Platelet tritiated imipramine binding in patients suffering from mania
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Platelet imipramine binding was measured in 16 patients suffering from DSM-IIIR mania and compared with binding values reported in depressed and healthy control subjects recruited in a parallel study (Ellis et al., 1990). Binding levels in the manic group did not differ from control values, but were higher than in the depressed group. Within the manic group, binding did not differ with severity of illness or the presence of depressive symptoms but there was a trend to lower values (comparable to those in the depressed group) with increasing duration of illness. This raises the possibility that changes in imipramine binding in depression and mania may be similar, consistent with the permissive hypothesis of serotonin function.
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