Fluorine F 18 Sodium Fluoride Positron Emission Tomography in Evaluating Response to Dasatinib in Patients With Prostate Cancer and Bone Metastases

PRIMARY OBJECTIVES:

I. Determine if changes in regional fluoride incorporation, measured by 18F-fluoride PET (SUV and Ki), occur in both castration-resistant prostate cancer bone metastases and normal bone as a response to treatment with dasatinib.

SECONDARY OBJECTIVES:

I. Determine if changes in 18F-fluoride transport (K1), an indicator of blood flow, and therefore, an indirect marker of angiogenesis, occur in both castration-resistant prostate cancer bone metastases and normal bone as a response to treatment with dasatinib.

OUTLINE: This is a multicenter study.

Patients undergo fluorine F 18 sodium fluoride PET scan at baseline and then at 12 weeks after initiation of treatment with dasatinib. PET parameters (SUV, Ki, and Kl) are also analyzed.

Inclusion criteria

• Must be able to provide a written informed consent
• Men 18 years or older with metastatic castration-resistant prostate cancer enrolling onto the Febbo clinical trial with dasatinib therapy (must meet all inclusion criteria for dasatinib treatment study and comply with requirements of that specific clinical trial)
• Histologic confirmation of original prostate cancer diagnosis
• Presence of at least one convincing bone metastasis as defined by bone scintigraphy, computed tomography (CT) scan (magnetic resonance imaging [MRI] if indicated), or plain X-ray
• Must currently have castrate testosterone levels (< 50 ng/dL) from orchiectomy or maintenance on a luteinizing hormone-releasing hormone (LHRH) agonist or LHRH antagonist

Exclusion criteria

• On the nilutamide-only arm (Arm A of the clinical therapeutic trial)

• Note: However, if a patient crosses-over from nilutamide at the time of progression to add dasatinib therapy, he may be eligible for 18F-fluoride PET imaging protocol if he meets all inclusion criteria for this trial
• Any condition that would alter the patient's mental status, prohibiting the basic understanding and/or authorization of informed consent
• A serious underlying medical condition that would otherwise impair the patient's ability to receive treatment and imaging studies
• Expected lifespan of 12 weeks or less
• Extremely poor intravenous access, prohibiting the placement of a peripheral IV line for injection of radiotracer
• Initiation of bisphosphonate therapy less than 4 weeks from the first PET scan
• Radiation treatment to bone less than 4 weeks from first PET scan
• Radiopharmaceutical treatment to bone less than 4 weeks from first PET scan
• Treatment with granulocyte-macrophage colony stimulating factor (GM-CSF) or granulocyte CSF (G-CSF) within 4 weeks prior to first PET scan
• Inability to lie still for the imaging
• Weight > 300 lbs. (due to equipment specifications)