Biological Spectrum of Amyotrophic Lateral Sclerosis Prions

Cold Spring Harb Perspect Med. 2017 Nov 1;7(11):a024133. doi: 10.1101/cshperspect.a024133.


Amyotrophic lateral sclerosis (ALS) and frontotemporal lobar dementia (FTLD) are two neurodegenerative diseases with distinct clinical features but common genetic causes and neuropathological signatures. Ten years after the RNA-binding protein TDP-43 was discovered as the main protein in the cytoplasmic inclusions that characterize ALS and FTLD, their pathogenic mechanisms have never seemed more complex. Indeed, discoveries of the past decade have revolutionized our understanding of these diseases, highlighting their genetic heterogeneity and the involvement of protein-RNA assemblies in their pathogenesis. Importantly, these assemblies serve as the foci of protein misfolding and mature into insoluble structures, which further recruit native proteins, turning them into misfolded forms. This self-perpetuating mechanism is a twisted version of classical prion replication that leads to amplification of pathological protein complexes that spread throughout the neuraxis, offering a pathogenic principle that underlies the rapid disease progression that characterizes ALS and FTLD.

Publication types

  • Review

MeSH terms

  • Amyotrophic Lateral Sclerosis / genetics*
  • Amyotrophic Lateral Sclerosis / metabolism
  • Animals
  • C9orf72 Protein / genetics*
  • DNA-Binding Proteins / genetics*
  • DNA-Binding Proteins / metabolism
  • Disease Models, Animal
  • Frontotemporal Dementia / genetics*
  • Frontotemporal Dementia / metabolism
  • Humans
  • Inclusion Bodies / pathology
  • Mice
  • Mutation
  • Rats


  • C9orf72 Protein
  • DNA-Binding Proteins
  • TARDBP protein, human