Global gene profiling of VCP-associated inclusion body myopathy

Clin Transl Sci. 2012 Jun;5(3):226-34. doi: 10.1111/j.1752-8062.2012.00407.x. Epub 2012 Apr 4.

Abstract

Inclusion body myopathy associated with Paget's disease of bone and frontotemporal dementia (IBMPFD) is an autosomal dominant disorder caused by mutations in the Valosin-containing protein (VCP) gene on chromosome 9p12-13. Patients demonstrate limb girdle muscle weakness, which eventually progresses to involve respiratory muscles, and death from respiratory and cardiac failure. This is the first investigation to analyze key molecular mediators and signaling cascades in skeletal muscle causing myopathy by global gene microarray in hopes of understanding the dysregulated genes and molecular mechanisms underlying IBMPFD and the hope of finding novel therapeutic targets. We determined expression profiles using Human Genome Array microarray technology in Vastus lateralis muscles from patients and their first-degree relatives. We analyzed gene annotations by Database for Annotation, Visualization and Integration Discovery and identified differentially dysregulated genes with roles in several novel biological pathways, including regulation of actin cytoskeleton, ErbB signaling, cancer, in addition to regulation of autophagy, and lysosomal signaling, known disrupted pathways in VCP disease. In this report, we present data from the first global microarray analyzing IBMPFD patient muscles and elucidating dysregulated pathways to further understand the pathogenesis of the disease and discover potential therapeutics.

Publication types

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

MeSH terms

  • Adenosine Triphosphatases / genetics
  • Adenosine Triphosphatases / metabolism
  • Adult
  • Case-Control Studies
  • Cell Cycle Proteins / genetics
  • Cell Cycle Proteins / metabolism
  • Female
  • Gene Expression Profiling*
  • Gene Regulatory Networks / genetics
  • Humans
  • Male
  • Middle Aged
  • Myositis, Inclusion Body / genetics*
  • Oligonucleotide Array Sequence Analysis
  • Reproducibility of Results
  • Reverse Transcriptase Polymerase Chain Reaction
  • Signal Transduction / genetics
  • Valosin Containing Protein

Substances

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