title: [No association of 141C-ins/del polymorphism in the D2 dopamine receptor gene in schizophrenia].
abstract: Recently, a putative functional polymorphism (-141C Ins/Del) in the 5'-flanking region of the dopamine D2 receptor was found. An association of the Ins allele with schizophrenia has been described in a Japanese sample. In the present study this association was examined in a German schizophrenia patient population. In a family based approach 190 German family trios were analyzed for the -141C Ins/Del genotype. Using the transmission disequilibrium test (TDT) we found no evidence for an association of the Ins allele with schizophrenia (TDT = 0.152, P = 0.696). In parallel, we performed an independent case control study with 268 schizophrenic patients and 244 controls. Again, we did not detect an overrepresentation of the Ins allele in patients (P = 0.124). Thus, our data do not support the hypothesis that the -141C Ins variant plays a major role in predisposition to schizophrenia. To confirm our conclusion further preferentially family based studies are needed.
mesh_terms: D000328:Adult; D000483:Alleles; D016022:Case-Control Studies; D002872:Chromosome Deletion; D004252:DNA Mutational Analysis; D005260:Female; D020022:Genetic Predisposition to Disease / Q000235:genetics; D006801:Humans; D015810:Linkage Disequilibrium / Q000235:genetics; D008297:Male; D008875:Middle Aged; D016254:Mutagenesis, Insertional; D011110:Polymorphism, Genetic / Q000235:genetics*; D011401:Promoter Regions, Genetic / Q000235:genetics; D017448:Receptors, Dopamine D2 / Q000235:genetics*; D012306:Risk; D012559:Schizophrenia / Q000235:genetics*
chemical_list: D017448:Receptors, Dopamine D2