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Mendelian phenotypes in The Netherlands

J B Verheij1, L P ten Kate

  • 1Department of Medical Genetics, University of Groningen, The Netherlands.

Human Heredity
|July 1, 1993
PubMed
Summary

This study details a database of Mendelian phenotypes in the Netherlands, analyzing their inheritance patterns (autosomal dominant, autosomal recessive, X-linked) and frequencies. Findings reveal significant differences compared to international databases, highlighting unique genetic characteristics.

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Area of Science:

  • Human Genetics
  • Medical Informatics
  • Population Genetics

Background:

  • Mendelian phenotypes are crucial for understanding genetic disorders.
  • Comprehensive databases are needed to track the prevalence and origin of these phenotypes.
  • Previous catalogs lacked detailed analysis of specific national or regional populations.

Purpose of the Study:

  • To create and quantitatively analyze a database of Mendelian phenotypes in the Netherlands.
  • To determine the frequency and origin of these phenotypes based on their mode of inheritance.
  • To compare the Dutch phenotype distribution with a global catalog (McKusick's Mendelian Inheritance in Man).

Main Methods:

  • Compiled a database of Mendelian phenotypes reported in accessible sources from the Netherlands.
  • Categorized phenotypes by inheritance: autosomal dominant (AD), autosomal recessive (AR), and X-linked.
  • Performed quantitative analysis of the database and compared results with McKusick's catalog (MIM).

Main Results:

  • The database included 1,482 references up to January 1, 1991, describing at least 672 different loci.
  • Phenotype distribution: 47.8% AD, 42.1% AR, and 10.1% X-linked.
  • A significant difference (p < 0.01) was observed in phenotype distribution compared to MIM (61.7% AD, 31.5% AR, 6.8% X-linked), with 2.5% of loci unique to the Dutch database.

Conclusions:

  • The Dutch population exhibits a distinct distribution of Mendelian phenotypes compared to the global catalog.
  • The database provides valuable insights into the genetic landscape of Mendelian disorders in the Netherlands.
  • Includes Dutch prevalence data for 38 monogenic disorders and 24 polymorphic systems.

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