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Evaluating Quinacrine as a Potential Amyloid Imaging Compound: Studies on Hen Egg White Lysozyme as Model System

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Amyloid plaque is associated with several neuronal and non-neuronal degenerative diseases. More than twenty human proteins can fold abnormally to form pathological deposits like amyloid plaque. Strategies for treating such diseases include therapies designed to decrease protein plaque formation or its complete clearance, but monitoring/clinical trials of these treatments are limited by the lack of effective methods to monitor amyloid deposits in the organs/tissues of living patients. The current study shows binding and staining ability of quinacrine to protein amyloid deposits, using Hen Egg White Lysozyme (HEWL) as model system and characterization of its binding interaction with HEWL, employing several biophysical techniques. Since quinacrine can pass the blood brain barrier, the current report suggests potential application of quinacrine for antemortem diagnostic of amyloid.
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Keywords: Alzheimer’s disease; Amyloid plaque; FTIR; Parkinson’s Disease; Type II Diabetes Mellitus; fibrillar protein; fluorescence quenching; hen egg white lysozyme; imaging; quinacrine

Document Type: Research Article

Publication date: 2012-08-01

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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