Arno wobbling as it questions if onapristone has a future
US biopharma Arno Therapeutics (OTCQB: ARNI) had lost nearly 22% of its already limited value by mid-morning on Thursday, after it announced that it was not going to enroll the remaining three patients in a Phase II trial.
The trial is a study of onapristone in combination with abiraterone acetate in men with advanced castration-resistant prostate cancer (CRPC) who have failed with the latter drug alone.
There were hopes that the combination of onapristone and abiraterone acetate, which is sold under the brand name Zytiga by subsidiaries of the US health care giant Johnson & Johnson (NYSE: JNJ), would provide a potential new treatment for men with prostate cancer and a significant opportunity for Arno.
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