The present disclosure provides compositions, markers, and methods for diagnosing and treating cancer and other conditions. The method includes administering at least one androgen deprivation therapy to the subject; and administering a therapeutically effective amount of at least one inhibitor to the subject, wherein the at least one inhibitor is selected from the group including: at least one macropinocytosis inhibitor, at least one glutamine metabolism inhibitor, at least one glutaminase inhibitor, and any combinations thereof.
