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Published on: December 15, 2017
Clinical profile of a new non-steroidal antiandrogen
Abstract:
Recently a new non-steroidal antiandrogen (Casodex) has been shown in animal experiments to possess a potent peripheral antiandrogen effect. In patients with advanced prostatic cancer however, this drug is not peripherally selectively active and blocked central brain androgen-receptors results in a rise of luteinizing hormone (LH) and testosterone (T). We treated 18 advanced prostatic cancer patients with 50 mg Casodex daily for a mean period of 42 weeks. There were no complete objective responses but partial responses were seen in a few patients. In 16 patients there was a greater than 50% reduction of pretreatment PSA levels. Endocrine evaluations showed a significant rise in LH, T and oestradiol (E), reaching peak values within the two first months with subsequent lowering of these levels afterwards but without returning to normal. The general tolerance of the drug was good, gynecomastia being the most frequent side-effect. Libido and potency, when present before start of therapy, were maintained in some patients. We conclude that this compound seems as effective as other antiandrogens, but with improved compliance, and shows less side effects in the management of advanced prostatic cancer.
Insights
Casodex (bicalutamide) shows effectiveness in advanced prostate cancer by reducing PSA levels. While not peripherally selective, it offers good tolerance and fewer side effects compared to other antiandrogens.
Area of Science:
- Oncology
- Endocrinology
Background:
- New non-steroidal antiandrogen, Casodex, demonstrates peripheral antiandrogen effects in animal models.
- In advanced prostate cancer, Casodex lacks peripheral selectivity, impacting central androgen receptors.
Purpose of the Study:
- To evaluate the efficacy and safety of Casodex in patients with advanced prostate cancer.
- To assess the endocrine effects of Casodex treatment in this patient population.
Main Methods:
- 18 patients with advanced prostate cancer received 50 mg of Casodex daily.
- Treatment duration averaged 42 weeks, with assessments including PSA levels and endocrine evaluations.
Main Results:
- Partial responses observed in some patients; 16/18 showed >50% reduction in PSA levels.
- Significant increases in luteinizing hormone (LH), testosterone (T), and oestradiol (E) were noted, peaking early and then declining but not normalizing.
- Good general tolerance, with gynecomastia as the most common side effect.
Conclusions:
- Casodex appears effective in managing advanced prostate cancer, comparable to other antiandrogens.
- Improved compliance and a favorable side effect profile suggest Casodex as a viable option.
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