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Related Experiment Videos

Trinucleotide repeats: mechanisms and pathophysiology.

C J Cummings1, H Y Zoghbi

  • 1Program in Cell and Molecular Biology, Department of Pediatrics, Howard Hughes Medical Institute, Baylor College of Medicine, Houston, Texas 77030, USA. cc691520@bcm.tmc.edu

Annual Review of Genomics and Human Genetics
|November 10, 2001
PubMed
Summary

Expansion of unstable trinucleotide repeats causes 14 neurological disorders. This review details the molecular pathology, genes, proteins, and pathophysiology of these trinucleotide repeat diseases.

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Area of Science:

  • Genetics
  • Molecular Biology
  • Neurology

Background:

  • Unstable trinucleotide repeat expansion is a mutational mechanism underlying a growing number of diseases.
  • These diseases are categorized by repeat location: noncoding (untranslated) or coding (exonic).

Purpose of the Study:

  • To review the current understanding of molecular pathology in trinucleotide repeat diseases.
  • To provide insights into the pathogenesis of these neurological disorders.

Main Methods:

  • Literature review of studies on trinucleotide repeat diseases.
  • Summary of clinical presentations, disease genes, and involved proteins.
  • Analysis of research contributing to understanding pathophysiology.

Main Results:

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  • Identification of 14 neurological disorders caused by trinucleotide repeat expansion.
  • Categorization of diseases based on repeat location (noncoding vs. coding).
  • Accumulation of significant knowledge regarding molecular pathology.

Conclusions:

  • Trinucleotide repeat expansion represents a significant class of genetic disorders.
  • Further research is needed to fully elucidate the pathogenesis of these diseases.
  • This review consolidates current knowledge for researchers and clinicians.