お知らせ • Jun 22
Entera Bio Receives Positive FDA Feedback on 12-Month Registrational Phase 3 Study for EB613
Entera Bio Ltd. has received positive feedback from the U.S. Food and Drug Administration (FDA) on its Phase 3 registrational protocol for EB613 (oral PTH(1-34), teriparatide), the first oral anabolic (bone-building) tablet in development for the treatment of osteoporosis. The FDA feedback is in response to a Clinical Amendment submitted by Entera to its Investigational New Drug (IND) application, as announced in March 2026. The FDA accepted Entera’s plan to conduct a single, randomized, double-blind, placebo-controlled, Phase 3 trial in approximately 750 postmenopausal women with osteoporosis, with a primary endpoint of percent change from baseline in total hip BMD at Month 12 to support a potential New Drug Application (NDA) submission for EB613 for the treatment of women with post-menopausal osteoporosis. The proposed NDA package will also include Entera’s scientific bridge analysis with Forteo® (teriparatide SC injection, Eli Lilly) under the 505(b)(2) pathway, and a transiliac crest bone biopsy sub-study in a subset of patients. The FDA also agreed with Entera’s proposal to continue following the randomized patients out to 24 months in an open-label extension study under a separate protocol. Entera will plan to submit data through up to 18 months as part of the 120-day safety update to its NDA. Additionally, Entera will submit the complete 2-year data upon completion of the open-label extension study to characterize further the durability of the treatment effect, safety, and sequence data for EB613 followed by a standard anti-resorptive therapy for 12 months. The registrational study is powered to demonstrate EB613’s clinical effectiveness with projected increases in total hip BMD that are comparable to reported outcomes for Forteo® at 12 months, changes associated with a 60% to 80% relative reduction in vertebral fracture risk. Entera completed a placebo-controlled, 6-month, Phase 2 study of EB613 in 161 postmenopausal women. The study met its primary (PD/bone turnover biomarker) and secondary (BMD) endpoints, with statistically significant increases in BMD at the lumbar spine, total hip, and femoral neck (JBMR 2024). The increase in total hip BMD in this study was comparable to what has been reported for Forteo® at 6-months. Most recently, at ENDO 2026, comparative Phase 1 data presented as a Late-Breaking Oral Presentation demonstrated that the single tablet of EB613 achieved a pharmacokinetic and pharmacodynamic profile comparable to both the multi-tablet EB613 evaluated in the Phase 2 study and Forteo®. The Company plans to initiate the registrational Phase 3 study in late 2026, with topline results anticipated in the second half of 2028. Substantial evidence supports the efficacy of anabolic therapies over bisphosphonates for lowering fracture risk in osteoporosis patients at high risk. However, all available anabolic therapies are administered by subcutaneous (SC) injection and used in a minority of eligible patients. Entera’s EB613 program (oral PTH(1-34), teriparatide) is being developed as the first oral, once-daily anabolic tablet treatment for osteoporosis. Entera completed a Phase 2, 6-month, 161-patient, placebo-controlled study that met all biomarker and BMD endpoints without significant safety concerns in women with postmenopausal osteoporosis or low BMD (JBMR 2024). EB613 produced rapid dose-proportional increases in biochemical markers of bone formation, reductions in markers of bone resorption, and increases in lumbar spine, total hip, and femoral neck BMD. The effects of EB613 on trabecular and cortical bone using 3D-DXA showed increases with EB613 compared to placebo on a variety of indices, including integral volumetric BMD and trabecular volumetric BMD, cortical thickness, and cortical surface BMD. Mechanistically, the findings suggest that bone strengthening and fracture resistance may occur rapidly with EB613. Furthermore, the data are consistent with that of published subcutaneous teriparatide at the 6-month time point.