A schizophrenia-associated mutation of DISC1 perturbs cerebral cortex development

Area of Science:

• Neuroscience
• Molecular Biology
• Genetics

Background:

• Schizophrenia is associated with neurodevelopmental abnormalities.
• The molecular mechanisms underlying these abnormalities are not fully understood.
• Disrupted-In-Schizophrenia-1 (DISC1) is genetically linked to schizophrenia.

Purpose of the Study:

• To investigate the role of DISC1 in neurodevelopment.
• To elucidate the molecular function of DISC1 in neuronal cells.
• To understand how DISC1 dysfunction contributes to schizophrenia pathology.

Main Methods:

• Biochemical assays to identify DISC1 interacting partners.
• Cellular studies to assess the impact of DISC1 on microtubule dynamics.
• In vitro and in vivo models to evaluate neurite outgrowth and brain development.

Main Results:

• DISC1 is a component of the microtubule-associated dynein motor complex.
• DISC1 is essential for maintaining the dynein complex at the centrosome and normal microtubule dynamics.
• A mutant form of DISC1 (mutDISC1) disrupts wild-type DISC1 function and impairs neurite outgrowth and cerebral cortex development.

Conclusions:

• DISC1 plays a critical role in cerebral cortex development.
• Loss of DISC1 function, potentially through dominant-negative mechanisms, may underlie neurodevelopmental deficits in schizophrenia.