Exploratory Lapatinib (Positron Emission Tomography) PET Study in Subjects With Breast Cancer

Study Overview
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Brief Summary
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The purpose of this study is to find out how much lapatinib can enter both normal brains and brains in which tumours secondary to breast cancer have developed.

Detailed Description
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Lapatinib is an anti-cancer drug taken by mouth which inhibits the HER2 protein, overexpressed in some breast tumours. It is not known whether lapatinib passes through the blood-brain barrier, and, therefore, whether it can target secondary tumours in the brain. This study will investigate whether lapatinib does indeed enter the brain. Subjects with HER2-overexpressing breast cancer, with and without brain metastases, will receive lapatinib tablets daily for 8 days. The subjects will also receive lapatinib with a small amount of radioactivity attached on the first and last days of dosing to investigate whether it is taken up by the brain, using positron emission tomography (PET) scans.

Official Title
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An Open-label Positron Emission Tomography Study to Investigate and Quantify Brain and Tumour Penetration of [11C]Lapatinib in Subjects With HER2-overexpressing Breast Cancer

Conditions
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Cancer

Intervention / Treatment
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* Drug: Lapatinib
* Drug: [11C] lapatinib


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Female, aged >/= 18 years old Advanced or metastatic breast cancer with overexpression of HER2 Be able to provide written informed consent and comply with protocol requirements If of child-bearing potential, using adequate and medically acceptable contraception method Have an ECOG performance status of 0-2 and be in stable condition Able to lie still on the PET scanner for approx. 1.5-2 h Adequate hepatic and renal function Patent ulnar artery or collateral arterial blood vessels If have CNS metastases, disease must be stable Subjects with CNS metastases should have at least a single 1 cm diameter lesion as shown on contrast MRI Exclusion Criteria: Subjects with brain metastases who have undergone prior CNS surgery Significant brain abnormalities, neurological disorder, psychiatric disorder or previous brain damage Diabetes type I History of HIV, hepatitis B or hepatitis C infection Current alcohol and/or drug abuse Positive pregnancy test or lactation Malabsorption syndrome or disease affecting gastrointestinal function that may affect intestinal absorption Requirement for additional concurrent anti-cancer therapy History of uncontrolled or symptomatic angina Concurrent treatment with an investigational agent or anti-cytotoxic therapy or use within 30 days or 5 half-lives Known hypersensitivity reaction of idiosyncrasy to drugs chemically related to lapatinib or its excipients Concurrent treatment with CYP3A4 inducers and inhibitors Unwillingness to refrain from consuming red wine, Seville oranges, grapefruit, pomelo, grapefruit hybrids and their juices from 7 days before Day 1 until collection of the final pharmacokinetic sample Known history of claustrophobia Known contraindications or likely risk of toxicity to gadlinium-based MRI contrast media Presence of cardiac pacemaker, other electronic device or ferromagnetic metal foreign bodies Any abnormality found on the MRI scan which, in the opinion of the investigator, may influence the outcome of the PET scans or affect the safety of the volunteer Acute or active hepatic or biliary disease Any medical condition or circumstance making the volunteer unsuitable for participation in the study.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: lapatinib<br>unlabelled, administered orally | Drug: Lapatinib<br>* Unlabelled, administered orally<br>* Other names: Tyverb;Drug: [11C] lapatinib<br>* Radiolabelled, administered intravenously<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Brain penetration of [11C]lapatinib |  | 8 days | 
| Brain tumour penetration of [11C]lapatinib |  | 8 days | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Safety as assessed by number of subjects with adverse events |  | 16-19 days | 
| [11C]lapatinib uptake in non-brain tumour sites |  | 8 days | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Brain penetration, positron emission tomography, Lapatinib