Identifying genetic factors affecting treatment response in HER2-positive breast cancer

Identification of Genetic Determinants for Treatment Resistance/Sensitivity and/or Toxicity in Adjuvant Setting for HER2 Positive Breast Cancer

Institut de cancérologie Strasbourg Europe · NCT04638725

This study is trying to find out how genetic differences affect how well people with HER2-positive breast cancer respond to treatment and if they experience side effects.

Quick facts

Study typeObservational
Enrollment9000 (estimated)
Ages18 Years and up
SexFemale
SponsorInstitut de cancérologie Strasbourg Europe (other)
Drugs / interventionstrastuzumab, pertuzumab, neratinib, chemotherapy
Locations1 site (Strasbourg)
Trial IDNCT04638725 on ClinicalTrials.gov

What this trial studies

This multicenter, non-randomized, prospective cohort study aims to identify genetic determinants associated with treatment resistance, sensitivity, and toxicity in patients with HER2-positive breast cancer. A total of 9000 patients will be enrolled, and blood samples will be collected for genetic analysis after informed consent. The study will evaluate the distribution of genetic variants among patients treated with various targeted therapies and follow them for five years to assess treatment outcomes. The findings could enhance understanding of how genetic factors influence treatment responses in this patient population.

Who should consider this trial

Good fit: Ideal candidates include adults aged 18 and older with a histological diagnosis of operable, non-metastatic HER2-positive breast adenocarcinoma who have received or are receiving HER2-targeted therapy.

Not a fit: Patients with a history of cancer in the past five years or those unable to comply with the study protocol may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to personalized treatment strategies for patients with HER2-positive breast cancer, improving outcomes and minimizing toxicity.

How similar studies have performed: Other studies have explored genetic determinants in cancer treatment, but this specific approach focusing on HER2-positive breast cancer is relatively novel.

Eligibility criteria

Show full inclusion / exclusion criteria
For inclusion in the study, patients must be affiliated to the national or local social security, and must meet all the following criteria:

Inclusion Criteria:

* Age ≥ 18 years
* Histological diagnosis of breast adenocarcinoma. Non-metastatic and operable.
* Current or prior treatment with one therapy targeting HER2 in adjuvant or neoadjuvant phase for the current breast cancer
* Given written informed consent

Exclusion Criteria:

* Patients not able to comply to the protocol assessments for geographic, social or psychological reasons
* Patients placed under judicial protection, guardianship, or supervision
* History of cancer in the 5 years preceding anti-HER2 therapy initiation
* Concomitant cancer (except for an other non metastatic cancer treated only with surgery)

Note : Patients are eligible at any time of the follow-up if the adjuvant or neoadjuvant chemotherapy started after 01/01/2019. Patients treated with trastuzumab, pertuzumab, neratinib or T-DM1 in a clinical trial are eligible in the SIGHER study.

Where this trial is running

Strasbourg

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: HER2-positive Breast Cancer

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.