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Increased plasma serine concentrations in depression

M Maes1, G De Backer, E Suy

  • 1Department of Psychiatry, Case Western Reserve University, Cleveland, Ohio.

Neuropsychobiology
|January 1, 1995
PubMed
Summary
This summary is machine-generated.

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Plasma serine levels are elevated in depressed individuals compared to healthy controls. This finding suggests a potential role for serine in the biology of depression.

Area of Science:

  • Biochemistry
  • Neuroscience
  • Psychiatry

Background:

  • Elevated plasma serine concentrations have been linked to psychoses like schizophrenia.
  • Understanding biochemical markers in depression is crucial for diagnosis and treatment.

Purpose of the Study:

  • To investigate plasma serine levels in various subtypes of depression.
  • To compare serine levels between depressed patients and normal controls.
  • To explore the relationship between plasma serine, cortisol, and L-tryptophan in depression.

Main Methods:

  • Plasma serine concentrations were measured in 123 depressed subjects (minor, simple major, melancholic) and 50 healthy controls.
  • Cortisol levels were assessed post-dexamethasone administration.
  • Correlations between plasma serine, cortisol, and L-tryptophan were analyzed.

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Main Results:

  • Depressed subjects exhibited significantly higher plasma serine levels than normal controls.
  • Dexamethasone suppressed plasma serine levels in depressed individuals but not in controls.
  • Positive correlations between plasma serine and L-tryptophan were observed in controls, but not in depressed subjects.

Conclusions:

  • Plasma serine may serve as a biological marker for depression.
  • Serine metabolism appears to be dysregulated in depression and is sensitive to dexamethasone suppression.
  • The relationship between serine and L-tryptophan differs between depressed individuals and healthy controls.