New Insights to Clathrin and Adaptor Protein 2 for the Design and Development of Therapeutic StrategiesReport as inadecuate




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1

Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej, 10C, Aarhus 8000, Denmark

2

Institute of Biomedicine, Aarhus University, Bartholins Alle’, 6, Aarhus 8000, Denmark





*

Author to whom correspondence should be addressed.



Academic Editor: Amal Kaddoumi

Abstract The Amyloid Precursor Protein APP has been extensively studied for its role as the precursor of the β-amyloid protein Aβ in Alzheimer’s disease AD. However, our understanding of the normal function of APP is still patchy. Emerging evidence indicates that a dysfunction in APP trafficking and degradation can be responsible for neuronal deficits and progressive degeneration in humans. We recently reported that the Y682 mutation in the 682YENPTY687 domain of APP affects its binding to specific adaptor proteins and leads to its anomalous trafficking, to defects in the autophagy machinery and to neuronal degeneration. In order to identify adaptors that influence APP function, we performed pull-down experiments followed by quantitative mass spectrometry MS on hippocampal tissue extracts of three month-old mice incubated with either the 682YENPTY687 peptide, its mutated form, 682GENPTY687 or its phosphorylated form, 682pYENPTY687. Our experiments resulted in the identification of two proteins involved in APP internalization and trafficking: Clathrin heavy chain hc and its Adaptor Protein 2 AP-2. Overall our results consolidate and refine the importance of Y682 in APP normal functions from an animal model of premature aging and dementia. Additionally, they open the perspective to consider Clathrin hc and AP-2 as potential targets for the design and development of new therapeutic strategies. View Full-Text

Keywords: Clathrin heavy chain; APP; 682YENPTY687; AICD; AP-2; Alzheimer’s disease Clathrin heavy chain; APP; 682YENPTY687; AICD; AP-2; Alzheimer’s disease





Author: Ebbe Toftgaard Poulsen 1, Agnete Larsen 2, Alen Zollo 2, Arne L. Jørgensen 2, Kristian W. Sanggaard 1, Jan J. Enghild 1 and Carmela Matrone 2,*

Source: http://mdpi.com/



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