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Published on: October 17, 2025
Reduced plasma levels of microtubule-associated STOP/MAP6 protein in autistic patients
Hongen Wei1, Shibang Sun2, Yonghong Li3
1Department of Rehabilitation Medicine, Shanxi Provincial People's Hospital, Affiliate of Shanxi Medical University, 29 Shuangta Road, 030012 Taiyuan, China.
Abstract:
Autism is a neurodevelopmental disorder characterized by abnormal reciprocal social interactions, communication deficits and repetitive behaviors with restricted interests. A previous quantitative proteomic profiling study demonstrated that microtubule-associated stable tubule only polypeptide (STOP; also known as MAP6) protein was significant reduced in the cerebral cortex from BTBR mouse model of autism compared to the C57BL/6J mice. In the present study, the result showed that the concentration of STOP/MAP6 protein was significantly reduced in the plasma of autistic subjects than that in healthy controls. Finally, a possible mechanism of STOP/MAP6 protein in the pathogenesis of autism was proposed.
Insights
Autism spectrum disorder is linked to lower levels of the stable tubule only polypeptide (STOP) protein. This protein reduction was observed in the brain of an autism mouse model and in the plasma of autistic individuals.
Area of Science:
- Neuroscience
- Biochemistry
- Genetics
Background:
- Autism is a neurodevelopmental disorder affecting social interaction and communication.
- Previous studies indicated reduced stable tubule only polypeptide (STOP) protein in the autistic mouse brain.
- STOP/MAP6 is crucial for microtubule stability, impacting neuronal function.
Purpose of the Study:
- To investigate STOP/MAP6 protein levels in plasma of individuals with autism.
- To explore the potential role of STOP/MAP6 in autism pathogenesis.
Main Methods:
- Quantitative proteomic profiling was used in a previous study on a BTBR mouse model.
- Plasma samples from autistic subjects and healthy controls were analyzed.
- ELISA or Western blotting may have been used for protein quantification (details not in abstract).
Main Results:
- The concentration of STOP/MAP6 protein was significantly reduced in the plasma of autistic subjects compared to healthy controls.
- This finding complements previous observations in the BTBR mouse model.
Conclusions:
- Reduced STOP/MAP6 protein in plasma may serve as a potential biomarker for autism.
- Altered STOP/MAP6 levels could contribute to the neurobiological underpinnings of autism spectrum disorder.
Related Concept Videos
Microtubule Associated Proteins (MAPs)
Microtubule Instability
Destabilization of Microtubules
Autism Spectrum Disorder
These core symptoms manifest differently among individuals, ranging from mild to severe. The disorder's complexity extends beyond its clinical presentation, encompassing a diverse range of biological, cognitive, and sociocultural influences.
Drugs that Stabilize Microtubules

