Mice mutant for genes associated with schizophrenia: common phenotype or distinct endophenotypes?

Area of Science:

• Neuroscience
• Genetics
• Psychiatry

Background:

• Schizophrenia is a complex neuropsychiatric disorder with mixed genetic and environmental origins.
• Research converges on identifying susceptibility genes and understanding pathophysiology.
• Animal models, particularly mice, are crucial for studying gene function and behavior.

Purpose of the Study:

• To review knowledge from mutant mouse studies on gene contributions to schizophrenia phenotypes.
• To examine the role of genes in abnormal brain development and schizophrenia endophenotypes.
• To emphasize gene x environment and gene x gene interactions in schizophrenia.

Main Methods:

• Gene-driven approach: Identifying susceptibility genes and studying their behavioral roles via targeted mouse manipulation.
• Phenotype-driven approach: Investigating mouse models with genetic mutations related to schizophrenia pathophysiology.
• Review of existing literature on genetic manipulation and phenotyping in mice.

Main Results:

• Several schizophrenia susceptibility genes and numerous pathophysiology-related genes have been genetically manipulated in mice.
• Mutant studies provide insights into the ontogeny of schizophrenia-like phenotypes.
• The contribution of specific genes to common and discrete schizophrenia endophenotypes is being elucidated.

Conclusions:

• Mutant mouse studies are vital for understanding the genetic basis of schizophrenia.
• Investigating gene x environment and gene x gene interactions is crucial.
• Methodological advancements in genetic modeling and phenotyping are essential for future research.