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New protein structure could help treat Alzheimer's, related diseases
Date:7/28/2014

There is no cure for Alzheimer's disease and other forms of dementia, but the research community is one step closer to finding treatment.

University of Washington bioengineers have a designed a peptide structure that can stop the harmful changes of the body's normal proteins into a state that's linked to widespread diseases such as Alzheimer's, Parkinson's, heart disease, Type 2 diabetes and Lou Gehrig's disease. The synthetic molecule blocks these proteins as they shift from their normal state into an abnormally folded form by targeting a toxic intermediate phase.

The discovery of a protein blocker could lead to ways to diagnose and even treat a large swath of diseases that are hard to pin down and rarely have a cure.

"If you can truly catch and neutralize the toxic version of these proteins, then you hopefully never get any further damage in the body," said senior author Valerie Daggett, a UW professor of bioengineering. "What's critical with this and what has never been done before is that a single peptide sequence will work against the toxic versions of a number of different amyloid proteins and peptides, regardless of their amino acid sequence or the normal 3-D structures."

The findings were published online this month in the journal eLife.

More than 40 illnesses known as amyloid diseases Alzheimer's, Parkinson's and rheumatoid arthritis are a few are linked to the buildup of proteins after they have transformed from their normally folded, biologically active forms to abnormally folded, grouped deposits called fibrils or plaques. This happens naturally as we age, to a certain extent our bodies don't break down proteins as quickly as they should, causing higher concentrations in some parts of the body.

Each amyloid disease has a unique, abnormally folded protein or peptide structure, but often such diseases are misdiagnosed because symptoms can be similar and pinpointing which protein is pr
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Contact: Michelle Ma
mcma@uw.edu
206-543-2580
University of Washington
Source:Eurekalert  

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New protein structure could help treat Alzheimer's, related diseases
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