Cited by 181Genetic Associations and EpidemiologyGenomics and Rare DiseasesGenetic Mapping and Diversity in Plants and Animals

Once and Again—Issues Surrounding Replication in Genetic Association Studies

Hirschhorn, Joel N., Altshuler, David·2002·The Journal of Clinical Endocrinology & Metabolism

Abstract

Over the last 15 yr, genes responsible for hundreds of inherited human diseases have been identified, enabling clinical diagnosis and the potential for therapeutic intervention. Until very recently, however, success has been limited to so-called monogenic disorders, diseases in which mutation of a single gene is both necessary and sufficient to cause disease in any given individual. Because such mutations are strictly co-inherited with disease, it is possible to use linkage analysis to identify their chromosomal location by analyzing which of a genome-wide set of markers segregates with disease in families. Genes contained within such linked regions become positional “candidates” and are next examined for mutations in affected individuals. For any such candidate gene, proof of causality typically depends on two additional lines of evidence. First, the putative causal changes should be found only in affected individuals. Second, one hopes for a “smoking gun”—that the disease-associated mutations are obviously deleterious to protein function (due to truncation or deletion of a coding region or alteration of a highly conserved residue). Success is typically declared when these criteria are all satisfied: the putative disease gene 1) is located in a chromosomal region that co-segregates with disease in affected families, 2) contains multiple independent mutations that are perfectly associated with disease status in the families, and 3) whose characteristics obviously alter protein function.

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Crossref · 10.1210/jc.2002-021329

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  • Rare nonsynonymous mutations in MC4R are found in patients with extreme early-onset obesity.

    “Rare nonsynonymous mutations in MC4R are found in patients with extreme early-onset obesity (129).”

    From Genetic Mapping in Human Disease (2008) · cites this paper as [129]

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Authors
Hirschhorn, J. N., & Altshuler, D.
Affiliations
  • Boston Children's Hospital (US)
  • Harvard University (US)
Venue
The Journal of Clinical Endocrinology & Metabolism
Published
2002-10
Volume
87
Issue
10
Pages
4438-4441
ISSN
  • 0021-972X (ISSN-L)
  • 1945-7197
OpenAlex
W2071348149
Cited by
181
References
14
Citations by year
2026: 2 · 2025: 2 · 2024: 1 · 2023: 1 · 2022: 2 · 2021: 2 · 2020: 1 · 2019: 3 · 2018: 2 · 2017: 1 · 2016: 2 · 2015: 5 · 2014: 5 · 2013: 6 · 2012: 6
FWCI
9.05
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Clinical Endocrinology & Metabolism (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomics and Rare Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Mapping and Diversity in Plants and Animals
Keywords
genetic association studies, replication, monogenic disorders, linkage analysis, candidate genes, pathogenic variants, protein function
MeSH terms
Chromosome Mapping, Humans, Genetic Linkage, Mutation, Obesity, Proteins, Receptors, Corticotropin, Chromosome Segregation, Genetic Diseases, Inborn, Receptor, Melanocortin, Type 4

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