Cited by 508Genetic Associations and EpidemiologyGenomics and Rare DiseasesForensic and Genetic Research

A strategy to discover genes that carry multi-allelic or mono-allelic risk for common diseases: A cohort allelic sums test (CAST)

Open access
Morgenthaler, Stephan, Thilly, William G.·2007·Mutation Research - Fundamental and Molecular Mechanisms of Mutagenesis

Abstract

A method is described to discover if a gene carries one or more allelic mutations that confer risk for any specified common disease. The method does not depend upon genetic linkage of risk-conferring mutations to high frequency genetic markers such as single nucleotide polymorphisms. Instead, the sums of allelic mutation frequencies in case and control cohorts are determined and a statistical test is applied to discover if the difference in these sums is greater than would be expected by chance. A statistical model is presented that defines the ability of such tests to detect significant gene-disease relationships as a function of case and control cohort sizes and key confounding variables: zygosity and genicity, environmental risk factors, errors in diagnosis, limits to mutant detection, linkage of neutral and risk-conferring mutations, ethnic diversity in the general population and the expectation that among all exonic mutants in the human genome greater than 90% will be neutral with regard to any effect on disease risk. Means to test the null hypothesis for, and determine the statistical power of, each test are provided. For this "cohort allelic sums test" or "CAST", the statistical model and test are provided as an Excel program, CASTAT(c) at . Based on genetics, technology and statistics, a strategy of enumerating the mutant alleles carried in the exons and splice sites of the estimated approximately 25,000 human genes in case cohort samples of 10,000 persons for each of 100 common diseases is proposed and evaluated: A wide range of possible conditions of multi-allelic or mono-allelic and monogenic, multigenic or polygenic (including epistatic) risk are found to be detectable using the statistical criteria of 1 or 10 "false positive" gene associations approximately 25,000 gene-disease pair-wise trials and a statistical power of >0.8. Using estimates of the distribution of both neutral and gene-inactivating nondeleterious mutations in humans and the sensitivity of the test to multigenic or multicausal risk, it is estimated that about 80% of nullizygous, heterozygous and functionally dominant gene-common disease associations may be discovered. Limitations include relative insensitivity of CAST to about 60% of possible associations given homozygous (wild type) risk and, more rarely, other stochastic limits when the frequency of mutations in the case cohort approaches that of the control cohort and biases such as absence of genetic risk masked by risk derived from a shared cultural environment.

Integrity signals

Registry

Crossref · 10.1016/j.mrfmmm.2006.09.003

Cites

50 of 50 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Collapsing sets of rare variants into a single group and testing their collective frequency differences can overcome the power issues associated with testing rare variants individually.

    “In order to overcome power issues associated with testing rare variants individually, one could ‘collapse’ sets of rare variants into a single group and test their collective frequency differences between cases and controls.28, 30”
  • The CAST method as first proposed does not easily accommodate covariates, cannot be used with quantitative phenotypes, and does not consider weighting of variants using variant frequency or functional annotations.

    “The method as first proposed does not easily accommodate covariates, cannot be used with quantitative phenotypes, and does not consider weighting of the variants using, for example, variant frequency or functional annotations.”

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Morgenthaler, S., & Thilly, W. G.
Affiliations
  • École Polytechnique Fédérale de Lausanne (CH)
  • Massachusetts Institute of Technology (US)
Corresponding author
Thilly, William G.
Venue
Mutation Research - Fundamental and Molecular Mechanisms of Mutagenesis
Publisher
Elsevier BV
Published
2007-02
Volume
615
Issue
1-2
Pages
28-56
ISSN
  • 0027-5107 (ISSN-L)
  • 1386-1964
OpenAlex
W1971102564
Cited by
507
References
50
Citations by year
2026: 6 · 2025: 14 · 2024: 17 · 2023: 27 · 2022: 15 · 2021: 18 · 2020: 23 · 2019: 40 · 2018: 35 · 2017: 28 · 2016: 46 · 2015: 43 · 2014: 52 · 2013: 49 · 2012: 41
FWCI
1.33
Type
journal article
Language
en
Open access
Locations
  • Mutation research. Fundamental and molecular mechanisms of mutagenesis (publishedVersion)
  • PubMed (publishedVersion)
  • Infoscience (Ecole Polytechnique Fédérale de Lausanne) (submittedVersion)
  • Infoscience (Ecole Polytechnique Fédérale de Lausanne) (submittedVersion, cc-by-nc-nd)
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 › Forensic and Genetic Research
Keywords
CAST, gene-disease association, common diseases, statistical power, false positive rate, zygosity, polygenic risk, epistasis, heterozygous mutation, statistical models
MeSH terms
Alleles, Analysis of Variance, Biometry, Ethnicity, Genes, Dominant, Genetic Techniques, Genetics, Population, Heterozygote, Homozygote, Humans, Models, Genetic, Mutation, Risk Factors, United States, Models, Statistical, Cohort Studies, Case-Control Studies, Gene Deletion, Genetic Predisposition to Disease

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review