Psychotic symptoms in 16p11.2 copy-number variant carriers.
In 16p11.2 duplication carriers, both the gene change and autism raise psychosis risk—screen early.
01Research in Context
What this study did
Jutla et al. (2020) looked at 546 people who carry a 16p11.2 copy-number change. Some had the deletion, some the duplication, and some were their brothers or sisters without the change.
The team asked whether these carriers showed psychotic symptoms like hallucinations or delusions. They also checked if having autism on top of the gene change made symptoms more likely.
What they found
Two things raised the chance of psychotic symptoms: having the duplication (not the deletion) and having an autism diagnosis. Each factor added risk on its own.
The study found positive results, meaning the links were real, not due to chance.
How this fits with other research
Green Snyder et al. (2016) mapped the same gene group earlier. They saw autism in only one-fifth of duplication carriers and warned that outcomes vary widely. Amandeep adds a new red flag: even among these variable cases, watch for psychosis.
de Leeuw et al. (2024) studied school-age kids with 16p11.2 changes and found heavy externalizing behavior problems. Together with Amandeep’s psychosis data, the picture is clear: carriers can show both behavior storms and later psychotic signs—screen for both.
Smith et al. (2022) showed over 70 % of carriers have sensory issues. Kamara et al. (2023) found sleep trouble in carriers and their unaffected relatives. These papers stack on top of Amandeep’s work to build a full checklist: sensory, sleep, behavior, and now psychosis.
Why it matters
If you work with a client who has a 16p11.2 duplication, add brief psychosis screening to your intake. Ask about voices, visions, or fixed false beliefs—especially if the child also has an autism diagnosis. Early flag lets the team refer for psychiatric care before symptoms worsen. Pair this with the known sensory and sleep issues to build a full support plan.
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02At a glance
03Original abstract
16p11.2 copy-number variation (CNV) is implicated in neurodevelopmental disorders, with the duplication and deletion associated with autism spectrum disorder (ASD) and the duplication associated with schizophrenia (SCZ). The 16p11.2 CNV may therefore provide insight into the relationship between ASD and SCZ, distinct disorders that co-occur at an elevated rate, and are difficult to distinguish from each other and from common co-occurring diagnoses such as obsessive compulsive disorder (OCD), itself a potential risk factor for SCZ. As psychotic symptoms are core to SCZ but distinct from ASD, we sought to examine their predictors in a population (n = 546) of 16p11.2 CNV carriers and their noncarrier siblings recruited by the Simons Variation in Individuals Project. We hypothesized that psychotic symptoms would be most common in duplication carriers followed by deletion carriers and noncarriers, that an ASD diagnosis would predict psychotic symptoms among CNV carriers, and that OCD symptoms would predict psychotic symptoms among all participants. Using data collected across multiple measures, we identified 19 participants with psychotic symptoms. Logistic regression models adjusting for biological sex, age, and IQ found that 16p11.2 duplication and ASD diagnosis predicted psychotic symptom presence. Our findings suggest that the association between 16p11.2 duplication and psychotic symptoms is independent of ASD diagnosis and that ASD diagnosis and psychotic symptoms may be associated in 16p11.2 CNV carriers. Autism Res 2020, 13: 187-198. © 2019 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: Either deletion or duplication at chromosome 16p11.2 raises the risk of autism spectrum disorder, and duplication, but not deletion, has been reported in schizophrenia (SCZ). In a sample of 16p11.2 deletion and duplication carriers, we found that having the duplication or having an autism diagnosis may increase the risk of psychosis, a key feature of SCZ.
Autism research : official journal of the International Society for Autism Research, 2020 · doi:10.1002/aur.2232