Serology and genetic analyses will be performed in patients blood samples

Primary outcome measures

• Percentage of successfull PDX [Time frame: 2 years]

Secondary outcome measures (7)

• Histological subtype [Time frame: 2 years and 4 months]
• expression of estrogen receptors [Time frame: 2 years and 4 months]
• expression of progesterone receptors [Time frame: 2 years and 4 months]
• status of the amplification of the ERBB2 gene [Time frame: 2 years and 4 months]
• expression of androgen receptors [Time frame: 2 years and 4 months]
• tumor molecular classification [Time frame: 2 years and 4 months]
• Exome sequencing [Time frame: 2 years and 4 months]

Eligibility criteria

Inclusion criteria

• ECOG (Eastern Cooperative Oncology Group) performance status ≤ 2
• Signature of the participation consent to the study,
• Affiliation to a social security scheme
• Major woman with:

• metastatic triple-negative (TN) breast cancer, histologically proven before treatment and high grade, receiving neoadjuvant chemotherapy and having, after treatment, a breast residue of at least 15 mm on the specimen. The mammary residue will measure at least 15 mm on the mammography performed at the end of neoadjuvant treatment
• metaplastic triple-negative (TN) breast cancer, histologically proven before treatment and high grade, treated by primary surgery with a tumor size of at least 15 mm on the specimen.
• an inflammatory TN breast cancer (T4d), histologically proven prior to treatment, receiving neoadjuvant chemotherapy and having, after treatment, a breast residue of at least 15 mm on the specimen. The mammary residue will measure at least 15 mm on the mammography performed at the end of the neoadjuvant treatment.
• non-metaplastic or inflammatory TN breast cancer, histologically proven prior to treatment, receiving neoadjuvant chemotherapy and having, after treatment, a mammary residue of at least 30 mm on the specimen. The mammary residue will measure at least 15 mm on the mammography performed at the end of the neoadjuvant treatment.
• Luminal B breast cancer (LB), histologically proven prior to treatment, receiving neoadjuvant chemotherapy and having, after treatment, a mammary residue of at least 30 mm on the specimen. The mammary residue will measure at least 15 mm on the mammography performed at the end of the neoadjuvant treatment.
• histologically proven metastatic TN or metastatic breast cancer with an operable metastasis whose residual size, after chemotherapy, is at least 10 mm on the specimen. Residual metastasis will be at least 15 mm on imaging.
• Patients in a metastatic situation can be included regardless of the therapeutic line.

Exclusion criteria

• Pregnant woman
• Patient deprived of liberty by court or administrative decision
• In neoadjuvant situation: no neoadjuvant treatment by radiotherapy or hormone therapy
• Refusal to participate in the study

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: No

Study design

Allocation

N/A

Model

Single group

Masking

Open label

Primary purpose

Basic science

Study locations

France · 1 center

• Centre Jean PERRIN — Clermont-Ferrand

Publications

• Veyssiere H, Passildas J, Ginzac A, Lusho S, Bidet Y, Molnar I, Bernadach M, Cavaille M, Radosevic-Robin N, Durando X. XENOBREAST Trial: A prospective study of xenografts establishment from surgical specimens of patients with triple negative or luminal b breast cancer. F1000Res. 2020 Oct 9;9:1219. doi: 10.12688/f1000research.26873.3. eCollection 2020. PMID 34249349

Identifiers

NCT: NCT04133077 · 2020-A00398-31

Primary sources (government registries)

• ClinicalTrials.gov (US NIH)

View this study on ClinicalTrials.gov ↗