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Study M226

Study name

Sanacora G 2002

Title

Increased occipital cortex GABA concentrations in depressed patients after therapy with selective serotonin reuptake inhibitors

Overall design

The aim of this study was to determine whether these occipital cortex GABA concentrations are altered after administration of selective serotonin reuptake inhibitors (SSRIs) in the treatment of depression. By means of proton magnetic resonance spectroscopy, occipital cortex GABA concentrations were measured in 11 medication-free depressed patients before initiation of treatment with SSRI medications and after an average of 2 months of treatment. Of the final 11 subjects, eight received fluoxetine (mean dose = 23.8 mg/d, SD=7.9), and three received citalopram (mean dose = 26.7 mg/d, SD=4.7). The integral of the GABA peak was adjusted for the macromolecular contribution and compared to the total creatine signal for absolute quantification.

Study Type

Type2;

Data available

Unavailable

Organism

Human;

Categories of depression

Depressive disorder; Depression; Depression;

Criteria for depression

DSM-IV diagnosed MDD

Sample size

11

Tissue

Central; Brain; Occipital cortex;

Platform

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

PMID

11925309

DOI

10.1176/appi.ajp.159.4.663

Citation

Sanacora G, Mason GF, Rothman DL, et al. Increased occipital cortex GABA concentrations in depressed patients after therapy with selective serotonin reuptake inhibitors. Am J Psychiatry 2002;159(4):663-5.

Metabolite

Gamma-Aminobutyric acid;