Lapatinib in Combination With Radiation Therapy in Patients With Brain Metastases From HER2-Positive Breast Cancer

Nancy Lin, MD

Status and phase

Completed

Phase 1

Conditions

Breast Cancer

Brain Metastases

Treatments

Drug: Lapatinib

Procedure: Whole Brain Radiation

Drug: Herceptin

Study type

Interventional

Funder types

Other

Industry

Identifiers

NCT00470847

06-356

Details and patient eligibility

About

The purpose of this research study is to determine the safety of combining lapatinib plus radiation in patients with breast cancer that has spread to the brain. Depending upon the participants cancer, they may also have stereotactic radiosurgery (SRS). Lapatinib s a compound that may stop cancer cells from growing abnormally. It is thought that lapatinib might also make cancer cells more sensitive to radiation. This drug has been used in other research studies in women with breast cancer, and information from those other research studies suggests that lapatinib may help to shrink or stabilize breast tumors both inside the brain and outside the brain.

Full description

Participant's will be given a study medication-dosing calendar for each treatment cycle. Each treatment cycle lasts four weeks. On the first day of the treatment cycle, participants will take 1 lapatinib orally twice per day, 12 hours apart. After the first day, lapatinib will be taken once a day in the morning.
Whole brain radiation treatments will begin approximately 1-8 days after the first dose of lapatinib. The radiation treatments will follow standard guidelines and will be supervised by a radiation oncologist. Radiation will be given in 15 treatments over a period of three weeks.
Some participants will also undergo stereotactic radiosurgery (SRS). SRS is a highly focused and intense form of radiation treatment generally done as an outpatient procedure in a single treatment.
After whole brain radiation treatments are completed, lapatinib will be continued at the same dose for one more week. After that, the lapatinib dose may change. In addition at the same time, Herceptin will be started. Participants will continue with both lapatinib and herceptin together as long as there is evidence that they are benefitting from it.
During all treatment cycles participants will have a physical exam and be asked general questions about their health. Photographs will be taken of the tumor, if visible, to assess the response of the tumor to the treatment. An assessment of the tumor by CT scan of the body, and MRI imaging of the brain will be performed every two months. An assessment of heart function by MUGA scan or echocardiogram will be performed every 8 weeks. The participant will also be asked to complete a brief questionnaire measuring quality of life and asking about symptoms related to the cancer at baseline, 6 months, and one year. Blood tests will be performed every 4 weeks.

Enrollment

35 patients

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Histologically or cytologically-confirmed invasive breast cancer
HER2 overexpressing breast cancer defined as 3+ staining by immunohistochemistry, or HER2 gene amplification by FISH
At least one parenchymal brain metastasis
Disease progression in the CNS as assessed by at least one of the following; new neurological signs or symptoms; new lesion(s) in the CNS on an imaging study; progressive lesions on an imaging study
At least two weeks since prior radiotherapy, last chemotherapy, immunotherapy, biologic therapy, or major surgery for cancer
18 years of age or older
Life expectancy of greater than 12 weeks
ECOG performance status 0-2
Normal organ and marrow function as described in the protocol
Left ventricular ejection fraction > 50%
Able to swallow and retain oral medications

Exclusion criteria

Prior WBRT
Receiving any other investigational agents
Concurrent chemotherapy, immunotherapy, biologic therapy or hormonal therapy for treatment of their cancer
History of grade 3 or 4 allergic reactions attributed to compounds of similar chemical or biologic composition to herceptin or lapatinib
Leptomeningeal carcinomatosis as the only site of CNS involvement
Concurrent treatment with medications that are either inducers of inhibitors of CYP3A4
Malabsorption syndrome, disease significantly affecting gastrointestinal function, or resection of the stomach or small bowel or active ulcerative colitis
History of immediate or delayed hypersensitivity reaction to gadolinium contrast agents
Other known contraindication to MRI
Uncontrolled intercurrent illness
History of other active malignancy except curatively treated basal cell carcinoma or squamous cell carcinoma of the skin, or carcinoma in situ of the cervix
Pregnant or breastfeeding women