Copy number variation

Recent articles

Research image of SYNGAP protein in the mouse cortex.

Gene replacement therapy normalizes some traits in SYNGAP1 model mice

The first published virus-based gene therapy for SYNGAP1 deletion yields benefits despite the gene’s long length and complexity.

By Charles Q. Choi
20 November 2025 | 5 min read
Research image visualizing copy number variant duplications and deletions tied to certain brain regions in people with diagnoses of schizophrenia and autism.

Autism-linked copy number variants always boost autism likelihood

By contrast, varied doses of the same genes decrease or increase the odds of five other conditions, with distinct biological consequences, two new preprints show.

By Natalia Mesa
4 September 2025 | 6 min read
A couple drinks tea at a café.

Partner selection may amplify rare variants in children

Nonrandom mating — the propensity for people to partner with others who share their traits — can increase the likelihood of autism or other conditions across generations.

By Calli McMurray
6 July 2023 | 5 min read
Illustration of mitochondria as a kind of Stonehenge, with the shapes standing upright, casting shadows, against a blue sky.

Mitochondria mediate effects of PTEN mutations

Whole-genome sequencing data — which include information about mitochondrial DNA — offer clues to why mutations in the same gene can lead to autism or cancer.

By Katie Moisse
26 June 2023 | 4 min read
Research diagram of brains viewed from overhead and in profile.

Brain signatures of rare variants hint at cardiovascular risk

People whose brains look like those of people who carry autism-linked copy number variants also share markers of heart health.

By Laura Dattaro
24 March 2023 | 4 min read
X chromosome against a dark background.

Common and rare autism-linked variants share functional effects

Within the 16p region of the genome, the two types of variants similarly decrease neuronal gene expression — an effect that may reflect their spatial relationship.

By Nora Bradford
1 December 2022 | 4 min read
A young girl rubs her eyes in a dark room.

Autistic people at increased genetic risk of sleep problems

Compared with their unaffected siblings and unrelated controls, children with autism harbor more copy number variants in genes that govern the circadian cycle or are associated with insomnia.

By Holly Barker
18 October 2022 | 5 min read
Conceptual illustration of a door leading from one area of the brain to another area of the brain.

Autism’s genetic heterogeneity evident in brain connectivity patterns

The results highlight the importance of subgrouping study participants based on their underlying genetics, the researchers say.

By Angie Voyles Askham
27 September 2022 | 5 min read
Illustration of two chromosomes with copy number variants.

‘Dosage sensitivity map’ predicts active ingredients in copy number variants

The catalog of rare copy number variants tied to autism and other conditions could help researchers identify which genes account for the mutations’ effects.

By Peter Hess
31 August 2022 | 4 min read
A large MRI scan of a human brain, with a grid of 15 smaller MRI scans to its left

Chromosome 22 mutations leave telltale marks on brain development in autistic people

Many brain regions develop differently between people with 22q11.2 duplications and deletions, and those trajectories also vary with a person’s diagnosis.

By Angie Voyles Askham
24 August 2022 | 4 min read

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Curvy lines link brain scans and a world map.

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