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Schizophrenia pathophysiology: are we any closer to a complete model?
Shaheen E Lakhan1, Karen F Vieira
1Global Neuroscience Initiative Foundation, Los Angeles, California, USA. slakhan@gnif.org
Annals of General Psychiatry
|May 19, 2009
Summary
Schizophrenia research explores genetic and neurodevelopmental factors. While specific genes show susceptibility, genetics alone doesn't cause schizophrenia, suggesting environmental influences are also critical for understanding this brain disorder.
Area of Science:
- Neuroscience
- Genetics
- Psychiatry
Background:
- Schizophrenia is a severe brain disorder characterized by hallucinations, disordered thinking, and cognitive deficits.
- Decades of research have sought to identify the early events leading to schizophrenia.
- Initial theories focused on hereditary factors due to familial incidence.
Purpose of the Study:
- To review proposed developmental and genetic models of schizophrenia.
- To examine associated treatment options.
- To assess the current understanding of schizophrenia pathophysiology.
Main Methods:
- Review of existing literature on schizophrenia.
- Interpretation of developmental and genetic models.
- Analysis of evidence for genetic, neurodevelopmental, and environmental causes.
Main Results:
- Specific genes (e.g., ZDHHC8, DTNBP1) suggest susceptibility but no single gene variation is definitively linked to schizophrenia.
- Evidence from sporadic cases refutes genetics as the sole cause.
- Neurodevelopmental and environmental factors, including viral infections and prenatal/perinatal complications, are increasingly implicated.
Conclusions:
- Current understanding of schizophrenia pathophysiology remains inadequate.
- Multiple cognitive neuroscientific models integrating diverse biomedical evidence are needed but are in early development.
- The complex etiology of schizophrenia necessitates a multifactorial approach considering genetics, development, and environment.
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