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  • Title: Tritiated imipramine binding in obsessive-compulsive volunteers and psychiatrically normal controls.
    Author: Black DW, Kelly M, Myers C, Noyes R.
    Journal: Biol Psychiatry; 1990 Feb 01; 27(3):319-27. PubMed ID: 2154266.
    Abstract:
    The authors evaluated platelet tritiated imipramine binding in 22 outpatients with obsessive-compulsive disorder (OCD) and 22 psychiatrically normal controls matched for age and gender. Mean maximal binding site density (Bmax) and equilibrium dissociation affinity (Kd) values were not significantly different. In OCD patients, Bmax was positively associated with age but was not associated with age of onset, gender, personality disorder, or five measures of illness severity. Eight patients with OCD were subsequently treated with clomipramine up to 300 mg/day for 10 weeks. Among these 8 patients, Bmax values had a 65% mean decrease from baseline, but Bmax values did not change among 7 OCD patients receiving placebo. The results suggest that a reduced density of tritiated imipramine binding sites may not be associated with OCD.
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