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CNTN6 Modulates Slit-Robo Signaling in Cortical GABAergic Interneuron Migration.

Yiliang Xu^1,2, Tian Zhao^1,2, Dan Zhao^1,2

¹Department of Medical Genetics and Developmental Biology, School of Basic Medical Science, Capital Medical University, Beijing, 100069, China.

Neuroscience Bulletin

|June 13, 2026

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This summary is machine-generated.

Contactin-6 (CNTN6) protein inhibits Slit-Robo signaling, affecting GABAergic neuron migration. CNTN6 deficiency in male mice leads to autism-related behaviors, suggesting its role in neurodevelopmental disorders.

Area of Science:

Neuroscience
Developmental Biology
Genetics

Background:

Contactin-6 (CNTN6) is an immunoglobulin superfamily protein implicated in neurodevelopment and psychiatric disorders.
Its precise role in the etiology of conditions like autism spectrum disorders and schizophrenia requires further elucidation.

Purpose of the Study:

To investigate the molecular mechanism of CNTN6 in regulating neuronal development and its contribution to autism-related behaviors.
To determine how CNTN6 interacts with the Slit-Robo signaling pathway.

Main Methods:

In vitro and ex vivo assays to study CNTN6 interaction with Slit2 and Robo2.
Analysis of neurite outgrowth in cortical neurons.
Assessment of GABAergic neuron migration.
Behavioral testing in Cntn6-deficient male mice.

Keywords:

Autism spectrum disorder CNTN6 GABAergic interneuron Migration Slit2

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Main Results:

The N-terminal Ig domains of CNTN6 inhibit Slit-Robo signaling by competing with Robo2 for Slit2 binding.
CNTN6 interaction with Slit2 attenuates the repulsive effect of Slit2 on GABAergic neuron migration.
Cntn6-null male mice show reduced calbindin-positive GABAergic neurons and exhibit impaired social recognition and self-grooming behaviors.

Conclusions:

CNTN6 acts as an inhibitor of Slit-Robo signaling, modulating GABAergic neuron migration.
Dysfunction of CNTN6 contributes to autism-related behaviors through altered neuronal migration patterns.