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Avila Therapeutics™, Inc., a biotechnology company developing novel targeted covalent drugs, presented results today of preclinical studies that demonstrate its orally-available targeted covalent drug candidate, AVL-192, achieves superior potency against drug-resistant mutations of the Hepatitis C Virus (HCV). These new data were presented today at the Annual Meeting of the American Association for the Study of Liver Diseases (AASLD) international meeting in Boston, Massachusetts.

HCV protease (also known as NS3) is a promising target of intervention for the treatment of hepatitis C infection. However, medicines currently in late stages of clinical development are vulnerable to drug-resistant mutations. AVL-192 is a novel, orally available compound that can rapidly and completely silence the HCV protease through highly selective, irreversible covalent bonding to the target protein. Preclinical data have demonstrated that AVL-192 achieves very high potency and selectivity for NS3 and also potently and effectively inhibits the drug-resistant mutations observed clinically.

Avila's covalent approach to silencing the NS3 protein has resulted in a product candidate with a potential best-in-class profile due to the ability to retain potency against clinically-arising resistance mutations, and potential breadth of activity across HCV genotypes with anticipated once-per-day dosing.

In a poster presentation at the meeting, entitled, "Second Generation of Covalent Irreversible Inhibitors Have Superior Potency Across Genotypes and Drug Resistant Mutants," data were presented from preclinical studies that evaluated the efficacy of AVL-192 in biochemical and cell culture studies. Highlights of the data demonstrate: