Cited by 194Autism Spectrum Disorder ResearchGenomic variations and chromosomal abnormalitiesGenetics and Neurodevelopmental Disorders

Patterns of de novo tandem repeat mutations and their role in autism

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Mitra, Ileena, Huang, Bonnie, Mousavi, Nima, Ma, Nichole, Lamkin, Michael, Yanicky, Richard, Shleizer-Burko, Sharona, Lohmueller, Kirk E. +1 more·2021·Nature

Abstract

Autism spectrum disorder (ASD) is an early-onset developmental disorder characterized by deficits in communication and social interaction and restrictive or repetitive behaviours 1,2. Family studies demonstrate that ASD has a substantial genetic basis with contributions both from inherited and de novo variants 3,4. It has been estimated that de novo mutations may contribute to 30% of all simplex cases, in which only a single child is affected per family 5. Tandem repeats (TRs), defined here as sequences of 1 to 20 base pairs in size repeated consecutively, comprise one of the major sources of de novo mutations in humans 6. TR expansions are implicated in dozens of neurological and psychiatric disorders 7. Yet, de novo TR mutations have not been characterized on a genome-wide scale, and their contribution to ASD remains unexplored. Here we develop new bioinformatics methods for identifying and prioritizing de novo TR mutations from sequencing data and perform a genome-wide characterization of de novo TR mutations in ASD-affected probands and unaffected siblings. We infer specific mutation events and their precise changes in repeat number, and primarily focus on more prevalent stepwise copy number changes rather than large expansions. Our results demonstrate a significant genome-wide excess of TR mutations in ASD probands. Mutations in probands tend to be larger, enriched in fetal brain regulatory regions, and are predicted to be more evolutionarily deleterious. Overall, our results highlight the importance of considering repeat variants in future studies of de novo mutations.

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  • Emerging evidence suggests a role for other classes of genetic variants (e.g., rare inherited and de novo tandem repeats) in autism.

    “yet emerging evidence suggests a role for other classes (for example, rare inherited and de novo tandem repeats) of genetic variants as well17,19,60,61.”

    From Genetic correlates of phenotypic heterogeneity in autism (2022) · cites this paper as [61]

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  1. [35]Li H Aligning sequence reads, clone sequences and assembly contigs with BWA-MEM. arXiv: Genomics (2013).

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Authors
Mitra, I., Huang, B., Mousavi, N., Ma, N., Lamkin, M., Yanicky, R., Shleizer-Burko, S., Lohmueller, K. E., & Gymrek, M.
Affiliations
  • University of California San Diego (US)
  • University of California, Los Angeles (US)
Corresponding author
  • Lohmueller, Kirk E.
  • Gymrek, Melissa
Venue
Nature
Published
2021-01-13
Volume
589
Issue
7841
Pages
246-250
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W3119240720
Cited by
194
References
48
Citations by year
2026: 24 · 2025: 40 · 2024: 33 · 2023: 39 · 2022: 37 · 2021: 19 · 2020: 1 · 2012: 1
FWCI
17.92
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • National Institutes of Health (5r21hg010070-02, DP5OD024577)
  • National Human Genome Research Institute (R21 HG010070, R01HG010149)
  • National Institute of General Medical Sciences (T32GM008806, R35GM119856)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomic variations and chromosomal abnormalities
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
Keywords
autism spectrum disorder, de novo mutations, copy number alterations, repeat expansion, unaffected siblings
MeSH terms
Autism Spectrum Disorder, Adolescent, Adult, Brain, Child, Female, Fetus, Humans, Male, Middle Aged, Paternal Age, Least-Squares Analysis, Germ-Line Mutation, Genetic Predisposition to Disease, DNA Repeat Expansion, Young Adult, DNA Copy Number Variations

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