Recent developments in the genetics of schizophrenia

Objectives: To examine the evidence concerning the recent developments in the genetics of schizophrenia, Methods: An extensive literature search was performed and relevant papers were examined and analysed. Findings: There is overwhelming evidence that schizophrenia shows familial aggregation. Recent molecular genetic studies support the presence of susceptibility genes on chromosomes 6 and 22. In addition, an association between schizophrenia, the dopamine D3 receptor gene and the 5-HT2a receptor gene has also been demonstrated. Conclusions: Recent advances in DNA technology have paved the way for the detection of genes of major and minor effects in the aetiology of schizophrenia, If the presence of the recently identified susceptibility genes is confirmed, it is likely that these genes will be recognised in the near future.