Cited by 711Genetic Associations and EpidemiologyGenetic Mapping and Diversity in Plants and AnimalsForensic and Genetic Research

The allelic architecture of human disease genes: common disease-common variant... or not?

Pritchard, J. K.·2002·Human Molecular Genetics

Abstract

Linkage disequilibrium (LD) plays a central role in current and proposed methods for mapping complex disease genes. LD-based methods work best when there is a single susceptibility allele at any given disease locus, and generally perform very poorly if there is substantial allelic heterogeneity. The extent of allelic heterogeneity at typical complex disease loci is not yet known, but predictions about allelic heterogeneity have important implications for the design of future mapping studies, including the proposed genome-wide association studies. In this article, we review the available data and models relating to the number and frequencies of susceptibility alleles at complex disease loci-the 'allelic architecture' of human disease genes. We also show that the predicted frequency spectrum of disease variants at a gene depends crucially on the method of ascertainment, for example from prior linkage scans or from surveys of functional candidate loci.

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Crossref · 10.1093/hmg/11.20.2417

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  • The common disease-common variant hypothesis has been refuted by the missing heritability problem.

    “When GWAS began the field was dominated by the simple common disease-common variant (CD-CV) hypothesis1–4 has been refuted in light of the so-called ‘missing heritability problem’”

    From Rare and common variants: twenty arguments (2012) · cites this paper as [3]

  • Because disease reduces fitness, variants that promote disease should be selected against and therefore should not be common.

    “Since disease is deleterious to fitness, variants that promote disease should be selected against, and hence disease-promoting variants should not be common3,26,27.”

    From Rare and common variants: twenty arguments (2012) · cites this paper as [3]

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Authors
Pritchard, J. K.
Affiliations
University of Chicago (US)
Corresponding author
Pritchard, J. K.
Venue
Human Molecular Genetics
Published
2002-10-01
Volume
11
Issue
20
Pages
2417-2423
ISSN
  • 0964-6906 (ISSN-L)
  • 1460-2083
OpenAlex
W2157929834
Cited by
711
References
40
Citations by year
2026: 4 · 2025: 10 · 2024: 7 · 2023: 10 · 2022: 16 · 2021: 17 · 2020: 17 · 2019: 21 · 2018: 21 · 2017: 21 · 2016: 27 · 2015: 23 · 2014: 38 · 2013: 44 · 2012: 44
FWCI
18.37
Type
journal article
Language
en
Open access
closed
Locations
  • Human Molecular Genetics (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Mapping and Diversity in Plants and Animals
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Forensic and Genetic Research
Keywords
allelic heterogeneity, linkage disequilibrium, risk alleles, allele frequency spectrum, genome-wide association study, disease mapping, ascertainment bias
MeSH terms
Alleles, Humans, Models, Theoretical, Linkage Disequilibrium

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