Tucatinib With Brain and/or Spinal XRT in Patients With HER2+ Metastatic Breast Cancer and LMD

Study Purpose

The proposed study will evaluate the safety and efficacy of XRT followed by systemic therapy among patients with HER2+ metastatic breast cancer and LMD

Recruitment Criteria

Accepts Healthy Volunteers

Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms

No
Study Type

An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes.


An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes.


Searching Both is inclusive of interventional and observational studies.

Interventional
Eligible Ages 18 Years and Over
Gender All
More Inclusion & Exclusion Criteria

Inclusion Criteria:

Phase 1. 1. Men or women with HER2+* metastatic breast cancer. *HER2+ status will be defined in accordance with ASCO-CAP 2018 guidelines, and can be diagnosed at any time prior to enrolment; 2. Evidence of LMD* in the brain and/or spine (either positive cerebral spinal fluid cytology and/or magnetic resonance imaging evidence of LMD). Measurable disease in the central nervous system is not required. * The diagnosis of LMD can occur at any time prior to enrolment; 3. Age 18+ at time of consent; 4. ECOG ≤ 2; 5. More than 14 days or 5 half-lives from the last dose of any experimental agent is required, whichever is greater; 6. All toxicity related to prior cancer therapies must have resolved to ≤ Grade 1 prior to enrollment, except for alopecia; neuropathy, must have resolved to ≤ Grade 2. Phase 2: Inclusion Criteria. 1. Left ventricular ejection fraction (LVEF) must be within institutional limits of normal as assessed by ECHO or MUGA documented within 2 weeks prior to starting systemic therapy on the study; 2. Adequate hematologic, liver, and renal function within 2 weeks prior to phase 2 enrollment, as follows: 1. Hemoglobin ≥ 9 g/dL. 2. ANC ≥ 1 x109/L. 3. Platelets ≥ 100 x109/L. 4. Total bilirubin ≤ 1.5 X upper limit of normal (ULN) 5. AST and ALT ≤ 2.5X ULN. 6. International normalized ratio (INR) and activated partial thromboplastin time (aPTT) ≤ 1.5 X ULN. 7. Creatinine clearance (CrCL) ≥ 50 mL/min. 3. The last dose of prior therapy must have been completed 14 days prior to study enrollment. Prior chemotherapy, immunotherapy, endocrine therapy, targeted therapy and experimental agents are allowed (including prior use of trastuzumab or other antibody-based therapy). Prior use of capecitabine either alone or in combination with other HER2-targeted therapies (including other tyrosine kinase inhibitors) is permitted;

Exclusion Criteria:

Phase 1. 1. Prior WBRT for brain metastases (prior stereotactic radiosurgery for parenchymal CNS metastases received <7 days prior to consent ); 2. Prior therapy specifically directed at LMD, including prior radiotherapy or systemic therapy; 3. Inability to comply with MRI-based surveillance of CNS disease; 4. Inability to swallow pills or any significant gastrointestinal diseases such as inflammatory bowel disease who suffer from uncontrolled diarrhea (based on the investigator's assessment),, which would preclude adequate absorption of oral medications; 5. Presently known dihydropyrimidine dehydrogenase deficiency; 6. Diagnosed with Hereditary fructose intolerance; 7. Diagnosed with Gilbert's disease; 8. Prior history of other cancer (except non melanoma skin, cervical intraepithelial neoplasia) with evidence of disease within the last 5 years; 9. Prior use of tucatinib at any time prior to enrollment. 10. Hypersensitivity to any of the active substances in tucatinib, trastuzumab, or capecitabine. Phase 2: 1. Currently pregnant or breastfeeding; 2. Use of a strong cytochrome P450 (CYP)2C8 inhibitor within 5 half-lives of the inhibitor or use of a strong CYP3A4 or CYP2C8 inducer within 5 days prior to the first dose of systemic therapy (see Appendix C and D); 3. Myocardial infarction or unstable angina within 6 months prior to the first dose of systemic therapy. 4. Blood product transfusions in order to meet eligibility criteria

Trial Details

Trial ID:

This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.

NCT06016387
Phase

Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans.

Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data.

Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs.

Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.

Phase 2
Lead Sponsor

The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.

Sunnybrook Health Sciences Centre
Principal Investigator

The person who is responsible for the scientific and technical direction of the entire clinical study.

N/A
Principal Investigator Affiliation N/A
Agency Class

Category of organization(s) involved as sponsor (and collaborator) supporting the trial.

Other, Industry
Overall Status Recruiting
Countries Canada
Conditions

The disease, disorder, syndrome, illness, or injury that is being studied.

HER2-positive Breast Cancer, LMD
Additional Details

Breast cancer is the most common cancer among women worldwide, and the second leading cause of brain metastases (BrM). Despite recent treatment advances, the prognosis of patients with breast cancer BrM remains poor, and the prognosis among those with leptomeningeal disease (LMD) is particularly dire with a median survival of only 2-4 months. Patients with HER2+ metastatic breast cancer have a high life-time risk of central nervous system (CNS) metastases, with an approximately 50% lifetime risk. Although the cause of death among patients with breast cancer BrM is challenging to ascertain, approximately 50% of patients with HER2+ BrM are thought to die from central nervous system (CNS) disease involvement. Among patients with LMD specifically, the cause of death is most commonly related to CNS disease. In an analysis of 430 patients (96 of whom had breast cancer) treated for LMD in the National Cancer Database between 2005 and 2014, those patients treated with chemotherapy plus radiotherapy had a longer median overall survival of 5 months (3.5

  • - 6.5 months) compared to patients treated with XRT or chemotherapy alone.
In addition, a majority (n=18/26, 69%) of observational studies irrespective of primary tumor site have shown an "improvement or likely improvement" in survival with the use of XRT for LMD, either alone or in combination with systemic therapy. Hence, this proposed study will evaluate the safety and efficacy of XRT followed by systemic therapy (which is considered standard of care) among patients with HER2+ metastatic breast cancer and LMD.

Arms & Interventions

Arms

Experimental: Tucatinib, Transtuzumab, Capecitabine

Tucatinib, Trastuzumab and Capecitabine With Brain and/or Spinal Radiotherapy (XRT) in Patients With HER2+ Metastatic Breast Cancer and Leptomeningeal Disease.

Interventions

Drug: - Tucatinib 150 MG

Tucatinib is a potent, selective, adenosine triphosphate-competitive small-molecule inhibitor of the receptor tyrosine kinase HER2. The molecular formula for tubatinib is C26H24N8O2 and it has a molecular weight of 480.52 g/mol.

Drug: - Trastuzumab

MYL-1401O contains the active substance trastuzumab, which is an IgG1 monoclonal antibody. The molecular size of the intact molecule is around 148 kDa. Each vial of MYL-1401O contains 150 mg of lyophilized proposed active biosimilar substance trastuzumab as well as 3.36 mg L-Histidine Hydrochloride, 2.16 mg L-Histidine, 115.2 mg sorbitol and 33.6 mg PEG-3350 (Macrogol 3350). Sorbitol and PEG-3350 substitute the α- trehalose dehydrate and polysorbate-20, which are used as excipients in the EU-approved and US-licensed Herceptin formulations.

Drug: - Capecitabine

Capecitabine is a tumour-activated antineoplastic agent (antimetabolite). The molecular formula for capecitabine is C15H22FN3O6 and has a molecular weight of 359.35 g/mol.

Radiation: - Brain & Spinal Radiation

Brain & Spinal XRT is a treatment for patients with HER2+ metastatic breast cancer and leptomeningeal disease,

Contact a Trial Team

If you are interested in learning more about this trial, find the trial site nearest to your location and contact the site coordinator via email or phone. We also strongly recommend that you consult with your healthcare provider about the trials that may interest you and refer to our terms of service below.

International Sites

The Ottawa Hospital, Ottawa 6094817, Ontario 6093943, Canada

Status

Recruiting

Address

The Ottawa Hospital

Ottawa 6094817, Ontario 6093943,

Sunnybrook Health Sciences Centre, Toronto 6167865, Ontario 6093943, Canada

Status

Recruiting

Address

Sunnybrook Health Sciences Centre

Toronto 6167865, Ontario 6093943, M4N 3M5

Site Contact

Katarzyna Jerzak, MD

[email protected]

437-247-2617

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