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Pharmacological targeting of the β-amyloid precursor protein intracellular domain.

Abstract
Amyloid precursor protein (APP) intracellular domain (AICD) is a product of APP processing with transcriptional modulation activity, whose overexpression causes various Alzheimer's disease (AD)-related dysfunctions. Here we report that 1-(3',4'-dichloro-2-fluoro[1,1'-biphenyl]-4-yl)-cyclopropanecarboxylic acid) (CHF5074), a compound that favorably affects neurodegeneration, neuroinflammation and memory deficit in transgenic mouse models of AD, interacts with the AICD and impairs its nuclear activity. In neuroglioma-APPswe cells, CHF5074 shifted APP cleavage from Aβ42 to the less toxic Aβ38 peptide without affecting APP-C-terminal fragment, nor APP levels. As revealed by photoaffinity labeling, CHF5074 does not interact with γ-secretase, but binds to the AICD and lowers its nuclear translocation. In vivo treatment with CHF5074 reduced AICD occupancy as well as histone H3 acetylation levels and transcriptional output of the AICD-target gene KAI1. The data provide new mechanistic insights on this compound, which is under clinical investigation for AD treatment/prevention, as well as on the contribution of the AICD to AD pathology.
AuthorsCaterina Branca, Ilenia Sarnico, Roberta Ruotolo, Annamaria Lanzillotta, Arturo Roberto Viscomi, Marina Benarese, Vanessa Porrini, Luca Lorenzini, Laura Calzà, Bruno Pietro Imbimbo, Simone Ottonello, Marina Pizzi
JournalScientific reports (Sci Rep) Vol. 4 Pg. 4618 (Apr 09 2014) ISSN: 2045-2322 [Electronic] England
PMID24714650 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • 1-(3',4'-dichloro-2-fluoro(1,1'-biphenyl)-4-yl)cyclopropanecarboxylic acid
  • Amyloid beta-Peptides
  • Amyloid beta-Protein Precursor
  • CD82 protein, human
  • Cyclopropanes
  • Histones
  • Kangai-1 Protein
  • Peptide Fragments
  • amyloid beta-protein (1-42)
  • Flurbiprofen
  • Amyloid Precursor Protein Secretases
Topics
  • Acetylation
  • Alzheimer Disease (drug therapy, prevention & control)
  • Amyloid Precursor Protein Secretases (metabolism)
  • Amyloid beta-Peptides (metabolism)
  • Amyloid beta-Protein Precursor (metabolism)
  • Cell Line, Tumor
  • Cyclopropanes (pharmacology)
  • Flurbiprofen (analogs & derivatives, pharmacology)
  • Histones (metabolism)
  • Humans
  • Kangai-1 Protein (biosynthesis, genetics)
  • Peptide Fragments (metabolism)
  • Protein Structure, Tertiary
  • Transcription, Genetic

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