Therapeutic proteins have been increasingly used in recent years to treat cancer, HIV, and other diseases. A challenge with these types of drugs is that the release is rapid and thus the medicine must be administered frequently. Therapeutic proteins have been increasingly used in recent years to treat cancer, HIV, and other diseases. A challenge with these types of drugs is that the release is rapid and thus the medicine must be administered frequently. Biochemistry Polymers Phys.org – latest science and technology news stories