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Study reveals how the world's first drug for amyloid disease works
Date:5/29/2012

LA JOLLA, CA May 29, 2012 Scientists from The Scripps Research Institute and Pfizer Inc. have published a new study showing how a new drug called tafamidis (Vyndaqel) works. Tafamidis, approved for use in Europe and currently under review by the US Food and Drug Administration (FDA), is the first medication approved by a major regulatory agency to treat an amyloid disease, a class of conditions that include Alzheimer's.

Tafamidis treats a deadly nerve disease caused by transthyretin (TTR) amyloid fibril formation, or the accumulation of abnormal assemblies of the TTR protein. The drug inhibits TTR aggregation, and clinical trials have shown that it delays the typical progression of nerve destruction in polyneuropathy patients.

"The details in this new paper, combined with clinical trial data, show for the first time that an amyloid disease can be successfully treated by reducing the rate of amyloid formation," said Jeffery W. Kelly, chair of the Department of Molecular and Experimental Medicine, the Lita Annenberg Hazen Professor of Chemistry, and member of the Skaggs Institute for Chemical Biology at Scripps Research. Kelly is a senior author of the new paper, which appears in an advance, online Early Edition issue of Proceedings of the National Academy of Sciences on May 29, 2012.

An Array of Progressive Symptoms

While the naturally occurring or "wild type" transthyretin protein is prone to aggregate in older people causing cardiac disease, a variety of destabilizing mutations lead either to a primary cardiomyopathy or to early onset forms of polyneuropathy, known as TTR familial amyloid polyneuropathy, affecting about 10,000 people worldwide.

Familial amyloid polyneuropathy compromises the peripheral and autonomic nervous systems, with symptoms including sensory deprivation and pain, muscle weakness and wasting, and alternating constipation and diarrhea. In some familial amyloid polyneuropath
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Contact: Mika Ono
mikaono@scripps.edu
858-784-2052
Scripps Research Institute
Source:Eurekalert  

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