Omeros Corporation Announces Upcoming Presentations at ASH Annual Meeting - November 2, 2023

02 Nov 2023
Phase 1Phase 2ASH
-- New and Updated Data from Ongoing Phase 2 Study of OMS906 in Paroxysmal Nocturnal Hemoglobinuria Selected for Podium Presentation -- SEATTLE--(BUSINESS WIRE)-- Omeros Corporation (Nasdaq: OMER) today announced that two abstracts directed to OMS906, Omeros’ investigational inhibitor of MASP-3, the key activator of the alternative pathway of complement, will be presented at the 65th Annual Meeting of the American Society of Hematology (ASH), to be held December 9-12, 2023 in San Diego. Both abstracts were published today and are now available on the ASH website at . Details of the congress presentations are found below. OMS906, a Novel Alternative Pathway MASP-3 Inhibitor, Normalizes Hemoglobin Levels and Increases Clone Size in Treatment-Naïve PNH Patients (Abstract #573) Session Name: 508. Bone Marrow Failure: Acquired: Unraveling the Future of PNH Therapy from Clinical Trials Date: Sunday, December 10, 2023 Podium Presentation Time: 5:00 p.m. PT Location: San Diego Convention Center, Room 7 Alternative Pathway MASP-3 Inhibitor OMS906 Effectively and Potently Inhibits Complement-Mediated Hemolysis in Preclinical Models Mechanistically Similar to Paroxysmal Nocturnal Hemoglobinuria (Abstract #4082) Session Name: 508. Bone Marrow Failure: Acquired: Poster III Date: Monday, December 11, 2023 Presentation Time: 6:00 p.m. - 8:00 p.m. PT Location: San Diego Convention Center, Halls G-H The presentation materials associated with each abstract will be made available on Omeros’ website at following the congress presentations. About OMS906 OMS906 is an investigational human monoclonal antibody targeting mannan-binding lectin-associated serine protease-3 (MASP-3), the key activator of the complement system’s alternative pathway. The complement system plays a central role in inflammation and becomes activated as a result of tissue damage or microbial infection. Responsible for the conversion of pro-complement factor D to complement factor D, MASP-3 is believed to be the premier target in the alternative pathway – it has the lowest native circulating level and low relative clearance compared to the other alternative pathway proteins and, unlike C5 and C3 blockers, MASP-3 inhibition leaves intact the lytic arm of the classical pathway, important for fighting infection. Also, unlike other components of the alternative pathway, MASP-3 is believed not to be an acute phase reactant, which could provide a significant advantage to MASP-3 inhibitors, like OMS906, over other alternative pathway inhibitors. MASP-3 inhibitors are thought to have preventive or therapeutic effects across a broad range of diseases including paroxysmal nocturnal hemoglobinuria (PNH), hemolytic uremic syndrome (HUS), atypical HUS, traumatic brain injury, arthritis, wet age-related macular degeneration, ischemia-reperfusion injury, transplant-related complications and other immune-related disorders. About Omeros Corporation Omeros is an innovative biopharmaceutical company committed to discovering, developing and commercializing small-molecule and protein therapeutics for large-market and orphan indications targeting immunologic disorders including complement-mediated diseases, cancers, and addictive and compulsive disorders. Omeros’ lead MASP-2 inhibitorMASP-2 inhibitor narsoplimab targets the lectin pathway of complement and is the subject of a biologics license application (BLA) pending before FDA for the treatment of hematopoietic stem cell transplant-associated thrombotic microangiopathy (HSCT-TMA). Omeros’ long-acting MASP-2 inhibitorMASP-2 inhibitor OMS1029 is currently in a Phase 1 clinical trial. OMS906, Omeros’ inhibitor of MASP-3, the key activator of the alternative pathway of complement, is advancing in clinical programs for paroxysmal nocturnal hemoglobinuria (PNH), complement 3 (C3) glomerulopathy. Funded by the National Institute on Drug Abuse, Omeros’ lead phosphodiesterase 7 (PDE7) inhibitor OMS527 is in clinical development for the treatment of cocaine use disorder (CUD) and is also being developed as a therapeutic for other addictions as well as for a major complication of treatment for movement disorders. Omeros also is advancing a broad portfolio of novel immuno-oncology programs comprised of two cellular and three molecular platforms. For more information about Omeros and its programs, visit
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