Cholecystokinin upregulation in mPFC leads to social defeat-induced anxiety susceptibility in neuroligin 3 R451C knockin mice.
Yuzhen Fu, Yuke Xu, Huiyi Li and 15 others
PMID 41699722WHAT IT FOUND
In autistic mice, a brain peptide called CCK stayed high in the prefrontal cortex into adulthood.
This caused exaggerated anxiety after social bullying. Removing CCK in this brain area reversed the anxiety, suggesting a specific biological target for stress sensitivity.
Key findings
01Adult mice with the autism-related mutation had abnormally high numbers of CCK-positive excitatory neurons in the medial prefrontal cortex, a region where levels normally drop with age.
02These mice showed no anxiety at baseline but developed pronounced anxiety-like behaviors after social defeat stress, unlike control mice which remained resilient.
03Reducing CCK expression in this brain region reversed the stress-induced anxiety, while artificially increasing it in control mice made them vulnerable to stress-induced anxiety.
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, so the mechanisms may not translate directly to humans. Only male mice were used, leaving it unclear if the same process occurs in females. The anxiety response to a single brief stress event faded after one week, suggesting that repeated or more intense stress is needed for long-term effects. The study used a specific genetic model of autism (NL3 R451C), which represents only a small fraction of human ASD cases.
Declared interests
The study was funded by the Ministry of Science and Technology of the People's Republic of China, the National Natural Science Foundation of China, and the Autism Research Special Fund of Zhejiang Foundation For Disabled Persons. No commercial conflicts of interest were declared.
The easy way to misread this
Do not interpret this as evidence that CCK-blocking drugs will treat anxiety in human autistic patients. The study identifies a biological mechanism in mice; no human clinical trials were conducted, and the intervention involved direct viral gene manipulation in the brain, not medication.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →