Abstract: The instant invention provides potent antiandrogen compounds, such as 3?-acetoxyandrost-1,5-diene-17-ethylene ketal and 3?-hydroxyandrost-1,5-diene-17-ethylene ketal, and methods for their use in the prevention and treatment of biological conditions mediated by androgen receptors. Thus, for example, compounds of the invention are useful in the prevention and treatment of prostrate cancer. Furthermore, it has been discovered that compounds of the invention are useful in the prevention and treatment of androgen-independent cancers such as androgen-independent prostrate cancer. Finally, inventive compounds may be used to treat antiandrogen induced withdrawal syndrome.

Abstract: The invention provides methods to treating conditions such as prostate cancer, or for ameliorating one or more symptoms associated with prostate cancer, or for agents that modulate the biological activity of the androgen receptor. The invention also provides methods and compositions suitable for therapeutic applications.

Abstract: The invention provides methods to treating conditions such as prostate cancer, or for ameliorating one or more symptoms associated with prostate cancer, or for agents that modulate the biological activity of the androgen receptor. The invention also provides methods and compositions suitable for therapeutic applications.

Abstract: The instant invention provides potent antiandrogen compounds, such as 3?-acetoxyandrost-1,5-diene-17-ethylene ketal and 3?-hydroxyandrost-1,5-diene-17-ethylene ketal, and methods for their use in the prevention and treatment of biological conditions mediated by androgen receptors. Thus, for example, compounds of the invention are useful in the prevention and treatment of prostrate cancer. Furthermore, it has been discovered that compounds of the invention are useful in the prevention and treatment of androgen-independent cancers such as androgen-independent prostrate cancer. Finally, inventive compounds may be used to treat antiandrogen induced withdrawal syndrome.

Abstract: The instant invention provides potent antiandrogen compounds, such as 3?-acetoxyandrost-1,5-diene-17-ethylene ketal and 3?-hydroxyandrost-1,5-diene-17-ethylene ketal, and methods for their use in the prevention and treatment of biological conditions mediated by androgen receptors. Thus, for example, compounds of the invention are useful in the prevention and treatment of prostrate cancer. Furthermore, it has been discovered that compounds of the invention are useful in the prevention and treatment of androgen-independent cancers such as androgen-independent prostrate cancer. Finally, inventive compounds may be used to treat antiandrogen induced withdrawal syndrome.

Abstract: The invention relates to the use of compounds to treat a number of conditions, such as thrombocytopenia, neutropenia or the delayed effects of radiation therapy. Compounds that can be used in the invention include methyl-2,3,4-trihydroxy-1-O-(7,17-dioxoandrost-5-ene-3?-yl)-?-D-glucopyranosiduronate, 16?,3?-dihydroxy-5?-androstan-17-one or 3,7,16,17-tetrahydroxyandrost-5-ene, 3,7,16,17-tetrahydroxyandrost-4-ene, 3,7,16,17-tetrahydroxyandrost-1-ene or 3,7,16,17-tetrahydroxyandrostane that can be used in the treatment method.