Pathogenic POGZ mutation causes impaired cortical development and reversible autism-like phenotypes.

Area of Science:

• Neuroscience
• Genetics
• Developmental Biology

Background:

• Pogo transposable element derived with ZNF domain (POGZ) is frequently de novo mutated in neurodevelopmental disorders (NDDs), including autism spectrum disorder (ASD).
• The underlying neurobiological mechanisms connecting POGZ mutations to NDDs are not well understood.

Purpose of the Study:

• To investigate the role of POGZ in neuronal development.
• To elucidate the impact of ASD-associated de novo POGZ mutations on neuronal development and brain function.
• To develop and characterize a mouse model for POGZ-related ASD.

Main Methods:

• Utilized mouse brain and patient-derived induced pluripotent stem cell (iPSC) lines.
• Developed a novel mouse model heterozygous for a de novo POGZ mutation found in an ASD patient.
• Assessed neuronal development, brain abnormalities, and behavioral phenotypes in the mouse model.
• Investigated therapeutic interventions targeting cellular excitability.

Main Results:

• POGZ plays a critical role in regulating neuronal development.
• ASD-associated de novo POGZ mutations were found to impair neuronal development in both preclinical models and patient-derived cells.
• The developed POGZ mouse model exhibited ASD-like abnormalities, including social deficits.
• Compensatory inhibition of elevated cell excitability successfully treated social deficits in the POGZ mouse model.

Conclusions:

• De novo mutations in high-confidence ASD genes like POGZ disrupt mature cortical network function, contributing to the cellular pathogenesis of NDDs and ASD.
• Targeting cellular excitability presents a potential therapeutic strategy for social deficits in POGZ-related NDDs.