Examining nerve damage from T-DM1 in HER2-positive breast cancer patients

A Study of the Natural History of Ado-trastuzumab Emtansine (T-DM1)-Induced Peripheral Neuropathy in HER2-positive Breast Cancer Patients

Observational Mayo Clinic · NCT05889988

This study looks at how the breast cancer drug T-DM1 affects nerve health over time in people with HER2-positive breast cancer, whether or not they have had nerve problems before.

Quick facts

Study typeObservational
Enrollment50 (estimated)
Ages18 Years and up
SexAll
SponsorMayo Clinic Academic / other
Drugs / interventionstrastuzumab
Locations21 sites (Aitkin, Minnesota and 20 other locations)
Trial IDNCT05889988 on ClinicalTrials.gov

What this trial studies

This observational study aims to investigate the natural history of peripheral neuropathy induced by ado-trastuzumab emtansine (T-DM1) in patients with HER2-positive breast cancer. It will include patients with and without a history of neuropathy or prior neurotoxic treatments. Participants will be required to complete a baseline questionnaire and continue follow-up at the same institution. The study will help understand the effects of T-DM1 on nerve health over time.

Who should consider this trial

Good fit: Ideal candidates are patients planning to receive three or more doses of T-DM1 for HER2-positive breast cancer, regardless of their treatment line.

Not a fit: Patients who have previously received T-DM1 or are currently using other neurotoxic anticancer agents may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide valuable insights into managing and preventing T-DM1-induced peripheral neuropathy in breast cancer patients.

How similar studies have performed: While studies on T-DM1 exist, this specific focus on neuropathy is relatively novel and has not been extensively tested.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Planning to receive three or more doses T-DM1 for HER2-positive metastatic breast cancer (any line) or for earlier-stage breast cancer. The patient may have received one dose of T-DM1, prior to study entry if it has not been longer than 14 days since that dose and that the patient will be able to complete the required baseline questionnaire within 14 days of their first dose of T-DM1.
* Patients with previous use of neurotoxic antineoplastic agents (excluding previous use of T-DM1), pre-existing CIPN, or peripheral neuropathy secondary to other causes will be able to be enrolled in the study.
* The patient plans to continue clinical follow-up at the same institution, where the patient entered the study.
* Provide informed consent.
* Ability to complete questionnaire(s) in English by themselves or with assistance.

Exclusion Criteria:

* Previous use of T-DM1
* Concomitant use of other neurotoxic anticancer agents including cisplatin, carboplatin, oxaliplatin, docetaxel, paclitaxel, vincristine, eribulin, vinorelbine, thalidomide, lenalidomide, bortezomib, or epothilones. If the patient used any of these previously, then they must have been stopped for at least 7 days prior to study entry.
* Current use of commonly used drugs for the treatment of peripheral neuropathy, including duloxetine, gabapentinoids (pregabalin and gabapentin), venlafaxine, nortriptyline, or amitriptyline (including use of these medications for things other than neuropathy). If the patient used any of these previously, then they must have been stopped for at least 7 days prior to study entry.

Where this trial is running

Aitkin, Minnesota and 20 other locations

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.
Conditions Breast NeoplasmAdo-trastuzumab emtansinePeripheral NeuropathyHER2-positive
Last reviewed 2026-06-13 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.