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Cholinergic activity in autism: abnormalities in the cerebral cortex and basal forebrain
E K Perry1, M L Lee, C M Martin-Ruiz
1Centre Development in Clinical Brain Ageing, Newcastle General Hospital, Newcastle upon Tyne, UK. e.k.perry@ncl.ac.uk
The American Journal of Psychiatry
|June 30, 2001
Summary
Autism is linked to significant changes in brain nicotinic and M(1) cholinergic receptors, particularly in the cortex. These findings suggest the cholinergic system may be a target for autism interventions.
Area of Science:
- Neuroscience
- Neurobiology
- Autism Spectrum Disorder Research
Background:
- Neuropathological abnormalities in cholinergic nuclei are reported in autism.
- Investigating cholinergic transmitter activity is crucial for understanding autism's neurobiology.
Purpose of the Study:
- To investigate cholinergic transmitter activity in the brains of individuals with autism.
- To compare cholinergic enzyme and receptor activity in autistic and neurotypical adults.
Main Methods:
- Measured cholinergic enzyme and receptor activity in the frontal and parietal cerebral cortex of deceased autistic and control adults.
- Assessed brain-derived neurotrophic factor and nerve growth factor in the basal forebrain.
Main Results:
- Autistic adults showed significantly lower M(1) and nicotinic receptor binding in the cerebral cortex compared to controls.
- Specific nicotinic receptor subunits (alpha(4) and beta(2)) were reduced in the parietal cortex of autistic individuals.
- Brain-derived neurotrophic factor levels were elevated in the basal forebrain of autistic subjects.
Conclusions:
- Neurochemical abnormalities in the cholinergic system are implicated in autism.
- Cholinergic receptor modulation presents a potential therapeutic avenue for autism spectrum disorder.