Isis Pharmaceuticals Files Patent Infringement Suit Against Santaris Pharma

Isis Pharmaceuticals, Inc. (NASDAQ: ISIS) announced today it has filed a patent infringement lawsuit against Santaris Pharma A/S and Santaris Pharma A/S Corp. in the United States District Court of the Southern District of California.  Isis' infringement suit against Santaris is based upon Santaris' activities providing antisense drugs and antisense drug discovery services to several pharmaceutical companies.  As alleged in the complaint, these activities are not protected under the exemption from patent infringement for drug development.