Alnylam Pharmaceuticals Inc. said the 164-patient Helios-A phase III study with next-generation RNAi drug vutrisiran hit its primary endpoint as well as both secondary goals in the treatment of hereditary transthyretin-mediated amyloidosis with polyneuropathy. The primary endpoint was change from baseline in the modified Neuropathy Impairment Score at nine months as compared to historical placebo data from the Apollo phase III study of Alnylam’s Onpattro, cleared by the FDA for ATTR polyneuropathy in August 2018.

Intellia Therapeutics Inc. is looking to disrupt the transthyretin (TTR) amyloidosis (ATTR) market with NTLA-2001, its CRISPR-based treatment designed to be a potential cure for the disease. The drug, which is delivered via a lipid nanoparticle, edits the patient's DNA in vivo to create a stop codon and eliminate the expression of TTR, the protein that aggregates in ATTR patients' nervous systems and hearts, disrupting their functions.