A Novel Chd8 Mutant Mouse Displays Altered Ultrasonic Vocalizations and Enhanced Motor Coordination.
Samuel W Hulbert, Xiaoming Wang, Simisola O Gbadegesin and 3 others
PMID 32815320WHAT IT FOUND
A new mouse model of a common autism-linked gene mutation showed enhanced motor coordination and altered vocalizations, but no social deficits or repetitive behaviors.
These findings contradict human autism symptoms, suggesting this specific mouse line is a poor model for clinical translation.
Key findings
01The mutant mice performed significantly better than wild-type mice on the rotarod test for motor coordination.
02The mutant mice showed no significant deficits in social interaction or novelty recognition compared to controls.
03The mutant mice displayed altered ultrasonic vocalizations, with increased call duration in adults and increased call number in pups.
STILL TO COME
How it was doneWhat they found
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What it does not show
This is an animal study; findings in mice do not directly translate to human clinical practice. The authors state the model does not seem to mimic the human disorder well, as the motor improvements contradict the motor impairments typically seen in humans with autism. Sample sizes for some vocalization tests were limited. Behavioral phenotypes varied significantly between this new line and other existing Chd8 mouse lines, raising questions about consistency.
Declared interests
The study was supported by the National Institutes of Health (NIH) and non-US government research funding. No other conflicts of interest are reported in the provided text.
The easy way to misread this
Do not interpret the improved motor coordination in these mice as a potential therapeutic target for human autism. The authors explicitly note this finding contradicts the motor impairments typically observed in human patients and suggests the model fails to capture the core behavioral features of the disorder.