On April 22, 2026 RedHill Biopharma Ltd. (Nasdaq: RDHL) ("RedHill" or the "Company"), a specialty biopharmaceutical company, reported the independent presentation of new preclinical data at the 2026 American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual Meeting, showing positive effects of opaganib as potential add-on therapy in models of neuroblastoma (NB) and triple-negative breast cancer (TNBC).
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The positive NB data, from studies undertaken by Penn State University’s Jeremy Hengst, PhD, and Apogee Biotechnology funded by the Beat Childhood Cancer Foundation and Four Diamonds, indicate that opaganib may enhance the therapeutic efficacy of the oxaliplatin + doxorubicin (OXDOX) chemotherapy combination in high-risk NB. The data showed that opaganib directly destabilized n-Myc, a key oncogenic driver of neuroblastoma and other solid tumors, regulating cell proliferation, differentiation, and apoptosis during embryonic development, a critical factor driving poor outcomes.
A second poster from the University of Kansas’ Colette Worcester describes in vitro model data showing that pre-treatment with opaganib, followed by low-dose diABZI treatment, potentiated the downstream STING-mediated effects and may augment anti-tumor immunity in TNBC, which has the poorest prognosis of the breast cancer subtypes.
Dr. Mark Levitt, Chief Scientific Officer at RedHill said: "These data represent exciting findings that could hold promise for improving outcomes in treating pediatric NB and TNBC, providing additional encouragement for further exploration. Opaganib has previously shown potential as add-on therapy in several preclinical oncology models in combination with chemotherapy. Moreover, the ongoing Phase 2 clinical study of opaganib in combination with darolutamide in advanced prostate cancer could potentially provide paradigm-shifting clinical data in support of the additive use of opaganib in a cancer setting."
Neuroblastoma is the most common infancy cancer with ~5,500 global pediatric cases per year in children aged 0–14. It accounts for 10% of childhood cancers and 15% of pediatric cancer-related deaths in the U.S.5,6 Opaganib received FDA Orphan Drug and Rare Pediatric Disease designations for the treatment of neuroblastoma, a rare pediatric cancer, with potential for a Rare Pediatric Disease Priority Review Voucher ("PRV"). Development discussions for this indication are ongoing with Penn State University and the Beat Childhood Cancer consortium.
About Opaganib (ABC294640)
Opaganib is a proprietary first-in-class investigational, orally administered sphingosine kinase-2 (SPHK2) selective inhibitor drug. Potentially broad-acting, it is in development for multiple oncology, viral, inflammatory, metabolic (diabetes and obesity) and additional indications.
Peer-reviewed data, published in the journal Diabetes, Metabolic Syndrome and Obesity7, provides evidence that opaganib uniquely works through the inhibition of multiple pathways implicated in insulin resistance, β-cell disruption, adipocyte function, inflammation / immune regulation, vascular complications, energy metabolism, induction of autophagy and apoptosis, and disruption of viral replication, through simultaneous inhibition of three sphingolipid-metabolizing enzymes in human cells (SPHK2, DES1 and GCS).
Opaganib has received Orphan Drug designation from the FDA for the treatment of neuroblastoma and cholangiocarcinoma. A Bayer-supported 80-patient placebo-controlled randomized Phase 2 study is ongoing to evaluate the efficacy of opaganib in combination with Bayer’s darolutamide in men with metastatic castrate-resistant prostate cancer (mCRPC), testing the potentially enhancing effect of opaganib in patients with a poor prognosis8. Opaganib also has a Phase 1 chemoradiotherapy study protocol ready for FDA-IND submission.
Opaganib has demonstrated its safety and tolerability profile in more than 470 people in multiple clinical studies and expanded access use, including a large global Phase 2/3 study in hospitalized patients with moderate to severe COVID-19, published in Microorganisms.
(Press release, RedHill Biopharma, APR 22, 2026, View Source [SID1234664690])