Cited by 737Autism Spectrum Disorder ResearchGenetics and Neurodevelopmental DisordersGenomic variations and chromosomal abnormalities

Identifying autism loci and genes by tracing recent shared ancestry

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Morrow, Eric M., Yoo, Seung-Yun, Flavell, Steven W., Kim, Tae-Kyung, Lin, Yingxi, Hill, Robert Sean, Mukaddes, Nahit M., Balkhy, Soher +17 more·2008·Science

Abstract

To find inherited causes of autism-spectrum disorders, we studied families in which parents share ancestors, enhancing the role of inherited factors. We mapped several loci, some containing large, inherited, homozygous deletions that are likely mutations. The largest deletions implicated genes, including PCDH10 ( protocadherin 10 ) and DIA1 ( deleted in autism1 , or c3orf58) , whose level of expression changes in response to neuronal activity, a marker of genes involved in synaptic changes that underlie learning. A subset of genes, including NHE9 ( Na + /H + exchanger 9 ), showed additional potential mutations in patients with unrelated parents. Our findings highlight the utility of “homozygosity mapping” in heterogeneous disorders like autism but also suggest that defective regulation of gene expression after neural activity may be a mechanism common to seemingly diverse autism mutations.

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  • The broader protein family that includes CDH13 has been linked to ASD pathogenesis by CNV studies, homozygosity mapping, common variant findings, and the paper's pathway analysis.

    “the larger family of proteins has been implicated in ASD pathogenesis through CNV studies (Glessner et al., 2009), homozygosity mapping (Morrow et al., 2008), common variant findings (Wang et al., 2009), and our pathway analysis (Figure 6)”
  • Only 3% of the transcriptome is expressed in an activity-dependent manner, but a much larger fraction of ASD-implicated genes show activity-dependent expression.

    “The idea that defects in activity-induced gene expression contribute to ASD was initially based on a provocative realization: while only 3% of the transcriptome is expressed in an activity-dependent manner, a far greater percentage of ASD implicated genes display activity-dependent expression (Kelleher and Bear, 2008; Morrow et al., 2008).”
  • Studies have implicated homozygous copy number variants and long homozygous intervals as significantly associated with ASDs.

    “Additional evidence supporting a role of biallelic mutations comes from studies that have implicated homozygous CNVs (Levy et al., 2011; Morrow et al., 2008) and long homozygous intervals as significantly associated with ASDs (Casey et al., 2012).”

    From Using Whole-Exome Sequencing to Identify Inherited Causes of Autism (2013) · cites this paper as Morrow et al., 2008

  • The data demonstrate that biallelic hypomorphic mutations underlie at least a subset of ASDs.

    “Our data combine WES with segregation analysis to demonstrate that biallelic, hypomorphic mutations underlie at least a subset of ASDs (Chahrour et al., 2012; Morrow et al., 2008).”

    From Using Whole-Exome Sequencing to Identify Inherited Causes of Autism (2013) · cites this paper as Morrow et al., 2008

  • Only about 3% of the neuronal transcriptome is altered by membrane depolarization, but a higher percentage of ASD-implicated genes are regulated by neuronal activity.

    “Only about 3% of the neuronal transcriptome is altered when the membrane is depolarized, but a higher percentage of the genes that are implicated in ASD have been shown to be regulated by neuronal activity, it has been proposed, therefore, that ASD may result, at least in part, from the disruption of the activity-dependent signalling networks that control gene transcription34,35.”

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Authors
Morrow, E. M., Yoo, S.-Y., Flavell, S. W., Kim, T.-K., Lin, Y., Hill, R. S., Mukaddes, N. M., Balkhy, S., Gascon, G., Hashmi, A., Al-Saad, S., Ware, J., Joseph, R. M., Greenblatt, R., Gleason, D., Ertelt, J. A., Apse, K. A., Bodell, A., Partlow, J. N., Barry, B., Yao, H., Markianos, K., Ferland, R. J., Greenberg, M. E., & Walsh, C. A.
Affiliations
Broad Institute (US)
Venue
Science
Published
2008-07-11
Volume
321
Issue
5886
Pages
218-223
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2158778721
Cited by
737
References
44
Citations by year
2026: 11 · 2025: 13 · 2024: 12 · 2023: 11 · 2022: 24 · 2021: 26 · 2020: 39 · 2019: 25 · 2018: 30 · 2017: 37 · 2016: 43 · 2015: 34 · 2014: 47 · 2013: 74 · 2012: 55
FWCI
44.24
Type
journal article
Language
en
Open access
Locations
  • Science (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Open Access System for Information Sharing (Pohang University of Science and Technology) (submittedVersion)
Funders
  • Howard Hughes Medical Institute
  • National Institutes of Health (n01hg065403-000, 5r01ns048276-15)
  • National Institute of Mental Health (R01MH083565, K01MH071801, K23MH080954, MH 64547, 1K01MH71801, R01MH064547)
  • National Human Genome Research Institute (N01 HG-65403)
  • National Institute of Neurological Disorders and Stroke (5R01NS048276-05, R01-NS-048276)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (P30HD018655)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomic variations and chromosomal abnormalities
Keywords
autism spectrum disorder, homozygosity mapping, shared ancestry, homozygous deletion, PCDH10, Dia1, NHE9, inherited mutations, synaptic gene expression, neuronal activity, gene expression regulation, genetic loci
MeSH terms
Formins, Protocadherins, Animals, Autistic Disorder, Brain, Chromosome Mapping, Consanguinity, Female, Gene Expression Regulation, Genes, Recessive, Homozygote, Humans, Lod Score, Male, Mutation, Neurons, Pedigree, Transcription Factors, Cadherins, Gene Deletion, Sodium-Hydrogen Exchangers, Gene Dosage, Genetic Predisposition to Disease, Oligonucleotide Array Sequence Analysis, Polymorphism, Single Nucleotide, Adaptor Proteins, Signal Transducing, Rats

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