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Polymorphically duplicated genes: their relevance to phenotypic variation in humans.

Paul R Buckland1

  • 1Department of Psychological Medicine, University of Wales College of Medicine, Heath Park, Cardiff, UK. buckland@cf.ac.uk

Annals of Medicine
|September 4, 2003
PubMed
Summary

Gene duplication, though rare, can cause disorders. Polymorphic gene duplication is increasingly recognized and may link to complex disorders and varied phenotypes.

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Area of Science:

  • Genetics
  • Genomic instability
  • Human disease

Background:

  • Gene duplication events are recognized causes of rare genetic disorders.
  • Polymorphic gene duplication, where gene copies vary between individuals, is increasingly identified.
  • Cytogenetic abnormalities like Down syndrome, involving gene duplication, are linked to complex health issues.

Purpose of the Study:

  • To explore the potential role of polymorphic gene duplication in complex disorders.
  • To investigate the association between gene duplication and variable phenotypes.

Main Methods:

  • Review of existing literature on gene duplication.
  • Analysis of genetic and phenotypic data associated with known duplications.
  • Comparative genomics to identify polymorphic duplications.

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Main Results:

  • While rare gene duplications cause specific disorders, polymorphic duplications are common.
  • A growing number of genes are found to be duplicated polymorphically.
  • Phenotypic consequences are not yet established for most polymorphic duplications.
  • Gene duplication from chromosomal abnormalities predisposes individuals to complex disorders.

Conclusions:

  • Polymorphic gene duplication is a significant genetic factor.
  • Further research is warranted to associate specific gene duplications with complex disorders and phenotypes.
  • Gene duplication represents a potential mechanism underlying human disease variability.