No major role for the dopamine D2 receptor Ser → Cys311 mutation in schizophrenia

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Abstract
A new structural polymorphism (Ser311/Cys311) in the dopamine D2 receptor (DRD2) gene has recently been reported to be associated with schizophrenia, particularly in patients with a positive family history of schizophrenia (Arinimi et al., 1994). However these findings remain controversial (Asherson et al., 1994; Nanko et al., 1994; Nöthen et al., 1994; Shaikh et al., 1994). Thus we investigated the role of the Cys311 mutation in schizophrenia using both association and family studies. First, we screened for the Cys311 mutation in 113 unrelated Caucasian schizophrenics (mean age 42 +/- 0.6; 34 females and 79 males) including 25 familial cases, and 184 unrelated controls (mean age 49 +/- 0.5, 74 females and 110 males) free of any psychiatric disorders. Diagnoses were ascertained according to DSM-III criteria (Campion et al., 1994). All patients and controls were native to the area of Rouen.

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