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Related Experiment Videos

Evidence for a second genetic locus in Carney complex

A D Irvine1, D K Armstrong, E A Bingham

  • 1Department of Medical Genetics, Queen's University Belfast, Belfast City Hospital, Lisburn Road, Belfast BT9 7AB, U.K. airvine.newtbred@dnet.co.uk

The British Journal of Dermatology
|January 20, 1999
PubMed
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Carney complex, a genetic disorder, was mapped to chromosome 2p16. However, linkage analysis in two families showed no association, indicating genetic heterogeneity in Carney complex.

Area of Science:

  • Genetics
  • Endocrinology
  • Dermatology

Background:

  • Carney complex is an autosomal dominant disorder characterized by lentiginosis, myxomas, and endocrine tumors.
  • A specific genetic locus for Carney complex has been identified on chromosome 2p16.

Purpose of the Study:

  • To investigate the genetic basis of Carney complex in two Northern Irish families.
  • To determine if the previously mapped locus on chromosome 2p16 is associated with Carney complex in these families.

Main Methods:

  • Family-based linkage analysis was performed.
  • Five highly informative dinucleotide repeat markers in the 2p16 region were utilized.
  • Genetic linkage was assessed using logarithm of odds (LOD) scores.

Main Results:

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  • All tested dinucleotide repeat markers showed negative LOD scores across all recombination fractions.
  • No significant linkage was found between the markers on chromosome 2p16 and Carney complex in the studied families.

Conclusions:

  • The findings suggest that the Carney complex locus on chromosome 2p16 is not responsible for the disorder in these two families.
  • Carney complex exhibits genetic heterogeneity, with different genetic loci potentially causing the condition in various families.