title: Association between high platelet MAO activity and response to MAO inhibitor in depressed bipolars: case reports.
abstract: The authors describe two female patients with bipolar I depression who did not respond to tricyclic antidepressants in their previous depressive episodes and were prophylactic lithium nonresponders. Both patients showed a high pretreatment platelet MAO activity and responded well and rapidly to monoamine oxidase inhibition (MAOI) treatment. These findings suggest that although bipolar depressed patients show a low platelet MAO activity, there may be a subgroup with high enzyme activity. These patients revealed a low tendency to respond to tricyclic antidepressants and showed rapid improvement on MAOI therapy.
mesh_terms: D001714:Bipolar Disorder / Q000188:drug therapy* / Q000201:enzymology; D001792:Blood Platelets / Q000201:enzymology*; D005260:Female; D006801:Humans; D008875:Middle Aged; D008995:Monoamine Oxidase / Q000097:blood*; D008996:Monoamine Oxidase Inhibitors / Q000627:therapeutic use*
chemical_list: D008996:Monoamine Oxidase Inhibitors; D008995:Monoamine Oxidase