By Saabira Chaudhuri 
 

Isis Pharmaceuticals Inc. (ISIS) said it has received fast-track designation from the U.S. Food and Drug Administration for the treatment for familial amyloid polyneuropathy, a type of genetic disease.

ISIS-TTR is an antisense drug in development with GlaxoSmithKline PLC (GSK) for the treatment of transthyretin amyloidosis, a severe and rare genetic disease characterized by progressive dysfunction of peripheral nerve and/or heart tissues.

"ISIS-TTR is our most advanced drug from our severe and rare disease franchise and represents a significant near-term commercial opportunity for us," Chief Financial Officer B. Lynne Parshall said. "We look forward to continuing to move ISIS-TTR toward the market for patients who have very limited therapeutic options."

The ISIS-TTR drug is part of an agreement between Isis and Glaxo to develop RNA therapeutics for rare and infectious diseases.

The companies recently amended the clinical development plan and financial terms relating to ISIS-TTR to support a registration-directed Phase 2/3 clinical study, expected to start this month.

When the study begins, Isis will receive a $7.5 million milestone payment and is eligible to earn an additional $50 million in pre-licensing milestone payments to support the study. In addition, Isis said it is eligible to receive regulatory and sales milestones and double-digit royalties on sales of ISIS-TTR.

Isis earlier this week struck a deal with AstraZeneca PLC (AZN, AZN.LN) to develop novel generation antisense therapeutics against five cancer targets that includes a license to develop ISIS-STAT3, a drug Isis is currently evaluating in an early clinical trial in patients with advanced lymphomas.

Also this week, Isis inked a deal with Biogen Idec (BIIB) to discover and develop antisense drugs against three undisclosed targets to treat neurological or neuromuscular disorders that could see Isis receive over $630 million.

Shares closed Wednesday at $9.57 and were inactive in recent premarket trading. The stock has risen 40% in the past year.

Write to Saabira Chaudhuri at saabira.chaudhuri@dowjones.com

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