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Background:
Brain metastasis is the most common intra-cranial tumor in adults with approximately 170,000 new cases being diagnosed in the United States annually. The incidence of brain metastasis is increasing. Usually brain metastases of breast cancer occur after the diagnosis of systemic metastases; but approximately 10 25% of patients with lung cancer have brain metastases at diagnosis and another 40 50% develop them during the course of their disease. Multiple factors are contributing to this increase: aging population, improved imaging techniques, and improvement in the treatment of tumors leading to prolonged survival, thereby allowing the emergence of brain metastases, with the brain being generally regarded as a sanctuary site because of the blood brain barrier (BBB). Lung cancer and breast cancer are the leading tumor types, accounting for approximately 50% and 15 - 20% of patients with brain metastases. This study will evaluate the ability of 18F-FLT to determine if amount of change in the uptake in the brain metastases from breast and lung cancer after one dose of therapy with GRN1005, correlates with intra-cranial response. FLT-PET utilizes a radiolabeled form of thymidine, which is incorporated into DNA in proliferating cells. 18F-FLT uptake correlates better than 18F-FDG with proliferation, tumor progression, and survival. Because CNS uptake of FLT is low in contrast to FDG, this makes it potentially useful in evaluating CNS metastases. We would like to see which of these imaging modalities is superior in detection of brain metastases, and monitoring response to therapy.
Objectives:
-Determine whether one cycle of therapy GRN1005 is associated with a change in FLTPET uptake.
Eligibility:
Design:
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Inclusion and exclusion criteria
INCLUSION CRITERIA:
Adult patients (greater than or equal to 18 years)
Histologically or cytologically-documented breast cancer (HER2 status must be known) or NSCLC
Presence of resectable brain metastases with or without prior radiotherapy. Patients must be greater than 28 days from WBRT or SRS
Presence of resectable brain metastases, as assessed by neurosurgical evaluation. A brain tumor will be considered to be resectable for the purposes of the study if it is located in the cerebrum or the cerebellum. Tumors that are located in deep brain structures, including the medulla, pons, midbrain, thalamus, and basal ganglia will be considered non-resectable. The tumor must be solitary or, if not, accompanied by another tumor on the same side of the brain that is also considered to be resectable by the same criteria.
At least one radiologically-confirmed and measurable metastatic brain lesion (greater than or equal to 1.0 centimeters in the longest diameter) by Gd-MRI of the brain less than 14 days prior to first dose of GRN1005 (Cycle 1, Day 1). The spatial resolution of the Philips Gemini TOF PET/CT is 4millimeters [FWHM, (full width half maximum)]. One cm is greater than 2 times this FWHM and it is anticipated that greater than 70% of the actual activity in the lesion will be visualized (i.e. recovered). It is expected that all lesions greater than or equal to 1 centimeters will have sufficient FLT uptake. If no lesions on the baseline image are visualized on FLT PET/CT, then post therapy FLT imaging will not be performed. These patients will be replaced.
Patients must be neurologically stable, defined as being on stable doses of corticosteroids and anticonvulsants (not enzyme-inducing antiepileptic drugs (EIAEDs), including phenytoin, phenobarbitol, carbamazepine, fosphenytoin, primidone, oxcarbazepine) for greater than or equal to 5 days prior to obtaining the baseline Gd-MRI of the brain and greater than or equal to 5 days prior to first dose of GRN1005
Karnofsky Performance Score (KPS) greater than or equal to 80% (which is equivalent to Eastern Cooperative Oncology Group [ECOG] Performance Status of 0 or 1)
Life expectancy greater than 3 months
Completed cytotoxic chemotherapy greater than or equal to 21 days (for an every 3-week regimen) or greater than or equal to 14 days (for an every 2-week or weekly regimen) prior to first dose of GRN1005 (Cycle 1, Day 1); all clinically significant toxicities (excluding alopecia) must have resolved to less than or equal to CTCAE v4.0 Grade 1.
Completed treatment with non-cytotoxic systemic drugs (e.g., targeted drugs) greater than or equal to 14 days for small molecules and greater than or equal to 28 days for monoclonal antibodies (e.g., bevacizumab, with the exception of trastuzumab and bisphosphonates) prior to first dose of GRN1005 (Cycle 1, Day 1). All clinically significant toxicities (excluding alopecia) must have resolved to less than or equal to CTCAE v4.0 Grade 1.
Adequate laboratory test results for organ systems less than equal 14 days prior to first dose of GRN1005, as follows:
SGPT) less than 2.5 times ULN. AST, ALT less than 5 times ULN for patients with documented liver metastases
Alkaline phosphatase less than 2.5 times ULN. For patients with documented liver or bone metastases, alkaline phosphatase less than 5 times ULN
Serum creatinine less than 1.5 milligrams per deciliter or creatinine clearance greater than or equal to 45 millliter per minute
EXCLUSION CRITERIA:
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0 participants in 2 patient groups
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Data sourced from clinicaltrials.gov
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