Early life sleep disruption potentiates lasting sex-specific changes in behavior in genetically vulnerable Shank3 heterozygous autism model mice.
Julia S Lord, Sean M Gay, Kathryn M Harper and 4 others
PMID 36038911WHAT IT FOUND
In mice with one mutated copy of the autism gene Shank3, sleep disruption during the first three weeks of life caused lasting behavioral changes in adulthood.
Effects differed by sex: females showed less risk aversion, while males showed reduced social preference and activity levels.
Key findings
01Early life sleep disruption (postnatal days 14-21) caused lasting, sex-specific behavioral changes in genetically vulnerable Shank3 heterozygous mice.
02Sleep disruption in early life, but not later post-adolescent disruption, led to reduced social preference in male Shank3 heterozygotes.
03Female Shank3 heterozygotes exposed to early life sleep disruption spent more time in open arms of an elevated maze, indicating decreased risk aversion.
STILL TO COME
How it was doneWhat they found
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What it does not show
The study was conducted entirely in mice. The authors note that mouse models of Shank3 heterozygosity show fewer behavioral phenotypes than humans, so the translation to human autism is speculative. The non-invasive sleep monitoring method used could not distinguish between REM and non-REM sleep, so the specific impact on sleep architecture remains unknown. The study focused on a specific genetic model (Shank3 ΔC). It is unclear if these findings apply to other genetic causes of autism or idiopathic autism. The behavioral tests were conducted in a standardized battery, but the mechanisms linking sleep disruption to the specific observed behaviors (e.g., risk aversion vs. social preference) were not determined.
Declared interests
The authors declare no competing interests. The work was supported by grants from the National Institutes of Health and non-U.S. government sources.
The easy way to misread this
Do not conclude that treating sleep problems in children with autism will reverse these specific behavioral traits. The study shows that sleep disruption can cause lasting changes in a vulnerable genetic model, but it does not demonstrate that correcting sleep after the fact restores normal behavior. The findings highlight sleep as a potential risk factor, not a proven therapeutic target for reversing established autism symptoms.