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- W2153368844 abstract "Abstract Purpose: To evaluate the safety and biological activity of three different doses of marimastat given for 6 months to patients with biochemically relapsed prostate cancer. Experimental Design: Patients with a biochemical relapse within 2 years of primary therapy, a prostate-specific antigen (PSA) increase of at least 50% within 6 months of study entry, and no prior systemic therapy were eligible. Patients were randomized to receive marimastat at total daily doses of 5, 20, or 40 mg for 6 months unless dose-limiting toxicity or new evidence of disease occurred. Results: Thirty-nine patients were treated. Grade 3-4 reversible musculoskeletal toxicity was the only dose-limiting toxicity. Increasing dose was associated with increased probability of experiencing dose-limiting toxicity (5.9%, 42.9% and 88.9% for the 5, 20, and 40 mg groups, respectively; P = 0.03). Accrual was discontinued early on the two higher dose levels due to toxicity. A significant decrease in PSA slope was shown in the 20 mg group when compared with the 5 mg group (0.117 and −0.0046, respectively; P = 0.03) The 40 mg group (versus the 5 mg group) showed a similar change (0.109) with a trend towards significance (P = 0.07). An increased serum matrix metalloproteinase 2 level at month 3 compared with the baseline correlated with a decrease in PSA slopes (Slope, 0.001; 95% confidence interval, 0.0002-0.0018; P = 0.02). Conclusion: These data suggest that marimastat has a biological effect and may effectively delay progression in patients with biochemical relapsed prostate cancer, as shown by the change in PSA slope; however, dose-limiting toxicity at active doses is significant. Confirmatory studies with less toxic matrix metalloproteinase inhibitors employing more conventional end points are indicated. This design is feasible and potentially efficient for screening antimetastatic agents." @default.
- W2153368844 created "2016-06-24" @default.
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- W2153368844 date "2005-06-15" @default.
- W2153368844 modified "2023-10-05" @default.
- W2153368844 title "Marimastat in the Treatment of Patients with Biochemically Relapsed Prostate Cancer: A Prospective Randomized, Double-Blind, Phase I/II Trial" @default.
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- W2153368844 doi "https://doi.org/10.1158/1078-0432.ccr-04-2252" @default.
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