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

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

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  • 1Department of Neurology, Washington University School of Medicine, Saint Louis, MO 63110, USA.

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.

PMID:
20410287
[PubMed - indexed for MEDLINE]
PMCID:
PMC2875057
Free PMC Article
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