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Schizophrenic Patients Receiving Tryptophan and Methionine or Methionine Together With a Monoamine Oxidase Inhibitor

H. H. BERLET, MD; K. MATSUMOTO, MD; G. R. PSCHEIDT, PhD; J. SPAIDE, MS; C. BULL, MD; H. E. HIMWICH, MD

Arch Gen Psychiatry. 1965;13(6):521-531.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

IN THE FIRST part of this longitudinal study,^3,6 a reduced intake of methionine and tryptophan failed to affect schizophrenic behavior conclusively. During this period of seven months of continuously controlled tryptophan intake we found that increases of urinary indoles occurred independently of tryptophan intake when schizophrenic symptoms in some of the patients grew worse spontaneously. The excretions of catecholamines³⁴ and urinary steroid hormones²⁸ were also elevated with accompanying motor hyperactivity, increased tension and anxiety.

The objective of the second part of this investigation was to study the behavioral responses to increases of methionine and tryptophan as well as that of methionine given together with a monoamine oxidase inhibitor (MAOI). Both improvement and worsening of behavior have been reported for normal, schizophrenic, and depressed subjects.^9,14,27,32 It appeared, therefore, of interest to study urinary excretion patterns in relation to amino acid intake and accompanying . . . [Full Text PDF of this Article]

Author Affiliations
GALESBURG, ILL

From the Thudichum Psychiatric Research Laboratory, Galesburg State Research Hospital. Department of Neuropsychiatry, Osaka University Medical School, Osahi-Machi, Aben-Ku, Osaka, Japan (Dr. Matsumoto) and Butler Hospital, Providence, RI (Dr. Bull).

Footnotes
Submitted for publication March 18, 1965.

Reprint requests to State of Illinois Department of Mental Health Galesburg State Research Hospital, Galesburg, Ill 61404 (Dr. Himwich).

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