Lapatinib and Circulating Tumor Cells in Breast Cancer

University Hospital of Crete

Status and phase

Completed

Phase 2

Conditions

Metastatic Breast Cancer

Treatments

Drug: Lapatinib

Study type

Interventional

Funder types

Other

Identifiers

NCT00694252

CT/07.15

Details and patient eligibility

About

This study will evaluate the efficacy of lapatinib in eradicating chemo- resistant tumour cells circulating in the blood of patients with breast cancer.

Full description

Breast cancer is considered a systemic disease since early tumour cell dissemination may occur even in patients with small tumours; several investigators using immunocytochemistry or real time PCR (RT-PCR) have shown that cytokeratin-positive epithelial cells could be identified in the bone marrow aspirates or the peripheral blood of otherwise metastases-free patients with stage I and II breast cancer. The clinical importance of the immunocytochemical detection of occult tumour cells in the bone marrow has been confirmed in many prospective studies to represent an independent predictive and prognostic factor for distant relapse and reduced survival.

Patients with metastatic breast cancer who have persistent detection of tumour cells in the peripheral blood (≥5 cells/7.5 ml) despite at least one line of chemotherapy will receive lapatinib for a minimum of one month unless disease progression occurs at an earlier time point.

Enrollment

20 patients

Sex

Female

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Provision of written informed consent
Histologically or cytologically confirmed breast cancer
Metastatic breast cancer (stage IIIB and IV). EGFR and/or HER-2 expression on the primary tumor is not mandatory.
Patients should have received at least one course of standard systemic chemotherapy for their metastatic disease. Prior hormonal therapy is allowed.
Patients should have achieved objective response (CR or PR) or stable disease to previous first or second line treatment.
There should be at least one month between the end of chemotherapy treatment and trial entry. In case of prior Herceptin administration, 3 months are required to have elapsed before study entry.
Detection of ≥5 cells/7.5ml of peripheral blood detected by Cell Search System despite the previous administration of chemotherapy and/or hormonal therapy.
HER-2 expression on CTCs.
Age 18 years and over
Adequate Haematological function, Absolute neutrophil count ≥1.5 x 109/L, Platelet count ≥100 x 109/L and Haemoglobin ≥9 g/dL (may be transfused to maintain or exceed this level)
Adequate Liver Function, total bilirubin <1.5 x upper limit of normal, AST and ALT <2.5 x upper limit of normal in patients without liver metastases and <5 x upper limit of normal in patients with liver metastases
Adequate Renal function, Serum creatinine ≤1.25 x upper limit of normal or calculated creatinine clearance ≥50 mL/min
LVEF within institutional normal range
Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 2
Life expectancy of at least 12 weeks

Exclusion criteria

Any concurrent systemic treatment for breast cancer (including chemotherapy, radiotherapy, hormonotherapy, monoclonal antibodies)
Other co-existing malignancies or malignancies diagnosed within the last 5 years with the exception of basal cell carcinoma or cervical cancer in situ
Any unresolved chronic toxicity greater than Grade 2 (NCI- CTCAE) from previous anticancer therapy (except alopecia)
Any evidence of severe or uncontrolled systemic disease (e.g., unstable or uncompensated respiratory, cardiac, hepatic, or renal disease)
Pregnancy or breast feeding (women of child-bearing potential). Women of childbearing potential must practice acceptable methods of birth control to prevent pregnancy
Treatment with any other investigational agent, or participation in another clinical trial within 28 days prior to enrolment
Known hypersensitivity to drugs chemically related to lapatinib
Concomitant requirement for medication classified as CYP3A4 inducers or inhibitors
Evidence of any other disease, neurological or metabolic dysfunction, physical examination finding or laboratory finding giving reasonable suspicion of a disease or condition that contraindicates the use of an investigational drug or puts the patient at high risk for treatment-related complications