– EDELWEISS 3 trial of Yselty® expected to report topline data as planned in Q4:21-
GENEVA, Switzerland and BOSTON, MA – May 4, 2021 – ObsEva SA (NASDAQ: OBSV) (SIX: OBSN), a biopharmaceutical company developing and commercializing novel therapies to improve women’s reproductive health, today announced that it has completed enrollment for the Phase 3 EDELWEISS 3 trial of Yeslty® for patients with moderate to severe endometriosis-associated pain (EAP). Enrollment completion is an important milestone, and data from the primary endpoint readout are expected in Q4 2021.
“Endometriosis is an emotionally and physically painful condition that affects approximately 176 million women worldwide and can be debilitating for many women. We continue to be in need of alternative treatment options that improve quality of life,” said Jacques Donnez, M.D., Ph.D., Distinguished Professor of Obstetrics and Gynecology at the Catholic University of Louvain, Belgium. “The Phase 2b EDELWEISS data underscored Yselty’s potential to address this critical unmet need while offering unique dosing options. Importantly, linzagolix 75mg dose significantly improved EAP symptoms at 12 weeks and these effects were maintained or increased at 24 weeks and 52 weeks, without clinically relevant decreases in bone mineral density. This is particularly encouraging, and I look forward to seeing additional informative data from the EDELWEISS 3 trial.”
EDELWEISS 3 (Europe and the US) is a randomized, double-blind, placebo-controlled, Phase 3 trial that enrolled 486 women with moderate to severe EAP. The study is designed to evaluate the long-term efficacy and safety of Yselty, with a co-primary endpoint of reduction in both dysmenorrhea (menstrual pain) and non-menstrual pelvic pain at Month 3, along with stable or decreased use of analgesics for EAP. The study includes a 75 mg once-daily dose without hormonal ABT (1 mg estradiol / 0.5mg norethindrone acetate), and a 200 mg once-daily dose in combination with ABT. Subjects who complete the initial six-month treatment period will have the option to enter a six-month treatment extension, followed by a post-treatment follow-up. Additional information about this study can be found here.
“The clinical development of Yselty for our endometriosis indication is a key priority for ObsEva, and we are pleased that the pivotal Phase 3 EDELWEISS 3 trial has continued to progress as planned,” said Brian O’Callaghan, CEO of ObsEva. “This milestone reflects significant progress and builds on the encouraging data from our Phase 2b trial, which demonstrated sustained improvement in overall endometriosis symptoms. With enrollment now completed for our Phase 3 trial, we are one step closer to providing women with better long-term treatment options. We will continue to build on this momentum and look forward to sharing top-line results later this year.”
Yselty® (linzagolix) is a novel, oral, once daily, GnRH receptor antagonist with a potentially best-in-class profile. Yselty is currently in late-stage clinical development for the treatment of heavy menstrual bleeding associated with uterine fibroids and pain associated with endometriosis. ObsEva licensed Yselty from Kissei in late 2015 and retains worldwide commercial rights, excluding Asia, for the product.
Yselty® is a registered trademark owned by Kissei for use by ObsEva. Yselty® is not yet approved for use anywhere in the world.
ObsEva is a biopharmaceutical company developing and commercializing novel therapies to improve women’s reproductive health and pregnancy. Through strategic in-licensing and disciplined drug development, ObsEva has established a late-stage clinical pipeline with development programs focused on treating endometriosis, uterine fibroids and preterm labor. ObsEva is listed on the Nasdaq Global Select Market and is trading under the ticker symbol “OBSV” and on the SIX Swiss Exchange where it is trading under the ticker symbol “OBSN”. For more information, please visit www.ObsEva.com.
Kissei is a Japanese pharmaceutical company with approximately 70 years of history, specialized in the field of urology, kidney-dialysis and Unmet Medical Needs. Silodosin is a Kissei product for the treatment of the signs and symptoms of benign prostatic hyperplasia which is sold worldwide through its licensees. KLH-2109/OBE2109 is a new chemical entity discovered by Kissei R&D.
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