The Unfolded Protein Response in Protein Aggregating Diseases

Alexander Gow, Ramaswamy N Sharma

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

For many genetic diseases, clinical phenotypes arise through the dysfunction of the gene products encoded by mutant genes. Effective treatment entails providing a source of the gene product in the diet or circulation, as has been achieved for type I diabetes and hemophilia, or in cases of enzyme deficiency by supplementation with metabolites synthesized by the defective protein, as in adrenoleukodystrophy. However, a growing list of diseases do not appear to be amenable to such treatment strategies. In these instances, defective gene products acquire novel properties that disrupt normal cell function, even in the presence of proteins encoded by the normal allele. One class of such diseases, collectively termed "conformational diseases, " is composed of clinically unrelated disorders that share a common pathophysiology because the mutant proteins cannot adopt stable three-dimensional conformations. These mutant proteins aggregate in various subcellular compartments and may even cause cell death. Some of these diseases are associated with inclusion bodies containing the aggregating proteins whereas others do not exhibit such pathology; however, all appear to activate cell stress signaling pathways. Herein, we highlight one such disorder, Pelizaeus-Merzbacher disease, that disrupts formation of whiter matter in the brain. Accumulation of the mutant protein in oligodendrocytes activates the unfolded protein response. The well-characterized genetics and large number of animal models available for Pelizaeus-Merzbacher disease enables this disease to serve as an important model for conformational diseases, both in terms of defining molecular components of the unfolded protein response signaling pathway as well as testing therapeutic approaches to ameliorate disease.

Original languageEnglish (US)
Pages (from-to)73-94
Number of pages22
JournalNeuroMolecular Medicine
Volume4
Issue number1-2
DOIs
StatePublished - 2003
Externally publishedYes

Fingerprint

Unfolded Protein Response
Pelizaeus-Merzbacher Disease
Mutant Proteins
Proteins
Genes
Adrenoleukodystrophy
Inborn Genetic Diseases
Inclusion Bodies
Oligodendroglia
Hemophilia A
Type 1 Diabetes Mellitus
Cause of Death
Cell Death
Animal Models
Alleles
Pathology
Diet
Phenotype
Brain
Enzymes

Keywords

  • Central nervous system
  • Leukodystrophy
  • Myelin
  • Neurodegeneration
  • Protein trafficking
  • Proteolipid protein

ASJC Scopus subject areas

  • Neuroscience(all)
  • Genetics
  • Cell Biology

Cite this

The Unfolded Protein Response in Protein Aggregating Diseases. / Gow, Alexander; Sharma, Ramaswamy N.

In: NeuroMolecular Medicine, Vol. 4, No. 1-2, 2003, p. 73-94.

Research output: Contribution to journalArticle

Gow, Alexander ; Sharma, Ramaswamy N. / The Unfolded Protein Response in Protein Aggregating Diseases. In: NeuroMolecular Medicine. 2003 ; Vol. 4, No. 1-2. pp. 73-94.
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