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Psychosomatic Medicine, Vol 37, Issue 5 417-428, Copyright © 1975 by American Psychosomatic Society

ORIGINAL ARTICLES

Menstrual cycle and ovarian hormone effects on plasma and platelet monoamine oxidase (MAO) and plasma dopamine-beta-hydroxylase (DBH) activities in the rhesus monkey

DE Redmond Jr, DL Murphy, J Baulu, MG Ziegler and CR Lake

Dopamine-B-hydroxylase (DBH) and monoamine oxidase (MAO) in plasma and platelets were studied in six female rhesus monkeys during three complete menstrual cycles. The same monoamine enzymes of seven bilaterally ovariectomized females were compared with a group of controls. A difference was found in platelet MAO between a mid-menstrual-cycle peak and a perimenstrual trough in these animals, while plasma MAO was unchanged. DBH showed an inverted cyclical variation to that demonstrated by platelet MAO. The ovariectomized females showed significant differences from the controls, confirming the effects of the ovarian sex steroid hormones on platelet MAO and plasma DBH. The variation in these peripheral enzymes may be reflective of changes in brain monoamine systems, which may play some role in the behavioral changes observed during the menstrual cycle in primates.




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Copyright © 1975 by the American Psychosomatic Society