Pyrroloquinoline quinone inhibits the fibrillation of amyloid proteins

Prion. Jan-Mar 2010;4(1):26-31. doi: 10.4161/pri.4.1.10889. Epub 2010 Jan 4.


Several neurodegenerative diseases involve the selective damage of neuron cells resulting from the accumulation of amyloid fibril formation. Considering that the formation of amyloid fibrils as well as their precursor oligomers is cytotoxic, the agents that prevent the formation of oligomers and/or fibrils might allow the development of a novel therapeutic approach to neurodegenerative diseases. Here, we show pyrroloquinoline quinone (PQQ) inhibits the amyloid fibril formation of the amyloid proteins, amyloid beta (1-42) and mouse prion protein. The fibril formation of mouse prion protein in the presence of PQQ was dramatically prevented. Similarly, the fibril formation of amyloid beta (1-42) also decreased. With further advanced pharmacological approaches, PQQ may become a leading anti-neurodegenerative compound in the treatment of neurodegenerative diseases.

MeSH terms

  • Amyloid / chemistry
  • Amyloid / metabolism*
  • Animals
  • Humans
  • Mice
  • Molecular Structure
  • Neurodegenerative Diseases / drug therapy
  • PQQ Cofactor / chemistry
  • PQQ Cofactor / pharmacology*
  • PQQ Cofactor / therapeutic use


  • Amyloid
  • PQQ Cofactor