Trial Results Unlikely to Support sNDA Approval: FDA
Karyopharm Therapeutics says that during a recent meeting with FDA officials, the officials expressed doubt that the results of the SIENDO trial would support approval of an sNDA for the company’s selinexor (Xpovio) as front-line maintenance therapy following chemotherapy in patients with advanced or recurrent endometrial cancer. “Karyopharm and the FDA participants had differing views on the study significance and overall clinical benefit for the whole population and discussed that further exploration of patients with advanced or recurrent endometrial cancer with p53 wild-type is warranted,” the company says. “The company will continue to collect and analyze the SIENDO study data and work with FDA to explore all regulatory pathways for patients with p53 wild-type.”
Karyopharm also says it will start a new study of selinexor in patients with p53 wild-type endometrial cancer.
Xpovio is described as a first-in-class, oral exportin 1 (XPO1) inhibitor. It is the first of Karyopharm’s Selective Inhibitor of Nuclear Export compounds to be approved to treat cancer. It functions by selectively binding to and inhibiting the nuclear export protein XPO1 and is approved in the U.S. for multiple oncology indications.