Karyopharm Therapeutics NDA for Multiple Myeloma

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FDA has accepted for priority review a Karyopharm Therapeutics NDA that is seeking accelerated approval for selinexor, an oral SINE compound indicated for treating patients with penta-refractory multiple myeloma. The agency has set a user fee review action target date of 4/6/2019.

 

Karyopharm says Selinexor functions by binding with and inhibiting the nuclear export protein XPO1 (also called CRM1), leading to the accumulation of tumor suppressor proteins in the cell nucleus. This reinitiates and amplifies their tumor suppressor function and is believed to lead to the selective induction of apoptosis in cancer cells, while mostly sparing normal cells, it says.


The submission is based on clinical data from over 2,600 patients who have been treated with selinexor. Last month, Karyopharm reported positive top-line data from the Phase 2b STORM study evaluating selinexor in combination with low-dose dexamethasone in patients with penta-refractory multiple myeloma. The overall response rate for patients treated with oral selinexor and dexamethasone was 26.2% with median duration of response 4.4 months, and a median overall survival across the entire study of 8.6 months, according to the company.

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