[Association study of five pedigree with high incidence of schizophrenia].

This study is to explore the relationship between polymorphism of Catechol O-methyltransferase gene and schizophrenia. Search for a gene predisposing to schizophrenia in the Han nationality in China. Five pedigrees with high incidence of schizophrenia were studied by polymerize chain reaction(PCR) and restriction fragment length polymorphism(RFLP) technique. Statistics analysis of the transmission/disequilibrium test (TDT) showed that the COMT gene is associated with schizophrenia in the five pedigree with high incidence schizophrenia(P=0.0455). The results suggest that there might have a schizophrenia liability gene on 22 chromosome (22q11.2) in our studied pedigrees.