Inclusion body myopathy, Paget's disease of the bone and fronto-temporal dementia: a disorder of autophagy

Hum Mol Genet. 2010 Apr 15;19(R1):R38-45. doi: 10.1093/hmg/ddq157. Epub 2010 Apr 21.

Abstract

Inclusion body myopathy associated with Paget's disease of the bone and fronto-temporal dementia (IBMPFD) is a progressive autosomal dominant disorder caused by mutations in p97/VCP (valosin-containing protein). p97/VCP is a member of the AAA+ (ATPase associated with a variety of activities) protein family and participates in multiple cellular processes. One particularly important role for p97/VCP is facilitating intracellular protein degradation. p97/VCP has traditionally been thought to mediate the ubiquitin-proteasome degradation of proteins; however, recent studies challenge this dogma. p97/VCP clearly participates in the degradation of aggregate-prone proteins, a process principally mediated by autophagy. In addition, IBMPFD mutations in p97/VCP lead to accumulation of autophagic structures in patient and transgenic animal tissue. This is likely due to a defect in p97/VCP-mediated autophagosome maturation. The following review will discuss the evidence for p97/VCP in autophagy and how a disruption in this process contributes to IBMPFD pathogenesis.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Adenosine Triphosphatases / genetics
  • Adenosine Triphosphatases / physiology
  • Autophagy*
  • Cell Cycle Proteins / genetics
  • Cell Cycle Proteins / physiology
  • Frontotemporal Dementia / complications*
  • Frontotemporal Dementia / genetics
  • Homeostasis
  • Humans
  • Mutation
  • Myositis, Inclusion Body / complications*
  • Myositis, Inclusion Body / genetics
  • Osteitis Deformans / complications*
  • Osteitis Deformans / genetics
  • Valosin Containing Protein

Substances

  • Cell Cycle Proteins
  • Adenosine Triphosphatases
  • VCP protein, human
  • Valosin Containing Protein