How do established developmental risk-factors for schizophrenia change the way the brain develops?

Area of Science:

• Neuroscience
• Developmental Psychology
• Psychiatry

Background:

• Schizophrenia is increasingly recognized as a disorder of neurodevelopment.
• Epidemiological data supports the neurodevelopmental hypothesis, suggesting early life exposures impact adult brain function.
• Studying human brain development in utero is challenging, necessitating reliance on animal models.

Purpose of the Study:

• To review how major epidemiologically validated exposures alter brain formation and function relevant to schizophrenia.
• To explore convergent mechanisms underlying developmental brain abnormalities in schizophrenia models.
• To identify early disease-related pathways affected by disparate exposures.

Main Methods:

• Review of existing literature on animal models of early life exposures and schizophrenia.
• Analysis of longitudinal data examining brain ontogeny from embryo to adult in these models.
• Synthesis of findings related to stress, immune pathways, and dopamine neuron development.

Main Results:

• Early life exposures can lead to abnormal brain development and function relevant to schizophrenia symptoms.
• Convergent mechanisms involving stress and immune pathways are emerging from longitudinal studies.
• Consistent alterations in early dopamine neuron development are observed in animal models.

Conclusions:

• Understanding how various exposures induce similar developmental brain abnormalities may reveal convergent early disease pathways.
• Identifying these pathways could provide novel targets for schizophrenia prevention and treatment.
• Further research on brain ontogeny in animal models is crucial for elucidating schizophrenia's developmental origins.