Corcept Therapeutics Reports Phase 3 ROSELLA Trial Results As Relacorilant Plus Nab-Paclitaxel Improves Survival In Platinum-Resistant Ovarian Cancer Without Added Side Effects, Showing 30% Reduced Progression Risk And 31% Lower Death Risk In ASCO 2025 Late-Breaker And Simultaneous Lancet Publication

• Relacorilant plus nab-paclitaxel improves progression-free and overall survival in patients with platinum-resistant ovarian cancer, with no need for biomarker selection
• Addition of relacorilant did not increase side-effects, compared to nab-paclitaxel monotherapy
• Results presented in late-breaking podium presentation at ASCO 2025 with simultaneous publication in The Lancet

Corcept Therapeutics Incorporated (NASDAQ:CORT), a commercial-stage company engaged in the discovery and development of medications to treat severe endocrinologic, oncologic, metabolic and neurologic disorders by modulating the effects of the hormone cortisol, today shared data from its pivotal Phase 3 ROSELLA trial of relacorilant plus nab-paclitaxel in patients with platinum-resistant ovarian cancer in a late-breaking oral presentation at the ASCO 2025 (American Society of Clinical Oncology) Annual Meeting.

The presentation abstract can be found here and the presentation slides here. The data have been simultaneously published in The Lancet, titled "Relacorilant and nab-paclitaxel in patients with platinum-resistant ovarian cancer (ROSELLA): an open-label, randomised, controlled, phase 3 trial."

ROSELLA met its primary endpoint of improved progression-free survival as assessed by blinded independent central review (PFS-BICR). Patients who received relacorilant in addition to nab-paclitaxel chemotherapy experienced a 30 percent reduction in risk of disease progression compared to patients who received nab-paclitaxel monotherapy (hazard ratio: 0.70; p-value: 0.0076). Median PFS-BICR was extended to 6.5 months, compared to 5.5 months in patients who received nab-paclitaxel alone. In addition, PFS assessed by investigators was consistent with PFS-BICR, with a hazard ratio of 0.71 (p-value: 0.0030). An interim analysis of overall survival (OS), showed that the addition of relacorilant reduced the risk of death by 31 percent, substantially lengthening patients' lives. Median OS for patients who received relacorilant was 16.0 months, compared to 11.5 months for patients who received nab-paclitaxel alone (hazard ratio: 0.69; p-value: 0.0121). These benefits were seen in all clinically relevant subgroups, including those with poor prognoses.

Relacorilant plus nab-paclitaxel was well-tolerated, with a comparable safety profile between treatment arms. The addition of relacorilant did not increase patients' safety burden. In addition, patients treated with relacorilant plus nab-paclitaxel had a lower incidence of ascites (5.3 percent), than did patients who received nab-paclitaxel alone (10.5 percent). The occurrence of abdominal paracenteses during treatment was also lower for patients treated with relacorilant plus nab-paclitaxel (7.4 percent), compared to nab-paclitaxel alone (13.2 percent).