title: No genetic association between dopamine D1 receptor gene and [early onset] schizophrenia.
abstract: Decreased dopaminergic activity in the prefrontal cortex (PFC) has been consistently reported in schizophrenia patients. The dopamine D1 receptor (DRD1) plays an important role in mediating dopaminergic transmission in the PFC. Controversy about this topic still exists despite ample evidence suggesting that the DRD1 gene is associated with performance on neuropsychological tests probing the function of the PFC in schizophrenia, as well as positive and negative symptoms and therapeutic response to antipsychotics. To determine whether this gene is involved in the etiology of schizophrenia, we undertook a case-control study to look for an association. We genotyped five single nucleotide polymorphisms (SNPs) rs4532, rs5326, rs2168631, rs6882300 and rs267418 within the DRD1 involving 373 schizophrenia patients with early age of onset and 379 healthy subjects. No significant differences of genotype, allele or haplotype distribution were identified between patients and controls. Our results do not preclude a possible role of DRD1 in the etiology of schizophrenia. As an important dopaminergic gene, DRD1 may contribute to schizophrenia by interacting with other genes. Further relevant studies are warranted.
authors.affiliation: Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, PR China.
authors.forename: Chen
authors.initials: C
authors.lastname: Zhang
authors.forename: Yiru
authors.initials: Y
authors.lastname: Fang
authors.forename: Bin
authors.initials: B
authors.lastname: Xie
authors.forename: Wenhong
authors.initials: W
authors.lastname: Cheng
authors.forename: Yasong
authors.initials: Y
authors.lastname: Du
authors.forename: Dongxiang
authors.initials: D
authors.lastname: Wang
authors.forename: Shunying
authors.initials: S
authors.lastname: Yu
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D016001:Confidence Intervals; D005260:Female; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D016017:Odds Ratio; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D017447:Receptors, Dopamine D1 / Q000235:genetics*; D012559:Schizophrenia / Q000235:genetics*; D055815:Young Adult
chemical_list: D017447:Receptors, Dopamine D1