A Phase 1 Study of MDV3100 in Patients With Castration-Resistant (Hormone-Refractory) Prostate Cancer

An adverse events (AE) was any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. An SAE was an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly. A treatment emergent AE was defined as an event that emerged during the treatment period that was absent before treatment, or worsened during the treatment period relative to the pretreatment state. AEs included both SAEs and non-SAEs.

DLT was defined as a national cancer institute's common toxicity criteria for adverse events (NCI-CTCAE) version 3.0 grade 3 or greater toxicity regardless of perceived causality that is not improved by the use of adequate/maximal medical intervention. Grade 3 alopecia, fever without neutropenia, nausea, vomiting, fatigue, and self-limited or medically controllable adverse events were not considered as DLTs.

Tolerability was defined as if less than (<) 4/12 in participants with no prior exposure to MDV3100 (chemo-naive) and < 4/12 prior chemotherapy participants experienced a DLT within the first 35 days of the multiple dose period. For doses higher than 360 mg/day, tolerability was defined if <8/24 participants previously treated with chemotherapy experience a DLT within the first 35 days of the multiple dose period. MTD was defined as a dose below the intolerable dose.

T 1/2 is the time measured for the plasma concentration of MDV3100 to decrease by one half.

Volume of distribution is defined as the theoretical volume in which the total amount of MDV3100 would need to be uniformly distributed to produce the desired plasma concentration of MDV3100. Apparent volume of distribution after oral dose (V/F) is influenced by the fraction absorbed.

Clearance of a MDV3100 is a measure of the rate at which a MDV3100 is metabolized or eliminated by normal biological processes. Clearance obtained after oral dose (apparent oral clearance) is influenced by the fraction of the dose absorbed.

Clearance of a MDV3100 is a measure of the rate at which a MDV3100 is metabolized or eliminated by normal biological processes. Clearance obtained after oral dose (apparent oral clearance) is influenced by the fraction of the dose absorbed.

Prostate-specific antigen is a glycoprotein considered as a biomarker for the response to therapy in men with prostate cancer. A 50 percent (%) decline in PSA from baseline to the PSA level at Day 84 was considered as a PSA response.