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    Arrowhead Pharmaceuticals Receives FDA Breakthrough Therapy Designation for Plozasiran

    Arrowhead Pharmaceuticals, Inc. (NASDAQ: ARWR) today announced that the United States Food and Drug Administration (FDA) has granted Breakthrough Therapy designation to investigational plozasiran as an adjunct to diet to reduce triglycerides in adults with familial chylomicronemia syndrome (FCS), a severe and rare genetic disease characterized by extremely high triglyceride levels which can cause acute and potentially fatal pancreatitis. There are currently no approved treatments in the U.S. for FCS.

    “There are currently no FDA-approved therapies to specifically treat FCS, leaving physicians with very few options to help their patients,” said Chris Anzalone, Ph.D., President and CEO of Arrowhead. “Results from clinical studies of investigational plozasiran have been highly encouraging and strongly supportive of further development and commercialization in multiple patient populations. Receiving FDA Breakthrough Therapy designation for plozasiran provides important benefits and the potential to expedite the process of getting plozasiran to the patients who need it.”

    Breakthrough Therapy designation is a process designed to expedite the development and review of drugs that are intended to treat a serious condition and where preliminary clinical evidence indicates that the drug may demonstrate substantial improvement over available therapies on clinically significant endpoints2. Plozasiran has also previously been granted Orphan Drug Designation and Fast Track Designation by the FDA and Orphan Drug Designation by the European Medicines Agency.

    Arrowhead intends to submit a New Drug Application to the FDA by year-end 2024 and plans to seek regulatory approval with additional global regulatory authorities thereafter.

    About Familial Chylomicronemia Syndrome

    Familial chylomicronemia syndrome (FCS) is a severe and rare genetic disease often caused by various monogenic mutations. FCS leads to extremely high triglyceride (TG) levels, typically over 880 mg/dL. Such severe elevations can lead to various serious signs and symptoms including acute and potentially fatal pancreatitis, chronic abdominal pain, diabetes, hepatic steatosis, and cognitive issues. Currently, the therapeutic options that can adequately treat FCS are limited.

    About Plozasiran

    Plozasiran, previously called ARO-APOC3, is a first-in-class investigational RNA interference (RNAi) therapeutic designed to reduce production of apolipoprotein C-III (APOC3) which is a component of triglyceride rich lipoproteins (TRLs) and a key regulator of triglyceride metabolism. APOC3 increases triglyceride levels in the blood by inhibiting breakdown of TRLs by lipoprotein lipase and uptake of TRL remnants by hepatic receptors in the liver. The goal of treatment with plozasiran is to reduce the level of APOC3, thereby reducing triglycerides and restoring lipids to more normal levels.

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    Arrowhead Pharmaceuticals Receives FDA Breakthrough Therapy Designation for Plozasiran Arrowhead Pharmaceuticals, Inc. (NASDAQ: ARWR) today announced that the United States Food and Drug Administration (FDA) has granted Breakthrough Therapy designation to investigational plozasiran as an adjunct to diet to reduce triglycerides in …