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Lapatinib Resistance in Patients With Breast Cancer
Study of Resistance Mechanisms Against Lapatinib in Patients With ErbB-2-Positive Breast Cancers
RATIONALE: Studying samples of tumor tissue and blood from patients with cancer in the laboratory may help doctors learn more about cancer and the development of drug resistance in patients.
PURPOSE: This research study is looking at lapatinib resistance in patients with breast cancer.
Studie Overzicht
Toestand
Conditie
Interventie / Behandeling
- Genetisch: analyse van genexpressie
- Ander: analyse van biomarkers in het laboratorium
- Genetisch: mutatie analyse
- Genetisch: reverse transcriptase-polymerase kettingreactie
- Ander: immunohistochemische kleuringsmethode
- Genetisch: polymerasekettingreactie
- Geneesmiddel: lapatinib ditosylaat
- Genetisch: fluorescentie in situ hybridisatie
- Ander: cell sorting
Gedetailleerde beschrijving
OBJECTIVES:
- To identify secondary ErbB2 mutations in tumor tissue samples from patients with ErbB2-positive breast cancer treated with lapatinib ditosylate.
- To investigate ErbB2 copy number changes and expression levels.
- To determine abnormalities of other pathways (e.g., c-MET and PI3K) as potential mechanisms of resistance.
OUTLINE: Previously collected tumor tissue samples* are obtained for genetic analysis studies. Samples are analyzed for secondary ErbB2 mutations by nested PCR; ErbB2 copy number changes by quantitative PCR and standard histological FISH; and ErbB2 expression levels by quantitative RT-PCR and IHC. Patients also undergo blood sample collection for extraction of DNA (as normal control DNA) and isolation of EpCAM-positive circulating tumor cells using immunomagnetic cell separation technology. Additional research studies may include mutational and amplification analysis of the c-MET and PI3K pathways.
NOTE: *Patients may undergo biopsy if a post-treatment tumor tissue sample is unavailable.
Studietype
Contacten en locaties
Studie Locaties
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Ohio
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Cleveland, Ohio, Verenigde Staten, 44195
- Cleveland Clinic Taussig Cancer Institute, Case Comprehensive Cancer Center
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Cleveland, Ohio, Verenigde Staten, 44106-5065
- Ireland Cancer Center at University Hospitals Case Medical Center, Case Comprehensive Cancer Center
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Cleveland, Ohio, Verenigde Staten, 44024
- Geauga Regional Hospital
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Cleveland, Ohio, Verenigde Staten, 44060
- Lake/University Ireland Cancer Center
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Cleveland, Ohio, Verenigde Staten, 44121
- University Suburban Health Center
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Cleveland, Ohio, Verenigde Staten, 44122
- UHHS Chagrin Highlands Medical Center
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Cleveland, Ohio, Verenigde Staten, 44130
- Southwest General Health Center
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Cleveland, Ohio, Verenigde Staten, 44145
- UHHS Westlake Medical Center
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Cleveland, Ohio, Verenigde Staten, 44708
- Mercy Cancer Center at Mercy Medical Center
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Deelname Criteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
- Kind
- Volwassen
- Oudere volwassene
Accepteert gezonde vrijwilligers
Geslachten die in aanmerking komen voor studie
Bemonsteringsmethode
Studie Bevolking
Beschrijving
DISEASE CHARACTERISTICS:
Pathologically confirmed invasive breast cancer
- ErbB2-positive disease
Has received or is currently receiving lapatinib ditosylate
- Documented clinical benefit while receiving lapatinib ditosylate (e.g., stable disease of ≥ 12 weeks duration OR a radiographic response)
- Must have tumor tissue samples available for research studies
- Hormone receptor status not specified
PATIENT CHARACTERISTICS:
- Menopausal status not specified
- Not pregnant*
- Coagulation profile normal*
- Platelet count > 100,000/mm³* NOTE: *For patients requiring a post-treatment biopsy
PRIOR CONCURRENT THERAPY:
- See Disease Characteristics
- Concurrent chemotherapy or trastuzumab (Herceptin®) allowed
- No concurrent anticoagulants, including warfarin or low-molecular weight heparin*
- No concurrent antiplatelet therapy, including aspirin, clopidogrel, or other antiplatelet agents* NOTE: *For patients requiring a post-treatment biopsy
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
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Secondary ErbB2 mutations
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ErbB2 copy number changes and expression levels
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Abnormalities of other pathways (e.g., c-MET and PI3K) as potential mechanisms of resistance
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Medewerkers en onderzoekers
Sponsor
Medewerkers
Onderzoekers
- Hoofdonderzoeker: Balazs Halmos, MD, Ireland Cancer Center at University Hospitals Case Medical Center, Case Comprehensive Cancer Center
Studie record data
Bestudeer belangrijke data
Studie start
Studieregistratiedata
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Schatting)
Updates van studierecords
Laatste update geplaatst (Schatting)
Laatste update ingediend die voldeed aan QC-criteria
Laatst geverifieerd
Meer informatie
Termen gerelateerd aan deze studie
Trefwoorden
Aanvullende relevante MeSH-voorwaarden
Andere studie-ID-nummers
- CASE15107 (Andere identificatie: Case Comprehensive Cancer Center)
- P30CA043703 (Subsidie/contract van de Amerikaanse NIH)
- CASE-15107-CC488
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