PTC Therapeutics Announces Additional Results from Phase 2 Study of PTC124 in Duchenne Muscular...(lude the initiation of longer-term studi...),Health

Date:10/18/2007

lude the initiation of longer-term studies in DMD and cystic fibrosis (CF) as well as additional proof of concept studies in other indications. We hope that PTC124 will one day offer an improved treatment option for patients with nonsense-mediated DMD, CF, and a broad range of genetic disorders."

About Duchenne Muscular Dystrophy

Duchenne muscular dystrophy (DMD) is a progressive muscle disorder that causes the loss of both muscle function and independence. DMD is perhaps the most prevalent of the muscular dystrophies and is the most common lethal genetic disorder diagnosed during childhood today. Each year, approximately 20,000 children worldwide are born with DMD (one of every 3,500 male children). More information regarding DMD is available through the Muscular Dystrophy Association (http://www.mdausa.org) and the Parent Project Muscular Dystrophy (http://www.parentprojectmd.org).

About PTC124

PTC124 is an orally delivered investigational new drug in Phase 2 clinical development for the treatment of genetic disorders due to nonsense mutations. Nonsense mutations are single-point alterations in the genetic code that prematurely halt the translation process, producing a shortened, non- functional protein. PTC124 has restored production of full-length, functional proteins in preclinical genetic disease models harboring nonsense mutations. In Phase 1 clinical trials, PTC124 was generally well tolerated, achieved target plasma concentrations that have been associated with activity in preclinical models and did not induce ribosomal read through of normal stop codons. PTC is currently conducting Phase 2 clinical trials of PTC124 in nonsense-mutation-mediated cystic fibrosis (CF) and Duchenne muscular dystrophy (DMD).

It is estimated that 10% of the cases of CF and 13% of the cases of DMD are due to nonsense mutations. PTC believes th
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SOURCE PTC Therapeutics, Inc. Copyright©2007 PR Newswire. All rights reserved

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