Transcriptional regulation of APP by apoE: To boldly go where no isoform has gone before: ApoE, APP transcription and AD: Hypothesised mechanisms and existing knowledge gaps

Bioessays. 2017 Sep;39(9):10.1002/bies.201700062. doi: 10.1002/bies.201700062. Epub 2017 Jul 21.

Abstract

Alzheimer's disease (AD) is the most common form of dementia that gradually disrupts the brain network to impair memory, language and cognition. While the amyloid hypothesis remains the leading proposed mechanism to explain AD pathophysiology, anti-amyloid therapeutic strategies have yet to translate into useful therapies, suggesting that amyloid β-protein and its precursor, the amyloid precursor protein (APP) are but a part of the disease cascade. Further, risk of AD can be modulated by a number of factors, the most impactful being the ɛ4 isoform of apolipoprotein E (apoE). A recent study reported a novel isoform-dependent transcriptional regulation of APP by apoE. These interesting new results add to the myriad of mechanisms that have been proposed to explain how apoE4 enhances AD risk, highlighting the complexities of not only apoE and AD pathophysiology, but also of disease itself. Also see the video abstract here: https://youtu.be/yd14MBdPkCY.

Keywords: APP; Alzheimer's disease; ApoE; Aβ; transcription.

Publication types

  • Review

MeSH terms

  • Alzheimer Disease / genetics*
  • Amyloid beta-Peptides / genetics*
  • Amyloid beta-Protein Precursor / genetics*
  • Animals
  • Apolipoproteins E / genetics*
  • Gene Expression Regulation / genetics*
  • Humans
  • Protein Isoforms / genetics*
  • Transcription, Genetic / genetics*

Substances

  • Amyloid beta-Peptides
  • Amyloid beta-Protein Precursor
  • Apolipoproteins E
  • Protein Isoforms