Isis Pharmaceuticals Inc was incorporated in California in 1989, and in January 1991 the Company changed its state of incorporation to Delaware. The Company is engaged in antisense drug discovery and development, exploiting a novel drug discovery platform it created to generate a pipeline of first-in-class drugs. Antisense technology provides a direct route from genomics to drugs. The Company business segments are Drug Discovery and Development operations. Its flagship product, KYNAMRO (mipomersen sodium) injection, is on the market in the United States for patients with homozygous familial hypercholesterolemia, or HoFH. Patients with HoFH are at high cardiovascular risk and cannot reduce their low-density lipoprotein cholesterol, or LDL-C, sufficiently with currently available lipid-lowering therapies. The Company has a pipeline of 31 drugs in development. Company's ISIS-TTR and ISIS-SMN drugs are in late stage development. Its partners include Biogen Idec, AstraZeneca and Roche. The Company's drugs compete with existing therapies for market share. It also competes with specialized pharmaceutical firms and large pharmaceutical companies acting either independently or together with biopharmaceutical companies. The Company is subject to regulation under the Occupational Safety and Health Act, the Toxic Substances Control Act, the Resource Conservation and Recovery Act and other present and potential future federal, state and local regulations.