Fourth Drug to Enter Development Under Broad Strategic Collaboration

CARLSBAD, CA, USA I February 5, 2015 I Isis Pharmaceuticals, Inc. (NASDAQ: ISIS) announced today that it has earned a $10 million milestone payment from Biogen Idec for initiating the investigational new drug (IND)-supporting studies of ISIS-BIIB4Rx.  ISIS-BIIB4Rx is a recently identified development candidate designed to inhibit an undisclosed target to treat a neurodegenerative disease.  ISIS-BIIB4Rx is the fourth drug to enter development as part of Isis’ broad collaboration with Biogen Idec and is a distinct target and disease indication from ISIS-BIIB3Rx, which entered development in late 2014.

“Our collaboration with Biogen Idec is one of the most productive collaborations we have.  We have significantly expanded the application of our technology in neurology, and we now have four drugs in development as part of our broad Biogen Idec collaboration.  As each of these programs advances, not only will we continue to earn additional milestone payments, but we will also continue to benefit from Biogen Idec’s active participation in these programs, lending their resources and expertise,” said C. Frank Bennett, Ph.D., senior vice president of research at Isis Pharmaceuticals. 

As ISIS-BIIB4Rx advances in development, Isis is eligible to receive up to $249 million in additional milestone payments and a license fee, including amounts related to the costs of clinical trials.  In addition, Isis is eligible to receive double-digit royalties from sales of ISIS-BIIB4Rx

ABOUT ISIS and BIOGEN IDEC
Biogen Idec and Isis have a broad strategic alliance focused on leveraging antisense technology to advance the treatment of neurological and neuromuscular disorders. This alliance combines Isis’ expertise in antisense technology to evaluate potential neurological targets and discover antisense drugs with Biogen Idec’s capability to develop therapies for neurological disorders.  Isis is primarily responsible for drug discovery and early development of antisense therapies.  Biogen Idec has the option to license each antisense program at a particular stage in development.  Current development-stage programs include antisense drugs to treat patients with spinal muscular atrophy (SMA), ISIS-SMNRx, myotonic dystrophy type 1 (DM1), ISIS-DMPKRx, and two undisclosed neurodegenerative diseases, ISIS-BIIB3Rx, and ISIS-BIIB4Rx.  In addition to these four drugs, Isis and Biogen Idec have numerous opportunities to evaluate additional targets for the development of drugs to treat neurological disorders.

ABOUT ISIS PHARMACEUTICALS, INC.
Isis is exploiting its leadership position in RNA-targeted technology to discover and develop novel drugs for its product pipeline and for its partners.  Isis’ broad pipeline consists of 34 drugs to treat a wide variety of diseases with an emphasis on cardiovascular, metabolic, severe and rare diseases, including neurological disorders, and cancer.  Isis’ partner, Genzyme, is commercializing Isis’ lead product, KYNAMRO®, in the United States and other countries for the treatment of patients with homozygous FH.  Isis has numerous drugs in Phase 3 development in severe/rare diseases and cardiovascular diseases.  These include ISIS-APOCIIIRx, a drug Isis is developing through its wholly owned subsidiary, Akcea Therapeutics, to treat patients with severely high triglycerides, such as patients with familial chylomicronemia syndrome; ISIS-TTRRx, a drug Isis is developing with GSK to treat patients with the polyneuropathy form of TTR amyloidosis; and, ISIS-SMNRx, a drug Isis is developing with Biogen Idec to treat infants and children with spinal muscular atrophy, a severe and rare neuromuscular disease.  Isis’ patents provide strong and extensive protection for its drugs and technology.  Additional information about Isis is available at www.isispharm.com.

SOURCE: ISIS Pharmaceuticals