Zai Lab Starts Phase 3 Trial of ZL-2306 as First-Line Maintenance Therapy for Ovarian Cancer

Zai Lab Starts Phase 3 Trial of ZL-2306 as First-Line Maintenance Therapy for Ovarian Cancer
A Phase 3 clinical trial testing the investigational medication ZL-2306 (niraparib) as a maintenance therapy for ovarian cancer patients who are responding to their first-line chemotherapy has dosed its first participant, Zai Lab announced. Niraparib is already available in the U.S. and EU under the brand name Zejula (by Tesaro) for the maintenance of ovarian cancer patients who have had a complete or partial response to platinum-based chemotherapy. The approvals, however, are only for women who have received at least two prior chemotherapy regimens, and whose cancer returned after one of them. ZL-2306 is an inhibitor of PARP proteins, which participate in DNA repair and other cellular mechanisms. Because certain tumors use PARP-mediated DNA repair for survival, PARP inhibition induces their death and makes them more sensitive to DNA-damaging agents. The randomized, double-blind, placebo-controlled Phase 3 trial, to be conducted at multiple sites in China, will evaluate if once-daily ZL-2306 delays cancer progression or relapse in patients who are responding — either partially or completely — to first-line platinum-based chemotherapy. Other PARP inhibitors have shown promise in this setting, when given to ovarian cancer patients with inherited mutations in their BRCA genes. But Z
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