On May 18, 2022, Assembly Biosciences, Inc. (the “Company”) was notified by Antios Therapeutics, Inc. (“Antios”) that ATI-2173, Antios’s investigational proprietary active site polymerase inhibitor nucleotide, has been placed on clinical hold by the U.S. Food and Drug Administration following submission of a safety report involving a patient who received a triple combination of the Company’s lead core inhibitor, vebicorvir, ATI-2173 and a nucleos(t)ide analog reverse transcriptase inhibitor.
Effective May 20, 2022, because of the clinical hold, the Company terminated the Clinical Trial Collaboration Agreement between the Company and Antios.