Agenix said it had filed an international method of manufacture patent application under the Patent Cooperation Treaty (PCT) for its hepatitis B drug AGX-1009. The application covers the manufacturing process of a compound that uses the same active ingredient, Tenofovir, used in the US Food and Drug Administration (US FDA) approved drug marketed by Gilead Sciences under the trade name Viread.
The international application aims to provide further long-term protection for the company’s platform hepatitis B drug compounds through until 2030. Agenix already has a registered patent to protect the AGX-1009 compound in China through to 2026. Like Viread, AGX-1009 is a so-called ‘prodrug’ of Tenofovir. Gilead’s ‘prodrug’ of Tenofovir was approved for treatment of hepatitis B in the US in 2008 and in numerous countries globally but is not yet approved in China. Both drugs contain Tenofovir but have different molecular side chains to activate that compound. Both drugs work by blocking an enzyme the hepatitis virus needs to replicate.