Cited by 1,446Genetics and Neurodevelopmental DisordersAutism Spectrum Disorder ResearchGenomics and Rare Diseases

De Novo Gene Disruptions in Children on the Autistic Spectrum

Open access
Iossifov, Ivan, Ronemus, Michael, Levy, Dan, Wang, Zihua, Hakker, Inessa, Rosenbaum, Julie, Yamrom, Boris, Lee, Yoon-ha +27 more·2012·Neuron

Abstract

Exome sequencing of 343 families, each with a single child on the autism spectrum and at least one unaffected sibling, reveal de novo small indels and point substitutions, which come mostly from the paternal line in an age-dependent manner. We do not see significantly greater numbers of de novo missense mutations in affected versus unaffected children, but gene-disrupting mutations (nonsense, splice site, and frame shifts) are twice as frequent, 59 to 28. Based on this differential and the number of recurrent and total targets of gene disruption found in our and similar studies, we estimate between 350 and 400 autism susceptibility genes. Many of the disrupted genes in these studies are associated with the fragile X protein, FMRP, reinforcing links between autism and synaptic plasticity. We find FMRP-associated genes are under greater purifying selection than the remainder of genes and suggest they are especially dosage-sensitive targets of cognitive disorders.

Integrity signals

Registry

Crossref · 10.1016/j.neuron.2012.04.009

Cites

44 of 44 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

0 of 5 cited sources checked · 0 supported · 0 flagged

  • Findingown data

    There is no significantly greater number of de novo missense mutations in affected children compared with unaffected siblings.

    “We do not see significantly greater numbers of de novo missense mutations in affected versus unaffected children”
    Quote in the paperSubstantial claim
  • Findingown data

    A de novo mutation was found in GRM5, a target upstream of FMR1.

    “As a follow-up to this striking observation, we searched for de novo mutations in targets upstream of FMR1 and found an intriguing one: GRM5.”
    Quote in the paperNot a substantial claim
  • Findingown data

    The paper found a remarkable overlap between FMRP-associated genes and their lists of 59 LGD targets and 72 most likely autism candidate genes from de novo CNVs: 14 and 13 with one in common, thus 26/129, with a p value of 10−13.

    “Hence, we checked the list of FMRP-associated genes with our lists of 59 LGD targets and 72 most likely autism candidate genes from de novo CNVs, and found a remarkable overlap: 14 and 13 with one in common, thus 26/129, with a p value of 10−13 determined on a per gene basis (842 FMRP-associated genes out of 25,000 genes).”
    Quote in the paperSubstantial claim
  • Findingown data

    Using a well-annotated set of human genes as controls, FMRP-associated genes are strongly depleted for mutations that affect splicing or introduce stop codons.

    “Using a well-annotated set of human genes as controls, FMRP-associated genes are strongly depleted for mutations that affect splicing or introduce stop codons.”
    Quote in the paperSubstantial claim
  • Findingown data

    The list of genes with disruptive de novo mutations in children with autism shows an unusual coincidence with the list of 842 gene products associated with FMRP.

    “We observe an unusual coincidence between the list of genes with disruptive de novo mutations in children with autism and the list of 842 gene products associated with FMRP”
    Quote in the paperNot a substantial claim
  • May combine two claims. 17
  • The quote only partly states this claim. 2
  • Classified as probably not a substantial claim. 11
  • May combine two claims.

    Findingown data

    The father is more frequently the parent of origin than the mother: 50/17 for SNVs and 6/1 for indels, combined p=10−5.

    “We found that the father is more frequently the parent of origin than the mother: 50/17 for SNVs and 6/1 for indels”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    Five genes were hit twice, and DYRK1A and POGZ are new recurrences found by combining the current data with the three studies.

    “Five genes were hit twice. DYRK1A and POGZ are the new recurrences found by combining our data with theirs.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    A similar depletion of LGDs is seen in human orthologs of mouse genes enriched for essential genes, but not in a set of 250 genes linked to known disabling genetic disorders.

    “We see a similar depletion of LGDs in a set of human orthologs of mouse genes that are enriched for essential genes but we do not see this extreme depletion in a set of 250 genes linked to known disabling genetic disorders.”
    Quote in the paperSubstantial claim
  • The quote only partly states this claim.

    Findingreasoning

    With the 59 from this study, a total of 127 de novo gene disruption hits in probands have been found across the four studies.

    “With the 59 from this study, a total of 127 hits in probands have been found.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

    Findingnone given

    ASH1L, KDM6B, and MLL5 are also FMRP-associated genes.

    “These three are also FMRP-associated genes.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    There was no unusual overlap between FMRP-associated genes and de novo LGD targets in unaffected siblings, or between FMRP-associated genes and de novo missense targets in either affected or unaffected children.

    “We found no unusual overlap between the FMRP-associated genes and de novo LGD targets in unaffected siblings, or between FMRP-associated genes and de novo missense targets in either affected or unaffected children.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    Fifteen of the 68 gene disruptions in the other studies hit FMRP-associated genes, a rate similar to the 14 of 59 observed in this study.

    “However, 15 of their 68 do hit these genes, a rate similar to what we observed (14 of 59).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingnone given

    The GRM5 mutation is a deletion that is not a frame shift but removes a single amino acid and causes an additional substitution at the deletion site.

    “It is hit by a deletion that is not a frame shift but removes a single amino acid and causes an additional substitution at the deletion site.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    A targeted Rims1 mutation in the mouse leads to increased postsynaptic density and impaired associative learning, memory, and cognition.

    “A targeted Rims1 mutation in the mouse leads to increased postsynaptic density and impaired associative learning as well as memory and cognition deficits (Powell et al., 2004; Schoch et al., 2002)”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites Powell et al., 2004 source

      Not checked in the free run.

    • cites Schoch et al., 2002 source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationreasoning

    Children do not necessarily share the same set of genes whose disruption would cause the disorder.

    “Children do not necessarily have the same set of vulnerability genes.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Study design and conductreasoning

    The estimate of 167 vulnerability genes is crude because genes do not have a uniform mutation rate and not every LGD in a target gene is completely penetrant.

    “This of course is only a crude argument because genes do not have a uniform mutation rate, and not every LGD in a target gene will have complete penetrance.”
    Quote in the paperNot a substantial claim
  • Classified as probably not a substantial claim. May combine two claims.

    Study design and conductnone given

    For indel calls, the study used relaxed denovoScr and pEχ2 requirements to 30 and 10−9 but required clean counts: parents had no reads with the candidate indel and at least 15 reads supporting the reference allele; at least one child had 6 or more reads with the candidate allele comprising at least 5% of her reads.

    “For the “Indel filter,” we substantially relaxed the denovoScr and pEχ2 requirements to 30 and 10−9 but insisted on having clean counts: parents were not allowed to have any reads with the candidate indel and were required to have at least 15 reads supporting the reference allele. At least one of the children had to have 6 or more reads with the candidate allele comprising at least 5% of her reads”
    Quote in the paperSubstantial claim
  • Classified as probably not a substantial claim.

    Study design and conductown data

    The study used filter thresholds of denvoScr >= 60 and pEχ2 >= 0.0001 for de novo SNV candidates.

    “We only considered de novo candidates with denvoScr > = 60 and pEχ2>=0.0001.”
    Quote in the paperSubstantial claim
  • Classified as probably not a substantial claim.

    Study design and conductnone given

    Candidate de novo variants were confirmed via a PCR and pooled high-throughput sequencing procedure.

    “Candidate de novo variants were confirmed via a PCR and pooled highthroughput sequencing procedure.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing).

    Interpretationreasoning

    By extension, neuroplasticity might have a general vulnerability to mutation affecting gene dosage.

    “By extension, neuroplasticity, the hallmark function of our nervous system that enables learning and adaption in responses to stimulation, might have a general vulnerability to mutation affecting gene dosage.”
    Quote in the paperNot a substantial claim
  • Classified as probably not a substantial claim. May combine two claims.

    Interpretationreasoning

    It is reasonable to suppose that the physiological mechanisms modulated by FMRP depend on protein concentration, which might be sensitive to gene dosage.

    “Hence, it is reasonable to suppose that the physiological mechanisms modulated by FMRP depend on protein concentration, which in turn might be sensitive to gene dosage.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: FMRP inhibits translation of critical transcripts involved in neuroplasticity.
  • May combine two claims.

    Interpretationnone given

    The overlap is remarkable because half of the LGD targets should not be ASD related, and probably a similar number of the most likely CNV genes.

    “This overlap is remarkable because half of the LGD targets should not be ASD related, and probably a similar number of the most likely CNV genes.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationreasoning

    With this target size and an expected 50% increase in rate of discovery of de novo gene disruptions, similar studies of all 2800 SSC families should yield about 116 autism genes, identifying about a third of the dosage-sensitive gene targets.

    “With this target size, and an expected 50% increase in rate of discovery of de novo gene disruptions, similar studies of all 2800 SSC families should yield about 116 autism genes, thereby identifying unequivocally about a third of the dosage-sensitive gene targets.”
    Quote in the paperSubstantial claim
  • Classified as probably not a substantial claim. May combine two claims.

    Study design and conductown data

    Of 357 families, 343 met coverage targets and passed gender, pedigree, and sample integrity checks, and only those 343 were considered in this report.

    “Three hundred forty-three families met coverage targets and passed gender, pedigree, and sample integrity checks. Only those 343 families were considered in this report.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Study design and conductnone given

    The institutional review board of Cold Spring Harbor Laboratory approved this study, and written informed consent from all subjects was obtained by SFARI.

    “The institutional review board of Cold Spring Harbor Laboratory approved this study, and written informed consent from all subjects was obtained by SFARI.”
    Quote in the paperNot a substantial claim
  • Classified as probably not a substantial claim. May combine two claims.

    Premisecitation

    A set of 842 FMRP-associated genes has been enumerated by HITS-CLIP, and this set was previously noted to overlap candidate genes from de novo CNVs.

    “A set of 842 FMRP-associated genes has been enumerated by cross-linking, immunoprecipitation, and high-throughput sequencing (HITS-CLIP), and this set was previously noted to overlap candidate genes from de novo CNVs (Darnell et al., 2011).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Darnell et al., 2011 source

      Not checked in the free run.

  • May combine two claims. The quote only partly states this claim.

    Study design and conductown data

    The expectation of number of variants per gene was based on the distribution of observed rare synonymous mutations in the 686 parents; 7,051 of 63,080 (11.18%) of all rare synonymous SNVs fell within FMRP-associated genes.

    “Specifically, 7,051 of the 63,080 (or 11.18%) of all rare synonymous SNVs fell within the FMRP-associated genes (Table 6).”
    Quote in the paperSubstantial claim
22 of 22
  • The authors state this as an assumption.

    After zygote formation, the mother's and father's genomes are equally vulnerable to subsequent somatic mutation.

    “We infer this by assuming that after zygote formation, the mother’s and father’s genomes are equally vulnerable to subsequent somatic mutation.”
  • The authors state this as an assumption.

    Genes have a uniform probability of being a target for de novo mutation.

    “If each of G total genes had a uniform probability of being a target for a de novo mutation”
  • The authors state this as an assumption.

    Mutations of the class are completely penetrant.

    “and mutations of the class were completely penetrant”
  • The authors state this as an assumption.

    SNV and indel variants occur randomly across coding regions.

    “Under the assumption that SNV and indel variants occur randomly across coding regions”
  • The paper relies on this without support.

    Fragile X syndrome is a common genetic cause of intellectual disability and many affected children have autistic symptoms.

    “Fragile X syndrome (FXS) is one of the most common genetic causes of intellectual disability, with up to 90% of affected children exhibiting autistic symptoms.”
  • The paper relies on this without support.

    FMR1 is expressed in neurons and controls translation of many products.

    “The FMR1 gene is expressed in neurons and controls the translation of many products.”
  • The paper relies on this without support.

    FMRP inhibits translation of critical transcripts involved in neuroplasticity.

    “FMRP has been proposed to inhibit protein translation of certain critical transcripts involved in neuroplasticity, the coordinated sensitization or desensitization of neurons in response to activity.”
  • The authors state this as an assumption.

    The allele in a read may be incorrectly called once per hundred times, independent for family member and position.

    “In our computations, we use a simple error model in which the allele in a read may be incorrectly called once per hundred times, and is assumed independent for family member and position.”
  • The authors state this as an assumption.

    The rate for a given mutation class in unaffecteds is R and in probands is AR.

    “Assume the rate for a given mutation class in unaffecteds is R, and the rate in probands is AR.”
  • The authors state this as an assumption.

    The genotypes follow a two allele standard autosomal model.

    “The genotypes are assigned based on the likelihood of the 81 possible states given a two allele standard autosomal model”
10 of 10

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?

  • NCKAP1 and eIF4E have been shown to be genetically associated with autism spectrum disorder.

    “the two key CYFIP1 interactors examined here, NCKAP1 and eIF4E, have been shown to be genetically associated with ASD (Iossifov et al., 2012, Neves-Pereira et al., 2009).”

    From CYFIP1 Coordinates mRNA Translation and Cytoskeleton Remodeling to Ensure Proper Dendritic Spine Formation (2013) · cites this paper as Iossifov et al., 2012

    The Discussion’s “Candidate Genes” section (page not supplied) discusses ASD-linked mutations in other genes but does not identify NCKAP1 or eIF4E. Searches for NCKAP1, eIF4E, and their association with autism found no passage in our copy addressing the claimed associations. (LLM, conf=0.73)

    Experimental — accuracy not yet measured
  • CNVs and SNPs have both been reported to play a major role in autism incidence.

    “CNVs and SNPs have both been reported to play a major role in autism incidence (36–41).”
  • In Text S1 we show, using Jensen's Inequality, that the non-uniform distribution of the mutation rates and the relative risks among the ASD risk genes leads to a significant under-estimation of , explaining the discrepancy between our results and those of Iossifov et al.

    “In Text S1 we show, using Jensen's Inequality, that the non-uniform distribution of the mutation rates and the relative risks among the ASD risk genes leads to a significant under-estimation of , explaining the discrepancy between our results and those of Iossifov et al. [4].”
  • In a recent paper using the same de novo data, the number of ASD risk genes was estimated at 370.

    “In a recent paper using the same de novo data, the number of ASD risk genes () was estimated at 370 [4].”
  • Exome sequencing has found de novo single nucleotide variations and indels that segregate with ASD.

    “Exome sequencing has uncovered de novo single nucleotide variations (SNVs) and insertion/deletion (indel) mutations that segregate with ASD.”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

  • Synonymous-variant proportion is stated as a percentage without the percent sign

    Minor

    The proportion is about 0.1118; 11.18 is its percentage value. Elsewhere the paper correctly labels this value 11.18%.

    Reported 11.18 · recomputed 0.111779

1 of 1

Cites

1 retracted

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Iossifov, I., Ronemus, M., Levy, D., Wang, Z., Hakker, I., Rosenbaum, J., Yamrom, B., Lee, Y.-H., Narzisi, G., Leotta, A., Kendall, J., Grabowska, E., Ma, B., Marks, S., Rodgers, L., Stepansky, A., Troge, J., Andrews, P., Bekritsky, M., Pradhan, K., Ghiban, E., Kramer, M., Parla, J., Demeter, R., Fulton, L. L., Fulton, R. S., Magrini, V. J., Ye, K., Darnell, J. C., Darnell, R. B., Mardis, E. R., Wilson, R. K., Schatz, M. C., McCombie, W. R., & Wigler, M.
Affiliations
  • Cold Spring Harbor Laboratory (US)
  • Washington University in St. Louis (US)
  • Albert Einstein College of Medicine (US)
  • Rockefeller University (US)
  • Howard Hughes Medical Institute (US)
Corresponding author
Wigler, Michael
Venue
Neuron
Publisher
Elsevier BV
Published
2012-04
Volume
74
Issue
2
Pages
285-299
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2085198610
Cited by
1,446
References
44
Citations by year
2026: 31 · 2025: 50 · 2024: 64 · 2023: 61 · 2022: 72 · 2021: 91 · 2020: 90 · 2019: 117 · 2018: 103 · 2017: 137 · 2016: 119 · 2015: 143 · 2014: 188 · 2013: 128 · 2012: 48
FWCI
90.90
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • Cold Spring Harbor Laboratory Institutional Repository (Cold Spring Harbor Laboratory) (submittedVersion)
Funders
  • Simons Foundation
  • Simons Foundation Autism Research Initiative
  • National Institutes of Health (5rc2mh090028-02)
  • National Institute of Mental Health (RC2 MH090028, 5RC2MH090028-02)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01HD040647)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomics and Rare Diseases
Keywords
autism spectrum disorder, de novo mutations, gene disruption, nonsense mutation, splice site mutation, frameshift mutation, paternal age, autism susceptibility genes, FMRP, synaptic plasticity, purifying selection, dosage sensitivity, exome sequencing
MeSH terms
Child, Child Development Disorders, Pervasive, Child, Preschool, Family Health, Female, Humans, Male, Models, Molecular, Mutation, Parents, Phenotype, Gene Dosage, Genetic Predisposition to Disease, Fragile X Messenger Ribonucleoprotein 1, Genetic Association Studies

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.

Claims read by deepseek-v4.1-flash under definition version 3 (extract-v3) on 2026-10-05.

Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-10-05.

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