|60. Calcium Metabolism in Castration-Resistant Prostate Cancer Patients: Development of a Quantitative Urinary Assay for Extent of Bone Metastasis
|Poster: Tue 6:30-7:30PM
Lawrence Livermore Nat'l Lab
|View Long Abstract
|Initial results from a calcium kinetic study demonstrate that urinary tracer abundance following 41Ca dosing is inversely correlated with bone metastasis extent in castration-resistant prostate cancer patients. Research subjects consumed a single 41Ca tracer dose and provided urine at regular intervals. Lower urinary 41Ca/Ca was significantly associated with increasing skeletal tumor burdens from 7 to 90 days after isotope administration. These results suggest that development of an isotopic urine test for bone metastasis extent is feasible, providing a non-invasive and quantitative compliment to nuclear imaging and organic measures of bone remodeling.