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A Preliminary Report

James F. Leckman, MD; Elliot S. Gershon, MD; Anna S. Nichols; Dennis L. Murphy, MD

Arch Gen Psychiatry. 1977;34(5):601-606.

Abstract
• Previous reports have indicated that platelet monoamine oxidase (MAO) activity is reduced in patients with the bipolar form of major affective illness. We present evidence that platelet MAO activity is also significantly reduced in the first-degree relatives of bipolar patients. However, platelet MAO activity did not distinguish ill from well family members. It is possible that reduced platelet MAO may be an indicator of increased familial vulnerability to affective disorders.

Author Affiliations
From the Unit on Psychogenetics, Adult Psychiatry Branch, National Institute of Mental Health, Bethesda, Md. Dr Leckman is now with the Department of Psychiatry, Yale University, New Haven, Conn.

Footnotes
Reprint requests to Unit on Psychogenetics, Adult Psychiatry Branch, National Institute of Mental Health, Bldg 10, Room 3N218, 9000 Rockville Pike, Bethesda, MD 20014 (Dr Gershon).

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