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Study M242

Study name

Sanacora G 2004

Title

Subtype-specific alterations of gamma-aminobutyric acid and glutamate in patients with major depression

Overall design

The aim of this study was to replicate the GABA findings in a larger sample of major depressive disorder (MDD) patients, to examine the clinical correlates of the GABA reductions in these subjects, and to examine other critical metabolite levels. The GABA measurements were made on healthy control subjects (control group, n = 38) and depressed subjects (depression group, n = 33). Occipital cortex metabolite levels were measured using proton magnetic resonance spectroscopy. The levels of occipital cortex GABA, glutamate, N-acetyl aspartate, aspartate, creatine, and choline-containing compounds, along with several measures of tissue composition, were compared between the 2 groups. The concentrations were determined assuming a concentration of 9 mmol/kg for creatine.

Study Type

Type1;

Data available

Unavailable

Organism

Human;

Categories of depression

Depressive disorder; Depression; Depression;

Criteria for depression

DSM-IV diagnosed MDD

Sample size

71

Tissue

Central; Brain; Occipital cortex;

Platform

MRS; MRS: 2.1-T magnet (Oxford Magnet Technology, Oxford, England) with spectrometer (Avance; Bruker Instruments, Billerica, Mass);

PMID

15237082

DOI

10.1001/archpsyc.61.7.705

Citation

Sanacora G, Gueorguieva R, Epperson CN, et al. Subtype-specific alterations of gamma-aminobutyric acid and glutamate in patients with major depression. Arch Gen Psychiatry 2004;61(7):705-13.

Metabolite

Gamma-Aminobutyric acid;

L-Glutamic acid;

Glutamate/GABA ratio;