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Published Online: 29 January 2009

Plasma GABA in Children and Adolescents with Mood, Behavior, and Comorbid Mood and Behavior Disorders: A Preliminary Study

Publication: Journal of Child and Adolescent Psychopharmacology
Volume 7, Issue Number 3

ABSTRACT

Plasma GABA concentrations (pGABA) were measured in 115 inpatients (aged 7–17) with child psychiatric disorders. Group mean pGABAs were compared for 38 patients with mood disorders only (MOOD), 29 with behavior disorders only (BEH), 48 with comorbid mood and behavior disorders (MOOD + BEH), and 14 normal controls (CON, aged 14–17). The BEH group was characterized by (a) high mean pGABAs (157 vs. 133 pmol/ml), (b) lower mean pGABAs in BEH subjects who had been receiving pharmacotherapy with SSRIs or other medications (p < 0.026), and (c) decreased pGABA with increasing age (p = 0.019). These features were not found in controls or in groups of patients with mood disorders (MOOD or MOOD + BEH). Elevated mean pGABA in the BEH group appeared specifically in patients with comorbid CD and ADHD, not in patients with ADHD or CD alone (p = 0.004). No patient in BEH (or CON) had pGABA below 100 pmol/ml, but low pGABAs were found in 15% of MOOD patients (who had no behavior disorder) and in 16% of MOOD + BEH patients. Pharmacotherapy did not change pGABAs in the MOOD or the MOOD + BEH groups. No pGABA differences were found among the anxiety disorders, either alone or with mood or behavior comorbidity. The finding that plasma GABA levels are elevated in nonmedicated behavior disorders that present in the absence of mood disorders, and appear to lower following medication treatments, merits increased attention to the pharmacological study of nonaffective behavior disorders.

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cover image Journal of Child and Adolescent Psychopharmacology
Journal of Child and Adolescent Psychopharmacology
Volume 7Issue Number 31997
Pages: 181 - 199
PubMed: 9466235

History

Published online: 29 January 2009
Published in print: 1997

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    CARROLL W. HUGHES, Ph.D.
    SABRI SHEIKHA, M.D., Ph.D.
    ROBERT A. KOWATCH, M.D.
    GERALD L. KRAMER, B.S.
    NORVA ROSENBARGER, B.A.
    FREDERICK PETTY, Ph.D., M.D.

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