Utilizing A Genomic Sig for "BRCAness" to Eval the Efficacy of Satraplatin in Men With Met. Castration Resistant Prostate Ca

The purpose of the study is to test genes for BRCAness(BRCA\[BReast CAncer\] gene) Studying these genes could help predict which patients would benefit from treatment with satraplatin, a medication being used for subjects who have failed prior chemotherapy. All subjects will have a biopsy of metastatic lesions to measure BRCAness (a gene signature). This gene signature may be able to predict response to satraplatin and a tool will be developed to be able to screen patients likely to benefit from satraplatin. Subjects will all receive Satraplatin days 1-5 and Prednisone 5 mg twice daily every 35 days. Response rates will be evaluated every 2 cycles or approximately every 9 weeks. Patients will be considered responders if they have measurable disease meeting criteria for partial or complete response. PSA will be measured day one of each treatment cycle. Each treatment cycle is 35 days.